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07-01-2015, 01:58 AM
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Join Date: May 2015
Location: San Rafael
Posts: 32
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Hot Footwell tunnel?
It's warm in California this week.. 100!
I have notice that when flying this week and last that the tunnel between the pilot and passenger is getting HOT!. Now I kinda rest my right leg against it when flying and I have noticed (wearing shorts) that the tunnel is really really warm.
What is housed in this are the can generate heat?
The oil cooler is on the front of the engine and the muffler is at the bottom of the engine but not between the two occupants..
Any idea on what is heating this are so much? Could it just be the radiant heat from the muffle and exhaust?
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07-01-2015, 05:20 AM
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Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,237
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Quote:
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Any idea on what is heating this are so much? Could it just be the radiant heat from the muffle and exhaust?
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Yes!  Cover it with some carpet.
__________________
John
RV12 N1212K
Flying Since June 2010
1020 Hours as of 9/30/2017
Johnrv12@icloud.com
RV14 Wing, arrived and building at Rdog's new Hanger at 16X
S/N 140014
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07-01-2015, 05:32 AM
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Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,587
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Rik, more info would help. Was this airplane built by you or another builder, or is it an SLSA? Does it have the interior kit option or not? Possibilities that immediately come to mind are a poorly sealed firewall, or a heater flapper door misadjusted.
__________________
John Peck, CFII, A&P, EAA Tech Counselor, Flight Advisor.
?Master Pilot? Award, UFO Member.
RV-12 N37JP 120176 Flying since 2012.
One Week Wonder Build Team, OSH 2018.
VAF paid through 10/2019.
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07-01-2015, 08:59 AM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 924
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I believe Rik is renting an RV-12 SLSA? If you are referring to the central tunnel located between the pilot's and passenger's legs, there is nothing in there that specifically generates heat. The RV-12 ELSA and I suspect the RV-12 SLSA as well do not use any firewall insulation. As a result, the heat you are sensing likely is radiated from the engine compartment (engine, exhaust, radiators, etc.). As noted by others, the carpeting/sidewall kit available for the ELSA and EAB versions of the RV-12 (I'm unsure what interior components are in the SLSA) helps to insulate the heated surfaces in the cabin.
__________________
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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07-01-2015, 06:40 PM
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Join Date: May 2015
Location: San Rafael
Posts: 32
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Quote:
Originally Posted by DHeal
I believe Rik is renting an RV-12 SLSA? If you are referring to the central tunnel located between the pilot's and passenger's legs, there is nothing in there that specifically generates heat. The RV-12 ELSA and I suspect the RV-12 SLSA as well do not use any firewall insulation. As a result, the heat you are sensing likely is radiated from the engine compartment (engine, exhaust, radiators, etc.). As noted by others, the carpeting/sidewall kit available for the ELSA and EAB versions of the RV-12 (I'm unsure what interior components are in the SLSA) helps to insulate the heated surfaces in the cabin.
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Exactly. Renting an SLSA from a flight school.. My right leg gets HOT to the point whereby it really gets your attention. Carpet would help insulate this.
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07-01-2015, 08:13 PM
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Join Date: Apr 2008
Location: Davenport, IA
Posts: 1,390
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Not unusual. The tunnel metal does get warm. Is noticeable during the summer.
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07-01-2015, 09:00 PM
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Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,237
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Quote:
Originally Posted by MartySantic
Not unusual. The tunnel metal does get warm. Is noticeable during the summer.
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Especially when flying in a sea of 100F air. Do you by any chance remember
what your oil temp was during your flight? 
__________________
John
RV12 N1212K
Flying Since June 2010
1020 Hours as of 9/30/2017
Johnrv12@icloud.com
RV14 Wing, arrived and building at Rdog's new Hanger at 16X
S/N 140014
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07-02-2015, 11:52 AM
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Join Date: Oct 2012
Posts: 421
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Quote:
Originally Posted by Jetguy
Especially when flying in a sea of 100F air. Do you by any chance remember
what your oil temp was during your flight? 
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Mine is very hot. Resealed it. Installed a small .25 amp PC exhaust fan on the bottom, helped a bit.
But it is one active heat sink.
Let's just say I rarely (if ever) have used the cabin heat.
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