I am building an RV-7A and plan to install the fuel flow transducer on the forward floor skin between the fuel selector and the electric fuel pump. That's the only place there can be a six inch run upstream and downstream of the transducer that I can see. Is this what other RV builders have done? Also, the installation instructions say to install a filter upstream of the transducer. I am not keen to add another fuel filter. I am thinking that the finger screens in the fuel tank are adequate filtration. Comments? Thanks, Steve.
Flow Scan transducer installation
- Thread starter Steve
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frank(Guest)
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Those finger strainers are pretty coarse...Personally I would not rely on them...Not so much for the flow sensor but more for the fuel system itself.
If you have an electric boost pump (fuel injected?) i see other builders have the transducer on the discharge side of the boost pump...boost pump is close to the fuel selector.
Personally I don't like a single filter in front of the boost pump either...if it plugged (highly unlikely I know) your engine will quit.
I have two fuel filters one prior to each input of the fuel selector...Then again my electric pumps are in the wing roots too and I don't have an engine pump...
Choices choices...
Frank
If you have an electric boost pump (fuel injected?) i see other builders have the transducer on the discharge side of the boost pump...boost pump is close to the fuel selector.
Personally I don't like a single filter in front of the boost pump either...if it plugged (highly unlikely I know) your engine will quit.
I have two fuel filters one prior to each input of the fuel selector...Then again my electric pumps are in the wing roots too and I don't have an engine pump...
Choices choices...
Frank
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- Mar 23, 2005
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Re: Flow Scan transducer installation
Steve,
While getting 6" of straight run into the transducer is optimal, the EMS allows a custom K factor to be used. Many customers have had success with much shorter straight runs and then calibrating the unit by putting a known quantity of fuel through it and adjusting for the offset. Our EMS manual tells you how to do this. You can usually get within 0.1G accuracy over 50G after adjustment.
I wouldn't worry too much about the 6" suggestion if it makes installation a real problem.
Steve,
While getting 6" of straight run into the transducer is optimal, the EMS allows a custom K factor to be used. Many customers have had success with much shorter straight runs and then calibrating the unit by putting a known quantity of fuel through it and adjusting for the offset. Our EMS manual tells you how to do this. You can usually get within 0.1G accuracy over 50G after adjustment.
I wouldn't worry too much about the 6" suggestion if it makes installation a real problem.