The RCV SP motors are very strong but not very fast.
By this I mean, they pull like a freight train, but at a scale like speed.
As an illustration, I had a 120SP in a very heavy TF corsair (6kg), swinging a 4 blade 15.5" x 12" prop at 5.5K
I thought it was going to be a missile across the sky but was very surprised when lifted off at a very sedate scale like speed.
I was then concerned that I did not have enough power and was waiting for it to fall out of a loop. I need'nt have worried, it just hauled that 6kg around at the same speed whether I was going straight up or straight down.
And they sound great.
I currently have a 61SP I am fitting to a SeaFury, currently with a 15.5" x 12" 4 blade (yes, the same size as the 120) which it is managing to spin at 4.2K, which was very surprising. I will probably trim it down to pick the revs up towards 5K before flight, but it looks nice and scale on the aircraft.
Building ductwork for cooling is going to be the next challenge.