Deep breath.  And is the chain/wire not really long (long like 18") so that it can't build up too much speed difference with the thing attached to the other end and then snap and go into the prop like has happened to multiple others but instead stay around and beat the heck out of the wing skin and maybe still not snap anyway?  

  If so, is it attached to a chain so that it won't come off and hit the prop?

Wendell