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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › YS91SR Full Throttle Hesitation
10-13-2012 08:05 PM  5 years agoPost 1
ThomStilwill

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Plainville, CT - USA

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I have a YS91SR on my R90G4. I seems to be tuned pretty well except for the following behavior:
On Full throttle climbout to 300ft it hesitates a couple times. Plenty of smoke, new plug, tried both richening and leaning, to no avail.

I use Tim Jones tuning technique.

Any ideas?

Thanks in advance,

Thom

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10-14-2012 10:33 AM  5 years agoPost 2
gouki

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philippines

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what do you mean it hesitates? it sounds like it only or does it lose power also when it does? when i was breaking in my 55hz before, it did that during a loop especially when i am almost at the peak. power seemed to be too much and the gov was lowering throttle. have you tried going full throttle with the gov ( if you have it on ) turned off?

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10-14-2012 12:53 PM  5 years agoPost 3
ThomStilwill

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Plainville, CT - USA

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On the climb out it's like it a single quick drop in power then back to full power. I thought maybe it sucked a bubble, but I'm not sure. I'm going to check the fuel system and maybe start using a fuel magnet.

I'm really stumped on this one.

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10-14-2012 03:15 PM  5 years agoPost 4
gouki

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philippines

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have you tried doing that with the gov disabled?

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10-14-2012 07:46 PM  5 years agoPost 5
ThomStilwill

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Plainville, CT - USA

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I will try turning off the rev limiter and running a straight curve, next time.

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