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Kaman SH-2 Seasprite
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Kaman SH-2 Seasprite
The Kaman SH-2 Seasprite is a ship-based helicopter originally developed and produced by American manufacturer Kaman Aircraft Corporation. It has been typically used as a compact and fast-moving rotorcraft for utility and anti-submarine warfare (ASW) missions. Early on it was a modest sized single-engined naval utility helicopter, and progressed to twin-engine ASW and SAR, and the latest model served well into the 21st century, with the G model in active service in the 2020s with Egypt, New Zealand, Peru, and Poland.
The Seasprite, with the internal Kaman designation K-20, was developed in the late 1950s in response to a United States Navy (USN) requirement for a suitably fast and compact naval utility helicopter. The USN found the Seasprite attractive, and ordered four prototypes and an initial batch of 12 production helicopters as the HU2K-1. Under the 1962 United States Tri-Service aircraft designation system, the HU2K and HU2K-1 were re-designated as H-2 and UH-2A respectively. Kaman also pursued foreign sales; after showing interest, the Royal Canadian Navy (RCN) rejected the Seasprite due to an unexpected price increase and underperformance during sea trials. The USN addressed the poor performance by converting the single-engine Seasprites into a more powerful twin-engine configuration from 1968.
In October 1970, the USN selected the Seasprite as the interim Light Airborne Multi-Purpose System (LAMPS) helicopter, resulting in the SH-2D/F variant with enhanced ASW and anti-surface warfare sensors. Most UH-2s were converted into SH-2Fs.
USN Seasprites were used for ASW, search and rescue (SAR), utility and plane guard for aircraft carriers. In the Vietnam War they were mainly used for combat search and rescue (CSAR), and combat support and surface warfare during the Gulf War. The SH-2G Super Seasprite was the last variant and—in 2001—the last Seasprite to leave USN service. Retired USN Seasprites were offered as foreign aid in the 1990s and 2000s; this led to quite some interest and F and/or G models served with New Zealand, Poland, and Egypt. Retired models were also sent to aviation museums, and a number have been put on display. However, the latest upgraded models are still in frontline service with several navies around the world.
In 1956, the USN launched a competition for a compact, all-weather multipurpose naval helicopter, and encouraged submissions from private companies. Kaman responded with its K-20 design, a relatively conventional helicopter with a General Electric T58-8F turboshaft engine driving a 44-foot four-bladed main rotor and a four-bladed tail rotor. Kaman won the competition and was awarded a contract to construct four prototypes and an initial batch of 12 production helicopters, designated as the HU2K-1.
In 1960, the HU2K was the RCN's preferred option for its ASW helicopter program, and the Government of Canada approved the purchase of 12 Seasprites for $14.5 million. However, the purchase was disrupted by Kaman suddenly raising the price to $23 million, and concerns that the helicopter's designed weight and performance criteria were overoptimistic. The RCN delayed making a decision until after the USN sea trials which confirmed that the HU2K was overweight and underpowered for their needs. In late-1961, Canada selected the competing Sikorsky CH-124 Sea King instead.
In the late-1960s, without further orders Kaman decided to terminate production after completing the USN order of 184 H-2s. However, in 1971, production was restarted for the improved SH-2F to operate from older frigates. This ability meant it stayed in service to the end of the century, as even with the introduction of the newer, larger and overall more capable Sikorsky SH-60 Sea Hawk which entered service starting in the mid-1980s, but it could not operate safety from the smaller flight decks like the smaller Seasprite.
The HU2K-1 and HU2K-1U were re-designated as the UH-2A and UH-2B respectively under the 1962 United States Tri-Service aircraft designation system. The Seasprite continued to receive modifications and improvements, including external stores mounts. Beginning in 1968, the USN's remaining UH-2s underwent a major conversion into a more powerful two-engine configuration.
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Kaman SH-2 Seasprite
The Kaman SH-2 Seasprite is a ship-based helicopter originally developed and produced by American manufacturer Kaman Aircraft Corporation. It has been typically used as a compact and fast-moving rotorcraft for utility and anti-submarine warfare (ASW) missions. Early on it was a modest sized single-engined naval utility helicopter, and progressed to twin-engine ASW and SAR, and the latest model served well into the 21st century, with the G model in active service in the 2020s with Egypt, New Zealand, Peru, and Poland.
The Seasprite, with the internal Kaman designation K-20, was developed in the late 1950s in response to a United States Navy (USN) requirement for a suitably fast and compact naval utility helicopter. The USN found the Seasprite attractive, and ordered four prototypes and an initial batch of 12 production helicopters as the HU2K-1. Under the 1962 United States Tri-Service aircraft designation system, the HU2K and HU2K-1 were re-designated as H-2 and UH-2A respectively. Kaman also pursued foreign sales; after showing interest, the Royal Canadian Navy (RCN) rejected the Seasprite due to an unexpected price increase and underperformance during sea trials. The USN addressed the poor performance by converting the single-engine Seasprites into a more powerful twin-engine configuration from 1968.
In October 1970, the USN selected the Seasprite as the interim Light Airborne Multi-Purpose System (LAMPS) helicopter, resulting in the SH-2D/F variant with enhanced ASW and anti-surface warfare sensors. Most UH-2s were converted into SH-2Fs.
USN Seasprites were used for ASW, search and rescue (SAR), utility and plane guard for aircraft carriers. In the Vietnam War they were mainly used for combat search and rescue (CSAR), and combat support and surface warfare during the Gulf War. The SH-2G Super Seasprite was the last variant and—in 2001—the last Seasprite to leave USN service. Retired USN Seasprites were offered as foreign aid in the 1990s and 2000s; this led to quite some interest and F and/or G models served with New Zealand, Poland, and Egypt. Retired models were also sent to aviation museums, and a number have been put on display. However, the latest upgraded models are still in frontline service with several navies around the world.
In 1956, the USN launched a competition for a compact, all-weather multipurpose naval helicopter, and encouraged submissions from private companies. Kaman responded with its K-20 design, a relatively conventional helicopter with a General Electric T58-8F turboshaft engine driving a 44-foot four-bladed main rotor and a four-bladed tail rotor. Kaman won the competition and was awarded a contract to construct four prototypes and an initial batch of 12 production helicopters, designated as the HU2K-1.
In 1960, the HU2K was the RCN's preferred option for its ASW helicopter program, and the Government of Canada approved the purchase of 12 Seasprites for $14.5 million. However, the purchase was disrupted by Kaman suddenly raising the price to $23 million, and concerns that the helicopter's designed weight and performance criteria were overoptimistic. The RCN delayed making a decision until after the USN sea trials which confirmed that the HU2K was overweight and underpowered for their needs. In late-1961, Canada selected the competing Sikorsky CH-124 Sea King instead.
In the late-1960s, without further orders Kaman decided to terminate production after completing the USN order of 184 H-2s. However, in 1971, production was restarted for the improved SH-2F to operate from older frigates. This ability meant it stayed in service to the end of the century, as even with the introduction of the newer, larger and overall more capable Sikorsky SH-60 Sea Hawk which entered service starting in the mid-1980s, but it could not operate safety from the smaller flight decks like the smaller Seasprite.
The HU2K-1 and HU2K-1U were re-designated as the UH-2A and UH-2B respectively under the 1962 United States Tri-Service aircraft designation system. The Seasprite continued to receive modifications and improvements, including external stores mounts. Beginning in 1968, the USN's remaining UH-2s underwent a major conversion into a more powerful two-engine configuration.
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