Yes, I've seen that article, Erich.
A couple of months ago we ran a flight test of
the theory that the string in the boundary layer
amplified the actual sideslip. Taped a bent
paperclip with a second string 25mm above the normal one.
The boundary layer a couple of feet from the nose
is quite thin so this should have got it outside the layer.
Nope. Strings seemed to move together.
Need to do this again with several strings at
different heights. The flow disturbance may
extend much further from the surface of the nose.
Mike
At 09:36 AM 1/17/2019, you wrote:
Hello Mike,
is this article useful?
<http://www.wisoar.org/Documents/Holighaus%20-%20Thermalling%20Efficiency.pdf>http://www.wisoar.org/Documents/Holighaus%20-%20Thermalling%20Efficiency.pdf
ta
Erich
On Thu, 17 Jan 2019 at 07:16, Mike Borgelt
<<mailto:[email protected]>[email protected]>
wrote:
When circling in a thermal, do you
a) keep the string centered
b) fly with it pointing to the outside of the turn
c) why?
Your technique may not be doing what you think it is.
Mike
Borgelt Instruments - design & manufacture of
quality soaring instrumentation since 1978
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Borgelt Instruments - design & manufacture of
quality soaring instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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