At our club we used saftety stands as mentioned above and shown at http://www.meroke.com/safetybench.htm . We had to rebuild some of these stands a few times after a few years. I redesigned the safety stand and now have 2 of the new design at our field, and three more are being built by the membership. The new design we use can be downloaded from our website at http://www.wilsonrc.org/news.php and clicking on DOWNLOADS.

Have you ever started an engine when the throttle was accidentally wide open? It is rather stupid to do that so many might think they would never do that. It has happend to me 3-4 times. Having the plane strongly restrained is a must.