Fuel Flow sensor issue

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Warmi
Posts: 7
Joined: Tue Jan 10, 2023 12:27 am

Fuel Flow sensor issue

Post by Warmi »

After installing everything I had my Red Cube sensor working as well and was planning to start calibration when it suddenly died on my last flight.

I had the black box recording going and it looks like it just died within about 20 seconds - went down all the way from 11 gallons ( which is btw wildly inaccurate for my Rotax 912 ULS but that's beside the point - as I mentioned I have not had chance to calibrate it yet)

I was doing touch and goes and on increasing power to 5300 RPM ( the go part ) it went up to 11 gallons and then went down to 0 within 20 seconds and never recovered ( the csv file is attached )


Here is the relevant part - fuel flow and RPM - you can see RPM being constant at 5300 or so while fuel flow dropping to 0.
Reading the troubleshooting guide for IES, to me it suggest a blocked fuel flow sensor rather than anything else but I am not sure - should I even bother checking electrical connections or does it sound like blockage problem ?

Code: Select all

7.6	5290
9.3	5250
11.1	5250
9.7	5240
7.4	5240
5.7	5250
4.3	5250
3.3	5250
2.5	5260
2	5260
1.5	5260
1.1	5280
0.9	5280
0.7	5280
0.5	5280
0.4	5290
0.3	5290
0.2	5300
0.2	5300
0.1	5310
0.1	5310
0.1	5320
0.1	5300
0	5300
0	5300
0	5300
0	5320
0	5320
0	5330
0	5340
0	5350
Attachments
FuelFlow.xlsx
(40.42 KiB) Downloaded 3083 times
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