I've been fighting the old how do I warm up the rear seat in my 8 syndrome for several years.
My feet were always burning up and my wife was always freezing.
I didn't want to do the whole cut the spar web, run the scat tube thru the gear tower routine so I came up with just a bit simpler method to skin both cats.
I made a small box that attaches to the firewall that was thin enough not to interfere with the rudder pedals. Made a scat flange that angled off to the side so get the tubing off to one side of the cockpit and then ran 1 3/4 inch scat back to the z brace under the panel. Got an eyeball outlet and mounted it off to one side to I could blow the air down the cockpit sidewall and into the back seat. I still get plenty of warm air on my feet and my wife is toasty in the rear cockpit. The eyeball vent is far enough to the side and far enough back that it doesn't cook my leg.
For me it's a pretty good solution.
Box that connects to the firewall and covers the inlet air. The actuator cable actually has a slot cut in the bottom so no modification of push/pull cable required.
Mounted on firewall. I did put a hose clamp on after the photo was taken. Adel clamp is to attach misc cables to for security. I used a 1 3/4 inch flange and scat to run back to the eyeball vent. Ran nicely just beside the fresh air vent from the NACA vent on the forward left side of fuse.
Put the eyeball vent on a bracket that I attached to the z brace below instrument panel. This location doesn't blow on my leg and is below my hand on the throttle. Great warm air flows right to the back seat.
My feet were always burning up and my wife was always freezing.
I didn't want to do the whole cut the spar web, run the scat tube thru the gear tower routine so I came up with just a bit simpler method to skin both cats.
I made a small box that attaches to the firewall that was thin enough not to interfere with the rudder pedals. Made a scat flange that angled off to the side so get the tubing off to one side of the cockpit and then ran 1 3/4 inch scat back to the z brace under the panel. Got an eyeball outlet and mounted it off to one side to I could blow the air down the cockpit sidewall and into the back seat. I still get plenty of warm air on my feet and my wife is toasty in the rear cockpit. The eyeball vent is far enough to the side and far enough back that it doesn't cook my leg.
For me it's a pretty good solution.
Box that connects to the firewall and covers the inlet air. The actuator cable actually has a slot cut in the bottom so no modification of push/pull cable required.
Mounted on firewall. I did put a hose clamp on after the photo was taken. Adel clamp is to attach misc cables to for security. I used a 1 3/4 inch flange and scat to run back to the eyeball vent. Ran nicely just beside the fresh air vent from the NACA vent on the forward left side of fuse.
Put the eyeball vent on a bracket that I attached to the z brace below instrument panel. This location doesn't blow on my leg and is below my hand on the throttle. Great warm air flows right to the back seat.