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특허 상세정보

Method for reducing turboprop noise

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64D-033/02   
미국특허분류(USC) 244/01N ; 244/053B ; 244/065 ; 415/119
출원번호 US-0920618 (1997-08-27)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Woodard, Emhardt, Naughton Moriarty & McNett Patent and Trademark Attorneys
인용정보 피인용 횟수 : 12  인용 특허 : 14

An apparatus and method for reducing noise within the fuselage of a propeller driven aircraft. In one embodiment the propeller blades are spaced apart and in front of an offset inlet. The inlet provides air to a gas turbine engine powering the propeller, and also to a scavenge duct. The propeller blades and inlet are spaced apart such that during cruise conditions for the aircraft, the trailing edge of the propeller blades are spaced apart from the inlet by more than one-fourth of the chord length of the propeller blades, and less than about the chord le...


[ What is claimed is:] [1.] An apparatus comprising:an aircraft with a wing, said aircraft cruising at an altitude greater than about 20,000 feet above sea level and an airspeed greater than about 250 knots true airspeed;a propeller with a plurality of propeller blades, said propeller being located adjacent said wing, said propeller rotating to provide forward thrust for said aircraft, each said propeller blades having a trailing edge;a gas turbine engine for powering said propeller; andan offset inlet duct for providing air to said gas turbine engine, s...

이 특허에 인용된 특허 (14)

  1. Gliebe Philip R. (Waynesville OH). Active low noise fan assembly. USP1995125478199.
  2. Pla Frederic G. (Schenectady NY) Rajiyah Harindra (Clifton Park NY) Renshaw Anthony A. (Albany NY) Hedeen Robert A. (Clifton Park NY). Active noise control using noise source having adaptive resonant frequency tuning through stress variation. USP1995055415522.
  3. Gilbertson Frederick L. (Rexdale CAX). Air intake system for engine. USP1984064456458.
  4. Fuller Christopher R. (312 Reynolds St. Apt. 3 Blacksburg VA 24060). Apparatus and method for global noise reduction. USP1987124715559.
  5. Metzger Frederick B. (Simsbury CT) Magliozzi Bernard (West Suffield CT). Cabin noise suppression in propeller driven aircraft. USP1985084534526.
  6. Sanderson John J. (Oakville CAX) Banks Ivor (Georgetown CAX). Controlled bypass inlet duct. USP1990114972672.
  7. Ben-Porat Avi (Norwalk CT). Fail-safe, anti-icing system for aircraft engines. USP1983084397431.
  8. Flatman Richard J. (Derby GB2). Gas turbine engine. USP1989114881367.
  9. Stockman Norbert O. (Batavia OH) Yates David E. (Cincinnati OH) Crum Timothy S. (Fairfield OH). Nacelle inlet for an aircraft gas turbine engine. USP1991105058617.
  10. Harris Alfred W. (Bellevue WA). Noise reducing air inlet for gas turbine engines. USP1980124240250.
  11. Kaptein Dick (Alphen A/D Rijn NLX). Propeller blade position controller. USP1996095551649.
  12. LoPresti Leroy (2050 13th Vero Beach FL 32960) LoPresti Jim (2620 Airport N. Dr. Vero Beach FL 32960). Propeller syncro-pulsing. USP1996125588619.
  13. Norris Richard M. (Stratford CT) Murphy Joseph P. (Newtown CT). Swinging door particle separator and deicing system. USP1981024250703.
  14. Harm Dorson J. (Seattle WA) Zabinsky Joseph M. (Bellevue WA). Translating lip aircraft cowling structure adapted for noise reduction. USP1991055014933.