WOXOF
1975 PA28-235 Pathfinder
- Joined
- Jan 11, 2013
- Messages
- 14
- Reaction score
- 0
I will be doing a Hope Air (Canadian equivalent to Angel Flight) mission to Northern Ontario on Wednesday when I anticipate temperatures on the ground of as low as -30C (about -22F). I am aware of the necessity of a relief hole in the crankcase breather tube to ensure that pressure doesn't build and blow a seal if the tube freezes solid, and as you can see from the picture, the tube on my aircraft does have such a hole.
The tube extends a few inches below the cowling as it should, but that puts it into the extremely cold air. The relief hole is only about 6" from the bottom of the tube and is only just inside the cowling. My concern is whether there is a possibility that the freezing condensation will build up the tube far enough to block the relief hole also or is there enough warmth that low in the cowling to prevent that from happening.
Any knowledgable advice would be welcome.
The tube extends a few inches below the cowling as it should, but that puts it into the extremely cold air. The relief hole is only about 6" from the bottom of the tube and is only just inside the cowling. My concern is whether there is a possibility that the freezing condensation will build up the tube far enough to block the relief hole also or is there enough warmth that low in the cowling to prevent that from happening.
Any knowledgable advice would be welcome.
