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07-10-2017, 03:43 PM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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still...
I'd rather have the totalizer...that's the beauty of experimental, do what you want and be happy...
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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07-10-2017, 05:24 PM
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Join Date: Nov 2005
Location: KRTS
Posts: 1,798
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Quote:
Originally Posted by airguy
The totalizer also can give you estimated fuel left at destination when tied into your GPS (assuming it's calibrated correctly) which greatly assists in making the decision about a fuel stop or push on.
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So do these, I recommend the lower one

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Next?, TBD
IAR-823, SOLD
RV-8, SOLD
RV-7, SOLD
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07-10-2017, 08:00 PM
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Join Date: Dec 2006
Location: Collinsville, IL
Posts: 620
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Quote:
Originally Posted by tspear
No. GPS is a fundamental change in how you navigate in a radio based environment. (pilotage is not the correct comparison, VOR and NDB are).
In this case a fuelntotalizer and a fuel tank gauge are providing the same service. How much fuel is remaining. Fuel totalizers largely came about because of inaccurate fual gauges. Fuel gauges have historically been inaccurate because of FAA lighting and other requirements constrained possible solutions. We do not face such constraints. So why continue with the bandaids?
Tim
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Not really, totalizers don't know how much is left - only how much you've used. For example, if you have a fuel leak or lose a gas cap and have fuel siphoning out of the tank, you could have much less fuel than you would think by only looking at the totalizer. I want (and have) both, gauges and flow, thank-you very much.
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Don
VAF #1100, EAA864
-6A bought flying
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07-10-2017, 09:01 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,145
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Quote:
Originally Posted by flytoboat
Not really, totalizers don't know how much is left - only how much you've used. For example, if you have a fuel leak or lose a gas cap and have fuel siphoning out of the tank, you could have much less fuel than you would think by only looking at the totalizer. I want (and have) both, gauges and flow, thank-you very much.
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I haven't seen anyone argue against the belt-and-suspenders approach, but I'm a little surprised at the arguments against using new tools to solve old problems. Anyone here still using rotary-dial telephones?
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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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07-10-2017, 09:03 PM
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Join Date: Oct 2014
Location: Milwaukee, WI
Posts: 300
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Quote:
Originally Posted by rocketman1988
Any chance you could use an arduino to do digital to analog conversion?
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this was my first thought.
you could even smooth the data in arduino.
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Matt
CFI / RV-10
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07-11-2017, 10:40 AM
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Join Date: Dec 2007
Location: Peachtree City, GA
Posts: 144
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I've been looking for existing hardware to solve this problem. Why reinvent the wheel?
But as it doesn't seem to exist yet, I'll look into the Arduino. Thanks.
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Scott Flandermeyer
Rv-10 TDI 300 hrs
Fayettevile, GA
2020 VAF Donation complete
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07-12-2017, 09:29 AM
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Join Date: Mar 2010
Location: Scappoose
Posts: 119
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Heavier wheel inside the red cube
Have you considered having a heavier wheel made for inside the red cube? Or have a heavier wheel with fewer 'teeth' and larger pulse width made? You would have to recalibrate the EFIS for the smaller pulse count, but that should not be too difficult. Or even remove half of the teeth on the existing wheel in order to help keep it from reversing to the previous tooth.
If the wheel inside the red cube is easily removable, I would volunteer to make a new one for you out of maybe brass or steel or even stainless. I can't imagine it would take too terribly long to do.
Maybe you have already tried this route, but I figured I could suggest it.
Richard from Langaire
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07-12-2017, 10:30 AM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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Research
After a brief research session online, it would appear that the marine industry has potential solutions to your FF issues...I read quite a few data/feature sheets that discussed the pulse issue and momentary reversed flow...Most of the info was on the Maretron site...
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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07-12-2017, 11:33 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Quote:
Originally Posted by Richard@Langair
Have you considered having a heavier wheel made for inside the red cube? Or have a heavier wheel with fewer 'teeth' and larger pulse width made? You would have to recalibrate the EFIS for the smaller pulse count, but that should not be too difficult. Or even remove half of the teeth on the existing wheel in order to help keep it from reversing to the previous tooth.
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I had the same idea. Unfortunately, the Cube is designed to make disassembly impossible without breaking a potted wire (seen here at 5 o'clock):
It passes through the cover, then back through it again to the sensor shown in a previous post.

__________________
Dan Horton
RV-8 SS
Barrett IO-390
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07-12-2017, 12:23 PM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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I must confess; I'm baffled by the fascination with the color red.
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