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Posted

On page 6 21-40-00 of the M20J IPC it makes reference to a retrofit kit to add a defroster fan. Google doesn’t turn up much; do these exist? Has anyone done this? I would like to add some more air movement in the ventilation system if possible.  
 

I have a 1978J 24-0471 so I should be eligible by serial number. 
 

Thanks!

Posted

There is a part number, so I’m sure it existed at one time. However, since the M20J has been out of production since 1997, it’s quite likely that Mooney doesn’t have any and the cost to make one might be prohibitive. But any MSC can check with the factory for you. It might be more cost effective to source used parts needed to add the blower from a salvage company.

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Posted

Is your defrost underperforming? I occasionally have issues during ground ops, but that about it. Preheating the cabin helps. If it’s not working sufficiently in flight, there may be more low hanging fruit to go after first.

Posted
7 minutes ago, A64Pilot said:

He’s in Canada and there are places there where it gets insanely cold, maybe he lives in one of those places?

Yeah it's -16° at 2:00 in the afternoon where he's based. That blower fan better be an over achiever.

  • Haha 2
Posted

It’s actually less about the heat in the winter… more for airflow on the ground on hot summer days. 
 

I am doing a panel upgrade and want to put some eyeball vents in the dash; thinking if I tie them into the defroster lines and put a blower I may get some cooling air on the wife and kids in the summer on a hot day. 

But would be useful for defrost on the ground in the winter too perhaps? 

Posted
14 minutes ago, blaine beaven said:

It’s actually less about the heat in the winter… more for airflow on the ground on hot summer days. 
 

I am doing a panel upgrade and want to put some eyeball vents in the dash; thinking if I tie them into the defroster lines and put a blower I may get some cooling air on the wife and kids in the summer on a hot day. 

But would be useful for defrost on the ground in the winter too perhaps? 

That’s a lot of trouble to go to when cracking the door a few inches generates a lot more flow. 
 

I’ve heard good things about the Kool scoop. The late, great @Bob_Belville had a passenger side window installed so that he could have dueling kool scoops for airflow coming through both windows.

IMG_20151201_151757134_HDR.jpg

Posted

I’m well aware I can crack the door and pop the window - but I’d like to consider retrofitting a blower motor so hopefully someone with that experience can pass it on. 
 

When the panel is pulled apart I am going to replace hoses, check connections etc to ensure I’m optimizing what I have. 

Thanks!

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