Rémy Fehlmann

With experience, well built and fine tuned helicopter, once can gain confidence and team up, like with a horse. Find my video, where I let it go almost every time once given the direction. Just smooth inputs to tell the intention. Per example, the high speed low passage over the field was done with almost no correction once altitude settled by ground effect. Just let it go, until deciding to quit the manoeuver.

Find ideas of things to check if your heli doesn't stay super tight on horizontal axis when hovering, typically circular moving around axis. Can happen since day one or slow degradation.

1) Check the shaft of all swashplate servos: excessive play can result to lack of precision. Compare the servos, they must be identical. Check also when new.

2) No excessive play of ball links, consider experiencing another brand, some are more tight while still smooth, thanks to high grade polymer.

3) Consider replacing bearings if lot of hours
of run. Some can feel difference after major overhaul. See all exchanged parts in picture, more than strictly necessary but since on it..

Dear scale heli pilots,

Last week I was testing a new B212 build and got PHT2 (v12.79) cut-off after 5 min cool flight. The shutdown data is showing that the fuel pump voltage suddenly drop from 1.5 avg in flight to 0.9, then immediatly tried to recover with 2 volts, but too late; flameout. Hopefully no damage at all despite the crash looking impressive.

All other logged data like rpm, temp, turbine state, etc. looks fine. Also I couldn't see any bubble but maybe got expelled when the pump rushed to recover. The tank had about 30% kero left (felt clunk) but, as in doubt, I'm currently adding a UAT BVM.

My ask: I am correct assuming that the ECU does react to the presence of bubble or cavitation in the fuel line and is the pump expected to increase or reduce it's speed?