I meant people getting too close with the tach behind the prop as well. And as far as being in front to check RPM, I again blame the advertisers. When I first got mine, I was checking in front of the prop because that was what the guy in the instructions was doing. Then I wised up and thought, boy this is stupid, and stater to use it from behind so that I could make needle adjustments as well.
ORIGINAL: rcjake-RCU
scottrc,
Jim Ross did not run the tach into the prop and loose the end of his thumb and damage the rest of his hand. The firewall came out of the fuse! It is amazing the number of firewalls that have come out of the ARF fuses lately. Props can also get thrown from the engine and get your hand, chest, throat, eye, etc. I do not think that there is any reason to be in front of a running engine, except when starting.