1W. Z. Stepniewski and R. A. Shinn, NASA TR 82-A-10 A Comparative Study of Sovietvs. Western Helicopters:Part 2-Evaluation of Weight, Maintainability and Design Aspects of Major Components[ R]. Ames R-esearch Center:AVRADCOM Research and T-echnology Laberatories, 1983:56-68.
2M. N. Tishchenko, A. V. NekrMov, A. S. Radi (NASA-CR- 181503 ) Helicopters: Selectionof Design Parameters [R]. International Technical Associates, April, 1979:27-30.
3Willis, R. J. , New Equations and Charts Pick Off Lightest Weight Gears[ J ]. Pro-duct Engineering v. 34, n. s. 2, January 21,1963 : 64-75.
4Andrew T. Bellocchio, Drive System Des-ign Methodology For a Single Main RotorHeavy Lift Helicopter[ DR]. December 2005: 25 -32.
5D. W. Dudley,McGraw-Hill,C, ear Handbo-ok[M]. 1962,pp 13-3.
