Some good ole vid rpm results...
Testing new CNC fuel tank Carbon 3x3 Prop / Best Peak 33,107 rpm
More typical 32,138 rpm / 91 mph pitch speed / 3.6oz thrust .058hp / 43.3w /
Tank duration 2.57 mins. due to 35% nitro / 20% oil and 3x3 prop a cut down
4.5x2 to 3.75x2 should squeak out 3.5 mins.