Fast3D
50cc
Da-35! The DLE 40 twin is wider than the VVRC 40. It won't fit in the cowl. DLE 35 should work as well if you can't swing the DA-35. Why not the VVRC I have one and it is excellent in this airframe.
I think my VVRC 40 has completed its lifespan. I sent it back to Tim 3 times and still after 3 repairs it completely stopped working. so instead of bothering Tim again, I think I should move on to a new engine.