On Thu, 08 Sep 2011 21:08:43 -0500, Snag wrote:

I have a utility trailer , 5X8 with an expanded metal deck . This
trailer tilts , as it was designed as primarily an ATV hauler , and the
axle is centered under the box . This causes problems with low tongue
weight and stability at highway speeds when I load the Harley up in it .
I want to move the axle back enough to stabilize it at highway speeds
with the weight more or less centered in the box . I don't care if I
lose the tilt feature , I'm not using it anyway . I prefer 2X lumber
ramps .
My question is , how far do I move the axle ? Do I want a 60/40 split
on
distance ? 55/45 ? ISTR that the ideal tongue weight is 10% of total
weight , which would indicate 55/45 .
But I'm not sure , and this isn't something I can easily try different
configurations . I'd like to be ready to roll by monday am , the wife
and I have been talking about splitting to the land (Ozarks , wooded ,
no TV, no telephone) for a few daze .

For those who care - the welds will be made with the tombstone and
6013
rod . The trailer frame is mild steel angle iron , I see no need for
7018 . Test coupons of the closest material I have on hand will be
welded and cut/tested before I weld the actual trailer . Hmm , I might
be able to add alternate spring mounts and leave the originals in place
. I'd be able to restore the original config if needed that way .

You want 60/40, or 55/45 by weight, not length.

I know it'd be a bitch, but I don't know how much -- have you tried just
putting the Harley on backwards and going for a drive? If nothing else,
it'll give you an idea of the weight distribution.

I'd go find a feed store or other operation with a scale, and weigh the
front and back of the bike. This would tell me the weight distribution
of the bike (which should be at least somewhat heavier in back, and lots
more if it has a good amount of rake to it). Then I'd figure out just
where the axle needed to be to get the weights right.

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com