ORIGINAL: mola
Hi Pattratt,
I'm building a Valiant as well right now, and I have attached a few photos of the installation FYI.
Notes about the plumbing: I was originally planning on using the CH 45° fuel fittings and have a clamp on the fuel line outside of the plane, however I drilled the holes to far down on the fuselage causing the fuel line to get kinked against the engine. Therefore I went back to an old school design instead with a fuel filter outside without the 45° fittings. If you place the 45° fuel fittings higher on the fuse side they should work as well giving an even cleaner/more pro look...
Great pictures, but I keep wondering what the theory is to why people still run check valves on the vent line. There is absolutely no reason for this. If you take the check valve out of the line, your engine will NOT flood while just sitting. If the check valve is in the vent line and the air temps go up, it builds pressure which forces fuel into the engine, thus causing it to flood. After well over 3000 flights on DZ engines, I have NEVER run a check valve and have never had an issue with fuel leaking out the vent line. Guys flying the big gassers don't use check valves on their vent lines either. I've even talked to Richard Verano about this and he agreed, there is no reason to do this. If you take the check valve out of the vent line the use of something to "pinch" the fuel lines on the outside is no longer necessary.
Arch