Hiya

I use a pumped webra so the tank is open to the air. So fuel cant drain out no matter what attitude, I routed the vent pipe from the front /top of the tank to behind and below the tank, out the bottom of fus behind the wing. Following the tuned pipe seemed a neat way. I fill the tank with a "quick filler" valve located in the top of cowl.

I was a bit narked to say the least when I found the engine wouldnt fit in the cowl. As I had the cowl vac formed from my own pattern I only had myself to blame. Making a new plug/cowl is a "longer term" plan but to be honest I think it worked out well as it was. Vortex Vacforms (Leicester, UK) has the pattern and should be able to supply identical cowls very cheaply. A standard stroke webra 61 "should" fit but the LS webra was a bit too tall.

My turtle deck is made from a lite ply base with a hole to clear the pipe. I used 1/4" square strips along the length, five 1/4" balsa formers and 1/64 ply skin glued to the 1/4", glass clothed for strength & pop bottle canopy. Vents are thin ally tube cut at an angle.

Cheers
Dave