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  #1  
Old 09-27-2021, 01:58 PM
jneves's Avatar
jneves jneves is offline
 
Join Date: Aug 2021
Location: Livermore, CA
Posts: 40
Default Cabin heat intake on Sam James Cowl

Edit a 3rd search with the right terms got my answer.

First mod on the new to me RV-6A is going to be cabin heat, he muff, cabin box/diverter, etc.. is all straight forward. My issue is where to draw intake air from. I currently have zero issues with temps and didnt want to go through trial and error if someone has already done this and knew the answer.

Where, in the plenum should I/are you, pulling fresh air from? Called SJ, but the new owners have not ran across this yet so they are not sure how to address it.

Again I can go through trial and error, but wanted to check to see what other's have done.
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N455DM - RV-6A - Bought Flying - 2021
Tip Up Canopy
IO-360-A2B
FP Hartzell 2 Blade (Refurbing a Catta 3 blade Carbon)
IFR - 2 Garmin G5s - 430W - GFC500
N89WD - Flight Design CTSW - Sold 2021

Last edited by jneves : 09-27-2021 at 02:03 PM.
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  #2  
Old 09-27-2021, 02:53 PM
danny danny is offline
 
Join Date: Jul 2005
Location: puyallup, wa
Posts: 144
Default on the baffle behind #3 cyl

Hi, I have a James cowl and plenum. I get air from the rear baffle behind #3 cylinder. Easy to plumb down to the heat muff mounted on the right side exhaust. I haven't given it a hard test yet since it's been pretty nice weather up here in the NW but that seems to be changing fast.
Hope this at least gives you an option.
danny
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  #3  
Old 09-27-2021, 03:02 PM
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D Weisgerber D Weisgerber is offline
 
Join Date: Sep 2019
Location: Ionia Michigan
Posts: 288
Default

I took air from behind the #3 cylinder also with no problems. I ran it that way for about 20 years in all kinds of weather. I am in Michigan but it does get hot and humid here. I just finished my RV8 with a James cowl and plenum, I am using air from behind the #3 cylinder for that too, no problems so far, Its been about 2 months and 60 hours.
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RV8 N848DW. Ser#83830 done.
James Cowl
DAR inspection on 7-23-2021
First flight on 7-25-2021
Phase 2 on 9-3-2021
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  #4  
Old 09-27-2021, 03:27 PM
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jneves jneves is offline
 
Join Date: Aug 2021
Location: Livermore, CA
Posts: 40
Default

Thank you both very much. Seems to be the consensus across the board. Appreciate the confirmation. Now off to prep for the cooler weather.
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Johnny

N455DM - RV-6A - Bought Flying - 2021
Tip Up Canopy
IO-360-A2B
FP Hartzell 2 Blade (Refurbing a Catta 3 blade Carbon)
IFR - 2 Garmin G5s - 430W - GFC500
N89WD - Flight Design CTSW - Sold 2021
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  #5  
Old 09-27-2021, 04:50 PM
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dpansier dpansier is offline
 
Join Date: Jan 2006
Location: Green Bay, WI (GRB)
Posts: 532
Default

I source the cabin heater air in front of #1 with a 1.5Ē dia tube.
Two muffs in series, flown down to 0 F OAT with adequate cabin temps.
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Green Bay, WI (GRB)
RV-7 N450DP
W9LYX

Antennas for Experimental Aircraft
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  #6  
Old 09-27-2021, 05:00 PM
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jneves jneves is offline
 
Join Date: Aug 2021
Location: Livermore, CA
Posts: 40
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This last response lead me to another question, how many muffs does one need. Iím in California and donít expect to be flying much below 40*F. And even then donít fly much at those temps.
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Johnny

N455DM - RV-6A - Bought Flying - 2021
Tip Up Canopy
IO-360-A2B
FP Hartzell 2 Blade (Refurbing a Catta 3 blade Carbon)
IFR - 2 Garmin G5s - 430W - GFC500
N89WD - Flight Design CTSW - Sold 2021
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  #7  
Old 09-27-2021, 06:01 PM
pa38112 pa38112 is offline
 
Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 1,001
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New Jersey: Pick up behind #3 and two muffs in series with stainless steel wool stuffed in them. It's OK, but my wife would like more hot air.
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  #8  
Old 09-28-2021, 03:17 PM
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jneves jneves is offline
 
Join Date: Aug 2021
Location: Livermore, CA
Posts: 40
Default

Thank you all very much, going to start with one muff and intake behind the #3 like others. Also will use the restricted intake size to lower flow but increase heat transfer. Lots of great ideas from you all.
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Johnny

N455DM - RV-6A - Bought Flying - 2021
Tip Up Canopy
IO-360-A2B
FP Hartzell 2 Blade (Refurbing a Catta 3 blade Carbon)
IFR - 2 Garmin G5s - 430W - GFC500
N89WD - Flight Design CTSW - Sold 2021
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