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  #21  
Old 06-11-2018, 06:38 AM
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Auburntsts Auburntsts is offline
 
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Location: Dumfries, VA
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Quote:
Originally Posted by MConner View Post
Sounds like it would be exposed to a lot of heat, might just live with the high reading for the brief time I run the boost pump.
So to piggyback on what Vic said, mine has worked without issue for 231 hrs—time will tell. Mine is covered in a large firesleeve and I suspect that between that and the fuel flowing through it that the temps are tolerable. The accuracy is phenomenal—about a tenth of a gallon based upon fuel flow tests and real world comparison of data at fill ups.
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  #22  
Old 06-11-2018, 07:13 AM
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Freightdawg Freightdawg is offline
 
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Vic or Todd (or anyone who'd like to jump in),

Can you be more specific about the heat shield on the flow sensor? A picture sure would help.

Thanks.

Jeff
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RV-10 Kind of all over the place in the plans. Need to get out to the airport.
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  #23  
Old 06-11-2018, 07:24 AM
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Auburntsts Auburntsts is offline
 
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Sorry, no pics handy, but mine is just a large length of silicone firesleeve about 10-12” in length and has a big enough diameter to slip over the cube. Got it from Aircraft Spruce
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  #24  
Old 06-11-2018, 08:00 AM
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Lynnb Lynnb is offline
 
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Location: Cedar Hill, TX
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You can buy a piece of sleeve from ACS if you search for:
FUEL TRANSDUCER COVER FIRESLEEVE BLACK

Or
http://www.aircraftspruce.com/catalo...ickkey=1785576



Quote:
Originally Posted by Freightdawg View Post
Vic or Todd (or anyone who'd like to jump in),

Can you be more specific about the heat shield on the flow sensor? A picture sure would help.

Thanks.

Jeff
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  #25  
Old 06-11-2018, 08:13 AM
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Bob Martin Bob Martin is offline
 
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Location: Richmond, Virginia
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Default Heat and transducer

After my first FWF red cube failed, I relocated it to a cooler spot and wrapped it with self adheasive aluminized material I purchased at the auto parts store in the exhaust wrap area. Just cut and applied it overlapping pieces until it was covered completely.
I like the reflective qualities over the fire sleeving material plus it is adhesive backed and thinner.
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RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
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  #26  
Old 06-12-2018, 09:35 AM
Strasnuts Strasnuts is offline
 
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Location: Salt Lake City, Utah
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Default Another example

The instructions also state to mount it somewhere other than the engine. The engine vibration causes quicker fatigue on the internal parts. I got about 850 hours on mine until it quit working. Mine has had the firesleeve on it from the start.
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  #27  
Old 06-12-2018, 09:51 AM
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FasGlas FasGlas is offline
 
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Location: Prescott, AZ
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I've been using Red Cube's with the MGL iEFIS system. I have 3 installed, 2 inside the cockpit and 1 behind the baffling (firewall side). I have never had a problem with the 2 inside but constantly have a problem with the one under the cowl. I've replaced the Red Cube 3 times and replaced the RDAC twice. Runs intermittent during fights. Sometimes worse than other times. I've done everything but add a heat shield around it since it's not on the hot side of the baffle, between the servo and spider... BUT... I think I'm going to give the heat shield a try, see if that makes a difference. I monitor the temps at the firewall, they run around 140F, doesn't seem that hot for a Red Cube...
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  #28  
Old 06-12-2018, 02:36 PM
BobTurner BobTurner is online now
 
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Quote:
Originally Posted by FasGlas View Post
I monitor the temps at the firewall, they run around 140F, doesn't seem that hot for a Red Cube...
Have you looked at the temperature, say, 10 minutes after shutdown? With only convective airflow, and no fuel flow, I wonder if the temperature peaks some time after shutdown?
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  #29  
Old 06-12-2018, 05:17 PM
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FasGlas FasGlas is offline
 
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Quote:
Originally Posted by BobTurner View Post
Have you looked at the temperature, say, 10 minutes after shutdown? With only convective airflow, and no fuel flow, I wonder if the temperature peaks some time after shutdown?
Yes, when the heat propagates the whole area it will get over 160F on the firewall side. I haven't monitored the cylinder side but I'll guess it's closer to 250F + after shutdown. BTW, this is in my Lancair, not my Staggerwing.
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  #30  
Old 06-16-2018, 08:07 AM
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JackinMichigan JackinMichigan is offline
 
Join Date: Nov 2012
Location: Canton, MI
Posts: 210
Default It quit working again

I started this conversation when my fuel flow sensor quit. Fixed it (about reply #6) by flowing a lot of fuel thru it. But now it has quit working again. The trouble shooting begins anew. Will post whatever findings.
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