SAE AS394A
SAE AS394A 1958-JUL-01 Rate of Clmb ndcator Pressure Actuated Vertcal Speed ndcator
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This Aeronautical Standard covers four (4) basic types of direct indicating instruments as follows:
TYPE I - Range 0-2000 feet per minute climb and descent
TYPE II - Range 0-3000 feet per minute climb and descent
TYPE III - Range 0-4000 feet per minute climb and descent
TYPE IV - Range 0-6000 feet per minute climb and descent