Subject:
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replacement construction for 'obsolete' narrow steering rack
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 13 Dec 1999 23:10:07 GMT
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Viewed:
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888 times
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It appears that the 1x6 plate with round ends with holes,
as used to hold sterring gear together since the early
80s, is no longer made - at least the fee current sets
that use standard (new) steering gear don't include it.
(See
"plate with toothing, 6x1" on
http://w3.one.net/~hughesj/technica/registry/r_plate.html
)
The new plate/rack combination exists in an 8-wide
variety, as used in the MT dragster, but there is none
for the narrowest possible setup using the current sterring
knuckles, which is 6 studs wide.
While not an exact replacement to recreate old sets
from instructions, the following works for new constructions:
Take a 4-axle, place a worm gear in the center, cap
ends with #1 (i.e. single-ended) angle connectors.
If used with a 1/2-bush spacer over the steering knuckle,
an 8-gear will mesh easily from either above or below.
The rotational position of the worm gear will affect
whether the gear 'looses' this short rack at the end;
even in the 'best' position, two gears or a slight
restriction of steering travel may still be necessary.
The position of the gear along the axle makes a difference,
too; if the gear is placed below the worm (and thus against
the beams that hold the sterring knuckle 'arms'), that
positioning is more limited and makes proper functioning
more difficult. Despite a slight need to 'tune' this setup,
it basically solves the problem of the missing plate, which
I was facing in building a 10-wide car, using the small
'race' tires (bungee dragster rear wheels etc.) for the
first time.
Other solutions coming to mind right now:
2 6-long halfbeams with 1/2-pegs, and a normal 1x4 rack
(too tall)
1 6-long halfbeam, a 2x4 plate with a normal 1x4 rack
pointing either up or down - this may be the best, actually.
Back to the lab...
-gbr
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