VX1e gov problem

[aww]

I've just replaced my 3GX with a VX1e On my Trex 700N and I now have a problem with the gov. When I do a full climb out the go to mid stick (to check mixture) the engine almost quits. I've tried upping the gain from 50% to 80% but no difference. I've tried altering the mixture, no difference. So I thought it might be the throttle servo (the original one was showing a little slow on my servo tester) but this as made no difference. Everything was OK when running the 3GX. I've also converted my RJX xtreme 50 to a VX1e and that on runs just fine. Bothe are using the Align sensor ( wires swapped as per instructions). With the gov disengaged it works just fine. Any Ideas ?
Anthony

[dodeye]

I've just replaced my 3GX with a VX1e On my Trex 700N and I now have a problem with the gov. When I do a full climb out the go to mid stick (to check mixture) the engine almost quits. I've tried upping the gain from 50% to 80% but no difference. I've tried altering the mixture, no difference. So I thought it might be the throttle servo (the original one was showing a little slow on my servo tester) but this as made no difference. Everything was OK when running the 3GX. I've also converted my RJX xtreme 50 to a VX1e and that on runs just fine. Bothe are using the Align sensor ( wires swapped as per instructions). With the gov disengaged it works just fine. Any Ideas ?
Anthony

Same thing happened to me on vortex n all it was after lots of head scratching was the magnet in fan lost its magnitusm. Replaced it sorted . 👍🏻

[stargazer]

Hi mate,
I had almost the same problem recently with my Synergy n5 with vx1e,without the governor on there would be a nice consistent smoke trail across the throttle range,when I turned the governor on at midstick there was no smoke,I asked for advice on here and it turned out the gov gain was to high when I lowered it from 50,ending up at about 30 it cured it.With the gain high its shutting the carb to quick starving the engine of fuel and if you are up to 80 on your gov gain it will probably explain why your engine is nearly quiting.

[hedge]

Gov gain in my Trex 700n is 35 with VX1e

[aww]

Thanks for that. It may be a couple of weeks before I get out again, but I will report back.
Anthony

[Angelos]

Turn the governor off to tune the engine and adjust the throttle curve. Only after the engine is running well you can turn on the governor.

[torque to twist]

Your gain is way to high i would start at 25 after the engine is tuned with the gov off

[dieselcarb]

I fly 700 n with vx1. i use about 25 gain anything higher it just pumps the throttle i may even need to go lower yet

[aww]

Got out this morning for an hour. I've tuned the engine with gov off then adjusted the gain to 35% and tried it. Eventually got it down to 16% and almost there but just as I was bringing it down there was a very loud crack and the tail kicked out. I then landed it and checked it over, nothing obvious so I packed in and brought it home for a closer inspection. Not a clue what happened.
Anthony

[aww]

I've had several flights now, I've replaced my Align 2in1 with a Gryphon reg, new throttle servo. I've tried the gov at 15% all the way up to 65%. tune the engine with the gov off. Adjusted my throttle curves and it's still not right. The gain doesn't make any difference at all. The gov is working ( I get different head speeds at different flight modes) but the throttle reaction is so slow from full collective to mid stick ( engine almost shuts down) but I've noticed that when in fast forward flight making a turn the throttle is not reacting fast enough. I tried it this morning with no gov and it works much better (although it overspeeds on decent )
Any ideas?
Anthony

[neilb]

Try turn the minimum throttle limit up the preset may be to low for your set up try 30% and adjust from there if heli overspeeds lower as needed .

[tomatwalden]

... (although it overspeeds on decent )
Any ideas?
Anthony

On that point at least, the blades will overspeed regardless of any governor since they overtake the motor due to the one-way-bearing.

[aww]

I've changed the sensor for a Spartan one and it's much better but not perfect. I've also set the min throttle to 38% which helps but the gain make little if any difference.
Anthony

[torque to twist]

When you say 'Adjusted my throttle curves and it's still not right' Can you tell us the values on each flight mode?
Also can we have the servo travel values
Thanks

[aww]

When you say 'Adjusted my throttle curves and it's still not right' Can you tell us the values on each flight mode?
Also can we have the servo travel values
Thanks

Sorry for the delayed response, work got in the way. My throttle curves are N=1-50-100 / 1= 95-55-95 / 2= 100 55-100. My throttle travel is +3 min throttle and +97 max. My throttle idle endpoint is 93% and my throttle max endpoint is 80%.
Anthony