Originally Posted by
egrave1
Now I have another question the 65/5" airplane calls for a 1.20 I have a thunder tiger 1.20 with a Pitts muffler and I have a 30cc gas engine that weights 20g lighter could I used the 30cc instead or would I get into trouble
When comparing the weights, don't forget to include the muffler, ignition module and battery. The published weight of most gas engines does not include those. Also, the 120 size airplane may not have the ground clearance to swing the bigger prop that the 30cc will need.