Bedix Vertical Tapes were in vogue when the General Dymamics TFX (F-111) Crewstation Design Engineers were fitting out the cockpits general arrangement. This set up was also used in later F-105s, 106's, the C-141, C-5A, B-1A/B, as well as the STS Shuttle, YF-12A and several other platforms..This video shows the AVI and AVVI do a test so the tape movements can be easily seen. All readings are taken at the mid line of the Instruments and Command Bars, Target Alt cues and Maximum Safe Speed Bars all articulate separately. Heavy and complex, they still were a state of the art Solution for ascertaining alot of critical flight data at a glance.
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