A common question we get asked is "Has anyone been
hit by a RC Helicopter?" and we thought the replies
might be of interest to people who think these are toys....
Although this page demonstrates the danger involved in
they can be flown quite safely if you are careful
and respectful of these things. You should be in the habit
of doing a quick
as well as ALWAYS holding on to the
rotor head tightly while starting.
Before we begin though, lets take a
look at some of the forces and velocities involved in a 30 size helicopter with
average wood blades at 1800 rpm.
Each spindle, blade holder and nylon nut screwed to
it has to hold 270 pounds (122Kg) to keep the blades
from flying away!
The tip speed of each blade is about 250 MPH or 413
If your a person who can throw about 50
MPH (81 KPH)
that's equivalent to hitting something with the tip of
an 8 ft (2.5m) ruler as hard as you can. It would HURT!
If one blade separates and the other is still
attached, the helicopter will have to sustain the force
of a somewhat large man jumping on it from every
direction 30 times per second. It won't last the blink
of an eye and pieces will fly hundreds of feet in every
Remember, these statistics are for 30 sized
helicopter blades. 60 Sized helicopters are much more
powerful, and they're blades are considerably longer and