The fuel system is rather simple.  There are the two strake tanks (out near the wings) which each feed into a center “sump” tank which in turn has a single line going to the engine.

Unlike most other aircraft which have valves that allow you to select which tank you are supplying the engine with, the Velocity only has a single shutoff valve between the sump tank and the engine. And it’s not controllable from the pilot’s seat.  So basically there is no “fuel management” in a Velocity other than to not run out (of fuel).

To accomplish that, I’ve got fuel gauges that will need to be calibrated. To do that, you add fuel, 5 gallons at a time to one of the fuel tanks while configuring the engine monitor until the tank is full. The problem is that when you add fuel to one tank it goes into the sump and then flows into the other tank. Now there is a method to accomplish this which involves disconnecting the strake-to-sump fuel line and attaching a flexible line to the strake with a shutoff valve.  Then you add the fuel in 5-gallon increments until full and calibrate the fuel gauge.

Then you drain that fuel into 5-gallon jugs and repeat on the other tank.

But I had an idea. Put shutoff valves between the strake and sump tanks. This will allow me you calibrate the fuel gauges and it would also let me isolate the main fuel tanks if I ever need to do maintenance.

Here’s the pilot side strake-to-sump fuel line.

And here’s the valve that I plumbed in.

Still not sure about the whole thing. It adds a bunch of connections (each one being a potential leak) and the only time that I’ll probably ever use it is when I calibrate the fuel gauges.