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XV-4 Hummingbird
| XV-4 Hummingbird | |
|---|---|
| First prototype XV-4 Hummingbird | |
| Type | VTOL |
| Manufacturer | Lockheed |
| Maiden flight | 7 July 1962 |
| Status | Retired |
| Primary user | United States Army |
| Number built | 2 |
The Lockheed XV-4 Hummingbird (originally designated VZ-10) was a U.S. Army project in the 1960s, one of many attempts to produce a V/STOL vertical take off / landing jet. At a design speed of 336 mph, the Hummingbird was slower than some propeller-powered transports.
The design used doors at the top and bottom of the fuselage intended to augment thrust ejected into this area with cold air. In theory, a 11,607 lb aircraft could be lifted by a 6,600 lbf engine. Unfortunately, performance was far below the estimates only 1.04 thrust-to-weight in practice and the prototype crashed on 10 June 1964, killing the pilot. The second aircraft was converted to lift jets instead, also crashing after several tests.
Rockwell's XFV-12 would be even less successful at venting cold air to augment thrust through the wings. The Lockheed F-35 Joint Strike Fighter would later employ a shaft-driven lift fan, also located in the fuselage and drawing on the lessons of the Hummingbird.
None of the early American V/STOL designs would result in a production plane. The British Hawker Siddeley Harrier used vectoring nozzles, while the Russian Yakovlev Yak-38 Forger attack jet used lift jets in conjunction with rotating rear nozzles.
Specifications (first prototype)
This aircraft article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.General characteristics
- Length: 32 ft (10.3 m)
- Wingspan: 26 ft (7.9 m)
- Height: 11 ft 8 in (3.58 m)
- Loaded weight: 11,607 lb ()
- Powerplant: 2× Pratt & Whitney JT12A turbojets, 3,300 lbf () each
Performance
- Maximum speed: 336 mph (541km/h)
See also
Comparable aircraft
Related lists
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
References
- X-Planes and Prototypes by Jim Winchester
- Lockheed VZ-10 Hummingbird/XV-4
- VSTOL.org Wheel
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Fighters: F-22 Raptor · F-35 Lightning II · F-94 Starfire · F-104 Starfighter · F-117 Nighthawk · P-38 Lightning · P-80 Shooting Star · T-33 Shooting Star
Patrol and reconnaissance : Hudson · PV-1 Ventura · PV-2 Harpoon · P-2 Neptune · P-3 Orion · CP-140 Aurora/CP-140A Arcturus · U-2 · SR-71 Blackbird · S-3 Viking
Template:US Army VTOL Template:US STOL and VTOL aircraft
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
| This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "XV-4 Hummingbird". |
