FT-60 Fuel Flow Transducer on 912ULS

If I remember right the cube is supposed to be mounted in a horizontal position and the hoses before and after for at least 6". Plus it is supposed to have a filter prior to the cube.

Thank you, Ran.

Yes. Roger is right. I have The Cube mounted horizontally with a fuel filter upstream.

I have the cube mounted horizontally in hard tubing (under the seat) with 6" straight tubing before and after, but no fuel filter upstream other than the wing tank strainers. Has been operating flawlessly now for 8 years, 1100 hours. I'm not saying that an upstream filter is not a good idea, but it is certainly not mandatory. In my opinion, anything that can get thru the wing tank strainers is not large enough to jam up the turbine wheel in the cube.

Just a couple of cents worth of input here.  Typically if there is a return line of any sort (and IMHO there should always be one to eliminate vapor), you would install two Red Cube's, one in the supply line going to the carbs/fuel injectors, and another on the return going back to wherever it goes.  Your monitoring system then subtracts the return flow from the supply flow to get actual usage.

I like the thoughts about isolating the Red Cube's from vibration, that makes a ton of sense.

Interesting idea of placing just one Red Cube on the line going to a single carb and doubling the flow output as it is monitored.  It does eliminate the need for a second Red Cube to monitor a return line as it is after the return flow has already been mechanically subtracted, but it also assumes both carbs are using the same amount of fuel.  Maybe not a bad assumption though, if the carbs are sync'd well.  The only issue then might be vibration isolation and the desire to limit the amount of fuel line between the manifold and the carb.