At 14:14 20 February 2014, Hans Heydra wrote:
Hi Guys
Just read through the last 66posts on this page. After what happened here
in South Africa this week I though something needs to be done. I was
thinking along the lines of a tilt switch. Whilst noodeling I cam across
a
UK company see...
http://www.leveldevelopments.com/pro...tilt-switches/
and what they did for another company.
http://www.leveldevelopments.com/cas...ghting-system/
This really stood out....
**The final sensor was a custom solution comprising a three axis
accelerometer and 3 axis tilt sensor. The tilt sensor used a customized
filter algorithm to ensure the dynamics of the vehicle in use did not
cause
false alarms.**

This system can be tested a low initial cost with a light on the tug
pilots
dashboard every time it is triggered to iron out false alarms.

Only thing you need is a tilt switch. With a safety ON and OFF.
Basically before the tug the pilot turns "ON" the tilt switch switch then
proceeds with the tug. If the tug is pulled into a **30 degree dive the
tilt switch is activated and drops the rope automatically through a yet
to
be worked out system.(Could be explosive, pneumatic or some other method)
Once the glider pilot has released (under normal gliding conditions) the
switch is turned "OFF" by the tug pilot so it will not be deposited over
some farm field when the tuggie dives back to the field at **30 degrees.

**30 degrees is an example could be 25, 35, 40 Tests would have to be
done.



To repeat one point, our tests left us convinced that the tail-plane on the
tow-plane stalled quite early on in the kiting event, it would need some
tests to check exactly how early. It might be that the nose down angle
would have to be quite small, something that could happen in turbulence
perhaps.