Jump to content
Sign in to follow this  
cessna

ethanol and carburetor ice

Recommended Posts

 

I'm having a debate on an aircraft forum about carb icing. Straight gasoline and the right atmospheric conditions will cause icing in an updraft carb like airplanes use. I say that 10% or more ethanol fuel shouldn't have the icing problem since antifreeze is basically in the mix as it goes through the carb. What do you think?

Marty

Share this post


Link to post
Share on other sites

I would think, and this is just my theory, that the ethanol would actually be beneficial in preventing carburetor icing.  Ethanol, especially in the dry form used in fuel, attracts and holds water.  In the carburetor, having it soak up any moisture may actually be beneficial.  After all, look at the main ingredient in fuel line de-icer.

 

I also think running some form of additionally heated intake air might be a good idea.  You may already be doing this; I'm not familiar at all with the mechanics of airplanes.

Share this post


Link to post
Share on other sites

rusty70f100 wrote  I also think running some form of additionally heated intake air might be a good idea.

 

Aircraft with carbs do have a carb heat box which delivers either filtered outside air or air that has flowed past the exhaust system warming it. When ice builds up and chokes the engine you add carb heat but sometimes people haven't noticed soon enough and there isn't enough heat in the exhaust to melt the ice and you have a big problem. I think like you about the ethanol in the fuel and feel carb heat shouldn't ever be needed.

Share this post


Link to post
Share on other sites

Well, the other part of my thinking was that ethanol doesn't vaporize quite as readily as gasoline, and that some form of heating may help efficiency.  Then again, at the high rpm's and high loading that I would guess airplanes run at, things might be moving quick enough to not have to worry about it.

 

Just thinking out loud.  I've never even been more than probably 50 feet off the ground, and that was in a building, so I really couldn't tell you for sure.  ;D

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...