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HelicopterThunder TigerOther › witch is the rigth temperature for a tt50 engine?
04-29-2004 06:48 AM  13 years agoPost 1
vcptech

rrApprentice

Dominican Republic

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witch is the rigth temperature for a tt50 engine? in order to have a good performance

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04-29-2004 09:23 AM  13 years agoPost 2
donlynn

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New Zealand

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Gidday

If I do a full down auto from ~150 ft after doing half a tank of screaming around loopin and rollin and I can hold my finger on the backplate for 4-6 helicopters, all is groovy.

Regards Don

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04-29-2004 11:55 AM  13 years agoPost 3
comet

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Neuilly sur Seine, Fr

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apparently, you bought a temp gun...

fingering the backplate is way enough

VT "slow&low"

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04-29-2004 04:02 PM  13 years agoPost 4
Glenn in Den

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Longmont, Colorado area

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The two don't go together on a TT engine (right temp and good performance).

You should keep it below 200 but I've heard of people going a little hotter. When it is performing so well you can't believe it, it will be way too hot (try it).




Glenn.

I'm not really an R/C pilot, I stayed in a Holiday Inn Express last n

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04-29-2004 04:43 PM  13 years agoPost 5
rckrzy1

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Hurst Texas

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Mine is a hot TT50, don't know why, it has smoke out the pipe thick as
can be, sounds great, power OK and runs 230-250 and I aint
putting my finger on the plate for long. If she dies early, oh well, any
fatter and she won't run right. It may be my last tt50, and is quite
strange as my TT39 runs nice and cool on same magnum 20% fuel.

I also have the magoo needle mod.



Wildcat Fuels

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04-29-2004 10:22 PM  13 years agoPost 6
drdot

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So. California, Orange County.

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Interesting question..

I've played with the TT engines for a few years now, and have come to the following conclusions:
It is almost impossible to get the midrange too rich even with the various needle mods.
These engines like to be run on the warm side compared to others. I blew a rod in the first TT 50 i owned due, I believe, to hydraulic effects of running too rich.
My present TT 39 and 50 were run a little rich for the first tank, then leaned out through the next three. Both run a bit hot to the touch, but neither show signs of wear or stress, and make lots of power.
A side effect of these experiments show that the TT Engines seem to like the Enya #4 plug...Allows a little leaner mixture on top, and runs slightly smoother in the hover..

Your results may vary...

John.

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04-29-2004 10:40 PM  13 years agoPost 7
T.C.

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Nottingham. England.

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My TT 50 also likes to run hot, also use a #3 Enya, i've tried other plugs, but alway's end up with a #3 Enya.

Tony

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04-29-2004 11:39 PM  13 years agoPost 8
Notarheli

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Phoenix, AZ

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You will find the backplate is hotter by doing an auto than by hard flying. When flying, the cold fuel mixture cools the backplate. In an auto there is no fuel to cool it.
We have done tests using a venom on the backplate and another one on the head (special thermistor mounted in a lug which takes the place of the plug gasket and another thermistor mounted on a lug directly touching the backplate). When the head was the hottest, the backplate was the coolest (test was on a 90 engine).
Shooting the head with an IR gun really doesn't say much. The head temperature easily drops by 30° before you can get the blades stopped to check the temp. My YS91 runs 250° and if I land and immediately stop the blades and check the head temp on the venom, it will be 50° cooler than the maximum or 25° cooler than hover temp.

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04-30-2004 01:47 AM  13 years agoPost 9
Ben-T-Spindle

rrProfessor

Central Illinois

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My TT50s (I have two) have always run on the hot side (230-250F) even if I have them rich. First I thought it has a bad temperature gauge but that’s where they run the best.

... BTS

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04-30-2004 05:53 AM  13 years agoPost 10
Glenn in Den

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Longmont, Colorado area

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I feel like "the preacher of the small needle."

Turn the small needle out until the temp drops below 200. You will probably have to lean the high end a little to compensate - - it will let you know.

It will still perform well enough.

I'm starting to think "screw it, let it burn" myself lately. Then I can get an OS50 !!!




Glenn.

I'm not really an R/C pilot, I stayed in a Holiday Inn Express last n

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04-30-2004 06:35 AM  13 years agoPost 11
Geo

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Australia

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On this Temp thing

Seems an easy way to check if shes too hot is just return to idle on the ground and if it doesnt settle straight down into an idle without distress its OK
You know that Dave Gierke puts a temp probe in the heads of his test engines and records an normal 400 F, constant leaned out setting without going too lean
Its hard to under stand the discrepancy between heli engines and ones cooled by a prop
There is a big difference
Geo
Hi Don hows it going

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04-30-2004 08:03 AM  13 years agoPost 12
T.C.

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Nottingham. England.

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I'm starting to think "screw it, let it burn" myself lately. Then I can get an OS50 !!!
LOL.

I've been wishing the same, but the TT just keeps going.

Tony

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04-30-2004 10:29 AM  13 years agoPost 13
Reesy

rrKey Veteran

In the doghouse ... Nottingham UK

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Hey TC ... lend it me....

You'll get your OS soon enough

Geo here's one for you ... I couldn't get my OS50/MP2 to settle into an auto without it "running on" ... replaced with MP2Q (new quiet version) and everything was tickerty boo ..
Got the original MP2 checked out as it looked like it might have developed a hairline fracture but in fact it was OK.

So "return to idle on the ground" is how you do it ? finger on the backplate? ... golden ears ... ?

Tell us EXACTLY how you do it? ..

Paul

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HelicopterThunder TigerOther › witch is the rigth temperature for a tt50 engine?
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