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Huntair Pathfinder Mark 1 ultralight

Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with ailerons, elevator and rudder, calling the former "microlight" and the latter "ultralight".

During the late 1970s and early 1980s, mostly stimulated by the hang gliding movement, many people sought affordable powered flight. As a result, many aviation authorities set up definitions of lightweight, slow-flying aeroplanes that could be subject to minimum regulations. The resulting aeroplanes are commonly called "ultralight aircraft" or "microlights", although the weight and speed limits differ from country to country. In Europe, the sporting (FAI) definition limits the maximum stalling speed to 65 km/h (35 kn) and the maximum take-off weight to 450 kg (992 lb), or 472.5 kg (1,042 lb) if a ballistic parachute is installed. The definition means that the aircraft has a slow landing speed and short landing roll in the event of an engine failure.[1]

In most affluent countries, microlights or ultralight aircraft now account for a significant percentage of the global civilian-owned aircraft. For instance, in Canada in February 2018, the ultralight aircraft fleet made up to 20.4% of the total civilian aircraft registered.[2] In other countries that do not register ultralight aircraft, like in the United States, it is unknown what proportion of the total fleet they make up. In countries where there is no specific extra regulation, ultralights are considered regular aircraft and subject to certification requirements for both aircraft and pilot.

Definitions

[edit]
Definitions of ultralight aircraft
Country Type Capacity MTOW Time Licence Other conditions
Australia Recreational Aircraft[3] 2 600 kg (1,323 lb); 614 kg (1,354 lb) for seaplanes — — —
Light Sport Aircraft[4] 2 600 kg (1,323 lb); 650 kg (1,433 lb) for seaplanes — — —
Brazil Ultralight 2 750 kg (1,653 lb) Daylight visual conditions — Used mainly (or intended for) sports or recreation[5]
Canada basic ultra-light aeroplane 2 1,200 lb (544 kg) Daylight visual conditions Ultralight Pilot Permit Craft may be operated from land or water
advanced ultra-light aeroplane 2 1,232 lb (559 kg) Daylight visual conditions Ultralight Pilot Permit Craft may only carry a passenger if the pilot has an Ultralight Aeroplane Passenger Carrying Rating; may operate at a controlled airport without prior arrangement[6]
Europe[7] land plane/helicopter, single-seater 1 300 kg Daylight VFR Ultralight Pilot Permit Sport or recreation only
land plane/helicopter, two-seater 2 450 kg (992 lb) Daylight VFR Ultralight Pilot Permit Sport or recreation only
amphibian or floatplane/helicopter single-seater 2 495 kg (1,091 lb) Daylight VFR Ultralight Pilot Permit where operating both as a floatplane/helicopter and as a land plane/ helicopter, it falls below both MTOW limits, as appropriate
land plane, two-seater equipped with an airframe mounted total recovery parachute system 2 472.5 kg (1,042 lb) Daylight VFR Ultralight Pilot Permit Sport or recreational use only
land plane single-seater equipped with an airframe mounted total recovery parachute system 1 315 kg (694 lb) Daylight VFR Ultralight Pilot Permit Sport or recreational use only
gyroplane 1–2 560 kg (1,235 lb) Daylight VFR Ultralight Pilot Permit Sport or recreational only
India — 2 450 kg (992 lb) without parachute — current permit to fly[8] —
Italy ultraleggero 1–2 Max Take Off Weight MTOW

2 persons, 622.5 kg (1,372 lb) (600 kg (1,323 lb) without parachute)

  • Hydroplanes, 650 kg (1,433 lb)
  • Single, 300 kg (661 lb)
  • Hydroplane single, 330 kg (728 lb)

Stall speed 65 km/h (35 kn)

Daylight, minimum of 500 ft (152 m). certificate exam, insurance and a medical examination.[9] Requires a helmet only for open cockpit aircraft. Flying over populated areas and assemblies of people are prohibited.[10]
Japan Ultra light power machine[11][12]

(undefined in Civil Aeronautics Act)

1–2[11][12] Max empty weight:
  • 180 kg (397 lb) (1 seat)
  • 225 kg (496 lb) (2 seats), with extra weight allowed for emergency parachute up to 11 kg (24 lb) and for floats up to 28 kg (62 lb)[11][12]
 Daylight visual conditions[13] Minister's permission carried on board for each year[13] instead of licence[14][15]

Passengers also need permission.[13]

Sports or recreational use only[12]

Other minister's permissions:

  • flight permission (for each 2 – 4 months)[12][14][15]
  • Permission of land owner for landing and for take off[14][15]

Flyable area: uncontrolled airspace over unpopulated areas, within 3 km (2 mi) from departure point and landing at another point forbidden.[13]

Aircraft:

  • powered, non-certified, propeller aircraft, including autogyro, with landing gear
  • Minimum required equipment: airspeed indicator and altimeter
  • Maximum stall speed: 65 km/h (35 kn)
  • Minimum wing area: 10 m (33 ft)2
  • Maximum speed: 185 km/h (100 kn)
  • Maximum fuel capacity: 30 L (8 US gal)[12][14]
New Zealand NZ Class 1 1 Single seat 510 kg (1,124 lb), 550 kg (1,213 lb) for seaplanes; Stall speed 45 kn (83 km/h; 52 mph). Daytime VFR Microlight Licence required[citation needed] Part 103 Microlight Aircraft Operating Rules,[16] Part 103 advisory circulars[17]
NZ Class 2 2 2 Seats 600 kg (1,323 lb), 650 kg (1,433 lb) for seaplanes; Stall speed 45 kn (83 km/h; 52 mph) Daytime VFR Microlight Licence required[citation needed] Part 103 Microlight Aircraft Operating Rules,[16] Part 103 advisory circulars[17]
Philippines non-type certified aircraft[18][19] — — Daytime VFR — recreational and sport use
United Kingdom Sub-70 kg (154 lb) Unregulated, Single seat deregulated, 2-seat regulated. 1–2[20] Several definitions, from 70 kg with full fuel to 650 kg (1,433 lb) maximum weight at take-off Daytime VFR Licence not required for Sub-70 kg, NPPL licence required otherwise[21][22] Recreational. No paid work.
United States ultralight aircraft 1 Empty weight of less than 254 lb (115 kg) [23][24] Daylight hours no license required less than 5 US gal (19 L) fuel capacity, empty weight of less than 254 pounds, a top speed of 55 kn (63 mph; 102 km/h), and a maximum stall speed not exceeding (24 kn (28 mph; 44 km/h)). May only be flown over uncongested areas.
light-sport aircraft 2 1,320 lb (599 kg); 1,430 lb (649 kg) for seaplanes. Daytime VFR sport pilot certificate
  • Max. Speed (CAS) in Level Flight 138 mph (120 kn; 222 km/h)
  • Max. Stall Speed 51 mph (44 kn; 82 km/h)

Must have fixed landing gear, and a single engine with fixed pitch propeller.

Pegasus Quantum 145-912 ultralight trike
Flight Design CTSW
A powered paraglider
A US-made Pterodactyl Ascender ultralight on a camping flight
Canadian Lazair ultralight covered in clear Mylar
A foot-launched powered hang glider

Australia

[edit]

In Australia, ultralight aircraft and their pilots can either be registered with the Hang Gliding Federation of Australia (HGFA)[25] or Recreational Aviation Australia (RA Aus).[26] In all cases, except for privately built single seat ultralight aeroplanes,[27] microlight aircraft or trikes are regulated by the Civil Aviation Regulations.

Canada

[edit]
Main article: Ultralight aircraft (Canada)

United Kingdom

[edit]

Pilots of a powered, fixed wing aircraft or paramotors do not need a licence, provided its weight with a full fuel tank is not more than 75 kg (165 lb), but they must obey the rules of the air.[28]

For heavier microlights the current UK regulations are similar to the European ones, but helicopters and gyroplanes are not included.[29]

Other than the very earliest aircraft, all two-seat UK microlights (and until 2007 all single-seaters) have been required to meet an airworthiness standard; BCAR Section S.[30] In 2007, Single Seat DeRegulated (SSDR), a sub-category of single seat aircraft was introduced, allowing owners more freedom for modification and experiments. By 2017 the airworthiness of all single seat microlights became solely the responsibility of the user, but pilots must hold a microlight licence;[31] currently NPPL(M) (National Private Pilots Licence).

New Zealand

[edit]

Ultralights in New Zealand are subject to NZCAA General Aviation regulations[32] with microlight specific variations as described in Part 103[33] and AC103-1.[34]

United States

[edit]
Main article: Ultralight aircraft in the United States

The United States FAA's definition of an ultralight is significantly different from that in most other countries and can lead to some confusion when discussing the topic. The governing regulation in the United States is FAR 103 Ultralight Vehicles. In 2004, the FAA introduced the "Light-sport aircraft" category, which resembles some other countries' microlight categories. Ultralight aviation is represented by the United States Ultralight Association (USUA), which acts as the US aeroclub representative to the Fédération Aéronautique Internationale.

Types

[edit]

There are several categories of aircraft which qualify as ultralights in some countries:

  • Fixed-wing aircraft: traditional airplane-style designs.
  • Weight-shift control trike: use a hang glider-style wing, below which is suspended a three-wheeled carriage which carries the engine and aviators. These aircraft are controlled by pushing against a horizontal control bar in roughly the same way as a hang glider pilot flies.
  • Powered parachute: fuselage-mounted engines with parafoil wings, which are wheeled aircraft.
  • Powered paraglider: backpack engines with parafoil wings, which are foot-launched.
  • Powered hang glider: motorized foot-launched hang glider harness.
  • Autogyro: rotary wing with fuselage-mounted engine, a gyrocopter is different from a helicopter in that the rotating wing is not powered, the engine provides forward thrust and the airflow through the rotary blades causes them to autorotate or "spin up" thereby creating lift.
  • Helicopter: there are a number of single-seat and two-place helicopters which fall under the microlight categories in countries such as New Zealand. However, few helicopter designs fall within the more restrictive ultralight category defined in the United States of America.
  • Hot air balloon: there are numerous ultralight hot air balloons in the US, and several more have been built and flown in France and Australia in recent years. Some ultralight hot air balloons are hopper balloons, while others are regular hot air balloons that carry passengers in a basket.

Electric

[edit]

Advancements in batteries, motors, and motor controllers has led to some practical production electric propulsion systems for some ultralight applications. In many ways, ultralights are a good application for electric power as some models are capable of flying with low power, which allows longer duration flights on battery power.[35]

In 2007, the first pioneering company in this field, the Electric Aircraft Corporation, began offering engine kits to convert ultralight weight shift trikes to electric power. The 18 hp motor weighs 26 lb (12 kg) and an efficiency of 90% is claimed by designer Randall Fishman. The battery consists of a lithium-polymer battery pack of 5.6 kWh which provides 1.5 hours of flying in the trike application. The company claimed a flight recharge cost of 60 cents in 2007.[35][36]

A significant obstacle to the adoption of electric propulsion for ultralights in the U.S. is the weight of the battery, which is considered part of the empty weight of the aircraft despite efforts to have it considered as fuel.[37] As the specific energy of batteries improves, lighter batteries can be used.

See also

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Ultralight aviation

View on Grokipedia
from Grokipedia
Ultralight aviation refers to the operation of lightweight, single-occupant aircraft designed primarily for recreational or sport flying, exempt from standard airworthiness certification and pilot licensing requirements under specific regulatory frameworks. These vehicles include fixed-wing airplanes, powered parachutes, weight-shift trikes, and rotorcraft, emphasizing simplicity, affordability, and accessibility for enthusiasts seeking the pure experience of flight. In the United States, ultralights are defined by Federal Aviation Regulations (FAR) Part 103 as unpowered vehicles weighing less than 155 pounds or powered vehicles with an empty weight under 254 pounds (excluding floats and safety devices), a maximum fuel capacity of 5 U.S. gallons, a top speed of no more than 55 knots at full power, and a power-off stall speed of 24 knots or less. This category enables solo operations without a pilot certificate or medical clearance, provided the vehicle meets these criteria and is used solely for sport or recreation. The origins of ultralight aviation trace back to the evolution of in the early , when enthusiasts began adding small engines to gliders for powered flight, leading to the development of simple, . By the mid-, pioneers like those modifying the hang glider created the first crude ultralights, sparking a grassroots movement that grew rapidly in popularity during the late and early . In response to increasing activity, the U.S. issued FAR Part 103 on October 4, 1982, to integrate these vehicles safely into the while preserving their regulatory exemptions. Internationally, similar concepts emerged under terms like "microlight" , with regulations varying by country; for example, in , ultralights operate under standards without uniform international , focusing on basic construction and operational limits. Key operational rules for ultralights prioritize safety and compatibility, prohibiting flights over congested areas, requiring daylight operations (with limited exceptions), and mandating visual reference to the ground along with minimum visibility and cloud clearance standards. Ultralights must yield right-of-way to all other and obtain clearance for . While no formal pilot training is mandated, organizations like the (EAA) strongly recommend instruction to mitigate risks associated with these high-drag, low-mass vehicles, which have unique handling characteristics compared to certified . The sector continues to evolve, with recent U.S. regulatory updates like the 2025 rules expanding related light-sport categories, though core ultralight standards remain unchanged to maintain their appeal for recreational pilots.

History

Origins and Early Developments

The origins of ultralight aviation trace back to the late , when German aviation pioneer developed and flew early hang gliders. Beginning with his first successful glider flights in 1891 from an artificial hill near , Lilienthal conducted over 2,000 experiments, demonstrating controlled gliding through body-weight shifts under a fixed-wing structure made of willow frames and cotton fabric. His work emphasized the principles of and balance, influencing subsequent generations of aviators despite his fatal crash in 1896. A key conceptual advancement occurred in 1948 with the invention of the flexible wing by engineer Francis Rogallo and his wife Gertrude. Working from their home, they created the "Flexi-Kite," a V-shaped fabric structure supported by a simple frame that could generate lift like a kite or glider, offering inherent stability and ease of control. Patented in 1951, the provided a lightweight, collapsible design adaptable for manned flight, serving as the basis for modern hang gliders and powered ultralights. The 1970s marked a grassroots explosion in hang gliding across the United States and Europe, driven by affordable do-it-yourself kits priced under $1,000 and the rapid formation of local clubs that offered training and community support. This enthusiasm transformed the activity from experimental hobby to accessible recreation, with manufacturers like Wills Wing and Eipper Formance producing Rogallo-inspired gliders in large numbers. Publications such as Hang Gliding magazine, launched in 1974 by the United States Hang Gliding and Paragliding Association (USHPA), further fueled the boom by disseminating flight techniques, safety advice, and event coverage to a growing audience. By 1980, the sport had attracted tens of thousands of participants worldwide, with USHPA membership surpassing 10,000 in the early 1980s. Powered ultralights emerged during this era as enthusiasts added small engines to hang gliders, enabling self-launch capability from flat ground. A seminal example was John Moody's Icarus II hang glider, which achieved its first powered flight on March 15, 1975, using a 12.5-horsepower engine strapped to the frame for reliable takeoff at low speeds. This innovation, often credited with launching the powered ultralight movement, inspired further designs like John Chotia's Weedhopper, whose prototypes flew in 1978 and became one of the earliest production kits, emphasizing simplicity, low cost, and minimal regulations.

Regulatory Evolution and Milestones

The regulatory framework for ultralight aviation began to formalize in the early 1980s, driven by the need to integrate these lightweight vehicles into national systems without imposing full certification burdens. In the United States, the (FAA) adopted 14 CFR Part 103 on July 30, 1982, effective October 4, 1982, which defined ultralight vehicles as single-occupant with an empty weight not exceeding 254 pounds (115 kg), a capacity of no more than 5 U.S. gallons (19 L), a maximum speed of 55 knots (102 km/h) at full power in level flight, and a power-off stall speed not exceeding 24 knots (44 km/h). This regulation exempted ultralights from , airworthiness certification, and pilot licensing requirements, emphasizing operator responsibility for safety while restricting operations to daylight in . In , the (JAA) introduced the Joint Aviation Requirements for Very Light Aeroplanes (JAR-VLA) on April 26, 1990, establishing airworthiness standards for aircraft up to 750 kg maximum takeoff weight, including simplified certification processes, noise limits, and structural requirements tailored to akin to ultralights. Amendment 1 to JAR-VLA, effective November 1, 2004, further refined performance and safety criteria. Following the formation of the European Aviation Safety Agency (EASA) in 2003, these evolved into Certification Specifications for Very Light Aeroplanes (CS-VLA), initially issued in December 2009 and incorporating updated noise and emissions rules while maintaining compatibility with JAR-VLA for transitional certification. During the 1990s, several countries developed dedicated national registries to standardize ultralight operations. In , the (CASA) expanded upon the 1976 Civil Aviation Order (CAO) 95.10, with Recreational Aviation Australia (RAAus)—formed in 1986—becoming the primary body for certifying and registering ultralights up to 600 kg by the early 1990s, emphasizing self-regulation and safety audits. In Canada, issued the Ultra-light Aeroplane Policy in 1991, creating categories for basic ultralight aeroplanes (BULA) and advanced ultralight aeroplanes (AULA), both with maximum takeoff weights up to 543 kg (1,200 lb) and stall speeds not exceeding 39 knots (45 mph), along with a national registry managed through approved organizations to ensure compliance with design and operational standards. A key milestone in safety standardization occurred in 2004 when the FAA incorporated ASTM International consensus standards into its new light-sport aircraft (LSA) rule under 14 CFR §§ 1.1 and 21.190 et seq. and related guidance, allowing manufacturers to certify aircraft meeting ASTM F2245 (design and performance) and other specifications for weights up to 1,320 pounds (599 kg), bridging ultralight and general aviation categories while promoting verifiable airworthiness without full type certification. In 2025, the FAA finalized the Modernization of Special Airworthiness Certification (MOSAIC) rule, expanding LSA weight and power limits to further integrate with ultralight operations. In the 2020s, regulatory focus shifted toward integrating unmanned aircraft systems (drones) into ultralight-dominated low-altitude , with the FAA's 2021 Remote ID rule (14 CFR Part 89) requiring drones over 0.55 pounds (0.25 kg) to broadcast identification and location data, enabling safe coexistence in Class G shared by ultralights; as of November 2025, proposals for beyond-visual-line-of-sight (BVLOS) operations under Part 108 remain under review following an August 2025 NPRM, including altitude restrictions below 400 feet (122 m) and detect-and-avoid technologies to mitigate collision risks.

Definitions and Regulations

International Frameworks

The (FAI), established in 1905 as the global governing body for , plays a central role in defining and standardizing sport aviation classes, including microlight and ultralight categories, through its technical commissions and Sporting Code. The FAI's Microlight and Paramotor Commission (CIMA), formed in 1981, oversees the classification of microlights as lightweight, powered aircraft with one or two seats, a minimum speed below 83 km/h at maximum take-off weight (MTOW), and specific types such as fixed-wing, flex-wing, and autogyros. These definitions establish a baseline for international recognition, emphasizing low and recreational use, with MTOW limits up to 600 kg for two-seater landplanes in sporting contexts. The (ICAO) provides general airworthiness standards in Annex 8, which national authorities may adapt for , including ultralights, with simplified processes often applied nationally for vehicles under 600 kg MTOW to ensure basic safety without full commercial rigor. Complementing this, ICAO Annex 16 establishes harmonized certification standards for propeller-driven , applicable to ultralights through Chapter 10, which sets limits based on and power to minimize environmental impact during recreational operations. These frameworks promote airspace integration for ultralight flying by aligning with Annex 2 (Rules of the Air), allowing (VFR) operations in while requiring compliance with international traffic patterns to avoid conflicts with . In 2015, the FAI updated its Sporting Code Section 10 to incorporate provisions for electrically powered microlights, expanding definitions to include battery or hybrid propulsion systems while maintaining performance criteria for competitions and records. These updates facilitate global harmonization, as seen in international events like the FAI World Microlight Championships, held biennially since 1985, where pilots compete in navigation, economy, and precision tasks under unified rules to foster skill and safety in the discipline. As of 2025, EASA continues to promote harmonized standards for , including ultralights up to 600 kg MTOW, through ongoing regulatory reviews.

National Variations

In the United States, ultralight aviation is governed by (FAA) Part 103, which defines powered ultralight vehicles as having a maximum empty weight of 254 pounds (115 kg), a fuel capacity not exceeding 5 U.S. gallons, a maximum of 55 knots, and a power-off stall speed not exceeding 24 knots. These vehicles require no pilot certificate, medical certification, or registration, allowing operation solely for recreational or sport purposes in during daylight hours. Heavier variants exceeding these limits fall under the experimental amateur-built category, subject to FAA certification processes under 14 CFR Part 21, which impose airworthiness inspections and pilot licensing requirements. Australia's Civil Aviation Safety Authority (CASA) delegates oversight of microlight and ultralight operations to self-administering organizations like Recreational Aviation Australia (RAAus), which defines eligible aircraft as lightweight fixed-wing or weight-shift designs with a maximum takeoff weight (MTOW) up to 600 kg for two-seat models and lower limits for single-seat variants, such as under 300 kg for non-certified amateur-built types. Participation requires membership in an approved organization like RAAus, along with basic pilot training and competency assessments to ensure safe operation, though no formal medical certificate is mandated for recreational flying. Canada classifies ultralight aeroplanes through under basic ultra-light aeroplanes (BULA) and advanced ultra-light aeroplanes (AULA), with categories ranging from UL-1 (simple single-seat designs) to UL-6 (more complex two-seat models), all capped at a of approximately 550-560 kg (1,200-1,232 lbs) and stall speeds not exceeding 39 knots (45 mph). Pilots must hold an Ultra-light Pilot Permit, which includes a Category 4 for those over age 40 or with certain health conditions, and aircraft require registration and annual inspections by qualified personnel. In the , the British Microlight Aircraft Association (BMAA) and British and Paragliding Association (BHPA) administer regulations under (CAA) oversight, categorizing microlights into single-seat de-regulated (SSDR) types with MTOW limits of 300 kg (landplane) to 330 kg (amphibian) and two-seat models up to 450-600 kg depending on configuration and post-2021 light sport updates. These range from 85 kg empty weight for basic powered hang gliders to full microlight specifications, with pilots required to pass proficiency tests for a National Private Pilot's Licence (Microlight) without mandatory medicals for most recreational operations. New Zealand's Civil Aviation Authority (CAA) Part 103 closely mirrors the U.S. model by exempting simple microlights from full certification, defining them as with MTOW up to 600 kg for two seats or 405 kg empty weight equivalents, powered by engines not exceeding certain performance thresholds, and operable without a pilot license in some basic configurations. Unlike the U.S., however, all microlights mandate annual airworthiness inspections by licensed maintenance organizations or qualified individuals to verify compliance and safety. Across the , national variations persist despite efforts toward harmonization, such as the 2023 European Plan for (EPAS) and EASA opinions promoting uniform standards for operations, which aim to reduce discrepancies in and access for ultralights up to 600 kg MTOW. A key contrast with the U.S. is registration: voluntary and non-required for Part 103 ultralights there, while mandatory in the EU for all microlights, including airworthiness certificates and endorsements, to ensure traceability and compliance with EASA-aligned rules.
Country/RegionKey OrganizationMax Weight Limit (kg, MTOW unless noted)Pilot CertificationRegistration
FAAEmpty: 115 (single-seat); no fixed MTOWNone requiredVoluntary
AustraliaCASA/RAAus600 (two-seat)Basic training via organizationRequired via SAO
560 (two-seat AULA)Pilot Permit with medicalMandatory
United KingdomCAA/BMAA/BHPA300-600 (single to two-seat)Proficiency test (NPPL-M)Mandatory
CAA600 (two-seat)None for basic; permit for advancedMandatory with inspections
EASA (national implementation)Up to 600 (light sport variants)National licenseMandatory

Aircraft Design and Characteristics

Structural Features and Materials

Ultralight aircraft are engineered with minimalist structural designs to prioritize extreme lightness while ensuring sufficient rigidity and aerodynamic . The core framework typically consists of high-strength, low-weight tubing, often aluminum alloys such as 6061-T6, which forms the , wings, and tail assemblies in a "tube-and-fabric" configuration. This approach allows for quick assembly using welded or bolted joints, reducing overall mass without compromising the ability to withstand flight loads. High wings, commonly ranging from 6 to 10, are a hallmark feature, promoting lift by minimizing induced drag and enabling low-speed performance suitable for recreational flying. Early ultralight designs in the 1970s relied on natural materials like or wood spars combined with fabric coverings, as seen in pioneers such as the Weedhopper, to achieve empty weights typically under 115 kg while maintaining simplicity and cost-effectiveness. By the 1980s, aluminum tubing became dominant, exemplified by the Quicksilver series, offering better corrosion resistance and durability under repeated stress compared to wood, though still susceptible to fatigue in thin-walled sections. Post-2000 advancements introduced high-strength composites, including carbon fiber reinforced polymers, for frames and wing spars, as in the Belite Superlite, which provide superior strength-to-weight ratios—often 5 times that of aluminum—allowing empty weights to remain in the 100-115 kg range while enhancing rigidity against torsional loads. Wing and control surface coverings predominantly use lightweight polyester fabrics like Dacron (a branded ), stretched taut over the frame to form an airfoil shape, providing aerodynamic smoothness with minimal added weight—typically 0.1-0.2 kg per square meter. These fabrics must retain at least 70% of their original tensile strength (around 45-50 kg force) after UV exposure to ensure integrity. Structural design incorporates finite element analysis or simplified stress modeling to evaluate gust loads, targeting a safety factor of 1.5-2.0 for vertical gusts up to 15 m/s, preventing flutter or deformation in turbulent conditions. Instrumentation is kept minimal, often limited to basic indicators and altimeters, to avoid exceeding weight limits and maintain the focus on operations. Such features contribute to low stall speeds around 20-30 knots, enhancing short-field capabilities.

Performance and Weight Specifications

Ultralight aircraft are defined by stringent weight restrictions to ensure simplicity and accessibility. In the United States, under (FAA) Part 103 regulations, powered ultralights must have an empty weight of less than 254 pounds (115 kg), excluding floats and safety devices. capacity is limited to no more than 5 U.S. gallons (19 liters) to maintain the vehicle's lightweight nature and prevent extended operations. Internationally, regulations vary, but many jurisdictions align with a (MTOW) of 600 kg (1,323 pounds) for light sport or microlight categories, often allowing for two seats and basic instrumentation without full certification. Performance characteristics of ultralights emphasize low-speed handling and efficiency over high-speed capabilities. Typical cruise speeds range from 30 to 80 miles per hour (48 to 129 km/h), constrained by design priorities for short takeoffs and landings rather than endurance. Glide ratios generally fall between 10:1 and 15:1, enabling reasonable unpowered descent distances, though high-drag configurations can reduce this to 8:1 or lower in practice. Stall speeds are regulated to remain under 24 knots (28 mph or 44 km/h) power-off, facilitating operations from unprepared fields and minimizing landing risks. Key aerodynamic principles govern ultralight design, particularly wing sizing to achieve sufficient lift at low speeds. The lift equation, L=12ρv2SCLL = \frac{1}{2} \rho v^2 S C_L, where LL is lift, ρ\rho is , vv is , SS is wing area, and CLC_L is the , is fundamental; ultralights require larger wing areas (often 120-180 square feet) to generate adequate LL at velocities below 55 knots, balancing the low power available. Power-to-weight ratios typically range from 0.1 to 0.2 horsepower per pound, achieved with engines like the 40-hp , providing responsive climb rates of 500-1,000 feet per minute while adhering to weight limits. Operational ranges for ultralights are modest, usually 50-200 miles (80-322 km) per flight, influenced by the 5-gallon fuel limit and efficient two-stroke engines consuming 2-4 gallons per hour. Service ceilings extend to 10,000-14,000 feet (3,048-4,267 meters), allowing access to most uncontrolled airspace, though practical limits are lower due to engine performance at altitude.
ParameterTypical Value (US Part 103 Ultralight)Source
Empty Weight< 254 lbs (115 kg)FAA Part 103
Max Fuel5 US gallons (19 L)FAA AC 103-7
Cruise Speed30-80 mph (48-129 km/h)EAA Guidelines
Glide Ratio10:1 to 15:1Aviation Performance Data
Stall Speed< 24 knots (28 mph)FAA Regulations
Range50-200 miles (80-322 km)Manufacturer Specs (e.g., Aerolite 103)
Service Ceiling10,000-14,000 ft (3,048-4,267 m)Example: Quicksilver Models
Power-to-Weight0.1-0.2 hp/lbEngine-Airframe Matching (e.g., Rotax 503)

Types

Fixed-Wing Ultralights

Fixed-wing ultralights represent a category of rigid-wing aircraft characterized by fixed airfoils and conventional airplane-like structures, typically featuring monoplane configurations in either tractor or pusher propeller arrangements. These designs emphasize simplicity, low weight, and ease of construction to comply with ultralight regulations, such as the U.S. Federal Aviation Administration's Part 103, which limits empty weight to 254 pounds (115 kg) for single-seat models excluding floats and safety devices. Common configurations include high-wing monoplanes for enhanced stability and visibility, as well as canard layouts that place the horizontal stabilizer forward of the main wing to improve stall characteristics and control. Prominent subtypes include the Quicksilver MX, a high-wing with a strut-braced wing and open , designed for straightforward assembly and recreational flying. This model, produced by Quicksilver Aircraft, features a 28-foot and accommodates engines up to 50 horsepower, enabling cruise speeds around 54 mph while maintaining short takeoff distances suitable for grass strips. Another example is the Kolb Firestar, a pusher-propeller with a high-wing layout and side-by-side seating in its two-seat variant, prioritizing unobstructed forward visibility and compact storage. Developed by Kolb Aircraft, the Firestar's positions the propeller behind the pilot, reducing noise in the and enhancing propeller efficiency at low speeds. Propulsion in fixed-wing ultralights has historically relied on lightweight two-stroke engines, with the —a 50-horsepower, dual-ignition inline twin—serving as the dominant choice through the due to its reliability, , and widespread availability for kit builders. This , produced by BRP-Rotax, powered a significant portion of Part 103-compliant until its discontinuation in 2011, after which alternatives like the Hirth F-23 emerged, though two-strokes remained prevalent for their simplicity and cost-effectiveness in non-electric designs. Emerging electric adaptations, such as battery-powered motors, are gaining traction for reduced emissions but remain a minority in this category. Key design specifics include folding wings for easy transport and storage, allowing many models like the Kolb Firestar to fit within standard trailers without disassembly. This feature, often achieved via hinged wing roots and quick-release struts, facilitates trailering to remote flying sites and reduces requirements. Landing gear configurations vary between tricycle setups for easier ground handling and visibility during taxiing, as seen in models like the Aerolite 103, and taildragger arrangements for better clearance on rough terrain, common in bush-flying variants. In the United States, fixed-wing ultralights have seen substantial popularity. Kits for these aircraft typically range from $10,000 to $25,000, covering components and basic , making them accessible for homebuilders.

Flexible-Wing and Powered Parachutes

Flexible-wing ultralights represent a category of non-rigid designs that rely on weight-shift control and flexible canopies for flight, offering accessible entry into through their simplicity and low-speed handling characteristics. These vehicles, including hang gliders, weight-shift trikes, powered parachutes, and powered paragliders, utilize airfoil-shaped fabrics that inflate or maintain shape via airflow, enabling sustained flight with minimal structural rigidity compared to fixed- counterparts. Their emphasize stability and stall resistance, making them suitable for recreational soaring and short-distance travel. Weight-shift trikes, a popular subtype, feature a frame with a flexible (often derived from hang glider designs) mounted above a wheeled , allowing pilots to control direction by shifting body weight via control bars. Hang gliders exemplify unpowered flexible-wing designs, where pilots control the primarily through weight-shift via body movement suspended from a harness beneath the wing. This method alters the center of gravity to effect pitch and roll, with yaw managed by rudder-like inputs or differential drag from wingtip devices. Typical wingspans range from 9 to 10 meters, providing high aspect ratios for efficient glide ratios often exceeding 10:1 in modern models. In the ultralight context, hang gliders must weigh less than 155 pounds empty to qualify under FAR Part 103, facilitating recreational launches from slopes or tow systems without requiring pilot certification. Powered parachutes (PPCs) extend this concept by adding , featuring ram-air parachutes that inflate into semi-rigid airfoils through forward motion and cell openings connected by cross-ports. These canopies, often rectangular or elliptical with areas around 500 square feet, generate lift while exhibiting descent rates of 3-5 meters per second in power-off glides. PPCs are inherently stall-resistant due to the flexible canopy's ability to maintain a constant and deform gradually under aerodynamic loads, reducing the risk of abrupt stalls common in rigid-wing . Engines typically range from 20 to 50 horsepower in ultralight configurations, mounted in setups to drive propellers that enable takeoff rolls as short as 50-100 feet, depending on , , and surface conditions. Recreational use of PPCs surged post-1990s, driven by regulatory exemptions under FAR Part 103 and advancements in lightweight materials, leading to widespread adoption for leisure flying and . For light-sport variants, PPCs adhere to ASTM consensus standards, including those for airworthiness and , ensuring compliance beyond basic ultralight rules. Unlike fixed-wing ultralights, which achieve higher cruise speeds, flexible-wing types prioritize gentle handling and short-field performance for novice pilots.

Rotorcraft Ultralights

Rotorcraft ultralights, primarily or gyrocopters, use unpowered rotors for lift generated by , with a separate for forward . These designs comply with Part 103 limits, featuring empty weights under 254 pounds and single-seat configurations. Control is achieved through cyclic pitch variation on the rotor blades and for yaw, offering stable low-speed flight and vertical takeoff capabilities in some models. Popular examples include the , a simple frame with a rotor and pusher , suitable for homebuilding. Rotorcraft ultralights provide unique VTOL-like performance while maintaining the regulatory exemptions of other types.

Operations

Pilot Requirements and Training

In the United States, ultralight pilots operating under (FAA) Part 103 regulations are not required to hold a formal pilot license or medical certificate, as these vehicles are classified for recreational use without certification mandates. However, the FAA strongly recommends structured training to ensure safety, typically involving 10 to 15 hours of dual instruction with a qualified instructor before attempting solo flight, though experienced pilots may require as few as 7 hours. As of October 2025, the FAA's rule expands Sport Pilot privileges to include aircraft up to 1,320 pounds empty weight and 120 knots , potentially overlapping with some ultralight operations, though Part 103 vehicles remain exempt from certification. Internationally, requirements vary by country, often aligning with national aviation authorities rather than a unified FAI-issued Sport Pilot License, though the (FAI) provides frameworks for sporting activities. Many nations mandate a pilot permit or license equivalent for ultralights, including a medical examination to confirm fitness for flight and a minimum of 25 to 40 hours of logged , combining dual instruction and solo practice. For instance, in , an ultralight pilot permit requires at least 15 hours for single-seat operations or 25 hours for multi-seat, including both theoretical and practical assessments. Core training for ultralight pilots universally includes ground school covering essential topics such as —to interpret patterns affecting low-altitude flight—and , focusing on lift, drag, and stability in designs. Simulator-based practice is increasingly incorporated for handling emergencies like engine failure or recovery, allowing pilots to rehearse responses in a controlled environment without risk to or personnel. Organizations like the Ultralight Association (USUA) fill regulatory gaps by offering voluntary proficiency certificates through FAA-recognized training programs, which demonstrate competence in knowledge and flight skills without official licensing. In the 2020s, following the , there has been a marked shift toward online courses for ground school components, enabling remote access to modules on regulations, weather analysis, and emergency procedures to accommodate and broaden accessibility.

Flying Practices and Sites

Ultralight aviation operations are predominantly conducted in Class G airspace, the uncontrolled portion of the that exists below 1,200 feet above ground level (AGL) in much of the , allowing pilots unrestricted access without air traffic control clearance provided visibility and cloud clearance requirements are met. Pilots must avoid , including Class A, B, C, D, and surface areas of Class E, unless prior authorization is obtained from , and operations in prohibited or restricted areas require permission from the controlling agency. Additionally, ultralights cannot operate over congested areas, open-air assemblies, or in regions designated by Notices to Air Missions (NOTAMs) without appropriate waivers. All flights must maintain visual reference to the surface and yield right-of-way to other aircraft, emphasizing see-and-avoid practices. Routine flying practices prioritize safety through thorough pre-flight checks, which include inspecting the for structural integrity, verifying control surface movement, examining the and for damage, and confirming levels and quality. For foot-launch models like powered paragliders or hang gliders, takeoff involves hand-launching techniques where the pilot runs into the wind to generate sufficient airflow over the wing before becoming airborne, often requiring a clear, open area of at least 200-300 feet. Night flying is generally prohibited, with operations confined to the period between sunrise and sunset; limited twilight flights (up to 30 minutes before or after) are permitted only in if the vehicle is equipped with an anticollision light visible for at least three miles. Fuel management is a key consideration, as powered ultralights are limited to a maximum of five U.S. gallons, necessitating careful planning for short hops typically ranging from 30 to 100 miles to avoid mid-flight shortages. Suitable flying sites for ultralights include grass strips, beaches, and dedicated ultralight flightparks, which provide forgiving, unpaved surfaces that minimize damage risk during while complying with local land-use regulations. These locations must offer unobstructed approaches and sufficient length—often 300 to 500 feet—for safe operations, and pilots should verify permissions to avoid restricted or . Community fly-ins serve as popular venues, such as the annual EAA AirVenture in , where hundreds of ultralights gather for demonstrations, with dedicated areas for fixed-wing models, powered parachutes, and operating on grass runways during scheduled twilight and daytime slots. Events like the World Ultralight Fly-In also draw over 100 aircraft annually, fostering knowledge sharing and social interaction among pilots.

Safety and Incidents

Risk Factors and Mitigation

Ultralight aviation involves several inherent risk factors due to the vehicles' lightweight construction and lack of federal certification requirements under FAA Part 103. Structural failure often stems from poor maintenance or improper assembly, as operators are solely responsible for ensuring integrity without mandatory oversight. Weather sensitivity exacerbates these vulnerabilities, with ultralights particularly prone to , , and gusts that can lead to loss of control, given their and . Pilot error remains the predominant cause, accounting for 60-80% of accidents worldwide, often involving inadequate handling techniques or decision-making during takeoff, landing, or maneuvering. To mitigate these risks, operators are advised to conduct regular maintenance and inspections, following voluntary guidelines such as those from the (EAA), which recommend annual condition checks to identify fatigue, corrosion, or assembly issues. Many ultralights adhere to consensus standards for , which include provisions for structural inspections and performance verification to enhance safety. Human factors training is essential, emphasizing error prevention through awareness of fatigue, stress, and situational judgment, as promoted in FAA safety programs applicable to recreational flying. Additional safety measures include the integration of ballistic parachutes, widely adopted since the 1990s by manufacturers like BRS Aerospace, which have saved over 480 lives (as of 2025) by enabling whole-aircraft recovery during emergencies and potentially halving fatalities in deployable scenarios. Navigation aids such as GPS and 406 MHz Emergency Locator Transmitters (ELTs) improve and rescue response, transmitting precise locations to authorities in remote or off-airport operations. In the , ultralight pilots must maintain visual vigilance to see and avoid unmanned aircraft, which are limited to operations below 400 feet above ground level (AGL) and must yield right-of-way to manned aircraft, posing potential collision hazards in low-altitude flight. These mitigations, combined with preflight weather assessments, address the performance limits of ultralights, such as low stall speeds that amplify turbulence effects.

Notable Accidents and Statistics

Ultralight aviation exhibits a higher incidence of accidents compared to . Data from the (NTSB) and related studies indicate that ultralight and have an overall accident rate of approximately 5.5 to 29.8 per 100,000 flight hours, with fatal accident rates ranging from 5.2 per 100,000 flight hours for special and experimental light sport models, significantly exceeding the general aviation fatal rate of about 1.0 per 100,000 flight hours. In the United States, ultralight fatalities averaged around 60 per year during the , but NTSB records show a nominal decline in reported incidents from 2000 to 2010, with only 20 accidents documented in that period, reflecting improved practices and . NTSB data from 2011 to 2024 indicates an average of about 5 accidents per year, continuing the decline with fatalities averaging under 2 per year. Accident patterns in ultralight operations reveal that approximately 50% occur during phases, similar to broader trends but amplified by the vehicles' lightweight construction and limited performance margins. Globally, the (FAI) oversees microlight activities, with reports from member countries indicating over 300 incidents across the , , and alone from 2000 to 2010, underscoring a rate of several hundred per decade worldwide. Notable incidents illustrate the risks inherent in ultralight flight. In 1979, during testing of the experimental human-powered , multiple crashes occurred due to structural fragility, including a mid-air breakup that underscored the challenges of ultralight design limits. Another significant event was the July 3, 2015, crash of a Pegasus Quik microlight at Enstone Airfield in the UK, where the pilot and passenger suffered fatal injuries during a landing attempt, highlighting operational hazards in . These cases, alongside broader statistical trends, have informed ongoing safety enhancements in the sector.

References

  1. https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_103-6.pdf
  2. https://www.eaa.org/eaa/aviation-interests/ultralights
  3. https://www.eaa.org/eaa/aviation-interests/ultralights/getting-started-in-ultralight-flying/about-faa-part-103-for-ultralights
  4. https://tc.canada.ca/en/aviation/publications/aviation-safety-letter/issue-4-2023/best-practices-transitioning-ultralight-aeroplane
  5. https://www.faa.gov/newsroom/MOSAIC_Final_Rule_Issuance.pdf
  6. https://www.lilienthal-museum.de/olma/esoest.htm
  7. https://hartzellprop.com/aviation-pioneers-otto-lilienthal/
  8. https://lemelson.mit.edu/resources/francis-and-gertrude-rogallo
  9. http://kitehistory.com/Miscellaneous/rogallo.htm
  10. https://www.smithsonianmag.com/air-space-magazine/rise-and-fall-of-hang-gliding-180972601/
  11. https://www.ushpa.org/magazine
  12. https://www.bmaa.org/the-bmaa/bmaa-history/bmaa-history-1970---1976
  13. https://airandspace.si.edu/exhibitions/ultralight-aircraft
  14. https://www.ulav8r.com/weedhopper_history.htm
  15. https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-103
  16. https://tc.canada.ca/en/corporate-services/acts-regulations/list-regulations/canadian-aviation-regulations-sor-96-433/standards/airworthiness-manual-chapter-523-vla-very-light-aeroplanes-canadian-aviation-regulations-cars
  17. https://www.easa.europa.eu/en/document-library/certification-specifications/group/cs-vla-very-light-aeroplanes
  18. https://upac.ca/light-aircraft-manufacturers-of-canada-lamac/
  19. https://www.raa.asn.au/about/history
  20. https://www.federalregister.gov/documents/2004/07/27/04-16577/certification-of-aircraft-and-airmen-for-the-operation-of-light-sport-aircraft
  21. https://www.faa.gov/aircraft/gen_av/light_sport/StandardsChart
  22. https://www.faa.gov/uas/resources/policy_library/Drone-Integration-Concept-of-Operations-May-2025.pdf
  23. https://www.federalregister.gov/documents/2025/08/07/2025-14992/normalizing-unmanned-aircraft-systems-beyond-visual-line-of-sight-operations
  24. https://www.fai.org/page/cima-microlights
  25. https://www.fai.org/sites/default/files/documents/s10_-_2023.pdf
  26. https://www.icao.int/environmental-protection/reduction-noise-source
  27. https://www.fai.org/sites/default/files/documents/s_10_2015-3.pdf
  28. https://www.easa.europa.eu/en/the-agency/faqs/light-sport-aircraft
  29. https://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentID/22640
  30. https://www.casa.gov.au/aircraft/sport-aviation/types-sport-aircraft-and-activities
  31. https://tc.canada.ca/en/aviation/aircraft-airworthiness/recreational-aircraft-airworthiness
  32. https://tc.canada.ca/en/aviation/publications/aviation-safety-letter/issue-4-2019/ultralight-flying-safety-begins-you
  33. https://www.bmaa.org/about-microlighting/exactly-what-is-a-microlight-
  34. https://www.caa.co.uk/general-aviation/aircraft-ownership-and-maintenance/types-of-aircraft/microlights/
  35. https://www.aviation.govt.nz/assets/rules/advisory-circulars/ac103-1.pdf
  36. https://www.aviation.govt.nz/rules/rule-part/part-103/subpart-g/
  37. https://www.kitplanes.com/design-process-span-and-aspect-ratio/
  38. https://www.lightwings.eu/2024/01/23/100-years-in-the-making-history-of-ultralight-aviation/
  39. https://inspire.eaa.org/2019/05/01/the-matter-of-materials-the-pros-and-cons-of-wood-steel-aluminum-and-composites/
  40. https://www.kitplanes.com/flight-review-return-of-the-ultralight/
  41. https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_103-7.pdf
  42. https://www.aopa.org/news-and-media/all-news/2019/april/11/aero-day-two
  43. https://www.footflyer.com/comparing-ultralights-ppc-ppg-hg-httrike-3axis/
  44. https://pilotinstitute.com/what-is-an-ultralight-airplane-faa-definition-and-examples/
  45. https://www.quicksilveraircraft.com/MX-SPORT-Spec.php
  46. https://www.uflyit.com/aerolite_103_specifications.htm
  47. https://planesoffame.org/aircraft/plane-Mini-Max-1600R
  48. https://www.quicksilveraircraft.com/MX103-Spec1.php
  49. http://avidfoxflyers.com/index.php?/topic/2147-what-will-replace-the-rotax-447-and-503/
  50. https://www.kolbaircraft.com/
  51. https://flying411.com/blog-details.php?id=89&slug=best-ultralight-aircrafts
  52. https://epicflightacademy.com/ultralight-aircraft/
  53. https://www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/powered_parachute_handbook.pdf
  54. https://www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/glider_handbook/faa-h-8083-13a.pdf
  55. http://arc.aiaa.org/doi/pdfplus/10.2514/6.2003-2777
  56. https://usppa.org/far-part-103-ultralight-vehicles/
  57. https://www.easyflight.com/
  58. https://www.usua.org/
  59. https://www.faa.gov/sites/faa.gov/files/2022-07/StandardsChart.pdf
  60. https://www.eaa.org/eaa/aviation-interests/ultralights/about-ultralight-flying/types-of-ultralights
  61. https://www.faa.gov/faq/do-i-need-pilot-license-certificate-fly-ultralights
  62. https://www.usua.org/Rules/ruleandregs.htm
  63. https://www.quicksilveraircraft.com/Flight_School.php
  64. https://www.fai.org/page/cig-certificates-proficiency
  65. https://upac.ca/what-is-fai/
  66. https://tc.canada.ca/en/corporate-services/acts-regulations/list-regulations/canadian-aviation-regulations-sor-96-433/standards/standard-421-flight-crew-permits-licences-ratings-canadian-aviation-regulations-cars
  67. https://www.facebook.com/groups/360200414607445/posts/589223208371830/
  68. https://realsimgear.com/blogs/news/practicing-emergencies-with-flight-simulators
  69. https://sportpilottraining.sportaviationcenter.com/ultralight-pilot/
  70. https://www.ainonline.com/aviation-news/business-aviation/2020-07-01/training-providers-prepare-post-covid-future
  71. https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap3_section_3.html
  72. https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-103/subpart-B/section-103.17
  73. https://www.eaa.org/~/media/files/eaa/aviationinterests/ultralights/fixed_wing_training.pdf
  74. https://eaaforums.org/archive/index.php/t-2714.html
  75. https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-103/subpart-B/section-103.11
  76. https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-103/subpart-A/section-103.1
  77. https://www.faa.gov/airports/airport_compliance/compliance_guidance/cgl-2023-01-aircraft-ops-on-unpaved-areas
  78. https://www.quora.com/Can-ultra-light-aircraft-take-off-and-land-anywhere-they-want-or-do-they-have-a-flight-plan
  79. https://www.eaa.org/airventure/features-and-attractions/aircraft-areas/ultralights-lsa-and-homebuilt-rotorcraft
  80. https://www.aero-news.net/index.cfm?do=main.textpost&id=5820BC8A-2274-4238-9143-D22F6E870391
  81. https://www.ntsb.gov/safety/safety-studies/Documents/SS8501.pdf
  82. https://www.spaglaw.com/blog/2024/01/understanding-the-risks-causes-of-ultralight-aircraft-crashes-at-low-elevations/
  83. https://www.mdpi.com/2313-576X/10/3/77
  84. https://www.eaa.org/Videos/Ultralight-Aircraft/6298826900001
  85. https://www.faasafety.gov/gslac/ALC/course_catalog.aspx?view=otherCat&categoryId=4
  86. https://brsaerospace.com/
  87. https://www.aopa.org/advocacy/aircraft/aircraft-operations/emergency-locator-transmitters
  88. https://www.flyingmag.com/guide-to-drone-collision-avoidance-for-pilots/
  89. http://adventuresportaircraft.com/html/safety.html
  90. https://pubmed.ncbi.nlm.nih.gov/27503046/
  91. https://www.ntsb.gov/safety/safety-studies/Pages/SS1201.aspx
  92. https://pubmed.ncbi.nlm.nih.gov/3573093/
  93. https://www.mdpi.com/2313-576X/4/2/23
  94. https://www.ntsb.gov/Pages/AviationQueryv2.aspx
  95. https://www.aopa.org/training-and-safety/air-safety-institute/accident-analysis/joseph-t-nall-report
  96. https://www.donaldmonroe.com/new_gallery.html
  97. https://asn.flightsafety.org/wikibase/177559
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