Ventless Wing Fuel System Diagram
2273H has an extensively modified fuel system. Both wing tanks are non vented. The only venting is on the header tank via the gage. The system works like a champ. Unlike 09H which was forever siphoning fuel out the cap in flight, this works perfectly. The return to the left tank is made where the original fuel gage was mounted. The fuel gage was replaced with a wing mounted float type gage.
Paul M. Anton