Take a look at these photos:
Steering3small.JPG
Steering1small.JPG
Steering2small.JPG
The whole mechanism is driven by www.servocity.com servo gearbox, but would
work with a servo converted gearmotor, too. The white circular piece is a 1 ˝”
PVC end cap that is attached to the servo drive shaft (via a big gear). The
black thing is a chunk of ˝” UHMW plastic with a hole just big enough to
fit the PVC cap through. Steering arms connect to the black ring and push the
front wheels left and right. Those turnbuckles let each wheel be adjusted individually.
They are standard 3/16” Home Depot turnbuckles. I picked up a left-handed
#10-32 die from MSC (http://www1.mscdirect.com/cgi/nnsrhm)
and threaded some 3/16” steel rod so I could make the arms the correct lengths.
The servo drives the center cap, and the motion is transferred
to the black ring through the springs. The springs and ring help to isolate the
servo from road bumps. They give some play and let the wheels turn a bit
without jarring the servo. That’s the theory, anyway.
-
Doug
From:
tanks-admin-at-rctankcombat.com [mailto:tanks-admin-at-rctankcombat.com] On Behalf
Of Stacy Hilton
Sent: Saturday, September 01, 2007 1:47 PM
To: tanks-at-rctankcombat.com
Subject: Re: My LAST steering rebuild [TANKS]
I'm not too sure about all-wheel steering, but there was a prototype called
a BT-7IS that had three driven sets of road wheels as opposed to two. I
thought this might be fun to replicate and would solve a potential traction
problem. Do you have an example of a Conn Steering Linkage?
----- Original Message -----
From: "Frank Pittelli" <frank-at-rctankcombat.com>
To: <tanks-at-rctankcombat.com>
Sent: Saturday, September 01, 2007 11:05 AM
Subject: Re: My LAST steering rebuild [TANKS]
> Clark Ward Jr wrote:
>> This is an interesting question because the BT-7 is only wheeled when
>> it's not tracked :) In effect, you lose a track (or both) due to
>> damage/whatever, and the powered roadwheels keep you moving.
>
> Ok. I've looked at the wiki info on the BT-7 and I think it's a
> straight-forward issue. If the vehicle is operating with both tracks,
> then it is considered a tank (albeit a light-weight). If the operator
> removes one or both tracks at any time, then the vehicle becomes an
> armored car (even more of a lightweight). Personally, I'd love to see
> that vehicle with pivot steering on all roadwheels ... using a modified
> version of the Conn Steering Linkage :-)
>
> With regard to dual designations, that issue actually came up a few years
> back when Mike Blattau converted the UN Support Vehicle (SV004) by adding
> a gun to the top (in an effort to stop competition from other supply
> vehicles he said). Therefore, during the battle, the vehicle was given
> the ratings of an armed car, but still ran using the designation of SV004.
> Similar situations have occurred when tanks with non-operational guns are
> used as supply vehicles. Basically, we use whatever accounting method
> keeps things simple for the score keeper :-)
>
> Frank P.
>
%f0%e8%f1%f3%ed%ee%ea%201%20044.jpg
