It was a spring scale that went up to 5 lbs...

We held the aircraft vertical with the spring scale attached to the tail wheel and went to full throttle. It pulled it past where the scale would register...Not accurate, but over 9 lbs!

Just seems like about half that while hovering. I guess it's probably true, but accelerating out of a hover REALLY takes some power...

If these little guys are giving 10 lbs of thrust, I'll bet my YS .63 would have come out to be about 15 lbs of static thrust...

Something ain't right...