Carby Heat Check

[vk3auu]

Rick-p (and others). My CH701 has no carby heat and generally carby ice is not a problem because of the warm temperature under the cowl. However, one day whilst flying west in mid afternoon in clear sky into a head wind a few miles north of West Sale, I climbed from around 2500 feet to get higher into a westerly airstream that I could see to the south of me in the plumes of Loy Yang power station. The plumes were visible because of the higher humidity and/or lower temperature at around 4000 feet.

 

As I climbed, the engine started to run roughly and it occurred to me that the cause was carby ice, so I went back down again and put up with the headwind until I got past the Yallourn power station where I got the tail wind at a lower altitude.

 

David