The Kallem Twinfire is a licence built version of the Arado Ar E.500 heavy fighter.

Arado designed this aircraft in 1936 as a heavy fighter with a short, gondola-like fuselage and the Daimler Benz DB 603 engines mounted on twin nacelle/tailbooms. The upper turret had a seat and was armed with twin 20mm Rh LB 202 cannon, while the bottom turret was controlled from the prone position using a periscope for aiming. A crew of four was projected, and a full sized mock-up was constructed before cancellation of the project.

Controls

• Turrets are camera controlled, with the bottom turret's gun only usable when associated camera is being used.
• stabilizing gyro is activated when using bottom turret.