Seversky AP-2 XP-41

09/30/2010. Remarks by Johan Visschedijk: "When, in 1936, the USAAC Materiel Division placed an order for the SEV-1XP as the P-35, it had stipulated that the 77th and last series aircraft be fitted with a more powerful supercharged engine. The chosen engine was the Pratt & Whitney R-1830-19 of 1,200 hp, fitted with an integral medium-altitude two-stage mechanical supercharger.

A contractual modification enabled Seversky to complete the airframe to a standard similar to that of the private venture AP-4. The AP-9 was, in fact, used for competitive evaluation at Dayton in lieu of the XP-41 until the latter became available. Power plant apart, the aircraft was in virtually all respects similar to the AP-4.

The XP-41 was delivered to Wright Field for USAAC evaluation in February 1939, but the Air Corps preferred the turbocharged AP-4 and further development of the XP-41 was discontinued, although trials continued at Langley. This was the last of the Kartveli-designed fighters to bear the Seversky appellation, as the company thereafter became the Republic Aviation Corporation."