Historical information

Standard crew issue for pilots and flight engineers


Equipment supplied crew with a computer to calculate true airspeed.

Physical description

2 black discs printed with luminous paint with plastic indicator, used for calculating true air speed.

Inscriptions & markings

COMPUTER. TRUE AIRSPEED. A.C. TYPE G-1 A list of 4 instructions for use. Spec. No. 27367-A, MFG.DWG. No. 42D531, Order No.42-18049-P GENERAL LUMINESCENT CORPORATION, CHICAGO