RE: First bench test of MK2 TTS [TANKS]

["paul needham" <paul.2.needham-at-btconnect.com>]

Grant

Either 12mm or 1/2 inch not sure ?

Paul

-----Original Message-----
From: tanks-admin-at-rctankcombat.com [mailto:tanks-admin-at-rctankcombat.com]
On Behalf Of Grant Mahalek
Sent: 01 August 2005 16:53
To: tanks-at-rctankcombat.com
Subject: Re: First bench test of MK2 TTS [TANKS]


Hey Paul,

I'am going to be using 1/2" hardened steel shaft for my drive and idler 
axles....what are you using?.....a while back Steve Tyng recommended
5/8" if 
memory serves.....

I found solid rubber wheels at the local Princess Auto store in Calgary,
AB. 
I'am hoping these will work well....4 3/8" dia., 3 1/4" wide, with 3/16"

grooves running the full width of the wheel, Delrin bearing, which I
popped 
out and replaced with two flanged bearings for the idler wheels. I
inserted 
two olite bushings into the Delrin for the drive wheels(to drop dia. to 
1/2").

There are a few things about these rubber wheels that I think makes them

unique. Namely, the evenly spaced 3/16" grooves(perpendicular to the
track 
rotation) that run around the circumference of the wheel, the texture of
the 
wheel and the ease of machining/sawing/cutting the wheel.  I cut a 5/8"
wide 
by 5/8" deep groove down the middle of the wheels to capture the
centering 
key of each inside track on the TTS using my table-saw....what a hooot
that 
was. Considering these factors this should be a "kick ass" drive 
system.....I hope LOL.....  The 3/16" perendicular grooves on the
surface of 
the drive wheels should act loosely  to "key" the wooden inner tracks in

place and thus limit track slippage to a large degree.

The texture of the drive wheels, the 3/16" grooves, ease of machining,
low 
cost($8CAN ea.) and availability seem ideal.  Time will tell....things 
usually don't go this smoothly!

For those interested..... me thinks these wheels are used as rollers for

boat trailers.


----- Original Message ----- 
From: "paul needham" <paul.2.needham-at-btconnect.com>
To: <tanks-at-rctankcombat.com>
Sent: Monday, August 01, 2005 6:38 AM
Subject: RE: First bench test of MK2 TTS [TANKS]


> Bart
>
> Ideas yes ... You aint experienced TTS until you have tried to get it 
> to drive.
>
> My Hetzer was tensioned up as much as I dare and it could drive on 
> concrete and turn ok. Got onto mowed grass [ short ] would go in a 
> straight line but not turn ..answer more tension!.
> Got onto short grass [ 1 - 2 ]inches would go in a straight line but
not
> turn ..answer more tension!!.
> Got onto long grass would go in a straight line but not turn ..answer
no
> not more tension <grin> insufficient power in the KCMS so now needs
more
> power.
>
> I had in the end got enough tension to bend the sides if the top is 
> not on and the whole thing creaks like a sailing ship.
>
> Paul ' add the tension ' Needham
>
> -----Original Message-----
> From: tanks-admin-at-rctankcombat.com 
> [mailto:tanks-admin-at-rctankcombat.com]
> On Behalf Of Bart Salmons
> Sent: 01 August 2005 03:33
> To: tanks-at-rctankcombat.com
> Subject: Re: First bench test of MK2 TTS [TANKS]
>
>
> So does weight of the chasis seem to affect an ability to skid turn 
> guys? Does the vehicle's weight on the roadwheels help to keep the TTS

> tracks from
> slipping off?  In about 4 inch high grass my Shermanchasis wantto
> twistthe
> tracks off.   any ideers?
>
> Bart Salmons (BSC)
> Slammer 6
>
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