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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › ZENOAH 26PUH COOLING PROBLEM for UH-1D
03-22-2020 12:01 AM  4 months ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Good fuselage for RC Zenoah format. For PUH, bad news.

You have this PUH motor already on the fuselage so, several things to take into consideration:

1. Hotter place is the muffler because the 2T combustion finished there. The bigger the muffler or pipe, the better.
You need to isolated this area.

2. If you put fans on board, the key is to handle all this air to the bottom.
Separate fans for muffler.

3. No matter how many fans you put inside, the PUH motor is going to run real hot!
So, your concern is electronics and all plastics stuff you have there.

4. Isolate the fuselage with some sort of isolating tape.

5. "The pot" must be isolated or separated from boom. So, no hot air may flow thru the boom.

6. No fresh air is coming from rotor so, fresh air must be taken from both sides of "the pot".

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Saludos cordiales,
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05-19-2020 04:58 PM  83 days ago
chook1kimo

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Taipei

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Hi all,
I am running my 260puh it appear much smoke from exhaust when high speed.Does it normal or something wrong? Thanks
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05-19-2020 07:41 PM  83 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Check your gas/oil ratio.
It looks like oily gas...

32:1 should be OK but it is depend upon your zenoah motor model.

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Saludos cordiales,
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05-19-2020 08:45 PM  83 days ago
rcheli808

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Mililani,Hi-USA

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Hey Kimo, you could also check your spark plug and plug gap. Hopefully it is not your piston rings being worn down from running you engine on the hot side.
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05-20-2020 02:43 AM  83 days ago
chook1kimo

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Taipei

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I use ZENOAH FD class oil 50:1 and have 2 engines.They are same result.
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05-20-2020 07:09 PM  82 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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50:1 ???... Lean...

50:1 mean:

50 liter gas.
1 liter oil.

Or
500cc gas.
10 cc oil.

With a regular oil, This proportion could be mortal for a Zenoah, With a premium oil, probably not.

Smoke?... Piston ring out!

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Saludos cordiales,
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05-20-2020 08:18 PM  82 days ago
chook1kimo

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Taipei

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500cc gas :10 cc oil
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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › ZENOAH 26PUH COOLING PROBLEM for UH-1D
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