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Kool kitty, you're right with the vampire, for some reason I'd remembered it as first flying in '45.
Regarding the Horten though, improved engines or not, the pilot would still be deaf in a week, I reckon!
KrisWhile the XP-47 program was underway, Republic engineers were looking to improve the performance of the P-43. The result was a contract to develop the lightweight XP-44. Based upon the P-43 airframe, Republic planned to install the Pratt Whitney R-2180 engine in a reworked Lancer. However, this powerplant did not produce the expected horsepower and the design team upgraded to the Wright R-2600. This engine made a reliable 1,600 hp. Yet, it proved to be unsuitable for turbo-supercharging. Finally, good fortune smiled on the XP-44 in the form of the P&W R-2800 Double Wasp. With a contract for 80 examples in hand, Republic set out to modify a P-43 airframe to take the new powerhouse 18 cylinder engine.
To understand how important the R-2800 engine was to become, it is essential to know that many of America�s best fighters and bombers of WWII were powered by this redoubtable engine. These include, but is not limited to, the P-47 Thunderbolt, the F4U Corsair, the F6F Hellcat and the B-26 and A-26 bombers. The R-2800 that was to be fitted to the XP-44 produced 1,850 hp. Later variants used in the P-47M and P-47N produced as much as 2,800 and considerably more (up to 3,600 hp) on dynamometers.
Slowly, but steadily, work progressed on the XP-44 mock-up, now known by some at Farmingdale as the 'Rocket' (an earlier design concept by Republic, the AP-10, was also called the Rocket) Performance projections were impressive. A maximum speed of 402 mph was expected at 20,000 feet. Climb rate should approach, or even exceed 4,000 ft/min. Armament was to consist of four.50 caliber Browning machine guns, two mounted above the engine and one installed in each wing. Fuel capacity was no greater than the P-43. With the increased thirst of the far larger R-2800 engine, range would be limited. There is little doubt, however, that the P-44 would have been an effective interceptor.
Unfortunately, the Air Corps did not need a short range interceptor. Indeed, as data from the European war was analyzed, it was becoming very clear that a fighter of far greater capability was going to be needed. The need to fly even faster, at greater altitudes, over longer distances was now evident. The Experimental Aircraft Division of the USAAC called in Kartveli and informed him that the XP-44 contract was cancelled. So was the XP-47 lightweight fighter contract. They had drawn up a new set of requirements and authorized a new contract to design and develop a new fighter that would be designated the XP-47B.