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03-02-2013, 11:41 PM
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Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 699
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Quote:
Originally Posted by GrayHawk
Also since this is on the carburetor side of the air filter, what type of epoxy was used?
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I used JB Weld. I felt the temps were fairly low here, but I haven't measured it. The air box itself is laid up with West Systems...no signs of any issues so far.
Quote:
Originally Posted by David Paule
When the honeycomb finally fatigues and starts coming apart, what keeps it out of the engine?
Other than that -- nice.
Dave
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The only thing between it and the engine is the carb venturi, so if for some reason it suffered a catastrophic failure it could end up going through the engine. However, the material is tough stuff and extremely rigid. ( I read somewhere it's 2024 T3, but can't find the reference) Back when I was racing, I saw something similar in use on the old Preditor carburetors that became popular for a while among some drag racers. 500 CI at 8000 rpm has gotta be a lot more abusive than our Lyco's
Quote:
Originally Posted by GrayHawk
Change it every condition inspection?
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That's a cheap enough possibility. I only have $50 and a few hours in it.
Quote:
Originally Posted by LifeofReiley
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You are exactly right, it is nothing new. I found all of the links you posted during my research. Fact is, I bet the Ellison version would be a bolt in, but for 90 bucks and the fact it's kinda crude looking, I didn't give it much thought. The honeycomb is supposed to be extremely effective at straightening the air and I felt it would work better than Ellison's.
Quote:
Originally Posted by jrs14855
A couple days ago I posted this somewhere else on the forum. Bart at Aero Sport??? in Canada has some alternative ways of dealing with this. Superior has a sump that improves mixture distribution and Bart makes some further improvements to the Superior sump. If I were to make a flow divider for the top of the air box it would be made of steel. I think the openings can be much larger than 1/8".
Another thing that allegedly works is wrapping the leanest intake pipes with insulation-cooler mixture equals richer mixture.
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I considered trying the Superior sump route, however after reading about distribution issues from turbulent air entering the carb it became clear to me in order to make a manifold modification everything would have to be flowed together on a wet flow bench. The carburetor, air box, even the ram air effect would have an effect on manifold tuning. I could see using a Superior sump with Bart's mods AND using an airflow straightener together as being an awesome combination, possibly nearing fuel injection distribution, course by the time you do all that you could almost buy a fuel injection system  If you want one, which I don't, but that's another story.
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
Last edited by Don Jones : 03-03-2013 at 12:15 AM.
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03-02-2013, 11:58 PM
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Join Date: Sep 2012
Location: Mosinee,WI
Posts: 72
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Quote:
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Another thing that allegedly works is wrapping the leanest intake pipes with insulation-cooler mixture equals richer mixture
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I think you got that temp/mixture thing backwards. Think of what happens when you apply carb heat.
JimS
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03-03-2013, 12:08 AM
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Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 699
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Quote:
Originally Posted by Fred.Stucklen
So where can we purchase this material? I've been looking for this type of solution for a long time.....
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I got it here
http://www.c5racer.com/catalog/c5-c6...aightener.html
Don't let the picture fool you, it's only the material, does not come with the housing.
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
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03-03-2013, 07:00 AM
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Join Date: Jul 2007
Location: Madison, Wisconsin
Posts: 778
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I notice they're selling this as a better flowing alternative to "restrictive" 1/16" honeycomb. 1/8" holes are still pretty small though. Any noticeable decrease in MP with this installed?
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Alan Carroll
RV-8 N12AC
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03-03-2013, 07:12 AM
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Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 699
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Quote:
Originally Posted by Alan Carroll
I notice they're selling this as a better flowing alternative to "restrictive" 1/16" honeycomb. 1/8" holes are still pretty small though. Any noticeable decrease in MP with this installed?
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None at all according to the Skyview data
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
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03-03-2013, 07:23 AM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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Quote:
Originally Posted by Don Jones
None at all according to the Skyview data
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Nice work Don, will brew one up and test with you. 
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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03-03-2013, 07:39 AM
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Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 699
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Quote:
Originally Posted by LifeofReiley
Nice work Don, will brew one up and test with you. 
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That would be awesome. I would love the extra feedback. I also have another prototype I made with different straightening material I am going to have a local friend try. I never tried it because I felt the honeycomb was a better choice. The material is a high temp plastic material thas has small square holes. I salvaged it from an old Bosch airflow sensor.
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
Last edited by Don Jones : 03-03-2013 at 07:43 AM.
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03-03-2013, 06:40 PM
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Join Date: Nov 2007
Location: Waukesha, Wisconsin
Posts: 554
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Great discussion
McMaster Carr has some honeycomb material, search honeycomb.
1/2 inch diameter holes, this is a very interesting thread, can't wait to hear how it plays out.
__________________
Paul 'Bugsy' Gardetto, Col, USAF (ret)
Milwaukee, Wisconsin (Timmerman Field)
N377KG - Flying (250 hrs)
RV-7A, Aerosport O-360, WW200RV
Advanced Flight 5400
Avidyne IFD440
Paint by planeschemer.com
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03-05-2013, 04:38 PM
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Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 699
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Screenshot
Here is a screen shot from Sunday. Now that the weather is warming up I
am having cooling issues. Working on the fix for that now  Gotta get those
wheel pants and gear leg fairings on too.

__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
Last edited by Don Jones : 03-05-2013 at 04:48 PM.
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03-05-2013, 06:27 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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Quote:
Originally Posted by Don Jones
Here is a screen shot from Sunday. Now that the weather is warming up I
am having cooling issues. Working on the fix for that now  Gotta get those
wheel pants and gear leg fairings on too.

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This change happened after the install? Seem like you're in slow cruise mode? 
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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