Fuel calibration - Tail Dragger

[SuperCub]

Is there a way to do the fuel calibration on a taildragger like the RV-7 so that I can see the correct quantity on the ground? I suppose the calibration process should be done in a level attitude otherwise.

 

[vlittle]

My suggestion would be to jumper your two fuel level inputs over to two enhanced inputs. Define the enhanced inputs as fuel level (capacitive type). Calibrate your main floats in level flight position and the enhanced inputs on the ground.

Should work, but I haven't tested it.

Vern

 

[bkthomps]

My suggestion would be to jumper your two fuel level inputs over to two enhanced inputs.  Define the enhanced inputs as fuel level (capacitive type).  Calibrate your main floats in level flight position and the enhanced inputs on the ground.

Should work, but I haven't tested it.

Vern

if this works i want to know, i would hope dynon would have a method for doing this too

 

[skysailor]

Check the install manual. I helped install a dual Skyview system in an RV4 and had no difficulties. If memory serves, Dynon says that as long as the ADAHRS correctly displays aircraft attitude the fuel gauges may be calibrated in the tail down attitude. I had no problem with it and it works just fine.

 

[rfazio1951]

I want to understand this! vlittle is saying to jumper the fuel level wiring from the resistive terminals to the capacitive terminals and calibrate in each position. Does this mean I should set up four fuel levels instead of the two I now have? And that the extra two will show the tail down position fuel level, and the original two will show the tail level position fuel level? This would be cool if it works.

 

[dynonsupport]

So actually, you're thinking of the mag cal, which works in any ground attitude, just as long as the attitude display is correct when you calibrate.

As for fuel quantity, it's literally taking voltage/resistance readings at each float or capacitance level that's demonstrated. If you do the cal with the tail down, you'll get slightly different readings in level attitude (depending on the aircraft's design), and vice versa. Basically, if the fuel level moves as far as the senders can see, so does the fuel quantity reading.

 

[skysailor]

That was the magnetic calibration versus the fuel calibration I was doing. Sorry for the confusion. Should have looked at my notes more closely.