Puh-Lenty of experience with models such as this....the YT, Stick-It, Diamond Unlimited, Lil' Rippy, etc, et al.

The engine of choice back in the day (early 90's) was almost universally the Webra .32 with a mousse can "pipe", and a 10-3 Rev-Up wood prop. Nothing sluggish about it. Acceleration from idle to WOT is about as fast as is mechanically possible with ANY engine...

These models aren't for hovering, etc.....they're all about in-your-face loops, etc faster than you can count 'em.

Most have a very short life span too. <GGGG>