SAE AS393B
SAE AS393B 2002-JUL-01 Arspeed Tubes Electrcally Heated
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This aeronautical standard covers two basic types of instruments as follows:
Type I - Pitot Pressure, straight and L-shaped, 12 and 14 volt nominal, 2 wire circuit.
Type II - Pitot and Static Pressured, straight and L-shaped, 12 and 24 volt nominal, 2 wire circuit.