I spend maybe 10 hours designing and building a Heater Damper Door and Control. See the pictures for proof of how it works. It was 5 - 7 degees on the ground when I took off this morning. Warmer at altitude. About -3 C at altitude. I was dressed warm, but I had to turn the heat down - SERIOUSLY, it was getting very warm inside. The door effectively blocks off about 90 - 95% of the air flow thru the duct when fully closed. I offset the door slightly so it wants to open itself, not close itself. The detents in the choke cable barely hold it, but does. Works FANTASTIC ! Very happy with it. Takes some serious work to design/make the plate ( door ). I have many more pictures.
John Bender
John Bender
![RV-12HeaterDamperDoor100_1327.jpg](/community/proxy.php?image=http%3A%2F%2Fi568.photobucket.com%2Falbums%2Fss124%2FJBender_photos%2FRV-12HeaterDamperDoor100_1327.jpg&hash=9e7c6e94534a9928288392cf5f18dfe6)
![RV-12HeaterDamperDoor100_1346.jpg](/community/proxy.php?image=http%3A%2F%2Fi568.photobucket.com%2Falbums%2Fss124%2FJBender_photos%2FRV-12HeaterDamperDoor100_1346.jpg&hash=114188afaf9c3df216b6fef66a053676)
![RV-12HeaterDamperDoor100_1342.jpg](/community/proxy.php?image=http%3A%2F%2Fi568.photobucket.com%2Falbums%2Fss124%2FJBender_photos%2FRV-12HeaterDamperDoor100_1342.jpg&hash=e28c5bb34f84111078216f71164bf0af)
![RV-12HeaterDamperDoorTesting100_136.jpg](/community/proxy.php?image=http%3A%2F%2Fi568.photobucket.com%2Falbums%2Fss124%2FJBender_photos%2FRV-12HeaterDamperDoorTesting100_136.jpg&hash=b7e91b9df2d9e13795a8d2212e09383e)
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