sthill & N70R have it right;

H9 ARFs, like any manufacturer, need some items replaced. And Hayes tanks are simply the best. Unfortunately, 16 ounce is as big as they come.

I replaced the tank in my H9 73" CAP 232 with a 16 ounce DuBro (the largest that would fit without surgery to the tank compartment), but that ain't enough gas for a Saito 150. So I fitted a Hayes four-ouncer alongside as a "header" or "saddle" tank.

We do this all the time with helicopters, but this is the first time I've tried it on a plank. It works great, and is handy to have in the old trick bag when you have a capacity or plumbing problem. I understand that the jet guys routinely use multiple-tank systems too.

But I'm with Craig; if at all possible, I'll use a Hayes tank over all others. DuBro is my second choice. Sullivans are a bit flimsy for my tastes.

Steve