Measuring and testing – Vehicle chassis – Steering
Patent
1988-07-01
1989-05-30
Myracle, Jerry W.
Measuring and testing
Vehicle chassis
Steering
G01M 1500
Patent
active
048339113
ABSTRACT:
The present invention comprises a system for measuring the thrust delivered by aircraft engines which rely on induced flow for their propulsive effect. In the preferred embodiment, for use in conjunction with turboprop engines, the system includes mechanisms for measuring static pressure immediately in front of the turbopropellers and for measuring free stream ambient pressure. These pressure measurements are furnished to a computational device such as air data computer for use in calculating a static to ambient pressure ratio which correlates with commanded thrust in accordance with mach number. The pressure ratio information may be displayed for direct use by the aircraft pilot in determining thrust or adjusted for the effects of mach number and then displayed as an indication of net thrust, and/or supplied to other aircraft instrument systems requiring thrust information.
REFERENCES:
patent: 2455251 (1948-11-01), Hersey
patent: 2579617 (1951-12-01), Schaevitz
patent: 2941399 (1960-06-01), Bersinger
patent: 3538760 (1970-10-01), Atkey et al.
patent: 3837220 (1974-09-01), McDonald et al.
patent: 3886790 (1975-06-01), Plett
patent: 4003249 (1977-01-01), Laskedy
patent: 4130872 (1978-12-01), Harloff
SAE Transactions, vol. 66, 1958, pp. 357-363, "Thrust Measurement for Jet Transport Operations" by M. J. Saari.
Johnson Paul E.
Zeeban Joe P.
Myracle Jerry W.
The Boeing Company
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