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HelicopterMain Discussion › Temp monitor sensor. Is this where it should be installed?
06-06-2004 11:13 PM  13 years agoPost 1
SPB

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Athens - Greece

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Hi,

Here are some pictures on how I installed the sensor of the temp monitor on my engine.

I need some opinions from you guys. Is this the right place (sensor under the carb 90 degrees from the exhaust port) to install the sensor to get accurate readings?

Where do you install yours?

I’ve read that the correct operational temp for the TT engines is 220-230 F for the TT39 and 200-210 F for the TT70. The max temp reading that I have this moment is 194 F for my TT39 and 176 for my TT70. My needles for the TT39 are 2 ¼ the low and 1 3/4 the high and for the TT 70 are 2 ¼ the low and 2 1/8 the high (CP 15% and Enya #3 for both helis). I have plenty of smoke and it seems that I can lean both engines further as the power I am getting is not the max I can get.

What I need to know is if I should install the sensor somewhere else maybe on the opposite side of where I have it now I mean under the engine where the sensor will not be in the air flow of the engine fan


Sotiris
myhelis.com Flying Team

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06-06-2004 11:20 PM  13 years agoPost 2
jetsurgeon

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Raleigh, NC

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I used to run a sensor like that, I put mine on the opposite side of the engine case, so the sensor isn't directly in the fan discharge. I would think direct cold air hitting the sensor would effect the reading.

Good luck,
Jeff

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06-07-2004 04:43 AM  13 years agoPost 3
SPB

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Athens - Greece

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Hey jetsurgeon thanks. I am also suspecting that but I have to be sure where the most accurate reading will be.

What about all the others cmon guys I need to gother some options.


Sotiris
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06-07-2004 04:51 AM  13 years agoPost 4
greg

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Yorkville, IL

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Same as what jetsurgeon says.

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06-07-2004 07:55 AM  13 years agoPost 5
Charlie

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New Brunswick, Canada

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I put my sensor on the engine block across from the exhaust. That's were the manual said to put it (Venom).

.

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06-07-2004 08:07 AM  13 years agoPost 6
SPB

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Athens - Greece

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Thanks for posting guys. I will reverse the sensor today and give it a try.

Charlie I think you have also instelled yours the wrong way. Manual says 90 degrees from the exhaust port not 180.

I think the way Greg and jetsurgeon are saying is the correct one i.e. oposite the side I have it now in my pics because where the sensor is in mine right now is affected from the airflow of the engine fan.


Sotiris
myhelis.com Flying Team

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06-07-2004 11:46 AM  13 years agoPost 7
vortechZ230

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Turn it to the right, so it it is 90 degrees across from the exhaust, and it will work fine!

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06-07-2004 03:06 PM  13 years agoPost 8
Elmote

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Los Angeles

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I have mine opposite of yours, with the wires coming off by the carb, the sensor on the underside. However, mine always gives hot readings. 230-260 not unusual on TT70..

Elmo te

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06-07-2004 03:38 PM  13 years agoPost 9
rcnuts

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Millersville, Penna

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I put mine 90 degrees opposed from the exaust, as the manual states. It is however, in the wash of the fan. Im running around 196 to 200, on a C-Spec. I figure running a tad cool is proper, being the sensor is getting air from the fan.
Harris,

Hooligan, at large

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06-07-2004 05:49 PM  13 years agoPost 10
SPB

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Athens - Greece

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Thanks guys for the input. I will turn it upside down.

Rcnuts you have yours same way as I have and I think we are not getting the right readings cause the air flow reduces the temp.

I think the right way is as jetsurgeon, and elmote are saying, wires coming off the carb, this is how I interpret what the manual says 90 degrees from the exhaust port.

Even thought Elmot I think you should reachen just a little your needles. I have being told that the optimal operating temp of the TT70 is 212 F.

BTW what are your needles settings and what fuel/glow plug are you using?


Sotiris
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06-08-2004 04:46 PM  13 years agoPost 11
Elmote

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Los Angeles

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Richen?

Mine runs so rich Ive had the needle fall out! I'm at about 4.5 turns right now! This engine has alway run hot. Seems to keep going tho.

Elmo Te

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06-08-2004 05:28 PM  13 years agoPost 12
SPB

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Athens - Greece

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Well then I have to admit that either I am lucky or something is going wrong with my engines.

As you can see in my post above I have mines at 2 1/4 and 2 turns out and I am on the reach side

Temps hardly exceed 185 F no matter how hard I am flying.

I just turned the sensor in my R30V2 90 degrees and is now at the exhaust side. I am curious to see the temp readings that I will get. I will try all four sides of the crankase to see the diferences in the temps I will get.

Yesterday I also tryed to reverse the sensor in my R70V2 and I found out that there was a leackage in the backplate. Trying to tighten the screws one broke in the crankcase

A new crankcase is on the way from onlyraptors.com so I have to wait till next week to check out the temps in my R70V2.


Sotiris
myhelis.com Flying Team

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06-09-2004 02:55 AM  13 years agoPost 13
rcnuts

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Millersville, Penna

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Hey
SPB, please post your results when your back up in the air. Im curious to see if your temp gauge will read higher. Ive been wondering if I should move mine to the other side.
Harris,

Hooligan, at large

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06-09-2004 04:56 AM  13 years agoPost 14
SPB

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Athens - Greece

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OK Harris I will.

I will try to go flying today and I 'll post the results.


Sotiris
myhelis.com Flying Team

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06-09-2004 08:55 PM  13 years agoPost 15
SPB

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Athens - Greece

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Harris,

I flew today with the sensor located next to the exhaust. I notice a slight increase in the temp but even now and the main needle closed 2 clicks I show only one time a max temp of 212 F.


Sotiris
myhelis.com Flying Team

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06-10-2004 08:47 PM  13 years agoPost 16
rcnuts

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Millersville, Penna

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Sotiris , are you saying the temp reading went from 185 to a 1 time high of 212, with no change in your needle settings? If thats the case, I need to move mine!
Harris,

Hooligan, at large

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06-10-2004 10:09 PM  13 years agoPost 17
SPB

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Athens - Greece

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Hi Harris.

No I also lean the engine two clicks. The difference with the same settings was not so important.

Now I put the sensor under the crankase on the backplate side. I think this is the correct position because on the upper side under the carb the sensor cools a little from the fan airflow, next to the exhaust it might show a little bit more because of the increased temp of the gases so the most appropriate position IMHO is from the down side of the cranksaft.

I'll keep you posted when I''ll go fly tomorow.


Sotiris
myhelis.com Flying Team

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06-15-2004 04:57 AM  13 years agoPost 18
SPB

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Athens - Greece

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Latest update.

I ended up with the sensor installed under the engine on the oposite side where it is in the pics above, between the head and the backplate. This is where I am getting the most accurate measurements.


Sotiris
myhelis.com Flying Team

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06-15-2004 03:27 PM  13 years agoPost 19
rcnuts

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Millersville, Penna

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Thanks!
Harris,

Hooligan, at large

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HelicopterMain Discussion › Temp monitor sensor. Is this where it should be installed?
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