Author Topic: Kavan Babe Bee tank extender (Read 906 times)

Bill Heher · « **on:** November 26, 2010, 09:17:43 AM »

I have a couple of these plastic ring extenders that increase a Std Babe Bee tank into an 8cc tank. They always seem to leak, even when I use gasket sealer ( Perma-tex Red)).

Anybody know something that will seal the small groove between the extender and the tank body? The rear cover seems to seal better= stiffer / more area to seal.

Larry Renger · « **Reply #1 on:** November 26, 2010, 06:38:39 PM »

I would take a bit of Ajax or similar cleanser and lap the extender to the tank with some oil. Just press in in firmly and rotate it around for a while. Then clean it thoroughly with soap and water. That should seat it in nicely.

Wayne Collier · « **Reply #2 on:** November 27, 2010, 09:18:25 AM »

I've never used one of the Kavan tank extenders so I really can't offer much advice on that; however, I have been using Permatex blue RTV sealant in lieu of gaskets when assembling Cox engines. I try to use enough without over doing it. I usually let it sit for a couple of weeks before adding fuel. I know that takes some patience, but I have one that hasn't been taken apart for over two years and is still performing well with no leaks.

Jim Thomerson · « **Reply #3 on:** November 27, 2010, 09:57:49 AM »

The bolt heads supplied with the extender did not seal on the tank backplate, and had major leaks.

Larry Renger · « **Reply #4 on:** November 28, 2010, 01:49:35 PM »

I haven't noticed any leaks, but just to be sure, just rubbed silicone seal into the bolt head recesses. See my Tech Terror thread for where I am using the extender. I need every drop of fuel I can get to get through the full AMA competition pattern. I also re-tightened the bolts a couple of days after initial assembly, and did find some new slack to take up! I guess the plastic "settles in" for a while.

bob dickerson · « **Reply #5 on:** December 05, 2010, 07:03:03 PM »

first post

I always thought the screws supplied with the
Kavan extender were the weakest link.
Not crazy about the choice of metal used, and the
heads are kind of scrawny.
I ordered 2-56 allen cap screws from McMaster Carr
and had excellent results. I forget how much I paid, but
I remember they were a little pricey. They have them in lots if 12.
These were 1-1/2"ss for the
8cc stunt tank. The heads do flush with thre backplate
nicely and don't leak.
Hope this helps,
Bob

kenneth cook · « **Reply #6 on:** December 06, 2010, 03:04:22 AM »

Recently, I was going through some items my dad had in one of his infamous boxes. I came across a Kavan tank extension. This one though is all aluminum. The extender is as well. My first question is, are these a reliable aftermarket product? I just haven't had a chance to try it. I do have a plane that would benefit from the nose sticking out a little more though. Ken

Paul Smith · « **Reply #7 on:** December 06, 2010, 08:19:56 AM »

I had one and sold it without ever trying to use it.

There are so many Golden Bee and Black Widow tanks around, why bother? Also, the idea of drilling a big hole in the Babe Bee tank and hooking up an external tank works OK.

Author Topic: Kavan Babe Bee tank extender (Read 906 times)

Bill Heher

Kavan Babe Bee tank extender

Larry Renger

Re: Kavan Babe Bee tank extender

Wayne Collier

Re: Kavan Babe Bee tank extender

Jim Thomerson

Re: Kavan Babe Bee tank extender

Larry Renger

Re: Kavan Babe Bee tank extender

bob dickerson

Re: Kavan Babe Bee tank extender

kenneth cook

Re: Kavan Babe Bee tank extender

Paul Smith

Re: Kavan Babe Bee tank extender