For what it's worth:
Engine: LA 46 with RC carb.
Prop: TT Cyclone, 11x4.5
Airframe: Banshee
Data collection: TUT
The graphs show the engine speed and aircraft pitch rate vs. time.
The engine speed graph is a bit complicated at first: the procedure is that you start the engine with the timer set to hold the throttle in the "flight" setting, and you tach the thing while adjusting the needle as usual. Then you flip a switch and the engine goes to idle (just like an electric!) for 20 seconds, then it goes to a "launch" throttle setting (and you launch), then finally it goes to the "flight" setting.
Two things I find are of note: first, the amount that the engine unloads in the air, and the steadiness of the RPM once in the air. It was launched at 9800 RPM according to my tach, yet when it went to the flight throttle setting in the air it flew at over 13000 RPM. At the same time, if you look at the engine behavior in the loops, you'll see a slight RPM variation, mostly corresponding to altitude, but you don't see any great correlation between engine speed and airplane speed, even though this particular airplane really slows down at the tops of maneuvers.