TBF-1 Avenger Torpedo Bomber Cruising Calculator Mark 1-A, Ser # 4669-43 Smiths the fine engraving on the

the fine engraving on the silver scale and arm

giving it quite a heft

he must initiate a missed approach procedure

flight instruments

The left knob adjusts the indicated airspeed which is displayed in the left window

TBF-1 Avenger Torpedo Bomber Cruising Calculator Mark 1-A, Ser # 4669-43 Smiths the fine engraving on theThis is an authentic original WWII era Cruising Computer Mark 1 A designed specifically for the US Navy's Grumman Torpedo Bomber TBF 1. The purpose of the calculator was to determine the range, in nautical miles, of the aircraft under various conditions of aircraft weight, head tail winds, fuel quantity on board, true air speed, altitude, and throttle and supercharger blower settings. The calculator is essentially a custom 3 panel slide rule