BS 2G 135:1967

This standard BS 2G 135:1967 Specification for electrically-heated pitot and pitotstatic pressure heads is classified in these ICS categories:

• 49.090 On-board equipment and instruments

1.1 This British Standard specifies the requirements for two grades of electrically-heated pitot and pitotstatic heads for aircraft.

• Grade A, heads fully de-iced and suitable for high speeds.
• Grade B, heads not suitable for flight in severe icing conditions.

1.2 Grade A comprises two classes of head:

• Class 1, heads not compensated for pressure error.
• Class 2, heads compensated for pressure error.
• 1.3 Grade B heads will normally be of the non-compensated type.