Fuel Flow Sensor on Rotax 912s

[mr bill]

Do you mean between the gascolator and the engine?

[Sacha]

Do you mean between the gascolator and the engine?

I mean between the fuel tank and the gascolator

[Sacha]

I mean between the fuel tank and the gascolator

So basically I guess I'm asking: is it ok to have the fuel return line feed into the gascolator instead of e.g. back into the fuel tank?

[kitfox2009]

Hi Sacha
I have my return line plumbed to the third fitting on the gascolator. But I do not have a fuel flow meter. I believe if you install the sender in the line anywhere before the gascolator you will have to "adjust" somehow for the fuel volume that continually circulates.
Cheers
Don

[jrevens]

Hi Sacha
I have my return line plumbed to the third fitting on the gascolator. But I do not have a fuel flow meter. I believe if you install the sender in the line anywhere before the gascolator you will have to "adjust" somehow for the fuel volume that continually circulates.
Cheers
Don

It seems to me that the fuel that "continually circulates" with the system plumbed as Sacha described, will all be downstream of the sender. The sender will only be measuring the total fuel flow consumed by the engine - not that which is going around & around downstream of the sender. It should work fine. If the return line was emptying upstream of the sender it would be a different matter.

[Sacha]

Thanks everybody for your input. The point of this solution for me was to make sure that the fuel sensor is only measuring actual fuel consumed but being a novice at aircraft building, I wanted do double check there were no known problems with using the third fitting on the gascolator in this way.