 The new engine (the ORM-65) had been originally designed for a use in a single-launch cruise missile, but was adapted so that it could be employed in a multi-use aircraft.For comparison to the OR-2, the new ORM-65 could produce a variable thrust between .After extensive testing, on February 28, 1940, the new RP-318-1 was successfully tested in a full-powered flight; the craft attained a speed of , reached an altitude of , in 110 seconds of operation, and was landed safely when the fuel was exhausted.