Hi,

I'm learning to fly with a Duraplane trainer that has the gutterpipe fuselage. After several too short flights of 5 minutes with the 5 oz. tank (OS LA40), I found a 12 oz. tank at the LHS that would actually just fit inside the fuse. It's roughly 2 x 2 x 7" lg. I rebuilt the plane to accept the long tank, assembled it per instructions, but worried about the clunk position being far aft.

Subsequent flights have proven my fears to be true. After a long training flight (believe me I need the airtime!) my base leg causes the motor to abruptly quit every time. If I moved the clunk to the middle of the tank, would this be the best I can do without going to a bladder?

Has anyone made their own bladder? I don't suspect I can buy one for this application, can I? I see the racers use latex bladders in 5-6 oz. tanks, but I don't want to go back to a small tank. Would you use latex or mold a convolute out of silicone?

I'm wondering why this isn't a more common problem with all the different tanks and fuselages out there. Any recommendations welcome!

Dan