SAE AS404A-1954
ELECTRIC TACHOMETER: MAGNETIC DRAG (Indicator and Generator)

Standard No.

SAE AS404A-1954

Release Date

1954

Published By

Society of Automotive Engineers (SAE)

Status

Be replaced

Replace By

SAE AS404B-1959

Latest

SAE AS404-4-2015

Scope

This Aeronautical Standard covers magnetic drag tachometers with or without built-in synchroscopes.

SAE AS404A-1954 history

• 2015 SAE AS404-4-2015 AS404 Spring
• 1970 SAE AS404C-2008 Electric Tachometer: Magnetic Drag (Indicator& Generator)
• 2001 SAE AS404C-2001 Electric Tachometer: Magnetic Drag (Indicator& Generator)
• 1991 SAE AS404B-1991 ELECTRIC TECHOMETER: MAGNETIC DRAG (Indicator & Generator)
• 1959 SAE AS404B-1959 Electric Tachometer: Magnetic Drag (Indicator & Generator)
• 1954 SAE AS404A-1954 ELECTRIC TACHOMETER: MAGNETIC DRAG (Indicator and Generator)
• 1948 SAE AS404-1948 ELECTRIC TACHOMETER: MAGNETIC DRAG