Aeronautics and astronautics – Aircraft power plants – Arrangement
Patent
1978-09-11
1982-01-19
Frankfort, Charles E.
Aeronautics and astronautics
Aircraft power plants
Arrangement
244 35R, 244198, 244130, B64D 2702, B64C 310
Patent
active
043112897
ABSTRACT:
Modifications to a jet aircraft of the type having aft fuselage-mounted engine nacelles overlapping trailing edge portions of the aircraft's wings, wherein a channel area defined by the fuselage, wing, pylon and attached nacelle is shaped to prevent air flowing therethrough from forming a shock wave during flight operation in the transonic regime, resulting in significant drag reduction as compared to an unmodified jet aircraft of a similar type. Further modifications to the jet aircraft's wings provide additional lift while significantly reducing drag as compared to a similar, unmodified aircraft. The present invention is particularly adaptable for use with Gates Learjet type aircraft, especially Models 23, 24, 25 and other models having similar nacelle, pylon and inboard wing arrangements.
REFERENCES:
patent: 2165482 (1939-07-01), Hovgard
patent: 2709052 (1955-05-01), Berg
patent: 3952971 (1976-04-01), Whitcomb
patent: 4050651 (1977-09-01), Neal et al.
patent: 4121787 (1978-10-01), Wilby
"Citation 500 Mod by Astec: $170 Gs", NBAA Convention News, Sep. 27, 1977, Houston, Texas.
"Cessna Mod Promises More Speed, Range", Daily News, Sep. 29, 1977.
Frankfort Charles E.
The Dee Howard Company
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