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Hello

I have instaled in my rotax 914 fuel flow FT-60 and recently it was configurated in my Dynon Skyview with 76000 of "Fuel Flow Calibration".

In my last flight with 1:46 min was consumed 38 lts, but on my screen it was only 25 lts spent.

I think I should change this full flow calibration but I don't know which factor I should put.

 

Can someone help me?

 

PS: See photos attached. My airplane (WT9) full tank is 126 lts

9953_1_WhatsApp Image 2023-07-17 at 21.15.38.jpeg (You do not have access to download this file.)
9953_1_WhatsApp Image 2023-07-17 at 21.14.52.jpeg (You do not have access to download this file.)
  • Re: Fuel Flow in rotax 914

    by » 11 months ago


    Hi Marcelo,

    This should be described in you Dynon installation manual, Note the standard setting for a red cube FT-60 is 68,000 pulses per gallon, noting you are using litres.

    The photo looks like you have two FT-60s so is one in your return fuel line? 

    To recalculate the K factor (pulses per gallon or litre) you use this simple formula:

    Corrected K factor = ({Current reported consumption} X {Previous K factor}) / Actual fuel used

    So in your case:

    50,000 = ({25} x {76000} / 38 

    I would try and get some more readings on actual consumption vs. amount reported by FT-60/Dynon before changing as 38 Litres of fuel is not really going to get it correct first go. Note the FT-60 has some specific mounting requirements and does not like vibration much so if that is an issue tuning the K factor will only get you so far, your image also show the wiring coning out the side and it’s recommended it points up.


  • Re: Fuel Flow in rotax 914

    by » 11 months ago


    Hi Byron, thank you for your instructions. 

    I will recalculate, problaby change the wire, and after it come back here .

     

    You help me a lot, thanks again,

     

     

    Marcelo

     

     


  • Re: Fuel Flow in rotax 914

    by » 11 months ago


    Ft-60 install instructions also call for 4-6" of straight tubing INTO and OUT of the red cube. Your 90 degree fitting right at the cube is not good for accuracy.


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