"ttyymmnn" (ttyymmnn)
11/01/2017 at 12:35 • Filed to: wingspan, Planelopnik, planes you've (probably) never heard of
7
6|
"ttyymmnn" (ttyymmnn)
11/01/2017 at 12:35 • Filed to: wingspan, Planelopnik, planes you've (probably) never heard of | 7
| 6 |
Fearing that American aircraft development was stagnating in the face of technological advances made overseas, the US Army Air Corps issued Request for Data R-40C in 1940 which the Army hoped would encourage designers to create innovative new aircraft that went beyond the traditional monoplane with engine in front arrangement that had become standard during the 1930s. Three aircraft came out of this request: the Vultee XP-54, the Curtiss XP-55 Ascender, and the radical Northrop XP-56 Black Bullet.
!!! UNKNOWN CONTENT TYPE !!!
This is the third installment in a three-part series that takes a look at the Request for Data R-40C aircraft.
!!! UNKNOWN CONTENT TYPE !!!
(San Diego Air and Space Museum)
The final submission in the R-40C request for data, the Northrop XP-56 was, by far the most radical of the three. While the !!!error: Indecipherable SUB-paragraph formatting!!! had mimicked a flying wing but with a long fuselage, the stubby little XP-56, nicknamed the Black Bullet for obvious reasons, was true flying wing, albeit with a short bullet-shaped fuselage, with wings that were swept slightly and fitted with anhedral wingtips. In order to prove the airworthiness of the flying wing concept, Northrop had built and flown the !!!error: Indecipherable SUB-paragraph formatting!!! , a small proof of concept aircraft that Northrop had flown in 1940 as part of their research into the viability of the flying wing design. Following the successful flight of the N-1M, the Army gave its approval to build the XP-56.
(San Diego Air and Space Museum)
Like the other R-40C aircraft, Northrop had planned to use the !!!error: Indecipherable SUB-paragraph formatting!!! engine, but they too were stymied when that engine program was canceled. Instead, they chose a !!!error: Indecipherable SUB-paragraph formatting!!! radial which turned a set of contra-rotating pusher propellers. The R2800 actually provided more horsepower, but the redesign of the fuselage resulted in a five-month delay in the project. The Black Bullet was also one of the first aircraft to be built from magnesium due to fears of a potential shortage of aircraft aluminum due to the war effort. Due to the difficulty of welding the exotic metal, Northrop developed a new !!!error: Indecipherable SUB-paragraph formatting!!! method of welding, and patented a number of the tools used in the process.
The second XP-56 prototype. Note the enlarged vertical stabilizer. (San Diego Air and Space Museum)
Upon completion of the first airframe in April 1943, ground testing began, but a serious yaw problem was soon discovered. Northrop traced this to the braking system, and once that was solved, the Black Bullet finally took to the air on September 30, 1943. Starting with flights barely above the ground to test the controls, the XP-56 gradually flew higher and higher in successive test flights, but a taxiing crash destroyed the first prototype before its true potential could be determined. The second prototype tried to address some of the control difficulties found in the first, notably through the addition of a dorsal vertical stabilizer that mirrored the ventral stabilizer. The center of gravity was also adjusted. Still, flight testing proved disappointing, and with the advent of more advanced jet fighters, the program was canceled. The second prototype of the XP-56 is in storage at the National Air and Space Museum where it awaits restoration.
!!! UNKNOWN CONTENT TYPE !!!
Connecting Flights
!!! UNKNOWN CONTENT TYPE !!!
http://oppositelock.kinja.com/airplane-tales-request-for-data-r-40c-the-curtiss-xp-1818847071
http://oppositelock.kinja.com/airplane-tales-request-for-data-r-40c-the-vultee-xp-1818819619
http://oppositelock.kinja.com/this-date-in-aviation-history-october-28-october-31-1818626093
!!! UNKNOWN CONTENT TYPE !!!
If you enjoyed this post, please join in the conversation and let me know. For more posts about aviation history and aircraft oddities, head over to !!!error: Indecipherable SUB-paragraph formatting!!! .
!!! UNKNOWN CONTENT TYPE !!!
user314
> ttyymmnn
11/01/2017 at 12:55 |
|
Hmm, a Northrop flying wing with a contra-rotating pusher prop and stability issues? That sounds familiar ....
|
ttyymmnn
> user314
11/01/2017 at 13:02 |
|
Northrop’s gonna Northrop.
X37.9XXS
> ttyymmnn
11/01/2017 at 13:53 |
|
Damn physics
Always getting in the way of cool aeroschines
|
ttyymmnn
> X37.9XXS
11/01/2017 at 14:15 |
|
It would be nice if the rules didn’t apply. What a/c is that?
|
user314
> ttyymmnn
11/01/2017 at 14:45 |
|
SNCASO (Sud-Ouest) Trident , a mixed-engine interceptor prototype from the early Fifties.
|
ttyymmnn
> user314
11/01/2017 at 14:48 |
|
Thanks!