This post reminded me of the Bell XP-59, an aircraft that was developed during WWII. If you just do a raw Google Image Search, the pictures you’ll find will be of a radically different aircraft than the one pictured above. Usually the confusion is carefully avoided, but the United States Army Air Force made a deliberate exception in order to disguise the top-secret development of a jet aircraft they hope would out-perform other nation’s similar efforts. Unfortunately, that aircraft turned out to be a disappointment. Oddly enough, they might’ve had a suitable ready-made jet aircraft if they had adapted the original name holder.
Topshot from Thomas “Tommy” Thompson’s U.S. Navy Aircraft History blog
In the late 1930s the Bell Aircraft Company conducted a study that the USAAF designated the XP-52. It was for a single-seat fighter/interceptor aircraft with an unusual configuration - the propeller would be behind the fuselage, tucked in between two booms that held the aircraft’s rear control surfaces, similar to a Lockheed P-38 Lightning but with half the engines. The wings were broad and lightly swept, not entirely an unusual configuration of the time (the most popular airline of the day, the Douglas DC-3 has a similar wing planform). But perhaps the most unusual feature of the aircraft was the large hole running right through the center, giving the plane a giant gaping maw like a fish swimming through the air. This was to be an air inlet for the water-cooled engine’s radiator. The XP-52 went nowhere for reasons that I have not been able to clarify, but the design was refined into the XP-59 that retained the same disgintuishing features.
Artist’s depiction of the original XP-52 design study, from /k/ planes
The XP-59 was shopped to the Navy who was interested in using it from their aircraft carriers, but selected Grumman’s G51 design instead, later adopted as the F7F Tigercat, an exceptionally powerful combat aircraft for its day (albeit quickly supplanted by jets). The XP-59 was likely rejected because the rear counter-rotating propeller arrangement made striking carrier decks a far too frequent possibility. The XP-59 was also rejected by the USAAF, likely because of the prevailing attitude at the time of preferring designs that were already in production and thus guaranteed readily available to fight Hitler and Tojo (the top brass had been paralized into fear from Hitler’s successful Blitzkreig across Europe, concluding that they needed to produce aircraft as fast as possible to provide an effective counter). By the time this fear subsided, jet designs that would eventually become the F-86 Sabre and F9F Panther were already being prototyped, and the handwriting was on the wall for propeller aircraft. In fact, the designation XP-59 would later be reused to mask Bell’s own jet aircraft development.
Unfortunately, the aircraft that would actually fly as the XP-59, or the “Airacomet,” proved to be an absolute dog of an airplane. Although mass-production ready, the USAAF wasn’t convinced it would’ve provided the necessary performance improvement over the existing P-38s, P-47s and P-51s that were ripping the Luftwaffe to shreds, Hitler’s “Wunderwaffe” Me-262 jet included. The USAAF ordered basically just enough P-59s to provide experimentation and data to develop more effective fighter aircraft and to provide the training necessary to teach pilots how to operate a jet-powered aircraft.
A viable jet aircraft design may have been staring at them in the face all along, with the design that bore the original XP-59 designation. The unique radiator-in-the-nose design already made the plane reminiscient of the F-86 and MiG-15 jets that would duke it out over Korea. The podded, stubby fuselage was accidentally already suitable for the Sir Frank Whittle-designed centrifugal-flow jet engines, something the British would demonstrate on their later deHavilland single-engine jet fighters. One has to wonder if they had merely dumped the original piston engine and put a jet in its place ala what SAAB had done with their J-21 jet fighter. At the very least, it couldn’t have been any worse than the rather uninspired Airacomet.