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HelicopterMain Discussion › Throttle servo
12-09-2004 03:13 PM  13 years agoPost 21
kaare

rrNovice

Oslo, Norway

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I see your point.

So lets say that 1/2 travel should be enough to do most of the corections that the governor dictates. We would then need a servo with a speed of 0.04 sec for a full 60 deg. to ensure that the servo would not be a bottleneck.

And a side question : what is the movment needed in degrees to go from full throttle to no throttle ?

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12-09-2004 03:25 PM  13 years agoPost 22
mrNoodles

rrProfessor

Borlänge, Sweden

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Wont the ATV´s (low and high) be both 100% if the linkage is set up as the manual suggests?
And if the servo travels 60 degrees, wouldnt that make the throttle barrel to turn 60degrees also (if the throttle arm is the same length as the servoarm). Or have I missed something

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12-09-2004 04:22 PM  13 years agoPost 23
DS 8717

rrProfessor

Here wishing i was somewhere else

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Jason Krouse says a fast servo wont help with a governor,look in his set up tips. Also with a governor it is possible for the throttle to go below 50% or whatever you have it set at ,if it is overspeeding. The governor will close the throttle however much it needs to.

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12-09-2004 05:35 PM  13 years agoPost 24
Colibri

rrKey Veteran

The Netherlands

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Jason Krouse says a fast servo wont help with a governor
If you are referring to the quote he has on his website he is not talking about governors in general but the GV1 specific.
Also you can install the fastest throttle servo in the world and will have no effect on the performance of the GV-1
The TJ-Pro, RevMax & RevLock have a special mode in which the frame rate is higher for digital servos. The GV1 doesn't have this. This has nothing to do with how fast the servo is but with how fast it can accept a new position command.

The response time is the time the GV1 takes + the time the servo takes + the time the engine takes. If we forget the response time for the engine for a second and only look at the GV1 and servo there is no reason to stop improving the servo speed once this drops below the GV1 response time. It is still the sum of the two that counts.

That said the real question is how fast the engine can respond to throttle changes. Most people only think of opening the throttle but to prevent overspeeding the throttle must be closed. I've never proved this but it is my gut feeling that an engine responds faster to closing than to opening the throttle. So depending on the throttle response it might be the case that a fast servo helps when closing but not when opening.

I've never seen figures indicating how fast an engine can increase/decrease power so whether or not a fast/digital servo helps is pure guessing for me.

Tim

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12-09-2004 05:40 PM  13 years agoPost 25
kaare

rrNovice

Oslo, Norway

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The response time is the time the GV1 takes + the time the servo takes + the time the engine takes.
I rest my case

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HelicopterMain Discussion › Throttle servo
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