Re: RE: transmission [TANKS]

[<adt22-at-drexel.edu>]

Thanks Greg and Steve.

If I understand one-way bearings and two-speed transmissions well enough from your 
descriptions and this this excellent site:
http://www.rctek.com/info_bearings_one_way.html
http://www.rctek.com/transmission/info_two_speed_tranny_design.html

then I think that means this single speed, non reversing tranmission is modifiable 
as Steve outlined.
http://surpluscenter.com/item.asp?UID=2007021423000275&item=1-2948&catname=

But at only 6.25:1 and plastic, I'm a little less interested.  

Thanks,
Amir



----- Original Message -----
From: Greg Chapman <blacknchap-at-hotmail.com>
Date: Monday, February 12, 2007 5:07 pm
Subject: Re: RE: transmission [TANKS]

> Considering the one way bearing will be used to drive the one 
> particular 
> direction each of the gears, it could not be internally modified 
> to be used 
> both directions, we use the same sort of transmissions/gearboxes 
> in R/C 
> cars/trucks and you would have to have an external device to be 
> able to 
> reverse the transimission, these 'reverse gears' are notorious for 
> failing 
> and we usually remove them because if it goes into reverse and the 
> transmission is going forwards, boom :-). Have seen a 6mm hardened 
> shaft in 
> a 1/10th scale (nowhere near the load of a tank) bent at 40 degrees.
> Check out the two speed transmissions in 1/8th scale gas cars - 
> say Serpent 
> or Mugen brand, one of these could be modified easier i reckon, 
> you guys are 
> quite inventive.
> 
> Regards Greg C
> 
> 
> >From: <adt22-at-drexel.edu>
> >Reply-To: tanks-at-rctankcombat.com
> >To: tanks-at-rctankcombat.com
> >Subject: Re: RE: transmission [TANKS]
> >Date: Mon, 12 Feb 2007 11:23:46 -0500
> >
> >Good call Steve.  John Burden from surpluscenter says "The 1-2950 
> has a 
> >one-way clutch."
> >
> >Does anyone have a sense of how difficult that is to work around?
> >
> >-Amir
> >
> >----- Original Message -----
> >From: Steve Tyng <SteveT44-at-comcast.net>
> >Date: Monday, February 5, 2007 8:58 am
> >Subject: RE: transmission [TANKS]
> >
> > > Amir wrote:
> > >
> > > > This would be so cool if it could go in reverse:
> > > > 
> http://surpluscenter.com/item.asp?UID=2007020423290165&item=1-2950
> > > >
> > > > what would make it non-reversing?
> > >
> > > Two reasons that I can think of.  It means it simply does not have
> > > a reverse
> > > gear or there's a one way clutch in it's design.  The one way
> > > clutch makes
> > > sense since the unit was designed for a self propelled mower.  
> This> > wouldallow pushing the mower without the engine running.  Call
> > > Surplus Center and
> > > ask them to clarify.
> > >
> > >
> > > Steve Tyng
> > >
> > >
> > >
> >
> 
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