Ya know that left stick on you TX that controls the throttle? It's variable!

You dont have to fly balls to the wall all the time.
But seriously. If the .25FX intimidates you, look for a good used .25 FP or .25 LA. The plane bearing engines have just a little less power and wouldstill make the planeflyable. You will find that you will always be flying full throttle though. This is not a typical 1/12 scale combat bird. Its closer to 1/9. Modeltech classifies it as a .25-.36 bird. Put an OS .25FX in it and you wont be disappointed.
My $.02