Curtiss XP-P40Q Warhawk - Was a Modification with a V-1710-121 Engine with Water Injection, Two Speed Supercharger, 4-Bladed Prop, Cut-Down Rear Fuselage and Bubble Canopy, Squared Off Wingtips and Tail Surfaces, was Tested, but its Performance, Thou Better, was Not Enough of an Improvement to Merit Production (1)
A not so well known aircraft. The Douglas B-18 Bolo was an American medium bomber which served with the United States Army Air Corps and the Royal Canadian Air Force (as the Digby) during the late 1930s and early 1940s. The Bolo was built by the Douglas Aircraft Company, based on its DC-2, and was developed to replace the Martin B-10.
The Lockheed Martin SR-72 is a conceptualized unmanned, hypersonic speed aircraft intended for intelligence, surveillance and reconnaissance proposed by Lockheed Martin to succeed the retired Lockheed SR-71 Blackbird.