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Unclerap
 Post subject: Air Filter Assy
PostPosted: Tue Jul 24, 2018 3:11 pm 
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Joined: Mon Mar 19, 2018 4:23 pm
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My T18 has a plastic air filter holder, from my research it is a Matney. It's broken and I want to replace it with a Brackett. It appears the Matney is dimensionally similar to the BA 4210 used on Grummans. Anybody have a suggestion, guidance, etc?

thanks

Rap


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Jeff J
 Post subject: Re: Air Filter Assy
PostPosted: Wed Jul 25, 2018 8:01 am 
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Location: eastern OK
Mine has a BA-4106 if that helps.


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Thorp T18
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68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Binder
 Post subject: Re: Air Filter Assy
PostPosted: Wed Jul 25, 2018 12:56 pm 
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Joined: Thu Sep 01, 2016 10:50 pm
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I'm going to jump in here to ask questions as well. Jeff, what intake assembly do you have?

I have a round car based intake and it's not filtering well. I want to change it to something nice and new like what everyone else is using. I will have a post for it.


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Jeff J
 Post subject: Re: Air Filter Assy
PostPosted: Wed Jul 25, 2018 5:44 pm 
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I am not 100% sure because I am not where I can check the receipts included in the aircraft file but I think it is this one:
http://www.aircraftspruce.com/catalog/e ... ckkey=3787

I was thinking that I would like to change. There is no seal between my cowl and the air filter.

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Thorp T18
O-320-B3B (160 HP)
68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Unclerap
 Post subject: Re: Air Filter Assy
PostPosted: Wed Jul 25, 2018 5:50 pm 
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Joined: Mon Mar 19, 2018 4:23 pm
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Jeff, thanks. Brackett 4210 and 4106 appear to be identical dimensions. Don't know the diff. Still researching.


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Binder
 Post subject: Re: Air Filter Assy
PostPosted: Thu Jul 26, 2018 7:49 pm 
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Jeff J wrote:
I am not 100% sure because I am not where I can check the receipts included in the aircraft file but I think it is this one:
http://www.aircraftspruce.com/catalog/e ... ckkey=3787

I was thinking that I would like to change. There is no seal between my cowl and the air filter.

Thanks for the link, that looks perfect!

That's one thing I was thinking would cause a problem. Pressurized air is getting forced into my lower cowl thus causing less Delta differential for my cylinders. Mine has a gap around the intake and I was wanting to seal it up because I think the ram air is reducing my cooling to the cylinders. This also has a much better carb heat portion. I'll have to find a way to measure my cowl distance and then a way to seal it to the lower cowl to keep air from entering my lower cowl.

My other thought was to run a duct from the back of my baffling like david read did in order to completely remove the scoop and thus reduce drag on this little 290 powered ship!


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Jeff J
 Post subject: Re: Air Filter Assy
PostPosted: Sun Jul 29, 2018 8:46 am 
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Location: eastern OK
My gap is pretty small so it may not be worth the effort to seal up. I would hate to change it just to have the engine and/or accessories start hitting the cowl again. My setup won’t support it but somewhere in these web pages are pictures of a setup using wetsuit material to connect the cowl to the airbox that I thought would work well.

David’s setup should work good too. I don’t think I have seen pictures of it and I never made it down to meet him.

_________________
Thorp T18
O-320-B3B (160 HP)
68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Bill Williams
 Post subject: Re: Air Filter Assy
PostPosted: Sun Jul 29, 2018 12:00 pm 
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Don't remember the name ,but the race car folks use a rubber round tube molded to a thin channel that slips over the edge of aluminum


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Binder
 Post subject: Re: Air Filter Assy
PostPosted: Mon Jul 30, 2018 5:52 pm 
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Joined: Thu Sep 01, 2016 10:50 pm
Posts: 214
Bill Williams wrote:
Don't remember the name ,but the race car folks use a rubber round tube molded to a thin channel that slips over the edge of aluminum


I might have to fiberglass in a round section and just hook scat tubing to it


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Unclerap
 Post subject: Re: Air Filter Assy
PostPosted: Sat Aug 04, 2018 2:38 pm 
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Joined: Mon Mar 19, 2018 4:23 pm
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Closing the loop to my question: The Brackett 4210 is dimensionally identical to the Matney. Fits perfectly.

Rap


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