Running engines lean/rich
06-15-2003 | 05:52 PM
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From: Northants, UNITED KINGDOM
Running engines lean/rich
if you are lean you will get a crackling sound from the exhaust and reduced smoke....
if its too rich it will sound a smidge rough/ 4-strokey (difficult to describe) with lots of smoke and little power....
If its too rich the smoke can go completely as the fuel wont burn sufficiently to smoke... it will just splutter and not pick up.....
if its too rich it will sound a smidge rough/ 4-strokey (difficult to describe) with lots of smoke and little power....
If its too rich the smoke can go completely as the fuel wont burn sufficiently to smoke... it will just splutter and not pick up.....
06-16-2003 | 03:34 AM
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From: Edmonton,
AB, CANADA
Running engines lean/rich
There is a simple test to see if your low speed is to lean or rich.
It's called the pinch test
With the engine idling pinch the fuel line and count the seconds it takes before the engine starts to change pitch and die.
Less than 3 seconds the engine is running lean
more than 5 seconds the engine is running rich.
Any easy way to ensure your engine is not running lean on the high speed is to.
Open your high speed needle 2 turns from where it is.Bring your heli up to half throttle it should be getting light on the skids or even hovering.If it's not keep turning in the needle 1/8 of a turn and repeat.Do this until the heli is light on the skids or hovering.
This is your starting point your can fine tune it from here by doing full power climb outs.
Hope this helps you out if not I'm sure somebody somewhere will try it.
It's called the pinch test
With the engine idling pinch the fuel line and count the seconds it takes before the engine starts to change pitch and die.
Less than 3 seconds the engine is running lean
more than 5 seconds the engine is running rich.
Any easy way to ensure your engine is not running lean on the high speed is to.
Open your high speed needle 2 turns from where it is.Bring your heli up to half throttle it should be getting light on the skids or even hovering.If it's not keep turning in the needle 1/8 of a turn and repeat.Do this until the heli is light on the skids or hovering.
This is your starting point your can fine tune it from here by doing full power climb outs.
Hope this helps you out if not I'm sure somebody somewhere will try it.
06-16-2003 | 08:41 PM
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From: Northants, UNITED KINGDOM
Running engines lean/rich
sorry to be controversial, but you can get as much from a finger on the backplate for 2 seconds as you cn get from a temp gauge...
sorry for typos.I am drunk
sorry for typos.I am drunk
06-17-2003 | 01:43 AM
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From: College Station, TX
Running engines lean/rich
"sorry for typos.I am drunk "
Ha! Brutal honesty - always hard to find in a person! hehehehe
Thanks for the great advice everyone!
Ha! Brutal honesty - always hard to find in a person! hehehehe
Thanks for the great advice everyone!
06-17-2003 | 11:44 AM
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From: London,
Running engines lean/rich
TVILLIANCOURT/anybody
How does your "pinch test" work?
"With the engine idling pinch the fuel line and count the seconds it takes before the engine starts to change pitch and die.
Less than 3 seconds the engine is running lean
more than 5 seconds the engine is running rich."
Is the length of time the motor runs a function of how much fuel is already in the carburettor/engine? Is it a rule of thumb that applies to most 30 size engines?
How does your "pinch test" work?
"With the engine idling pinch the fuel line and count the seconds it takes before the engine starts to change pitch and die.
Less than 3 seconds the engine is running lean
more than 5 seconds the engine is running rich."
Is the length of time the motor runs a function of how much fuel is already in the carburettor/engine? Is it a rule of thumb that applies to most 30 size engines?
06-17-2003 | 11:28 PM
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From: Weirton,
WV
Running engines lean/rich
You can set up all standard glow engine with this test. If it is running rich the excess fuel will run the engine for a couple of seconds before it starts to lean and then run out of fuel.
