Cabin heat with an Aerovee - another approach
Posted: Sun Dec 17, 2023 5:56 pm
Hi all,
If you remember I was chasing hot oil issues this summer. I came up with a plenum behind the oil cooler, and two 1.75" scat tubes going to reverse scoops on the bottom of the cowl.
(edit: I had the wrong link here before)
viewtopic.php?f=7&t=7279&start=20
Then winter came and all my temperatures were too cold. I did some blocking of the air inlet and got the temps toasty, but well within limits.
viewtopic.php?f=7&t=7498
Seems to me that I could intercept some of that air leaving the oil cooler and heat the cabin. I started making a heater valve body out of 0.016 aluminum.
For the flapper valve, I am going to use stainless. I also want the hinge to be stainless for fire safety. I bought these hinges:
https://www.amazon.com/gp/aw/d/B093LKF4JL
They are a pain to drill. The hinge is a little sloppy but a real hinge pin can be substituted and it tightens things up.
I made a prototype setup using an aluminum flapper valve. On either side I bent a small return flange. It took me a couple of tries to figure out sizing so it moves freely but has minimal gaps. Video:
My concept is to have the bowden cable inside and work directly on the door. When closed the hot air will pass right through to the reverse scoop. When all the way open all the airflow will go into the cabin. I'll have a deflector to push the air down and serve as a mount for the bowden cable.
Old threads for reference:
viewtopic.php?f=7&t=4730
viewtopic.php?f=7&t=5366&p=40644
viewtopic.php?f=8&t=6505
If you remember I was chasing hot oil issues this summer. I came up with a plenum behind the oil cooler, and two 1.75" scat tubes going to reverse scoops on the bottom of the cowl.
(edit: I had the wrong link here before)
viewtopic.php?f=7&t=7279&start=20
Then winter came and all my temperatures were too cold. I did some blocking of the air inlet and got the temps toasty, but well within limits.
viewtopic.php?f=7&t=7498
Seems to me that I could intercept some of that air leaving the oil cooler and heat the cabin. I started making a heater valve body out of 0.016 aluminum.
For the flapper valve, I am going to use stainless. I also want the hinge to be stainless for fire safety. I bought these hinges:
https://www.amazon.com/gp/aw/d/B093LKF4JL
They are a pain to drill. The hinge is a little sloppy but a real hinge pin can be substituted and it tightens things up.
I made a prototype setup using an aluminum flapper valve. On either side I bent a small return flange. It took me a couple of tries to figure out sizing so it moves freely but has minimal gaps. Video:
My concept is to have the bowden cable inside and work directly on the door. When closed the hot air will pass right through to the reverse scoop. When all the way open all the airflow will go into the cabin. I'll have a deflector to push the air down and serve as a mount for the bowden cable.
Old threads for reference:
viewtopic.php?f=7&t=4730
viewtopic.php?f=7&t=5366&p=40644
viewtopic.php?f=8&t=6505