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Cessna 152 (proper) air/fuel ratio...



 
 
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  #1  
Old May 15th 12, 12:58 AM
dtvonly dtvonly is offline
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Posts: 2
Default Cessna 152 (proper) air/fuel ratio...

Hi. I am a student pilot and have always done "proper" leaning per flight altitude. I should have asked this a long time ago but...anyway...when using the mixture control to get "optimum" RPM at altitude, what is the "optimum" air/fuel ratio ? 3:1, 4:1, etc...

Thank you.
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  #2  
Old May 19th 12, 05:23 PM posted to rec.aviation.misc
Panic[_4_]
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Posts: 5
Default Cessna 152 (proper) air/fuel ratio...

"dtvonly" wrote in message ...


Hi. I am a student pilot and have always done "proper" leaning per
flight altitude. I should have asked this a long time ago
but...anyway...when using the mixture control to get "optimum" RPM at
altitude, what is the "optimum" air/fuel ratio ? 3:1, 4:1, etc...
Thank you.
dtvonly

Unless you have a device that reads out your air/fuel ratio you should
probably just use the old method. At cruise altitude with power/speed
stable, just lean out the mixture control until the engine runs a little
rough and then push it back in about an inch.

  #3  
Old May 20th 12, 06:36 AM posted to rec.aviation.misc
RST Engineering[_2_]
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Posts: 36
Default Cessna 152 (proper) air/fuel ratio...

Varies with the engine, with the fuel atomizaion scheme, displacement,
etc, but most of us live with a 15:1 air fuel ratio as a starting
point.

Jim




On Mon, 14 May 2012 23:58:14 +0000, dtvonly
wrote:


Hi. I am a student pilot and have always done "proper" leaning per
flight altitude. I should have asked this a long time ago
but...anyway...when using the mixture control to get "optimum" RPM at
altitude, what is the "optimum" air/fuel ratio ? 3:1, 4:1, etc...

Thank you.


  #4  
Old May 21st 12, 05:47 PM posted to rec.aviation.misc
Bug Dout
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Posts: 109
Default Cessna 152 (proper) air/fuel ratio...

RST Engineering writes:

Varies with the engine, with the fuel atomizaion scheme, displacement,
etc, but most of us live with a 15:1 air fuel ratio as a starting
point.

Jim


By volume or by mass?
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~ Lenny Bruce
 




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