Browse Standards AS404
Historical ISSUED 1948-11-01

Electric Tachometer: Magnetic Drag (Indicator and Generator) AS404

To specify minimum requirements for Electric Tachometers primarily for use in reciprocating engine powered civil transport aircraft, the operation of which may subject the instruments to the environmental conditions specified in Section 3.3. This Aeronautical Standard covers magnetic drag tachometers with or without built-in synchroscopes.
AS404C
2008-02-16
Latest
Reaffirmed
AS404B
1991-05-01
Historical
Reaffirmed
AS404A
1954-12-15
Historical
Revised
AS404
1948-11-01
Historical
Issued

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