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12-24-2018, 01:02 PM
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Join Date: Mar 2010
Location: KSGJ / TJBQ
Posts: 2,034
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I installed my "Red Cube" back in 2012, it now has more than 500 hours and is still running great. Sounds like there may be something in your particular installation.
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Galin
CP-ASEL-AMEL-IR
FCC Radiotelephone (PG) with Radar Endorsement
2020 Donation made
www.PuertoRicoFlyer.com
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12-24-2018, 01:26 PM
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Join Date: Sep 2013
Location: Rancho San Lorenzo
Posts: 883
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I installed an EI CGR30P on my Aviat Husky last year. Installed the red cube between the mechanical fuel pump and Berndix FI servo, per EI instructions (my Husky is fuel injected). The red cube itself is attached to the firewall. The inlet and outlets are both 90 degree elbows. EI said that was okay but I might have to do more K-factor tuning.
I flew about 80 hours and the flow never registered below 1200 rpm. EI had me send in the cube and said it was bad and replaced it under warranty. The warranty replacement (installed in October) worked great but just stopped working after 20 hours. I am sitting here looking at it on my workbench. I am going to call EI on Wednesday.
I have had great luck with Flow-Scan transducers on JPI monitors but this first foray into red cube-ville hasn't been pleasant. My red cubes have been FAA PMA TSO'd units since the Husky is type certified.
Jim
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RV-8
(a few more airplanes too)
Last edited by jliltd : 12-25-2018 at 01:02 PM.
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12-24-2018, 01:52 PM
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Join Date: Mar 2014
Location: Prescott, AZ
Posts: 734
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I've seen lots of complaints here about Red Cubes failing so I know it's not just mine. I know it's mounted right and the wiring is right and solid. It's out of the heat and the cable is away from plug wires.... The power and ground that runs the Red Cube comes from the RDAC, no other sensors are failing. The only thing left is to scope the pulses to isolate the cube from the RDAC. Always something............
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12-25-2018, 07:38 AM
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Join Date: Aug 2009
Location: Newport, RI
Posts: 705
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Install
Have you installed the unit in line after all fuel pumps according to the instructions? Mine is mounted on the fire wall between the carb intake and
Engine driven fuel pump. It also has straight fittings in and out. Works well.
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Al Girard, Newport, RI
N339AG
RV-9
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12-25-2018, 08:52 AM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,108
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Certified version
Just curious, what do the spam cans use for a fuel flow sensor?
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John S
WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.
Dues paid 2020, worth every penny
RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 5% in work
Firewall Forward 5% in work
www.pilotjohnsrv9.blogspot.com
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12-25-2018, 11:30 AM
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Join Date: Mar 2014
Location: Prescott, AZ
Posts: 734
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Quote:
Originally Posted by PilotjohnS
Just curious, what do the spam cans use for a fuel flow sensor?
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They mostly use Floscan sensors. Mounted between the servo and divider (FI). I've installed many in certified and they seem to work very well if installed properly. |
12-25-2018, 12:48 PM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,108
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Can i use one
Quote:
Originally Posted by FasGlas
They mostly use Floscan sensors. Mounted between the servo and divider (FI). I've installed many in certified and they seem to work very well if installed properly.
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Can I use one of these with a g3x? How would i wire it up?
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John S
WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.
Dues paid 2020, worth every penny
RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 5% in work
Firewall Forward 5% in work
www.pilotjohnsrv9.blogspot.com
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12-25-2018, 01:04 PM
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Join Date: Sep 2013
Location: Rancho San Lorenzo
Posts: 883
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Quote:
Originally Posted by PilotjohnS
Just curious, what do the spam cans use for a fuel flow sensor?
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JPI and others use Flowscans. EI uses red cubes. I think most experimental EMS use red cubes.
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RV-8
(a few more airplanes too)
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12-25-2018, 01:22 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,120
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Quote:
Originally Posted by Brantel
Almost 9 years on mine. Works fine. Might die tomorrow but for now it works.
The one time I did have an issue, turned out it was a poor crimp on the factory connector.
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Almost 3 years and 370 hours on mine, and the only issue I have had was due to my poor wiring crimp.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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12-25-2018, 02:07 PM
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Join Date: Nov 2006
Location: Oklahoma
Posts: 669
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Over 10yrs and 800ish hours mounted on the hot side of the firewall on a shelf and still going strong. Accurate to within .2 gallons most top offs. No issues at all. Hope I haven't jinxed myself
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Joe Schneider
RV-7, IO-360, BA Hartzell, N847CR
Flying since 2008
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