Richgj3
BENEFACTOR
LI,NY
For you cold weather guys.
On my 1952 170B the cowl opening block offs cover about half the opening on the inboard side of the opening. This results in covering the air inlet for cabin heat as it is behind that one. On the other side, the inlet for the carb heat is outboard of the plate and works normally.
With the plate installed that covers the cabin heat inlet, there is no cabin heat. (No surprise). So logic says cut an opening in the plate the same size as the inlet. But that doesn’t work, verified by guys in the 170 association and also a guy with a 140 trying the same thing. The 170 forum is does not have a lot of members, so I thought I’d try here.
I have to assume there is something going on with turbulence around there or a low pressure there that is interfering with the ram air going into the inlet. There is no way to reposition the inlet on that side to be unobstructed by the plate.
The first picture shows the opening without the plate. The inlet is hard to see but it is a vertical oval close to the case.
I wonder if anyone here has solved this issue.
Rich
On my 1952 170B the cowl opening block offs cover about half the opening on the inboard side of the opening. This results in covering the air inlet for cabin heat as it is behind that one. On the other side, the inlet for the carb heat is outboard of the plate and works normally.
With the plate installed that covers the cabin heat inlet, there is no cabin heat. (No surprise). So logic says cut an opening in the plate the same size as the inlet. But that doesn’t work, verified by guys in the 170 association and also a guy with a 140 trying the same thing. The 170 forum is does not have a lot of members, so I thought I’d try here.
I have to assume there is something going on with turbulence around there or a low pressure there that is interfering with the ram air going into the inlet. There is no way to reposition the inlet on that side to be unobstructed by the plate.
The first picture shows the opening without the plate. The inlet is hard to see but it is a vertical oval close to the case.
I wonder if anyone here has solved this issue.
Rich