red cube fuel flow calibration on rotax 912

[Jonas]

I've got a Pipistrel Virus, and burn fuel at an average rate of 18L/hour
the Skyview shows 21L/hour consumption.
I have both feed line from the tank and a tank return line"red cube" sensor installed.

My pulses/gallon is set at 68000
is there a magic number to reduce the reading by exactly 3L, or do I just guess and adjust the fuel inlet sensor pulse/gallon down to 85% of the original number to 58285. and leave the return sensor alone.

I know 3 Litres / hour isn't much of a discrepancy normally, but...

 

[skysailor]

Mathmatically (if you are confident in the 18 L/hr measurement) you should just be able to use the ratio to adjust the K factor. 21/18=68000/x. This should give a new K factor of 58286. You could give that a try since you can always adjust later if needed but it should work.