Browse Standards AS391B
Historical REVISED 1954-12-01

AIRSPEED INDICATOR (PITOT STATIC) AS391B

This Aeronautical Standard covers five basic types of airspeed instruments with indication range essentially 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
AS391C
2008-02-16
Latest
Reaffirmed
AS391B
1954-12-01
Historical
Revised
AS391A
1949-02-01
Historical
Revised
AS391
1947-07-01
Historical
Issued

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