Donaldson air filter

[Brian2034]

Can someone provide the part # or a reference chart for the Donaldson filters for the Mooney, specifically for the C model

[EricJ]

11 minutes ago, Brian2034 said:

Can someone provide the part # or a reference chart for the Donaldson filters for the Mooney, specifically for the C model

Go to the Donaldson filter page at aircraftspruce.com, and in the documents section of the page (toward the bottom) there is a Brochure and Application guide that shows part numbers for various aircraft.   

https://www.aircraftspruce.com/catalog/eppages/donaldAirFilter.php

 

[Brian2034]

Didn't think of Spruce!

Tried to good old Google but didn't get very far.

Thanks

[AJ88V]

Donaldson publishes that their air filters are among the least restrictive 

https://www.donaldsonaerospace-defense.com/library/files/documents/pdfs/048554.pdfhttps://www.donaldsonaerospace-defense.com/library/files/documents/pdfs/048554.pdf

P10-7172      (OEM part #13219)
M18C .....................................ALL
M20 .......................................ALL
M20A-D, G............................ALL

https://www.aircraftspruce.com/catalog/pnpages/08-06024.php

The Tempest AA10-7172 also fits and is a little cheaper.  It's also synthetic filter material and washable.

https://www.aircraftspruce.com/catalog/eppages/tempest_airfilters_08-17233.php

 

[Pinecone]

Low restriction can mean less filtering.

So, what is the recommended filter for Mooneys?

 

[Marc_B]

1 hour ago, Pinecone said:

So, what is the recommended filter for Mooneys?

I think this is about the same type of question as asking "what's the recommended OIL for Mooneys?"

But it seems like Donaldson air filters are a good way to go and are what I use.  Here's a previous thread discussing pros and cons of filters and personal filter choice.

 

[Slick Nick]

3 hours ago, Pinecone said:

Low restriction can mean less filtering.

So, what is the recommended filter for Mooneys?

 

I've got a Donaldson in my J. I believe it's actually referenced in the POH as a factory option.

[AJ88V]

I would probably not recommend a low-restriction air filter for a dusty climate like the southwest US or desert California.  On the green East Coast, however......

YMMV

 

[EricJ]

2 hours ago, Slick Nick said:

I've got a Donaldson in my J. I believe it's actually referenced in the POH as a factory option.

It's in the TCDS, along with the Bracket and Air Maze.    The Air Maze part number doesn't appear to be available any more. 

 

[Brian2034]

I agree a less restrictive filter definitely means less filtration!

We loss a diesel engine because of a less restrictive oiled filter, mind you this was in Arizona the dusty state!

I would have no problem using a Donaldson filter in an aircraft especially seeing how my aircraft is located in eastern Canada. If  the aircraft was located in a dusty area I would probably not use a less restrictive filter.

[Slick Nick]

3 hours ago, Brian2034 said:

I agree a less restrictive filter definitely means less filtration!

We loss a diesel engine because of a less restrictive oiled filter, mind you this was in Arizona the dusty state!

I would have no problem using a Donaldson filter in an aircraft especially seeing how my aircraft is located in eastern Canada. If  the aircraft was located in a dusty area I would probably not use a less restrictive filter.

The logic is flawed I’m afraid. A less restrictive filter does not mean inferior filtration. 

Some, like the Donaldson, use a different design in the way the pleats are arranged, allowing more surface area on the media. Imagine a screen door, vs a screen on a small window. The holes in the screen are the same size, thus filtering the same size particles, but the door will flow a lot more air through it because it’s got a larger surface area. 

Edited October 1, 2024 by Slick Nick

[EricJ]

3 hours ago, Brian2034 said:

I agree a less restrictive filter definitely means less filtration!

We loss a diesel engine because of a less restrictive oiled filter, mind you this was in Arizona the dusty state!

I would have no problem using a Donaldson filter in an aircraft especially seeing how my aircraft is located in eastern Canada. If  the aircraft was located in a dusty area I would probably not use a less restrictive filter.

Generally the "less restrictive" filters are the cotton-gauze filters like K&N, etc.    Paper filters tend to be a little more restrictive but that can be mitigated by tightening the pleats to make more surface area, but that has an ultimate diminishing return as well.   

For some Mooneys the main choices are an oiled-foam filter like a Bracket, or a Donaldson.     My airplane had a Bracket filter when I bought it, and they're very inexpensive to replace every year at annual, but they make an awful mess around the intake that I just got tired of dealing with.   Everything stays clean with the Donaldson and it's been in there a few years now and still looks great, and I'm in AZ.   It is cleanable/servicable so can last a long time if you take care of it.   I suspect it is potentially less restrictive than the Bracket, and certainly presents less contamination hazard to the fuel servo, imho.

[Brian2034]

Well

From my off road (dune buggy) experience in Arizona and my tow vehicle, I can say without a doubt the popular gauze with oil filter, most definitely flows better than a stock paper filter.

But it DOES allow more dust to enter the intake, that’s my experience
We went back to a stock filter in the tow vehicle and never had dust in the intake past the filter again. I’m not mentioning the brand because I don’t want repercussions.

In an aircraft I wouldn’t have any concerns unless I was operating from a very dusty un-paved runway