At 23:36 20 July 2009, bildan wrote:
On Jul 20, 10:45=A0am, Del C wrote:
So how come do we hardly ever break weak links during the ground
run????

Derek C

See previous post about "little old lady" style throttle advance.

The reason we don't break weak links is because we take up slack at just
over tickover revs, when the engine is not producing much power or torque.
As the glider starts moving (all out) we advance the throttle over about a
2 second interval right up to the preset power stop. The automatic gearbox
then does its job and allows smooth acceleration and smooth gearbox
upchanges until a safe rotation speed is reached. The rest of the launch
is done with the gearbox in top and essentially fixed ratio.

The techniques and the way you think an automatic gearbox works, that you
have suggested up to now, are more appropriate to drag racing than winch
launching!

Derek Copeland