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HelicopterFlybarless Rotor Head SystemsV-Bar › New 600 First Flights
04-11-2011 12:58 AM  6 years agoPost 1
Thumpernator

rrKey Veteran

Senoia, Georgia, USA

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After fighting engine issues last weekend, today was entirely different. Even with the super rich new YS56, it had lots of power. Even without a Trim or Optimizer flight, the Vbar holds rock steady. Took awhile to get used to the new feel,,,,, but I like it.

The one issue I have is that the Governor hunts a little bit when I first go into Idle UP. Afer a little maneuvering, it grabs and holds the selected RPM. Don't know if it's a setting I need to tweak or that the engine is new and set real rich.

Lowered the Gain from 60 to 50 and it didn't seem to make a difference. Should I have tried a Higher Gain? Or should I just wait until I get the engine broken in and tuned?

Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk

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04-11-2011 10:15 AM  6 years agoPost 2
ChristianM

rrVeteran

Oslo, Norway

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I am guessing that when you go into idle-up the throttle "jumps" up and since the engine is rich it is slow to react cauing the oscilations. It will probably improve when the engine is fully broken in and tuned. One way to reduce the problem is to increase the "Runup speed limit" to for example 30 - 50. With a higher value the VBar will be more "gentle" when changing head speeds in that it changes the head speed more slowly giving the motor time to respond.

Christian

Burn fuel, be happy

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04-11-2011 05:28 PM  6 years agoPost 3
melderor

rrNovice

Stone Mountain, GA.​USA

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I am haveing the same issue with my Trex 700 and YS 91 (1 year old well broken in). When I first spool up the GOV hunts until I give it some collective and then it smoothes right out for the rest of the flight. My GOV GAIN is at 80, I moved it up to 90 but that did not change anything so I moved it back to 80. Any help would be great.

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04-13-2011 04:13 AM  6 years agoPost 4
yannick

rrVeteran

South Korea

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I have exactly the same with my Rave and YS 3DS. I do not know why but it only lasts for 2 or 3 seconds and disapears, I can live with that...

Is it me or this time the ground was higher than last time??

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