Registers – Calculators – Bar
Patent
1980-10-31
1982-08-24
Hix, L. T.
Registers
Calculators
Bar
235 78N, 235 88N, G06G 102, G06C 300
Patent
active
043462880
ABSTRACT:
A manually operable calculator for optimizing aircraft fuel consumption during descent from an actual altitude to a target altitude/distance. Altitude and distance scales are provided which are alignable to determine an uncorrected fuel efficient distance to commence a descent from a given altitude to a target location, with separate scales being provided for different airspeeds. Wind and weight correction scales are also provided which give a distance correction based upon the aircraft's weight, prevailing wind conditions, and the difference between beginning and target altitudes. In the preferred embodiment a plurality of altitude scales are employed, each scale having thereon an altitude display which is proportioned in accordance with a respective air speed and given in terms of mach speed for altitudes above a mach speed/I.A.S. transition point, and in terms of I.A.S. below that point. In this embodiment a single, linear distance scale is employed.
REFERENCES:
patent: 2433984 (1948-01-01), De Vries
patent: 3220644 (1965-11-01), Gaudio
patent: 3279695 (1966-10-01), Krause
patent: 3360195 (1967-12-01), Fisher
patent: 3693872 (1972-09-01), Titus
patent: 3825180 (1974-07-01), Gallagher
patent: 3835299 (1974-09-01), Turney
patent: 3929279 (1975-12-01), Dibley
patent: 4011987 (1977-03-01), Cheek
Fuller Benjamin R.
Hix L. T,.
Koppel Richard S.
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