John and the Armadillo team,

Congratulations for the successful and impressive test flight. It went
up and down so smooth and stable like it was guided by a rail.

The jet vanes and the axles look to be in god shape. Deducing from the
color, they got less hot than on the tests where you had a closed box
welded to the end of the nozzle. In the present configuration I think
there is some secondary air entrained through the mounting frame that
provides some cooling.
At low flight velocities and especially while hovering entrained secondary
air could even significantly augment thrust.



Hans Ulrich Ammann and the SPL team
mailto:[EMAIL PROTECTED]
http://www.spl.ch

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