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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Thunder Tiger Pro .39 Running hot
09-05-2006 08:34 PM  14 years ago
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Raptormania

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Canada

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Thunder Tiger Pro .39 Running hot
Thats for all the info Guys. Yesterday I tried it again. I opened the low speed on 3 turns but could not get the heli to stay going, so i turned it in a half a turn and the same thing, then I turned it in a quarter turn and it sounded and ran very nice. There is a good trail of smoke but it still seem like the engine is still getting hot. I'm not sure how hot these engines are suppose to get. I had a Nexus 30 with a OS SX 32 in it and it never used to get near as hot as this one. I can touch the muffler or the head because it is to hot. The body of the engine i can put my finger on it for about 5 seconds but it is still prety not. I was wondering if they all get hot like this or will I do damage? The engine is flying great but it is hot. Can someone let me know what they think, Thanks
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09-05-2006 08:41 PM  14 years ago
DarkSideSimba

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Alaska

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TT can handle ALOT of heat. You will be amazed on the temps these motors can withstand. And still run great.

DSS
Evolution.. Times Have Changed.. Has Your Heli??? Sceadu Evo.. Tomorrows Heli.. Todays Evolution
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09-05-2006 11:40 PM  14 years ago
Yug

rrMaster

UK. Herts

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If you can comfortably keep your finger on the back plate for 5 seconds, then you're probably OKVegetable rights and Peace
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09-06-2006 12:26 AM  14 years ago
BJames111

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San Diego, California

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the tt engines are mostly tuned off of the low end needle...it should be about 3 turns out. The high end needle really only affects the upper 25% of the throttle.
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09-06-2006 02:03 AM  14 years ago
ADRYAN

rrKey Veteran

Stouffville, Ontario, Canada

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My TT39 ran at about 195*F and higher. Sorta normal I presume..... until I did the ultimate upgrade... OS 50 Hyper. After a nice flight, I could put my beer on it to cool it....


A

.
DYNAX/OS91 : 9303/S649pcm : GY601/9251 : CSMRL10/9253 : 7.4vLipo/Regulator : KO2123s(ai/el/pi)
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09-08-2006 12:12 AM  14 years ago
Motoman8504

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Houston, Texas - US

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I have my TT39 running pretty good right now and its been running consistent. I try to keep the temp around 190-240 Farenheit. I think that's the "sweet spot" for this engine. I've read in earlier posts that it is common to run the low needle turned out as much as 6-8 turns to keep the temp down. I tried that method before and it just didn't work out for me. I found that the more you turn out that low speed needle, the hotter it gets and performance suffers. My theory is that if you turn out the low needle out too much it will allow air to leak in and run inconsistently. I've had my high needle at 3 turns out and the low way out there and had the temp around 300F sometimes higher.

Now I start out with the high at about 3 turns out and I play with the low speed needle once the engine is warmed up so that I can have the idle low enough that the blades don't spin and still idle strong and steady. After I did this I couldn't believe how low I was able to idle the engine. Now whenever I need to adjust for temp control I use the high speed needle and it worked out great. Ever since I did this its been running consistent at about 210-230 after a full tank of flying.
Raptor 30V2 TT39H Pro, 7CHP
T-rex 450XL CDE, 325 Pro blades, al tail case and tail pulley
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