As I mentioned earlier, I am building these primarily as a step up until my landing skills improve. I am building four 422 models and intend to race them.

Where the Thunder Tiger 40 powered option shines is for a club that already flies the 424 class racer. You have an engine, prop, and tank already. They will fly on the same fields as the 424 class. Why not build your skills with these models.

Concerning 140 mph, I understand that this was what the radar said. It was not my model. It was flying against a 428 powered Q-500.

They are noticeably faster than the 424 model but not as fast as the 428 class. The exact speed is not relative. The main item is if you are having fun.

Again - I love my 422 class model. I just need a stepping stone to improve my landing skills. These models fit my needs.