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08-03-2016, 01:16 PM
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Join Date: Jan 2014
Location: Cedar Hill, TX
Posts: 330
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Quote:
Originally Posted by clutch22
Not many people have chimed in. I'm also interested in what people have done. I've been stalling drilling mine, but I'm about finished with the avionics and will be riveting my panel substructure in soon and would rather install the passthrough prior.
I'm thinking I will use the existing LH hole for my battery cable, install a 1" firesleeve passthrough near the center, and use the RH passthrough hole only if I were to run out of room in the 1" hole. 
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fyi: If you look at the Van's wiring harness plans, they actually drill a different hole next to the skin to run the battery cable through.
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RV-10 in Process
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08-03-2016, 02:19 PM
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Join Date: Mar 2008
Location: Huntsville, AL USA
Posts: 546
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4 on a 7
This is on an RV-7 - but for what its worth I used 4 for electrical. Top "corners" carry EGT/CHT and other engine sensor wires; one near the center top carries Electronic Ignition leads/ mag P-lead; large angled one on the right side carries all power wires.
I also used 3 additional passthroughs like these for the throttle, mixture and prop cables.

__________________
Dan Langhout
2020 =VAF= Dues PAID . . . . .
RV-7 N528DP slow build
First Flight July 26th, 2014
665 hours and counting . . . .
Now based at Moontown (3M5)
Last edited by Dan Langhout : 08-04-2016 at 05:32 PM.
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08-03-2016, 02:24 PM
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Join Date: Jul 2005
Location: Denver, CO
Posts: 295
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Quote:
Originally Posted by flion
I can't see your image but if that is the roughly thumb-sized holes left and right on the firewall, that is indeed what they are intended for. However, I am using sealed CPCs for my passthrough and the extended sleeve (about 3 inches) would have interfered with the motor mount, so I covered the existing holes with riveted stainless steel covers and relocated my openings. My point is that you can relocate things as needed and appropriate for your installations.
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I like the idea if CPCs but can you use them with the thermocouple wire for EGT and CHT?
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// corey crawford
// rv-7a (sold)
// denver, co @ KBJC
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08-03-2016, 02:32 PM
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Join Date: Dec 2010
Location: Culpeper, VA
Posts: 693
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I'm using the SS fire-sleeve pass throughs from ACS you've mentioned. I ended up with one of each size. The interior firesleeve eats up a lot of space. The #2 battery I bring through the existing hole which I enlarged for a bulkhead fitting. The smallest SS pass-through I've got on the top-left of the firewall and will be using for ignition related wires. The 3/4" pass-through I've got in the little slot designed for the heat boxes and alternate air door. The 1" pass-through I've got on the upper right for all the thermo-couple wires and various other engine monitor wires. Van's has you drill another hole for a bulkhead fitting if you position the manifold pressure sensor on the inside. The existing hole on the far right I probably could have used for the 1" SS pass-through but didn't, thinking I would use it for something else. I'm going to plug that one.
Also, if you happened to drill the holes in the stainless recess according to the plans (as I did), you'll find that most of the nice pass-throughs for prop/mixture/throttle cables won't fit because the holes are too close together. I found these on ACS which do fit. I installed them just the other day.
https://www.aircraftspruce.com/catal...algrommets.php
__________________
-Joe Wilbur (N520LW)
Phase II - 11/2017
First flight - 8/2017
RV-10 Build Log
Last edited by jwilbur : 08-08-2016 at 04:15 PM.
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08-03-2016, 02:53 PM
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Join Date: Jan 2014
Location: Cedar Hill, TX
Posts: 330
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I like those SPHERICAL FIREWALL FITTINGs, what size did you order for the three control cables?
Quote:
Originally Posted by jwilbur
I'm using the SS fire-sleeve pass throughs from ACS you've mentioned. I ended up with one of each size. The interior firesleeve eats up a lot of space. The #2 battery I bring through the existing hole which I enlarged for a bulkhead fitting. The smallest SS pass-through I've got on the top-left of the firewall and will be using for ignition related wires. The 3/4" pass-through I've got in the little slot designed for the heat boxes and alternate air door. The 1" pass-through I've got on the upper left for all the thermo-couple wires and various other engine monitor wires. Van's has you drill another hole for a bulkhead fitting if you position the manifold pressure sensor on the inside. The existing hole on the far right I probably could have used for the 1" SS pass-through but didn't, thinking I would use it for something else. I'm going to plug that one.
Also, if you happened to drill the holes in the stainless recess according to the plans (as I did), you'll find that most of the nice pass-throughs for prop/mixture/throttle cables won't fit because the holes are too close together. I found these on ACS which do fit. I installed them just the other day.
https://www.aircraftspruce.com/catal...algrommets.php
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RV-10 in Process
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08-03-2016, 03:03 PM
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Join Date: Jul 2012
Location: Bartlesville, OK
Posts: 237
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Quote:
Originally Posted by Lynnb
fyi: If you look at the Van's wiring harness plans, they actually drill a different hole next to the skin to run the battery cable through.
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I noticed that, but is there a reason not to use this hole for the cable if I plan to add one or two separate passthru's elsewhere for the other wires?
__________________
Andrew Austin
RV-10
-Flying!
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08-04-2016, 08:28 AM
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Join Date: Dec 2007
Location: Flagstaff, AZ
Posts: 2,653
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Quote:
Originally Posted by ccrawford
I like the idea if CPCs but can you use them with the thermocouple wire for EGT and CHT?
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Short answer: yes. Try to plan so that signal (sensor) wires do not share a connector with power wires.
__________________
Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
http://www.mykitlog.com/flion/
EAA Technical Counselor #5357
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08-04-2016, 09:37 AM
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Join Date: Mar 2008
Location: Anacortes, WA
Posts: 823
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Quote:
Originally Posted by Dan Langhout
This is on an RV-7 - but for what its worth I used 4 for electrical. Top "corners" carry EGT/CHT and other engine sensor wires; one near the center top carries Electronic Ignition leads/ mag P-lead; large angled one on the right side carries all power wires.
I also used 3 additional passthroughs like these for the throttle, mixture and prop cables.

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Your photos are not coming thru. Just shows a dash.
__________________
Steve Lynn
RV-7A
Flying Phase I
Anacortes, WA
www.mykitlog.com/sglynn
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08-04-2016, 05:35 PM
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Join Date: Mar 2008
Location: Huntsville, AL USA
Posts: 546
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Should work now.
Quote:
Originally Posted by sglynn
Your photos are not coming thru. Just shows a dash.
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Hopefully they will show now. Boy do I hate google photos 
__________________
Dan Langhout
2020 =VAF= Dues PAID . . . . .
RV-7 N528DP slow build
First Flight July 26th, 2014
665 hours and counting . . . .
Now based at Moontown (3M5)
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08-05-2016, 10:10 AM
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Join Date: Jul 2005
Location: Denver, CO
Posts: 295
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They were showing for me yesterday afternoon, but now they are just dashes again.
__________________
// corey crawford
// rv-7a (sold)
// denver, co @ KBJC
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