You'll notice if you look closely at the frame extenders that they have
small holes for the axles of the bottom two wheels. These holes are
just large enough to accomodate the axle. When I drilled the plates I
was using a handheld drill and the bit wandered slightly while starting
the hole. Also, the top hole was punched out with a press at the place
I bought the steel. Their tolerances were so loose that it took them
many (maybe 15)attempts before the results were anywhere near
acceptable. Lucky for me they only charged me for the ones that were
usable.
Anyway, when you figure that there are two holes on each side of the
frame plus the two large holes for the top wheel and the 4 holes for the
bottom two wheels, the loose tolerances add up. To get the whole thing
to even bolt together required leaving the bolts loose until it was all
assembled then gradually tightening everything up. Once tightened there
was a twist to the frame.
One thing that this got me thinking about though was --
What if you intentionally rotated the wheels 45 degrees around the
y-axis. The bottom wheel would be 90 degrees offset from the top so
that when you pedalled forward you'd move to the left and backwards
pedalling would move you to the right. I've never seen anything like
this before so perhaps this is your chance to be the first!
-mg
--
mgrant - Ever hoping for the best!
The sun is the same in a relative way but you're older, shorter of
breath, and one day closer to death.
michael_j_grant (at) yahoo (dot) com
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