Pattern and threshold speed calculator

Details Pattern and threshold speed calculator Pattern and threshold speed calculator

1979-08-14

1981-02-17

Hix, L. T.

Registers

Calculators

Single axis

235 78N, 235 88N, G06C 2700, G06C 300

Patent

active

042517214

ABSTRACT:
A circular disk type calculator for determining the proper approach speed for a particular aircraft within a specified range of gross weights and flap settings. The calculator includes three superposed circular disks pivoted for independent rotation about their centers. A third lower disk is imprinted with appropriate speed and weight information. A second intermediate disk includes cut-outs and windows to expose certain readings on the lower disk and also includes a flap setting marker extending outwardly from its outer edge. A first upper disk is provided with appropriate windows and markings relating to the other disks thereby indicating the desired information including pattern and threshold air speed for the gross weight and flap setting of the aircraft.

REFERENCES:
patent: 2076242 (1937-04-01), Marquis
patent: 2943789 (1960-07-01), Parigini
patent: 2996242 (1961-08-01), Bannister
patent: 3010650 (1961-11-01), Aubert
patent: 3929279 (1975-12-01), Dibley
patent: 4011987 (1977-03-01), Cheek
patent: 4134006 (1979-01-01), Gordon

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