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HelicopterFuel-Helicopters New or Limited ActivityRJX Hobby › MultiGov Pro on the way... YS50 Temp and what to​use to mount sensor
07-08-2008 12:38 AM  9 years agoPost 1
The_Widowmaker

rrElite Veteran

Bear Valley Springs,​CA

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My Multigov Pro will be here mid week. I want to be ready when it gets here so I need data

What target temp should I shoot for on the head of the YS?

What is being used to mount carb smart sensors to the head?

Im hoping whatever is being used to mount the sensors can be picked up at the local automotive store.

Thanks

"I'm a Virgin.. I'm just not very good at it. "

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07-08-2008 01:04 AM  9 years agoPost 2
tchavei

rrProfessor

Portugal

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What target temp should I shoot for on the head of the YS?
Depends on your fuel, location, ambient conditions.

I have mine now at 116C with great results BUT I fly at sea level, 20% nitro, ambient temp around 100F with 40% humidity.
What is being used to mount carb smart sensors to the head?
Most people (me included) are using Arctic Silver Alumina Thermal Epoxy (not compound).

If you can't find it, get the compound (this one you can get at any computer store... its used to improove heat transfer between the processor and cooler) and mix it in the same proportion as the epoxy: 1 part resin, 1 part hardener, 1 part compound. Works almost as good as the alumina.

Tony


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"Perfection and patience usually walk side by side..."

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07-08-2008 01:08 AM  9 years agoPost 3
ez2bgman

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N'awlins, LA

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Before activating the throttle mixture control on the MGP, make sure you have your engine tuned for max power. I always tune my YS to hit about 200-210 right where the head and the crankcase meet. Then I richen it 1-2 clicks from there. I too have an MGP coming this week to replace my Revmax/Carbsmart combo. I ran the Carbsmart at the 110 C temp setting and had the gain about 55-60%. Since my YS was already buttloads of power and running consistently before the Carbsmart, I didn't notice a huge performance difference.

To mount the sensor to the head, I use Arctic Silver Thermal Epoxy. If you cannot find any locally, you con get the Arctic Silver Thermal compound from Radio Shack. This isn't an epoxy so you mix it 50/50 into some regular 30 minute epoxy. I haven't used this method yet, but I know others here on RR have used it with great success. The sensors are VERY (and I mean VERY) fragile. Handle them with care. Put a layer of thermal epoxy between the two middle fins (behind the glow plug), then carefully smear some thermal epoxy onto the sensor, gently insert it between the fins on top of the other epoxy, and finally cover the top of the sensor too. You want the sensor to be completely surrounded by the thermal epoxy with no air bubbles. I went through 3 sensors before I got it right. If there are any air bubbles, then the sensor will be allowed to vibrate and it will break. Take your time. It is easier to pull the head off the YS while installing the sensor.

Here's a pic of the Thermal Epoxy I use. I got mine from GrandRC.

If you have anymore questions, don't hesitate to ask.

Hope this helps. Later.

Gary
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07-08-2008 03:31 AM  9 years agoPost 4
The_Widowmaker

rrElite Veteran

Bear Valley Springs,​CA

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Ok the only one I could find at GrandRc was the compound. I order Arctic Alumina Premium Ceramic Thermal Adhesive Epoxy from another location.... is this correct?

"I'm a Virgin.. I'm just not very good at it. "

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07-08-2008 05:11 AM  9 years agoPost 5
ez2bgman

rrElite Veteran

N'awlins, LA

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If you read the description from GrandRC you will see this:
When it absolutely needs to stay on forever, Arctic Silver's Arctic Alumina premium ceramic alumina adhesive is the way to go. This high temp adhesive will ensure that the heatsink will stick to whatever you attach it to.

The ceramic composition means that there is no danger of a short circuit, unlike the silver based compounds. Arctic Alumina conducts heat away from sensitive components and improves the efficiency of your cooling system. Keep things cool and functioning under the hottest action!
To answer your question, yes that is the same stuff that GrandRC has.

Gary
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07-10-2008 03:55 PM  9 years agoPost 6
The_Widowmaker

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Bear Valley Springs,​CA

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I just got my MG Pro and the do it yourself temp sensor. Wow those things are tiny......... I cant believe I was able to get it right without destroying them all. Well I have not mounted it to the head yet as Im waiting on the thermal epoxy but it is assembled and operating.

"I'm a Virgin.. I'm just not very good at it. "

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07-24-2008 12:09 AM  9 years agoPost 7
The_Widowmaker

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Bear Valley Springs,​CA

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Well thought I was going to be able to settle in and actually enjoy this 50. Got MG dialed in, engine running strong and then I pick up this rattle. Took my engine apart and found it all to be good. Looked at all the mechanics and they were good... then as I was picking up the muffler, which I shook prior to taking everything else apart, I hear the internals moving around. Come on.. less than 20 flights, no crashes or hard autos. Not even run long enough to get fuel spots on it.

Should I fly it like that????

"I'm a Virgin.. I'm just not very good at it. "

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07-24-2008 12:46 AM  9 years agoPost 8
ez2bgman

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N'awlins, LA

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What muffler?

Gary
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07-24-2008 12:47 AM  9 years agoPost 9
The_Widowmaker

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Bear Valley Springs,​CA

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My Bad. RJX

"I'm a Virgin.. I'm just not very good at it. "

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07-24-2008 03:36 AM  9 years agoPost 10
ez2bgman

rrElite Veteran

N'awlins, LA

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I too have the RJX muffler, but have had zero issues with it. Do you notice a decrease in performance since the rattling started?

Gary
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07-24-2008 03:38 AM  9 years agoPost 11
The_Widowmaker

rrElite Veteran

Bear Valley Springs,​CA

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It was windy when it happened so any change in performance I thought I may have seen could have been due to wind..... but I did notice a change.

"I'm a Virgin.. I'm just not very good at it. "

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