Baffles for M20K 231

[chrisk]

Some of the baffles (the aluminum pieces) are looking a little tired in my M20K 231.   Where is a good place to source new ones? 

[Igor_U]

MSC should be able to order from the factory. LASAR has some available and listed on their website but not sure if are for M20K. You would need an IPC and fin a p/n.

BTW, these are not cheap! I might order a couple of parts they have to replace on my M20F but mostly, I'll  do repairs on my old ones.

[tmo]

Wouldn't these qualify for an Owner Produced Part if for no other reason than to get them trimmed exactly right? If these are what I think they are, making them can't be too difficult, can it?

[kortopates]

Wouldn't these qualify for an Owner Produced Part if for no other reason than to get them trimmed exactly right? If these are what I think they are, making them can't be too difficult, can it?

Actually sheet metal fabrication of baffling is standard A&P stuff, your maintainer needs no involvement from you and of course an owners with the skills and equipment can do it supervised.

That said, even though my labor is free, there is no way I am going to take the time to start with raw materials when I can get them from the factory and if your paying for a mechanic to do it it’ll be cheaper to use what you can get from the factory as well; except on the simplest of pieces - but those are pretty cheap anyway. But on the more complex K baffling pieces on side, you won’t be able to purchase the complete assembly from Mooney and will need to do some sheet metal fabrication anyway - unless things have recently changed. But generally, you never want the complete assembly because it includes the flexible silicone baffling too. But you’ll generally want your part as complete on the sheet metal as you can get. The more complex pieces can take a lot of work and time. But all this underlines how important it is to have and be able to understand your IPC when sourcing baffling.

 

 

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[Guest]

This might help.  For most of the parts it’s pretty basic sheet metal skills.  Got an EAA chapter nearby, they have some tools and good skills.

Clarence

 

[M20F-1968]

On 12/23/2020 at 2:51 PM, tmo said:

Wouldn't these qualify for an Owner Produced Part if for no other reason than to get them trimmed exactly right? If these are what I think they are, making them can't be too difficult, can it?

I have been there, done that in my 68 F.  With the turbo normalizer everything is shoehorned into the cowling.  The 231 is likely similar.  Yes, the baffling can be made, and likely can be made better than the factory version, however the tolerance are tight, which means work goes slowly taking and fitting constantly.  Some parts can not be fit tested without the cowling on, so expect to spend a great deal of time on this project.  It is not a simple as it looks.

John Breda

[chrisk]

On 12/23/2020 at 3:43 PM, kortopates said:

Actually sheet metal fabrication of baffling is standard A&P stuff, your maintainer needs no involvement from you and of course an owners with the skills and equipment can do it supervised.

That said, even though my labor is free, there is no way I am going to take the time to start with raw materials when I can get them from the factory and if your paying for a mechanic to do it it’ll be cheaper to use what you can get from the factory as well; except on the simplest of pieces - but those are pretty cheap anyway. But on the more complex K baffling pieces on side, you won’t be able to purchase the complete assembly from Mooney and will need to do some sheet metal fabrication anyway - unless things have recently changed. But generally, you never want the complete assembly because it includes the flexible silicone baffling too. But you’ll generally want your part as complete on the sheet metal as you can get. The more complex pieces can take a lot of work and time. But all this underlines how important it is to have and be able to understand your IPC when sourcing baffling.

 

 

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I had made a call to Lasar and inquired about part number 22 in the diagram.  They didn't have it in stock, but mentioned I might be able to order it from the factory.  They mentioned the part was expensive.  I still can't believe the price they quoted.  I must have heard it incorrectly, but it was north of 3K.