F.81 Data Sheet MJS-p-0264

Felsenthal, FAA-95, 1950-1955

Serial Number or Date Stamp:

Country: USA Primary construction material: pl Case included?: no

General Description: Specialty circular slide rule

Length of 1 decade = 16 in, and overall scale length = 16 in. The largest physical dimension is 8 in.

Front Scales: CalAirSpeed [ Pressure ] TruAirSpeed TempRise MachNum

Back Scales: PressGnd MeanTemp [ AltTru AltInd ]

Notes: MB-1 Computer, Air Navigation, True Airspeed and Altitude; true altitude correction spiral on back

References: https://www.madeinchicagomuseum.com/single-post/g-felsenthal/, JOS 16.1 p27 (2007)

Date Acquired: 06/20/2022