tt39 engine help
03-15-2005, 09:19 AM
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tt39 engine help
I am having trouble getting my tt39 tuned right. At about half stick it starts to vibrate so i checked blade tracking and balance , all ok I can use throttle hold to hold the engine just below half stick and it flys fine.
can anyone tell me whats wrong and how to fix it.
im running 30% fuel
can anyone tell me whats wrong and how to fix it.
im running 30% fuel
03-15-2005, 10:46 PM
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RE: tt39 engine help
Im not sure of the head speed got tach ordered but with the throttled held alittle below half stick using the throttle hold it will hover with no vibration but when i take the hold off at about half stick it starts to vibrate
03-16-2005, 08:53 AM
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RE: tt39 engine help
Please don't take this the wrong way, I'm not trying to be "harsh" here, but the FIRST thing you need to do before you worry about tuning the engine is getting that thing set up right... When throttle hold is on, the engine should drop to a point where the clutch is disengaged and should NEVER be able to throttle up beyond that point... you should never even be able to get the blades to spin when the throttle hold is on, let alone get it to hover... If that isn't set up right, then it's hard to tell how many other things are incorrect.. Surely there is someone experienced around that could help you out? Even if it means taking a day trip somewhere? You need to make sure your pitch curves are set up right, make sure your throttle curves are set up right, make sure your head speed is right, and get that radio set up right...
03-16-2005, 10:19 AM
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RE: tt39 engine help
Yeah I know throttle hold is for. I was just using it to see if it was the engine or something else. the pich and everything else is right.I changed from 15 to 30% fuel not long ago and thats when it started.
03-16-2005, 01:00 PM
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RE: tt39 engine help
With higher nitro content fuels you ALWAYS have to run much richer... If you haven't adjusted the needle valves on your engine, there's no way it's running correctly on 30% with the same settings that were used for 15%...
03-16-2005, 03:55 PM
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RE: tt39 engine help
I adjusted the needle vale when i changed fuel. Im afraid to mess with the mixture screw as im not good at tuning as you can tell. LOL
03-17-2005, 09:46 AM
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RE: tt39 engine help
I've used tons of TT engines... Every one has been fantastic... They aren't a pain to tune, but you DO have to know HOW to tune... The OS engines are great too, and rarely need any tuning of the low-end, usually just a tad on the high end... If you don't know how to tune an engine, and don't want to learn, then definately toss the TT cause you'll never be happy with it...
03-17-2005, 10:43 AM
#13
RE: tt39 engine help
ORIGINAL: rusirius
If you don't know how to tune an engine, and don't want to learn, then definately toss the TT
If you don't know how to tune an engine, and don't want to learn, then definately toss the TT
More like if you don't want to learn, find another way to spend your money. It takes a lot less effort to ask someone for help if you don't know how to tune it than it does to do it wrong and burn up an engine running way too lean. There has to be someone around that can help you tune it right so you don't ruin the engine. Makes a big difference
