Aux Fuel tank

Dangerous... I don't know. Dan Cullman will . Email him ?
Grant Jordan may know also.

the Cruismaster fuselage is about 4 inches wider.

Can you compare part numbers... perhaps from the manuals for the two airplanes ?
that way.. even if the seller hasn't got a part number.. you would be able to compare.

just an idea. Larry
 
I believe that the -3 tank might fit, but it is 20 gallons which would be pretty hard on the weight and balance. The 14-19/14-19-2 aux tank will fit, and according to a 337 that I saw, was approved as a S.K. (factory service kit) You have to put the 14-19 tank in from the side (cut fabric) where the Slim Kidwell under seat aux tank can be installed from the inside with only trim removal. The 14-19 tank goes behind the rear seat. At one time, I removed a 14-19-3 tank from an airframe, and it came out through the cabin, not out through the side of the plane. It must have been narrower than the -2 tank. I think that I have all three of those tanks, so I will try to measure the width today. Grant.
 
You might also want to verify bladder size! Might just be a sign of age, but after a three hour and 43 minute flight the other day, I was done! I think my days of 6+ hours in the cockpit are now going to be few and far between!! CruisAirs are not ergonomically correct for pee bottles and I'm in no rush to get back into diapers :(
 
I remembered (getting harder every day) to take my tape measure today. The 14-19-3/early Viking aux tank is 35 inches wide, but as I said, it is 20 gallons, so not a good idea for a Cruisair. The 14-19, behind the rear seat tank is 38 inches wide, and requires installation(I believe) from the side. It is 14 gallon. The Slim Kidwell under seat 14 gallon tank can be installed without cutting the fabric on the fuselage, and since it is a little further forward, has less effect on the W&B. I think the club has the drawings for the under seat tank. The reason I previously said that I think the 14-19 tank has been approved in a 14-13, is that in my research, I ran across a 337 that showed a factory service kit number (S.K. 18) for a behind the seat aux tank. It showed the drawing numbers, but that information burned up in the Valley Fire. The 337 was from a plane that was long ago dropped from the FAA records. There is actually a little more room behind the seat of a 14-13 than a 14-19, so making solid brackets would be the only problem (other than the feds). I actually own the best aux tank setup, but I dont think it could ever be approved. I have the wings and wing aux tanks that Floyd Snow (aeronautical engineer) did in the the late 60s. They are about 15 extra gallons per wing, and would have very little effect on your W&B. The wing skin is reinforced to make up for a couple of removed ribs. He did mostly STCs for airliners, but did many modifications to his Cruisair. If I could magically turn my Cruisair into an experimental, I would think about putting those wings on, but that is just dreaming. Enough for now. ____Grant.
 
the cruismasters have thicker wing skins.. I wouldn't want to put that extra weight in my wings and lose ribs !

I'm kinda with Larry.. more than another hour for safety's sake , more than my body will do.

Grant makes sense on the w&b issue, and the under seat tank.. but it could make annual inspections a lot harder.

no law says you have to FILL an aux tank. Is it possible to use a dip stick on the behind seat tank ?
any tank is dangerous if you don't KNOW what's in it.. imho.
 
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