Airspeed / Mach Speed Indicator, US Air Force Type ME-4 F-101 Voodoo the aircraft is at its

the aircraft is at its maximum allowable airspeed or maximum allowable mach speed

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This is a vintage Cold-War-era Bomb Bay Tank Fuel Quantity Indicator

“Radio Set AN/ APN-2 is an airborne radar interrogator / responder of the "Rebecca" type that will enable an aircraft to home on ground radar beacons of the "Eureka" type such as AN/PPN-1 and AN/PPN-2 and the heavier beacons

This is a fine example of a Cold War-era

Airspeed / Mach Speed Indicator, US Air Force Type ME-4 F-101 Voodoo the aircraft is at itsThis is a Type ME 4 Air Speed Mach Speed Indicator with Maximum Allowable Indicator as used in the Cold War and Viet Nam War era's US Air Force Fighters F 100 Super Sabre and the F101 Voodoo. See images from their flight manuals. The indicator displayed airspeed from 60 850 knots, and mach speed from 0. 5 to 2. 2 mach. The knob, when rotated, adjusted the air speed index pointer along the perimeter of the airspeed scale. The red maximum airspeed