Serge, Carb icing normally occurs above freezing, and becomes impact ice due to the expansion. Carb icing does not occur when the OAT is near freezing. You will almost never need carb heat, but then...... it can become very important. My worst case occurred on the way to Funday Sunday, which is always the first SUNDY in may, and it was a very "pretty" day.
I had noticed the RPMs decreasing, and when I pulled on the heat, all kinds of noise occurred. My little girl put fingdernail marks in the IP. It's important when you need it. Read the comments and info on the Ellison web site about the need for carb heat on slide valve carbs, like the POSA, etcetera Ron Freiberger mailto: rfreiber...@swfla.rr.com Really? How hot exactly do you think the intake air has to be to prevent carb icing? I thought as long as it was above icing temp, it would be fine?
