Tham khảo Bell_533

Ghi chú

  1. ↑ TRECOM Technical Report 63-42, 1963, p. 5.
  2. 1 2 3 Robb, Raymond L. "Hybrid helicopters: Compounding the quest for speed" Lưu trữ 2006-09-27 tại Wayback Machine. Vertiflite. American Helicopter Society, Summer 2006.
  3. 1 2 Pelletier, Alain J. Bell aircraft since 1935. Annapolis, MD: Naval Institute Press. 1992. ISBN 978-1-55750-056-4.

Bibliography

  • Bell Helicopter. TRECOM Technical Report 63-42, "Summary Report, High-Performance-Helicopter Program, Phase I", U.S. Army Transportation Research Command, September 1963. (summary information Lưu trữ 2011-08-23 tại Wayback Machine)
  • Bell Helicopter. TRECOM Technical Report 64-61, "Summary Report, High-Performance-Helicopter Program, Phase II", U.S. Army Transportation Research Command, October 1964. (summary information Lưu trữ 2012-02-27 tại Wayback Machine)

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