Compatible With HY Nylon 1 Pc Propeller 7-12 Inch Compatible With Engines Of RC Plane Class 9-91

Product Description:
Propellers from 7inch -12 inch
CAUTION
Compatible With the great amount of propellers with varied types of different purposes, users should fly with them follow the instruction below Compatible With :
1.Please run your propeller with proper power system, and please do some necessary adjustment with test of / dynamic balance seriously, or you will easily have it damaged;
2.When the power system is working, please make sure that there is no one standing in front or on either side of it ( or its intake, if it is an electric ducted fan power system), preventing it from flying off unexpectedly and causing danger;
3.If there are some cracks or any structural damages on the propeller, please displace another one as soon as possible to prevent it from flying off into pieces and causing danger;
4.Before flying, please make sure the propeller is fixed well through the motor shaft and the two of which are in the same ;
5. Please make sure the runway is clean, because such things like branches and little stones and easily cause danger and damage to people all around and the plane itself.
* This guide can also be applicable in the term of "Ducted Fan Power Units".