Power plants – Reaction motor – Interrelated reaction motors
Patent
1995-07-06
1997-01-14
Freay, Charles G.
Power plants
Reaction motor
Interrelated reaction motors
602261, 60262, 60725, 60 3902, 415119, 181213, 244110B, F02K 302
Patent
active
055928137
ABSTRACT:
A hush kit for jet aircraft engine includes a respaced inlet guide vane to provide an increased space between the fixed guide vanes of the inlet and the rotating fan blades of the fan connected to the core engine, a mixer for mixing hot exhaust gas from the core engine with colder bypass fan air, and an acoustic barrel to reduce the noise generated by the mixed air flowing through the thrust reverser downstream of the core engine. The acoustic barrel includes an outer imperforate layer, an inner perforate layer and a multi-cellular core sandwiched therebetween. The ratio of the thickness of the multi-cellular core to the open area defined by the holes in the inner perforate skin of the acoustic barrel is designed to reduce noise of a particular frequency range generated by the aircraft engine. In combination, each of the components of the hush kit described herein reduce noise generated by the jet engine for compliance with Federal Aviation Administration noise reduction requirements.
REFERENCES:
patent: 2988302 (1961-06-01), Smith
patent: 3065818 (1962-11-01), Lombard et al.
patent: 3437173 (1969-04-01), Ehrich
patent: 3455413 (1969-07-01), Henley
patent: 3542152 (1970-11-01), Adamson et al.
patent: 3696617 (1972-10-01), Ellis
patent: 3739984 (1973-06-01), Tontini
patent: 3792584 (1974-02-01), Klees
patent: 3819009 (1974-06-01), Motsinger
patent: 3821999 (1974-07-01), Guess et al.
patent: 3861140 (1975-01-01), Krabacher
patent: 3893640 (1975-07-01), Hull, Jr. et al.
patent: 4137992 (1979-02-01), Herman
patent: 4217756 (1980-08-01), Laskody
patent: 4235303 (1980-11-01), Dhoore et al.
patent: 4244441 (1981-01-01), Tolman
patent: 4384634 (1983-05-01), Shuttleworth et al.
patent: 4401269 (1983-08-01), Eiler
patent: 4433751 (1984-02-01), Bonneau
patent: 4449607 (1984-05-01), Forestier et al.
patent: 4452335 (1984-06-01), Mathews et al.
patent: 4543784 (1985-10-01), Kirker
patent: 4723626 (1988-02-01), Carr et al.
patent: 4751979 (1988-06-01), Wiseman
patent: 4759513 (1988-07-01), Birbragher
patent: 4817756 (1989-04-01), Carr et al.
patent: 4836469 (1989-06-01), Wagenfeld
patent: 4909346 (1990-03-01), Torkelson
patent: 5127602 (1992-07-01), Batey et al.
patent: 5440875 (1995-08-01), Torkelson et al.
patent: B15127602 (1995-05-01), Batey et al.
Flight, p. 640, Oct. 17, 1958.
Overhaul Manual, Boeing Commercial Jet 65-72778, Nov. 15, 1968.
Overhaul Manual, Boeing Commercial Jet 65-27802, May 15, 1969.
JT3D Thrust Reverser Illustrated Parts Catalog, Pratt & Whitney Aircraft, Jan. 1, 1970.
Program on Ground Test of Modified Quiet, Clean, J3D and JT8D Turbofan Engines in Their Respective Nacelles, Boeing Commerical Airplane Company, NASA NAS CR-134553, Sep. 1973.
Overhaul Manual, Boeing Commercial Jet 65-27800, Nov. 10, 1974.
Overhaul Manual, Boeing Commercial Jet 65-72778, May 10, 1975.
Blumenthal et al., Aircraft Community Noise Research and Development: A Historical Overview, J. Acoust. Soc. Am., vol. 58, No. 1, Jul. 1975.
Arctander et al., Development of Noise-Reduction Concepts for 727 and 737 Airplanes, J. Acoust. Soc. Am., vol. 58, No. 1, Jul. 1975.
Overhaul Manual, Boeing Commercial Jet, 65-27800, Aug. 10, 1975.
Overhaul Manual, Boeing Commercial Jet 65-27846, Nov. 10, 1975.
Overhaul Manual, Boeing Commercial Jet, 65-27805, Nov. 10, 1977.
Pratt & Whitney Aircraft Group, JT8D-200 Commercial Installation Handbook, Section 1, Mar. 1, 1978.
Interavaia, Pratt & Whitney's JT8D-209 Program, John F. Brundley, Sep. 1978.
Aviation Week & Space Technology, Low-Noise 737's, Apr. 2, 1979.
Geddes, J. Phillip, Interavia, The DC-9 Super 80, Sep. 1979.
Interavia, The Latest 737 Enter Service, Oct. 1980.
Pratt & Whitney Service Bulletin No. 4127, Rev. 9, Apr. 29, 1981.
JT8D Maintenance Manual, Pratt & Whitney Aircraft, Nov. 1, 1981.
Overhaul Manual, Boeing Commercial Jet 71-02-01, May 10, 1982.
Boeing Overhaul Manual, 173-1010, p. 5, Jul. 5, 1982.
Boeing 737 Service Bulletin Summary No. 737 78-1032, Feb. 17, 1984.
Interavia, A Quiet Boeing 727-200, Aug. 1986.
Model Specification, United Technologies Pratt & Whitney, Aug. 1, 1986.
Pratt & Whitney Service Bulletin No. 5897, Rev. 1, Jan. 12, 1990.
Pratt & Whitney Service Bulletin No. 5946, Dec. 13, 1990.
Pratt & Whitney Service Bulletin No. 5950, Rev. 1, Jun. 8, 1992.
Pratt & Whitney Service Bulletin No. 5947, Rev. 3, Jun. 30, 1993.
Avaero
Freay Charles G.
LandOfFree
Hush kit for jet engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hush kit for jet engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hush kit for jet engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1380825