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peak 26, help

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Old 06-16-2007 | 03:04 PM
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From: almansaalbacete, SPAIN
Default peak 26, help

From the first take-off the engine does not go roundly, shares out. I have proved{*tried*} different mixtures of oil, position of the ignition, regulation of the carburetor, batteries of 4,8 and 6 v of 2.500 mh and nothing is still equal, sharing out. Someone can help me to solve this nightmare. Thank you
Old 06-16-2007 | 03:40 PM
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Default RE: peak 26, help

What are you doing for the cooling? Do you have an exit 3x as big as hole in front of the engine? Do you use any ducting? Air that goes 50mm from the engine is NOT cooling it, the air must go through the fins.

You seem to have ruled out the IE, mixture, oil, so that leaves you cooling. Do you have pictures of your engine installation?
Old 06-16-2007 | 04:43 PM
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Default RE: peak 26, help

The engine not this installed in a plane, I am doing the filming to him{*her*} in a test bench for what not this covered and it{*he;she*} gives him{*her*} the air to refresh.
Old 06-16-2007 | 04:48 PM
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Default RE: peak 26, help

Also, what size prop are you running on it? What type plane is it / was it in? What type muffler are you running on it?
Old 06-16-2007 | 05:20 PM
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Default RE: peak 26, help

The propeller is one 16/8, the bench is a structure of wood where the engine is screwed and the leak is type Pitss, the original one of the engine.
Old 06-17-2007 | 07:21 AM
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Default RE: peak 26, help

16/8 is the correct prop for this engine. How much time do you have running the engine? It may not be broken in yet. You should be running 35 to 1 gas/oil mix, start the engine then peak the rpm, then turn the needle valve out a little so it's slightly rich setting, run the engine for two minutes, stop it for about 5 minutes to cool. Repeat the run and cool 5~6 times, then try to fly it a partial throttle settings.

One thing you may want to check is the carb's location. If the carb is located where the wind blows perpendicular to the carb's intake it makes a vacuum and messes up the carb's metering. A way to test if this is the problem is to use a venturi stack cut at an angle, facing the wind, or do like a friend did to prove this was the problem which it was in his case, tape a piece of a coffee cup to the carb so that the wind couldn't blow across the venturi opening.
Old 06-17-2007 | 03:28 PM
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From: almansaalbacete, SPAIN
Default RE: peak 26, help

For soarrich .Thank you for his(its) answer. I TAKE spent(consumed) 3 liters of fuel to 30:1 and 45:1 with oil Castrol. As for the carburetor this engine takes it in the later(posterior) part. I believe that the problem is going to be the Chinese ignition that I have touched the villain. A greeting
Old 06-17-2007 | 09:15 PM
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Default RE: peak 26, help


ORIGINAL: soarrich

16/8 is the correct prop for this engine. How much time do you have running the engine? It may not be broken in yet. You should be running 35 to 1 gas/oil mix, start the engine then peak the rpm, then turn the needle valve out a little so it's slightly rich setting, run the engine for two minutes, stop it for about 5 minutes to cool. Repeat the run and cool 5~6 times, then try to fly it a partial throttle settings.

One thing you may want to check is the carb's location. If the carb is located where the wind blows perpendicular to the carb's intake it makes a vacuum and messes up the carb's metering. A way to test if this is the problem is to use a venturi stack cut at an angle, facing the wind, or do like a friend did to prove this was the problem which it was in his case, tape a piece of a coffee cup to the carb so that the wind couldn't blow across the venturi opening.
This engine has rear induction.
Old 06-18-2007 | 11:58 AM
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From: almansaalbacete, SPAIN
Default RE: peak 26, help

For ram 3500-RCU

Please, explain it to me mas detailed since the term induction in Spanish is very wide. The engine this mounted according to instructions of origin. Thank you

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