Here is my Dart flying with a .8cc engine some speed passes and slower throttled down passes.
https://www.youtube.com/watch?v=4Ge0MRZroIQ
Published on Jul 30, 2016
DART -Fuji .05 / Profi Tuned Pipe HQ 5x4.5N
Top end rpm check with a smaller prop
https://www.youtube.com/watch?v=7IaQ4o_qXZ8
Published on Jul 24, 2016
Best pass 36,747 rpm 157mph 4x4.5 prop per audio tach brief burst rpm past camera slip not est.
With the right size plane the prop speed can be used to it's full advantage.
Per Doppler wave analysis: 238 kmh / 147.89 mph best pass.
Down wind shallow dives gets the rpm up the prop is too small into the wind.
This plane was originally built for TD .09 a smaller plane is needed to get
the most out of the engine. Anticipate 39k with this prop easy enough.
Test flight with a lower pitched prop.
NANO II - TD .010 / 2nd Trim Flight 2.7x3N Prop 118 MPH
https://www.youtube.com/watch?v=XsEHh2MEv14
Published on Jun 6, 2016
NANO II - 2.2oz RTF / 35% nitro
Best pass vid 2 (this is vid 3) was 41.5k 118 MPH
Best pass vid 3 / 39,244 rpm 112 MPH