Hi!

I've been flying the SD Decathlon with an ASP 61 4-stroke. Used 13x6 and 14x6 prop.
I personally found the SD a little underpowered during take-off with the 61. It seemed to loose/lack much speed at the first stage of the climb and often tipstalled.

I have an ASP 80 4-stroke ready to be mounted in the plane now. Really looking forward to see the results.
Loved flying the decathlon, but hated the tipstalling.