747,
Even if you secure the test stand down. There engines have enough power to pull the stand apart. As Charlie said you'd be surprised how much power they really have, and you don't want to find that out as the plane pulls free right into your stomach.

Foosball,
A length of rope and a tent stake. That's all I ever use. So far I've been able to secure up to a 1/3 scale plane with no problems with it. And the beauty of it is that it costs less than a buck!!!

Ken