That's what I was thinking.  I am going to put a smaller tank outside.

   What you might want and/or need is a true chicken hopper set up, where you have a large inboard tank that feed a smaller tank mounted outboard. The best examples of that I ever saw was on carrier models. Most of the bigger profiles had heavy ball bearing engines, so to get them to balance and hang on the lines correctly, you want a short nose moment. Bill Calkins designed the profile Guardian that Brodak put out and there may be info on those plans. The late Jim Thomerson had a great explanation with diagrams and such on Stuka Stunt that would be very helpful but that isn't around any longer. There are some tanks out there in production that have a small tank attached to the edge of a larger tank, but those are actually just a baffle type tank. While they make work well, they are not really a chicken hopper. I have had problems with those from having the pick up so far outboard, where the engine wants to lean out after it gets airborne and some centrifugal force starts to work against the fuel flow. You can also just fabricate a custom uniflow tank yourself by making a wood block form and dummy to the dimensions you need, then form the sheet tin stock around it and put the tubes where you think you need them. It's part of the hobby and a good skill to learn.
   Type at you later,
    Dan McEntee

On my primary force,  I run an inboard tank and an OS 25. I peak it out, as peaked as it can be or even a click more, and that's how I launch. Been that way and consistent since I built it.

I have a Shark 402 with an LA 25.  The Hayes 4 oz. tank is mounted on the inside of the fuselage.  It starts and runs totally wound out.  However, after it takes off and goes for about half a circle, it slows down and runs slow as if rich. 

Any ideas?

   That's what happens for a non-uniflow tank mounted inboard. It takes off, and the fuel delivery pressure goes up, making it go rich. Note also that this adds some stability to the mixture control, in that the faster it goes, the richer it gets, so there is a (weak) speed control aspect to it.

     Brett

Larry

An inquiring mind here. I've got a Saito 30 BN and plans for the Flite Streak. Sounds like a neat and atypical  configuration. Glad to hear it performs well.

Questions: Would a standard, rectangular clunk tank mounted flat against the fuse work for this? Muffler pressure?

Thanks.

Dave Mo