Apr 20 1939
From The Space Library
The free-flight tunnel placed into operation at Langley Aeronautical Laboratory.
April 20-21: Experiments with four-bladed controllable propeller on Curtiss P-36 begun at Wright Field.
Views
Personal tools
- This page was last modified on 15 September 2009, at 15:48.
- This page has been accessed 114 times.
- Privacy policy
- About The Space Library
- Disclaimers