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12-21-2013, 03:46 PM
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Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 992
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CHT wire protection ?
How many ways have you protected the thermocouple wire and extensions between the bayonet fitting/spring strain relief and the firewall. Silicone coated glass sleeve looks like an option but it only comes in 100' rolls ! Any suggestions are appreciated...Larry
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Larry DeCamp
RV-3B flying w/7:1 0320 / carb / Pmags / Catto 3b / digital steam
RV-4 fastback w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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12-21-2013, 07:44 PM
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Join Date: Jan 2011
Location: Eatonton, GA
Posts: 215
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Ditto
I am at the same point. My bonanza has what looks like fiberglass fire sleeve. I have been looking for a source or other ideas as well.
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Jeff Green
2016 RV-8 #82985
1968 E33C Aerobatic Bonanza
Pleased to donate Dec 2019
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12-21-2013, 07:47 PM
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Join Date: Nov 2010
Location: Okanagan Valley BC, Canada
Posts: 482
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I installed a couple of adel clamps on each side using the case bolts, then carefully clocked the EGT probes to avoid other "stuff". On #3 I used a couple of wraps of silicone tape (sticks to itself) to tie the wire to an intake tube that I just couldn't avoid. I also safety wired the gear clamps, just because of the temperature cycling.
I did not use any other coatings...
You can just make out the probes in these pictures if you look carefully...
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Ron Townson
Okanagan Valley BC, Canada
RV-8 Completed Dec 2013
Membership renewed Sept 8, 2019
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12-21-2013, 09:02 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,789
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roundit seems to be holding up for me
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
Last edited by Steve Melton : 12-21-2013 at 09:06 PM.
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12-21-2013, 09:26 PM
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Join Date: Jan 2010
Location: Ottawa, Ks
Posts: 2,188
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My probes came with a fiberglass sleeve.
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RV 7 400 hours and counting
19 donation done
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12-21-2013, 11:02 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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12-22-2013, 05:54 AM
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Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 992
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THANKS GUYS !
Great leads, problem solved, GO VAF....Larry
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Larry DeCamp
RV-3B flying w/7:1 0320 / carb / Pmags / Catto 3b / digital steam
RV-4 fastback w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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12-22-2013, 07:39 AM
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Join Date: Oct 2008
Location: Hales Corners, WI
Posts: 981
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Didn't know that needed protection. What's the down side?
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Jesse Bentley
N229Z - RV-8 - Flying - Livin' the dream!
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12-22-2013, 07:50 AM
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Join Date: Jan 2005
Location: Clarion, Pennsylvania
Posts: 549
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Routing
Related question, for those who routed EGT probes along with sparkplug wires for a short distance along the cylinders, do you have any problems with unstable readings?
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-Andy Turner
RV-10 N784JC
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12-22-2013, 08:15 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,668
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Quote:
Originally Posted by Veetail88
Didn't know that needed protection. What's the down side?
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Generally speaking EGT/CHT wires already use high temp materials due to the environment they work in, the only protection they really need is chafe protection. The wires carry no current so the result of a wire fault will simply be an erroneous reading.
If you route them so they are not to close to an exhaust pipe they will be fine. If using a hight temp fire sleeve makes you feel better then by all means do it, but it may be a bit of overkill.
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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