Ace: I think that's a fair question. Without a speed gun, I can only say the plane weighs about 5 pounds. I fly off mowed grass. I increased tire diameter to 2.5 inch. The plans call for a .46 c.i.. I run the ST 51 on 15% nitro with a 10/6 master airscrew 2 blade. I don't recall a tach reading. It seems to be moving right along at lift off. It's not near stall or hanging on the prop.
I found the construction manual. The kit maker was Moto-tek. After stating the throws for the elevons (both high and low rates) he adds: "NOTE: Set the trim on elevons up 1/8" to 3/16" from center position to achieve a level flight"
I have the throws and trim set as recommended.
The plane is undergoing "maintenance" (okay....some repairs) so it will be next May before we fly again in northern Wisconsin.