GT-1 | |
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Type | Air-to-surface missile |
Place of origin | United States |
Service history | |
In service | 1944-1945 |
Used by | United States Army Air Forces |
Production history | |
Designed | 1942-1943 |
Manufacturer | Aeronca |
Specifications | |
Wingspan | 12 feet (3.7 m) |
Warhead | Mk 13 Mod 2A aerial torpedo |
Warhead weight | 600 pounds (270 kg) explosive |
Engine | None |
Operational range | 25 miles (40 km) |
Maximum speed | 260 miles per hour (420 km/h) |
Guidance system | Preset plus paravane |
Launch platform | B-25 Mitchell |
The GT-1 (Glide Torpedo 1) was an early form of stand-off weaponry developed by the United States Army Air Forces during World War II. Intended to deliver an aerial torpedo at a safe range from the launching aircraft, the weapon proved successful enough in testing to be approved for operational use, and the GT-1 saw limited use in the closing stages of the war.
The GT-1 was derived from the GB-1 series of glide bombs, developed by Aeronca for the United States Army Air Forces. [1] The weapon's airframe was inexpensive and simply designed, with a basic wing and twin tails attached to a cradle for carrying the payload. [1] The flight path of the GT-1 was determined by a preset autopilot that kept the weapon on a steady course after release. [1]
The GT-1 was usually released from its carrier aircraft at an altitude of 10,000 feet (3,000 m); this provided a standoff range of as much as 25 miles (40 km) under ideal conditions. [2] [3] The GT-1's warload consisted of a Mark 13 Mod 2A aerial torpedo. The GT-1 was fitted with a paravane, trailing 20 feet (6.1 m) below the main body of the craft; upon the paravane's striking the surface of the water, explosive bolts would fire to release the torpedo, which would then execute a preset search pattern to locate and destroy its target. [1] [2]
Initially tested during 1943, [1] [4] the GT-1 proved to be successful, [5] and was issued to a single operational unit for service. [6] Launched from North American B-25 Mitchell bombers, [1] [7] the GT-1 saw brief operational service late in the war; [1] [4] three missions are known to have been flown using the weapon from Okinawa in late 1945. [7] On one mission, against Kagoshima, eleven of thirteen GT-1s launched successfully entered the water; three hits were recorded, against a fleet carrier, a light carrier, and a freighter. [7] The Boeing B-17 Flying Fortress was also capable of carrying the GT-1. [3]
Following the end of World War II, the aerial torpedo rapidly fell out of favor as a weapon of war against surface ships[ citation needed ], and the 'GT' category of weapons was abolished in 1947. [8]
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External videos | |
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Preset Glide Torpedo Model GT-1 |