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  #1  
Old 03-27-2020, 09:50 PM
Mark33's Avatar
Mark33 Mark33 is offline
 
Join Date: May 2010
Location: Baton Rouge, La.
Posts: 754
Default K factor

Hi gang,
Can someone give me the math equation for calculating the K factor?

Thanks
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RV-7- IO-360, EFII, Whirl Wind C/S, (Built and sold)
RV-4- O-320, Catto three blade, P-Mags (Sold)
RV-8- IO-360, Hartzell C/S (Flying)
RV-7- (Building)
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  #2  
Old 03-28-2020, 12:57 AM
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Mark33 Mark33 is offline
 
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Location: Baton Rouge, La.
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Default

Quote:
Originally Posted by SPX View Post
Thanks, but that?s not what I?m looking for. It?s just a simple equation to calculate fuel flow VS. fuel used. If I?m not mistaken, it?s (fuel used X old k factor divided by fuel added = new k factor). Hopefully someone will be ab to confirm if I have this equation/method correct or not.
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Mark H.
RV-7- IO-360, EFII, Whirl Wind C/S, (Built and sold)
RV-4- O-320, Catto three blade, P-Mags (Sold)
RV-8- IO-360, Hartzell C/S (Flying)
RV-7- (Building)
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  #3  
Old 03-28-2020, 02:13 AM
Peter Costick Peter Costick is offline
 
Join Date: Jan 2005
Location: Melbourne, Australia
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Default

(computed fuel used / actual fuel used) * your current K factor.

I used this to set mine up over several flights and now it's about 99% accurate.
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  #4  
Old 03-28-2020, 07:42 AM
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Mark33 Mark33 is offline
 
Join Date: May 2010
Location: Baton Rouge, La.
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Thanks a lot Peter! I plugged in some fictitious numbers and worked out an equation the way I thought it was suppose to be calculated and the way you said to do it, and the solution came out exactly the same.

Thanks again!!
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Mark H.
RV-7- IO-360, EFII, Whirl Wind C/S, (Built and sold)
RV-4- O-320, Catto three blade, P-Mags (Sold)
RV-8- IO-360, Hartzell C/S (Flying)
RV-7- (Building)
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  #5  
Old 03-28-2020, 10:17 AM
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GalinHdz GalinHdz is offline
 
Join Date: Mar 2010
Location: KSGJ / TJBQ
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Quote:
Originally Posted by Peter Costick View Post
(computed fuel used / actual fuel used) * your current K factor.

I used this to set mine up over several flights and now it's about 99% accurate.
FWIW I did mine this exact way back in 2013 with a very small "fine tuning" adjustment in 2017. Now when I fill up, the fuel remaining indication is within 1gal of actual.

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