The production aircraft bore little resemblance to the prototype. Additional interplane struts were added; there were ailerons at all four wing tips with improved balances; a compound tail unit was incorporated and the wings were slightly swept to compensate the "sawn-off" nose. With the accent on speed, forward armament was deleted, and the consequent shortened nose enabled the engines to be placed closer together, thereby improving asymmetric power characteristics. Armament consisted of a Parabellum machine gun in the dorsal position."
The tiny sign in the grass in front of both aircraft read: