bus driver Posted January 5, 2015 Report Posted January 5, 2015 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 Quote
N201MKTurbo Posted January 5, 2015 Report Posted January 5, 2015 That is for radio cooling. The lever is to shut it off in the rain so you don't short out the radios. Nobody uses it any more, they use avionics fans. Quote
Andy95W Posted January 5, 2015 Report Posted January 5, 2015 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) Quote
Bob_Belville Posted January 5, 2015 Report Posted January 5, 2015 If there was a change between '64 and '66 you both may be right... on my '66E it was for avionics cooling and has been disconnected for many years. Quote
N601RX Posted January 5, 2015 Report Posted January 5, 2015 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. Quote
Andy95W Posted January 5, 2015 Report Posted January 5, 2015 I've owned a 64 and (previously) a 67. They are different. The 64 system is simpler but not quite as effective. Quote
bus driver Posted January 5, 2015 Author Report Posted January 5, 2015 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) Quote
Andy95W Posted January 5, 2015 Report Posted January 5, 2015 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. 1 Quote
Guest Posted January 6, 2015 Report Posted January 6, 2015 You hold and A&P? Not practicing I take it. Clarence Quote
bus driver Posted January 6, 2015 Author Report Posted January 6, 2015 You hold and A&P? Not practicing I take it. Clarence 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. Quote
Marauder Posted January 6, 2015 Report Posted January 6, 2015 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. 1 Quote
Guest Posted January 6, 2015 Report Posted January 6, 2015 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 Quote
scottfromiowa Posted January 6, 2015 Report Posted January 6, 2015 Except for the lesbian's. Whatever makes you happy in your bedroom is O.K. by me. Different strokes and pokes for different folks... Quote
Guest Posted January 7, 2015 Report Posted January 7, 2015 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 Quote
scottfromiowa Posted January 7, 2015 Report Posted January 7, 2015 Sounds like a personal problem Doc. Quote
Marauder Posted January 7, 2015 Report Posted January 7, 2015 Bad Timmy! Get back in your thread! Quote
Marauder Posted January 7, 2015 Report Posted January 7, 2015 And yes, I was one of those kids who stuck a stick into a bee hive to see what it would do... 1 Quote
scottfromiowa Posted January 7, 2015 Report Posted January 7, 2015 And yes, I was one of those kids who stuck a stick into a bee hive to see what it would do... I was the kid talking the other kid into sticking a bee hive. 1 Quote
triple8s Posted January 7, 2015 Report Posted January 7, 2015 I was the kid talking the other kid into sticking a bee hive. By God I believe him! Quote
scottfromiowa Posted January 7, 2015 Report Posted January 7, 2015 Maybe that is why they don't call... Quote
scottfromiowa Posted January 7, 2015 Report Posted January 7, 2015 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. Quote
takair Posted January 7, 2015 Report Posted January 7, 2015 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. 1 Quote
bus driver Posted January 8, 2015 Author Report Posted January 8, 2015 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? 1 Quote
Andy95W Posted January 8, 2015 Report Posted January 8, 2015 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. 1 Quote
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