Wow.. Rock and Gray Beard.. a sensible answer.

I keep saying "more noise does not equate to more power". All the gimmics have been tried several times over and none work. If the plane/engine/prop combination is working, and is the right combination to take off, fly, maneuver, and land safely, then you have the right combination. If you really want to increase the power well, a bigger engine more than likely your best bet.

If you prop down and get more RPM, well, you lose on the thrust and make more noise.. again.. more noise. Changing fuel mixture will only give you a small percentage of increase in power, and probably nothing that the flyer will notice to make it worth while.

As said, play with different props around the recommended size and go for the best combination. Then if you are still not satisfied, well, that OS .46 AX will do wonders.

CGr.