The program described is aimed at the development of low noise propulsion systems of up to 200 HP for general aviation. The study is broken down into three stages (definition, production and testing). The objective of the program is a noise reduction of 10 dB(A) in comparison to the 1975 LBA noise economy, derived from standard passenger car engines. A comprehensive noise study on possible propellers (including shrouded propellers) forms the basis for the propeller rpm's required for low noise propulsion systems. The conversion of the high rpm's normal for passenger car engines to the low propeller rpm's required is via gearboxes, which are a fundamental problem dealt with. The solution to the problem is given in the definition stage. Studies on the installation of propulsion systems in existing airframes does not show particular problems.

  • Supplemental Notes:
    • Subm-Prepared Jointly with Dfvlr, Brunswick, Propellerwerk Sportavia-Puetzer Gmbh, Dahlem, Limbach-Motorenbau, Koenigswinter, and Tech. Hochschule, Aachen. Final Report on Definition Phase. In German; English Summary.
  • Corporate Authors:

    Vereinigte Flugtechnische Werke-Fokker GmbH

    P.O. Box 1206
    D2800 Bremen 1,   Germany 
  • Authors:
    • Berdrow, B
    • Busch, E
    • Gruenewald, B H
    • HEINE, W
    • Kraemer, U
  • Publication Date: 1977-12


  • German

Media Info

  • Pagination: 384 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00181047
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: BMFT-FB-W-77-23 Final Rpt.
  • Contract Numbers: BMFT-LFK-7551-2
  • Files: TRIS
  • Created Date: Sep 14 1978 12:00AM