I seem to remember a technique where you jumped the flaps, that is at a speed just below normal take off you dropped two stages of flap and hauled the airplane off the ground, thus shortening the ground drag of a grass strip.
This was discussed extensively in a thread recently. I can confirm it works a treat in a 150HP Super Cub, when popping 50 degrees of flap does indeed cause you to jump into the air. It's an extreme technique, though, and I imagine that in many aircraft you could end up with a very red face doing it.
<<Bluskis, I asked the same question of my instructor once and when she'd recovered from the shock explained:
What if when you pull the handle nothing happens?
Or the flaps come down asymetrically?
Or you miss the level and have to look down inside the a/c
Or you accidently pull the gear retract (in a retractable, obviously)>>
Or what if there's a giant tsunami and we all get drowned?
<<PS. Or what if you're in a C150 - the flaps would just be extended by the time you turned downwind >>
In the distant past I have done it in a 172, when you select the flaps down and then count three. I somehow doubt it would work in a 150. Choose the aircraft carefully.
QDM