View Single Post
  #2   Report Post  
K Smith
 
Posts: n/a
Default Trailer Axel / Physics Puzzler

QLW wrote:
I've never built a trailer using torsion axels but I like the concept. I
wonder how to design a 2 axle system to achieve equalization? I'm thinking
a rotating sub-frame would be required. I have built several single axle
trailers with trailing arms and coil over springs that worked well but were
a lot of work to build.
IMHO, the balance point will be over the CL of the wheels.

"Gary Warner" wrote in message
...

So the axels that we have are torsion axels (no springs). They will just
attach
directly to the underside of our trailer. The thing is, it's not just a
straight
across axel. Well, the axel goes straight across, but coming from the
center of the axel is a 6" arm that goes back to the spindle. In other
words,
the tires are off-set 6" behind where the axel is.

For a picture go to this web sire (really an Adobe PDF document)
and see page 5 (the 2,300 lb to 3,500 lb Torflex axel).
http://www.redneck-trailer.com/pdf/A/810torflex.pdf


PUZZLER: Does the axel "balance" the weight over the
axel or over the wheels? .

Put another way: Say we had a rectangular frame 20 feel long and
it was perfectly balanced at the 10 point. (No boat or anything on
it yet.) So a straight across axel put at the 10' point, it'd basically
balance. But with our axels, where the wheels are off-set 6"....do
we put the AXEL at that 10' point or do we have the
WHEELS at that 10' point.

Our current thinking is that it's the wheels. It's pretty hard to test
because of the weights involved and we have to weld the axels on
(not bolt 'em) so we'ld like to get it right the first time.

Gary





Yes you are correct, the wheels are the pivot point, not the rubberised
section & cross beam (it's sorta like the spring hanger, if you had
them:-)) It wouldn't matter if the torsion fittings attached just behind
the coupling or just ahead of the extreme rear, the trailer & it's load
still pivot around the wheels.

K