Today's Message Index:
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1. 11:48 AM - Tail wiring ()
2. 07:22 PM - Re: Tail wiring (Matt Dralle)
3. 08:56 PM - Re: RV8-List Digest: 1 Msgs - 04/02/12 (Speedy11@aol.com)
4. 09:47 PM - Re: Re: RV8-List Digest: 1 Msgs - 04/02/12 (Robin Marks)
Message 1
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I=99m planning to run my tail wiring through conduit and would
prefer not to use the stuff I got with Van=99s basic wiring kit.
Seems awfully bulky to me; I would prefer something smaller in diameter.
I=99ll have 2 runs; one each for trim and AeroLED
strobe/position light wiring. Any options, including automotive
sources? While I=99m at it, I=99m also looking for the best
way to route the trim wiring, especially getting through the F811
bulkhead. All suggestions thankfully received.
Stan Loer
RV-8 QB
Message 2
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At 11:45 AM 4/3/2012 Tuesday, you wrote:
>I'm planning to run my tail wiring through conduit and would prefer not to use
the stuff I got with Van's basic wiring kit. Seems awfully bulky to me; I would
prefer something smaller in diameter. I'll have 2 runs; one each for trim
and AeroLED strobe/position light wiring. Any options, including automotive
sources? While I'm at it, I'm also looking for the best way to route the trim
wiring, especially getting through the F811 bulkhead. All suggestions thankfully
received.
>
>Stan Loer
>RV-8 QB
Hi Stan,
Attached are some pictures of my RV-8 tail cone with the wiring bundle going back
to the empennage. I have the GS/VOR antenna coax, ELT antenna coax, two bundles
for the dual Magnometers, static air line, and the elevator trim motor and
position wires in a bundle along the left longeron at the top. I used spiral
wrap to bundle the whole thing together then a few wire ties to hold it in
place. Similar to this on Digikey:
http://search.digikey.com/us/en/products/SW43%20BK008/ASW43-25-ND/1522507
It comes in a variety of diameters and I use it all over to tie bundles of wire
together to make things neater and stronger. If you want to add another wire
down the road, just unwrap it add the wire, and wrap it back up. They even have
a Teflon version that works great around the engine cylinders.
Recommend.
Matt
-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 80+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
Message 3
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Subject: | Re: RV8-List Digest: 1 Msgs - 04/02/12 |
You didn't use a plenum?
The only James cowls I've seen on RVs use the James plenum or a custom made
one.
I suppose one could use baffles, but it seems to defeat the purpose of
controlling the airflow so as to reduce drag.
I assume you are referring to the transition from intake opening to the
inside upper cowl surface.. You could make some ramps to smooth the airflow
during transition. If fact, I think you would want to have some type of
transition ramp otherwise the airflow will become very turbulent just inside
the intake thus creating excessive drag and reducing cooling.
I didn't use the James cowl but I made a plenum with upper and lower ramps
to direct the airflow. I also made a removable, resizeable air dam in
front of #2 cylinder that is easy to adjust to change temps. You can take a
look on my web site at rv-8a.net.
Stan Sutterfield
In a message dated 4/3/2012 3:02:40 A.M. Eastern Daylight Time,
rv8-list@matronics.com writes:
Does anyone have photos of a Baffle system used with a James cowl? I have o
ne on my 8A (works well) but the transition could be a lot better and I am
looking for ideas.
Thanks,
Robin
Message 4
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Subject: | Re: RV8-List Digest: 1 Msgs - 04/02/12 |
Stan,
I am very familiar with your work good (speed) doctor!
I had a plenum on 8A. Worked fine but began to eat itself up. I have a FG p
lenum on my -10. Hate that one too! I am d.o.n.e with plenums.
We swapped out the plenum for a baffle system on the 8A and used the same i
nlets from the plenum for the new system. I am MUCH happier with this set u
p. Fresh out of the box I am getting great temps and speed with none of the
plenum issue (mostly access). And the baffles are not closed to sealed yet
. Again glad I mad the change.
My problem is that the inlets we built are all FG and they need a bit of re
inforcement as one got crushed by a hose clamp and the other is a bit misal
igned due the new baffles and a fresh engine. BTW the engine is and 200 Hp
IO-360 and it rips!
I was looking for any ideas out of the box. I will still continue to review
what's out there but I think we have decided to trim back and reinforce ou
r units. Make a longer flex transition piece and see how that works out.
I have a similar resizable air dam system on both my RV's. Think I got the
idea from you...
Thanks,
Robin
From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@mat
ronics.com] On Behalf Of Speedy11@aol.com
Sent: Tuesday, April 03, 2012 8:53 PM
Subject: RV8-List: Re: RV8-List Digest: 1 Msgs - 04/02/12
You didn't use a plenum?
The only James cowls I've seen on RVs use the James plenum or a custom made
one.
I suppose one could use baffles, but it seems to defeat the purpose of cont
rolling the airflow so as to reduce drag.
I assume you are referring to the transition from intake opening to the ins
ide upper cowl surface.. You could make some ramps to smooth the airflow d
uring transition. If fact, I think you would want to have some type of tra
nsition ramp otherwise the airflow will become very turbulent just inside t
he intake thus creating excessive drag and reducing cooling.
I didn't use the James cowl but I made a plenum with upper and lower ramps
to direct the airflow. I also made a removable, resizeable air dam in fron
t of #2 cylinder that is easy to adjust to change temps. You can take a lo
ok on my web site at rv-8a.net.
Stan Sutterfield
In a message dated 4/3/2012 3:02:40 A.M. Eastern Daylight Time, rv8-list@ma
tronics.com<mailto:rv8-list@matronics.com> writes:
Does anyone have photos of a Baffle system used with a James cowl? I have o
ne on my 8A (works well) but the transition could be a lot better and I am
looking for ideas.
Thanks,
Robin
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