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Fresh air NACA intake on copilots side of 64' M20E

bus driver
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bus driver Explorer

bus driver

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I just baught a 64' M20E and am new to the Mooney site. I'm an A&P, but have done limited work on the M20 series. On the copilots side, there's a manual arm that seems to be connected to the NACA intake on the right side. Where does that air go to and what does that valve do?

 

Many thanks. Bus Driver

Andy95W Grand Master

Andy95W

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Sorry to disagree, but that is not for radio cooling. On our '64 models (my C and your E are the same in this respect) that NACA intake goes to the main mixing box just above the co-pilot's feet. This is also the point where heated air is introduced to the system through the firewall from the engine compartment. From this point the mixed air is fed to the pilot's side box above your feet.

The manual valve/arm you're talking about simply allows the pilot to vary the amount of cool air that is introduced to the system. It is connected to the push/pull control just to the left of your ram air intake control to the left of your throttle.

Andy

(also a bus driver)

N601RX Grand Master

N601RX

Posted
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The 67 F has a small about 1" valve that cuts the air off to the radio stack. It is connected directly to the side scoop.  I disconnected it and added a fan. My heater mixer is on the firewall.

bus driver Explorer

bus driver

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OK, well there are varying answers here, so I'll have to do some more investigating. Can you tell me this: Is the air cut off with the arm up or down. Also, if that mixes with the hot air, where does the source come from for my cold air which has a cabin air push/pull control near the cabin heat and RAM air. I know on some other a/c, like Cessna's, you have multiple cold air sources. Is that the case with Mooney's. I know about the overhead fresh air with the Wemacs.

 

Thanks. Bus Driver. (aka glorified switch flipper)

Andy95W Grand Master

Andy95W

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Posted

Also, if that mixes with the hot air, where does the source come from for my cold air which has a cabin air push/pull control near the cabin heat and RAM air.

It is the same source. If you pull out your heat knob, it mixes. If you don't pull your heat knob, it is just outside/cold air.

The air control valve is a simple slider on the right side of the mixer box above the copilot's feet. As the slider moves up it allows more outside air from the NACA duct into the mixing box.

Not sure about the "varying answers". Page 172 in your Parts Catalog, Fig. 64 shows it pretty well.

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Marauder Grand Master

Marauder

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Nice! Dude, I just got the plane 4 days ago. I haven't turned a wrench on it yet and don't have the manuals, yet.

Don't mind him, he's still irritated that Timmy lives in the United States and not Canada. ;)

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Guest

Guest

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Posted

Don't mind him, he's still irritated that Timmy lives in the United States and not Canada. ;)

Timmy would not enjoy it in Canada. Universal (Socialist, Communist, leftist, Liberal) health care for all, no NRA, restrictive gun ownership laws, and a country headed by a Conservative government and here in Ontario our head of government is shockingly a Liberal lesbian.

Clarence

Guest

Guest

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Except for the lesbian's. Whatever makes you happy in your bedroom is O.K. by me. Different strokes and pokes for different folks...

A former Liberal Canadian Prime Minister said something to the effect the "there is no room for the state in the bedrooms of the nation". Sounds like your thoughts are quite liberal Scott, now I'm really confused!?

Clarence

scottfromiowa Grand Master

scottfromiowa

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I wish someone would develop a vintage "KIT" to install an eyeball ram-air vent on the co-pilot side intake. I have the eyeball, but there is no good mount that is flush with the rolled shape of the vent. Would be nice in summer to have another duct of cool air at your or your co-pilot's easy control.

takair Grand Master

takair

Posted
Posted

OK, well there are varying answers here, so I'll have to do some more investigating. Can you tell me this: Is the air cut off with the arm up or down. Also, if that mixes with the hot air, where does the source come from for my cold air which has a cabin air push/pull control near the cabin heat and RAM air. I know on some other a/c, like Cessna's, you have multiple cold air sources. Is that the case with Mooney's. I know about the overhead fresh air with the Wemacs.

 

Thanks. Bus Driver. (aka glorified switch flipper)

My 64 has the valve too. If you look at the scoop, from the outside, you can just see up into the one inch tube and see the valve. I can never recall which way to flip the lever without looking at the hole. On mine, the hole is plumbed to a plastic, OEM, cooling plenum that is mounted behind the radio stack and blows air over the radios. This valve is different than the much bigger warm/cold air mixing box that is directly between the co pilots legs. I suspect many people don't even know this other valve exists since it is usually partially hidden by the interior panel. If you are getting extra cold air on your feet during winter, it is probably open.
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bus driver Explorer

bus driver

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Oh, we're back on thread. Cool. Thanks Rob. I looked in a Mooney Maint. Manual I got off www.67m20e.com and can't find page 172 or figure 64. The manual has chapters 1 thru 8. Anyone have another source for E Manuals?

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Andy95W Grand Master

Andy95W

Posted
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My 64 has the valve too. If you look at the scoop, from the outside, you can just see up into the one inch tube and see the valve. I can never recall which way to flip the lever without looking at the hole. On mine, the hole is plumbed to a plastic, OEM, cooling plenum that is mounted behind the radio stack and blows air over the radios. This valve is different than the much bigger warm/cold air mixing box that is directly between the co pilots legs. I suspect many people don't even know this other valve exists since it is usually partially hidden by the interior panel. If you are getting extra cold air on your feet during winter, it is probably open.

Odd, my 64 doesn't have that, or it was modified long ago and not noted in the logs. Also, the Parts Manual diagram doesn't show it or any of it's associated parts.post-11090-0-46443500-1420694763_thumb.j

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