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Actually, Paul, you've made me want to
build a BT-7 just for the heck of it. If I could just start with
12 mm steel shafts bent to right angle Z for suspensions at an
ironsmith's with a torch. I hope that works and they won't break
at the corners after they are overheated. (I never trusted suspension
arms built out of 2-3 parts and heavy loads, but that's just me, I
overengineer everything to be on the safe side because I know so
little). It has a rear drive system too! I am drawing a
1:8, 70 cm long BT-5 on CAD during breaks at work. 18 V DeWalt
drills (500 RPM) fit into the 1:8 hull and anvilus' M01 motors fit
inside the 1:6 hull, and positioned so they are directly connected
to the rear drive shaft (388 RPM). It should be easy for me if I
transferred Tankette's DeWalt drills drive and axle systems into the 1:8
Christie. No transmissions and pulleys for me....
It is supposed to have two Z -active
suspension arms with springs for teh two front ground wheels (finally)
and a bell crank system like the Locust and my Ha-Go for the rear,
closely spaced, ground wheels, and be done with this problem in my usual
quick, crude, and primitive style.... I think I've mirrored the first Z
suspension arms. Ahhh! but a Christie is not to be taken lightly and
crudely! She is as mystical as a Luger in teh sense that she always looked like a prototype (with her casket
shaped hull ) yet with sophisticated systems. This coffin looking thing
hops gracefully over obstacles.
That's only a recipe for building an
all aluminium and stainless steel model quickly.
Perhaps in a year or two from
now...
Chrys
PS . In the last attachments, Christie /
T-34 type tracks with tiny 3 mm screws. MOst of teh conical head
goes into the holes. Large, 5 - 6mm thick bolts in the middle are
the guide horns. Only these are 65 mm wide tracks. In scale
1:6 a BT-7 would require hinges that are 5 cms wide and with
two holes. You'd have to drill the middle hole for the guide horns
yourself. IT is possible if you started with 3 mm cobalt drill
bits, then with 5 or 6 mms. 5 horns make a drive wheel 9 cms diam. and 6
of them about 107 mms diam.
. IN the other type , little angles
come exactly to the middle of the hinge. Two of them from either side,
and both bolted together with tiny screws, to form the guide horn. Think
Meccano.
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