by Chappy » Fri May 28, 2004 9:56 pm
Shannon,
I found the original Ultraflight carb stacks from my Pioneers! They are two-piece: a straight tube welded to a flat baseplate. I have no idea why they have holes drilled through the tubes, unless it was to attach the throttle cable housing. Not elegant, but they worked.
One of my old Rotax velocity stacks, like the one in your picture above, still has the red making on it, and I suspect it was 6061-T6, as you have thought all along. I had never polished this one. You can see that a fair amount of heat was applied to it during forming, which you would expect if it was formed from 6061-T6.
Chappy
You do not have the required permissions to view the files attached to this post.