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HelicopterMain Discussion › Throttle Jockey
06-01-2004 03:43 PM  13 years agoPost 1
JoeTer

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Green Bay

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I have a problem with my throttle jockey hunting. It seems to keep searching for the speed. Throttle keeps going up and down and searching for the set point. This is on a Raptor 50 with a 9C radio. I have it set for 1500 RPM rotor speed. Anyone oput there help???

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06-01-2004 04:26 PM  13 years agoPost 2
rob_jones

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Perry, GA

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1500 is kind of slow for a Raptor. Maybe it's the engine hunting? You are probably below the power band of the engine.

Try turning it up to about 1650 or 1700 and see if it smooths out.

Blade 550X, T-Rex 450 Pro FBL

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06-01-2004 04:35 PM  13 years agoPost 3
shuttlepilot

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Mullins, South Carolina

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I've also run in to that same sort of thing when I first installed my manual TJ. Just get it above the 1500 range as posted before and it will probably be fine. I have had a servo go bad and cause the same thing also.

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06-01-2004 04:56 PM  13 years agoPost 4
Heli-Driver

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Arlington, TX

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Raise the headspeed slightly as mentioned above and go ahead and re calibrate the governor.

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06-01-2004 06:19 PM  13 years agoPost 5
the collective

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Bayside, NY, U.S.A

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My TJ Pro hunted as well, I tried recalibrating a bunch of times, and different radio settings, but it turned out to be a slightly lean low end mixture causing the engine to hang on the pipe and fight the governor.

You can raise the speed setting to get into the powerband as suggested, but you might also want to richen the low or midrange mixture a bit as well.

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06-01-2004 06:19 PM  13 years agoPost 6
Darksider

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Derby United Kingdom

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have you tuned your engine and set up a usable throttle curve which works before trying to engage the throttle jockey, if not do that first, the throttle jockey bases it's inputs on your throttle curve, so if it's not anywhere close you may get that effect.

Gareth

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06-01-2004 06:28 PM  13 years agoPost 7
rob_jones

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Perry, GA

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All very good points! It is very important that the engine is properly tuned and you have a correct throttle curve PRIOR TO setting up the governor. A governor won't make up for incorrect engine tuning and set up. In fact, it will likely amplify any existing problems.

Blade 550X, T-Rex 450 Pro FBL

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HelicopterMain Discussion › Throttle Jockey
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