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I have had carb ice once. 75F day. Turned base, pulled the carb heat and the engine died. I always try to stay high enough to glide in. Squeaker landing and made the turn off I had planned. Bob Hoover would have been proud. Started the engine again in 5 min. The next week I installed my carb temp gauges. Now I don't even pull carb heat unless it shows near freezing.
One note. I had removed the 4 into 1 crossover exhaust and installed 4 into 4 system. The new exhaust doesn't heat the carb and case like the original. Much cooler oil temps. I'm sure that was the main cause.
On Sat, Jan 2, 2021, 7:50 PM Bruce Crain <jcrain2@...
I’ve never had carb ice. But I don’t know why. Could be the tight fit underneath the cowl and heat around the carb?
If your ice tea glass is sweating you are in the humidity range for carb ice. The vaporization of fuel takes energy which lowers the air temperature drastically. Any water vapor in the air condenses and may freeze.
I remember you telling me about this, and I’m glad that you attached the article, since I’ve had a bit of experience with carb ice. So far I’ve been able to manage it fine with my carb heat mixture set-up, but it’s a very interesting article. Thanks….Dave D
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I hope y'all had a great bringing in of the new year.
I've attached an article I read about once every five years or so regarding carb icing.
We all know about carb ice and the danger it poses. I experienced it years ago in my then Aeronca Chief when, in the summer, the engine stopped producing power on final. At least it would not throttle up when flaring to land and stopped on touchdown. After setting a bit she started just fine...by hand propping of course.
The highlighted area toward the end of the article gets my curiosity up and is what I would like your opinions on since many of you are much smarter than I.
The reason for asking is that somewhere in the 90's I had the throttle shaft, throttle plate and intake manifold teflon coated on my Quickie and this article is where it all started.
One hot humid day back then while looking down the carburetor with the engine running I was surprised at the amount of water that was forming on the throttle plate, the size of the droplets and the time it took for them to run off. Onan carbs are on the top of the engine as most know.
After the Teflon coating was done the water still formed but with a notable difference. The droplets were miniature sized and it was like a contest to see who could run off the throttle plate first. Very impressive.
I've never sought the opinion of others regarding this article but knowing the breath of knowledge among you Q guys I thought I'd reach out and see.
Thanks for taking the time.