---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Sat 10/29/05: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:42 AM - Re: fuel access plate sealing (Merems) 2. 10:02 PM - Re: Aux Fuel Question (GMC) ________________________________ Message 1 _____________________________________ Time: 08:42:12 AM PST US From: "Merems" Subject: Re: RV7-List: fuel access plate sealing Don, A while back I spoke with Vans about the cork gasket and Proseal. There explanation was that the gap created by the cork will allow a tool to be wedged in the joint when prying the panel off the tank (if needed). If you coat the mating surfaces of the cork, the perimeter of the joint, and under the screw heads with Proseal then you should be OK. Proseal is a very good flexible adhesive. Once two parts are properly cleaned and sealed with Proseal, it is very difficult to separate them. I recently did a repair on both fuel tanks on an RV-4 (not mine). We had to remove the access plates which only had Proseal on them. They were extremely difficult to remove. The cork would have made a difficult job much easier. Paul ----- Original Message ----- From: Don Hall To: rv7-list@matronics.com Sent: Friday, October 28, 2005 9:32 PM Subject: RV7-List: fuel access plate sealing I'm about to the point of not being able to avoid pro-seal any longer. I have a question. The directions do not say that it is mandatory to seal around the cork gasket on the access plate, but that some builders choose to. I'm thinking of choosing NOT to. I figure I can always change my mind later, like at least waiting till after fully testing the tank... Once the plane is built and flying, is opening the access plate ever done for anything but repair? IOW, not ever for inspection? How many years might a cork gasket be expected to last? I know automobiles use flimsy cork gaskets for all sorts of tanks and they work well for a long time assuming the bolts are all evenly tightened. Also, the directions for sealing the screws on the access plate just say to put some sealant on the threads. What's the point of getting the platenut all gunked with proseal? Seems the only think you're trying to seal at that point is the circumference of the screw hole. I'm assuming you could just glob some proseal around the last few threads, near the screw head? I wouldn't see the point of putting seal on the threads that actually go into the platenut. Thoughts? ****************************************** Don Hall N517DG (registered) rv7 wings http:\\donka.net\rv7project.html ****************************************** ________________________________ Message 2 _____________________________________ Time: 10:02:31 PM PST US From: GMC Subject: Re: RV7-List: Aux Fuel Question <018d01c5dc9f$b7fb55e0$6400a8c0@fastburner> --> RV7-List message posted by: GMC A friend has installed nice tip tanks in a RV-7A he is building, however he is having second thoughts about the planned gravity fuel transfer method to the main tanks and wonders if he needs to install a transfer pump. He would like feedback from anyone who has auxiliary wingtip tanks using a gravity transfer (3/8 lines) to the mains. He is running the fuel from tip tanks to cockpit valve then back to main tanks. Thanks George in Langley BC