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  #11  
Old 09-19-2011, 12:35 AM
chevy's Avatar
chevy chevy is offline
 
Join Date: Apr 2007
Location: Australia, QLD
Posts: 41
Default Wow

Wow that's pretty good.

Can you attempt mine
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RV7 #72135
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  #12  
Old 09-19-2011, 07:11 AM
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DanH DanH is online now
 
Join Date: Oct 2005
Location: 08A
Posts: 7,614
Default

Very nice work Chris.

Couple notes...stuff learned in a year with mine.

I'd suggest cutting back the length of the aluminum intake diffusers and increasing the length of the silicone rubber. The engine case torque reaction is significant, and adding length to the silicone tube will reduce load on the aluminum parts. My intakes are glass reinforced urethane. Your unreinforced silicone should give a bit more, a plus.

Same or related issue...make sure you have at least 1/2" cowl clearance at those upper front corners. Your parallel valve heads are easier to package in this regard so it may not be an issue. My angle valve head offers less clearance to work with in the RV8 cowl. I thought it had enough clearance but it still bumps on start-up or rough running.
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  #13  
Old 09-19-2011, 07:37 AM
Bob Axsom Bob Axsom is offline
 
Join Date: Mar 2005
Posts: 5,685
Default It is a beautiful piece of work

It is a beautiful piece of work and I'm sure you will refine things to account for unforseen stresses as you encounter them. I'm not so sure that some things like the small tab of the rear right side baffle component riveted with two rivets to the forward component is going to hold up for example. I can't see the advantage of the independently closed top plenum and I still use the underside of the top cowl to close mine. I have blast tubes to the mags like you do and a cabin heat port but not the alternator blast tube. I do have my oil cooler mounted on the baffle behind cylinder number 4 instead of the very large duct you have going to your seperately mounted oil cooler. The volume of the plenum independent of the cowl is necessarily smaller and as experienced above with the best of care in development, it may hit the cowl during operation. When I prepare my plane for racing I have cover plates for racing that I install over the mag blast tube and heater ports and I have measured a slight increase in speed.

I know you are at the beginning of your development and I expect you to have a lot of fun refining the design/configuration.

Bob Axsom
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  #14  
Old 09-19-2011, 09:44 AM
nucleus nucleus is offline
 
Join Date: Sep 2006
Location: Bozeman, Montana
Posts: 857
Talking Sealed Plenum Advantages

Quote:
Originally Posted by Bob Axsom View Post
I can't see the advantage of the independently closed top plenum and I still use the underside of the top cowl to close mine.
I see the advantages as not having your cowling being constantly beat on by the rubber baffling and better sealing.

Hans
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  #15  
Old 09-19-2011, 09:45 AM
Conifer Conifer is offline
 
Join Date: Mar 2010
Location: Colorado
Posts: 8
Default

Very nice plenum. Do you have also a 4" Scat on the exit side of the oil cooler.In the affirmative how far down did you carry the scat tube: between the exhaust pipe ?
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  #16  
Old 09-19-2011, 12:42 PM
1Oldguy 1Oldguy is offline
 
Join Date: Aug 2010
Location: Guthrie Oklahoma
Posts: 65
Thumbs up Firewall

Very nice but that firewall is outa sight . Out standing.
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  #17  
Old 09-19-2011, 01:33 PM
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BSwayze BSwayze is offline
 
Join Date: Jul 2007
Location: Portland, Oregon
Posts: 935
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Very, very nice work! You've really raised the bar for those of us looking forward to this part of the project. I'm anxious to hear your performance numbers. Please keep posting.
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  #18  
Old 09-19-2011, 02:05 PM
NYTOM NYTOM is offline
 
Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,002
Thumbs up Ooooo! That's nice

Quote:
Originally Posted by flickroll View Post
You could go in business selling that! I'll be your first customer
I got dibs on second.
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Classic "Short Tail Six" A Model N822PM (Res)
99% done, 1% to go! Oh so close!
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  #19  
Old 09-19-2011, 02:30 PM
BillFear BillFear is offline
 
Join Date: Oct 2007
Location: Sherrills Ford, NC (Lake norman area)
Posts: 433
Default Wow!

and to think, we were just going to re-do our baffle material at conditional. Very nice work! Which oil cooler did you use, can you post a couple pictures that show that setup better please?
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Lake Norman, NC (14A)
RV7a N705RP (no longer own)
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  #20  
Old 09-19-2011, 03:31 PM
NYTOM NYTOM is offline
 
Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,002
Default Hmmmmmm

After studying your photos I remembered I too have a TMX-360.
How much for the used cardboard templates?
I like yours even better than the Kevlar ones. Outstanding!
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Classic "Short Tail Six" A Model N822PM (Res)
99% done, 1% to go! Oh so close!
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