Heat in 67 M20F Too hot unless you mix with cold - any other easy ideas?

[furledd]

Just wondering if anyone has come up with a creative solution to the problem of when you run only the HEAT control, you only need to crack it just a bit and you get VERY HOT air coming in, in fact it warped the plastic in the center vent on me one flight.

 

I found that if you crack the heat control and also open the VENT control you can get a reasonable warm temperature, but am concerned my partners wont be so attentive to this and damage more inteior plastic

 

Anyone come up with a way to create a simple temperature regulator, or at least a way to open the HEAT control fully and have warm but not blazing hot air without carefully mixing it with the vent control?  Perhaps bleed in some outside air under the cowl by creating a hole for cooler air in the heat supply hose from the heat box around the exhaust? 

 

One other question is on DEFROST - is the only way to get more defrost on the windshield to close all the other vents?

In other planes there is usually a separate defrost control, but not in the Mooney - or at least mine.

Any creative solutions out there?

 

P.S. Any simple ideas for getting that WEMAC BALL VENT to 100% close - always a trickle of cold air on my knees 

 

Ok, maybe you can tell I just took about an 8 hour flight over christmas  

 

Dwight

 

[N201MKTurbo]

I think you have found the secret to operating the heater.

As far as the Wemac vent, lubricate it. It will work much better.

[bus driver]

Some of those Wemacs have a rubber seal around the outside edge of the round piece inside. That seal will deteriorate over time, and allows air to pass through the valve. I have some off an old C-310 that this happened. If they have the seal, disassemble, clean and try an appropriately sized rubber seal. Worked for me.

[duke]

According to poh for max defrost, open vent completly and add hot air to it. That works ok. I run vent wide open and set heat vent to get the temp i want for cabin heat i want. This systrm works better than the heat in my m20s.

[M20F-1968]

Bus Driver:

I have a wemac from a M20E which is in excellent condition if you need it. You can contact me at johnabreda@yahoo.com or call me at 617-877-0025.

Thanks,

John Breda

[bus driver]

I'm good John, but thank you sir. My Wemacs are in great shape. The 64' E  I just bought is in pristine condition. One owner since 67' and he was really anal (an engineer) and kept it meticulous. Got it near you, in Fitchburg.