| From: | "Chrysanthos Kanellopoulos" <xchrysk-at-otenet.gr> |
| Subject: | a quick BT-7 [TANKS] |
| Date: | Sun, 21 Oct 2007 20:24:32 +0300 |
| Reply-To: | tanks-at-rctankcombat.com |
|
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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