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Useable Fuel verification on the RV-10

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Tim(at)MyRV10.com
Guest

Posted: Mon Feb 20, 2006 5:22 pm Post subject: Useable Fuel verification on the RV-10

I have always heard that the useable fuel in the RV-10 was basically

ALL of it.



A couple days ago I had the opportunity to do a controlled test

of this.



After initially calibrating my fuel float sensors using FORWARD

sensing on the GRT EIS 6000 with my Chelton, and finding that they

really needed to be done with REVERSE sensing, I needed to drain

my tanks to get an empty and full reading from the EIS.



So I flew at 4000' AGL above the airport for what I figured

was the last few gallons of my left tank, until it ran out.

It was very interesting as my Chelton started barking at

me to "check engine" before the engine started to run rough,

because it noticed the fuel pressure dropping below limits.

I switched the valve over and everything was well.  I landed,

drained the sumps into a gas can and only got out maybe 1/2

to 1qt at most.   I filled the tank and calibrated it.   I

then did the same flight on the right tank with the same results,

and filled that one and calibrated that one as well.



So yes, all fuel is basically useable fuel in the RV-10.



In addition, today I checked my calibration and found that the

reading on my instruments for remaining gallons was dead-nuts-on

when I topped off the tanks.



It's VERY nice to know exactly how much fuel you have.  Amazing

that with float sensors I can actually say I have readings I

can trust.



Tim

-- 

Tim Olson - RV-10 N104CD - Flying

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jesse(at)itecusa.org
Guest

Posted: Mon Feb 20, 2006 5:49 pm Post subject: Useable Fuel verification on the RV-10

Do your tanks fit 30 gallons from empty?  We put 32 gallons in per side

based on the pump we were using.  Anybody else see this?



Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

Fax: 815-377-3694

 

I am in Ecuador until May, 2006.  If you have questions regarding I-TEC,

please call the office at 352-465-4545.  If you would like to talk to me,

please call me at 352-505-1899.  This number won't always be on, but it has

voicemail that will get to me in Ecuador.



--

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Tim(at)MyRV10.com
Guest

Posted: Mon Feb 20, 2006 6:09 pm Post subject: Useable Fuel verification on the RV-10

Mine top of at almost exactly 30 gallons each side too.



Also, regarding calibration, I find the floats stop changing

value at right around 24 gallons during a fillup.  So, I set

my fuel reading to max out at 24.  I can verify fuel on

the Chelton at 60 total, and use the totalizer, and the

float levels read 24/24 for the first part of the flight.

Then once they start coming down from there, they're accurate

all the way to zero.  That's the recommended calibration

practice by GRT.  That's funny you get 32 gallons when

you fill up.  I can't imagine the tanks would vary that much

in construction.  Do you trust the fuel pump you're using?

Maybe someone is gouging you. ??



Tim Olson - RV-10 N104CD - Flying

Jesse Saint wrote:

[quote] 

 

 Do your tanks fit 30 gallons from empty?  We put 32 gallons in per side

 based on the pump we were using.  Anybody else see this?

 

 Jesse Saint

 I-TEC, Inc.

 jesse(at)itecusa.org

 www.itecusa.org

 Fax: 815-377-3694

  

 I am in Ecuador until May, 2006.  If you have questions regarding I-TEC,

 please call the office at 352-465-4545.  If you would like to talk to me,

 please call me at 352-505-1899.  This number won't always be on, but it has

 voicemail that will get to me in Ecuador.

 

 --

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LIKE2LOOP(at)aol.com
Guest

Posted: Mon Feb 20, 2006 7:29 pm Post subject: Useable Fuel verification on the RV-10

In a message dated 2/20/06 9:11:50 P.M. Eastern Standard Time,  Tim(at)MyRV10.com writes:

  	  Quote: 	
		  That's    funny you get 32 gallons when

you fill up.  I can't imagine the tanks    would vary that much

in construction.  Do you trust the fuel pump    you're using?

Maybe someone is gouging you. ??

	


 

      Fill a KNOWN 5 gallon gas can at several gas  stations, and then at the airport fuel pump and see if you get the same  results. Best to do this when your car needs gas!!!    Alternately, you can fill the 5 gallon gas can with water from 1 gallon  milk jugs and note the level when 5 have been added.   Don't use  a 1 gallon can for the test, the larger 5 gallon volume will give  more reliable data.   Calibrate the pump first, then your tanks, or  calculate the error and ask for a refund for all the gas they charged you for,  and never delivered.... if that is the case.

  

 DO NOT ARCHIVE   

 Stephen Blank  RV-10 Builder #40499 / C-170B flyer

766 SE River Lane

Port St. Lucie, FL  34983



772-475-5556 cell

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