AS391C - Airspeed Indicator (Pitot Static) (Reciprocating Engine Powered Aircraft)

Details Document Number: AS391C Revision Number: C Title Airspeed Indicator (Pitot Static) (Reciprocating Engine Powered Aircraft) Scope This Aeronautical Standard covers five basic types o fairspeed instruments as follows: Type I - 1 revolution Type II - 1 revolution (unequal scale) Type III - 1 1/2 to 1 3/4 revolutions Type IV - 7 revolutions Type V - 1 3/4 to 2 revolutions

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