Re: [TANKS] New Track Idea

[Joshua Updyke]

Okay guys here are some pictures of Revision 4 of my design. I 3d printed 
some horns to add to my previous revision 3. The pictures show both inside 
and outside horns. This is to show both ideas. But I don't imagine anyone 
would want both horns at the same time. I am pretty happy with the outside 
horn design. This would be another custom part, but the design is really 
simple and a one part mold. So I could cast these at home in a silicon mold 
pretty easily. The inner horn option still needs some work. Right now it is 
glued on and my original idea was for it to attach with a screw through the 
middle of the tread. But After testing that out it will not be as easy as I 
thought. I think I need to add some interlocking geometry in the center of 
the tread to help with this. Also I think the center horns are way too 
wide. But I am curious about your thoughts.


My questions are these:
Can anyone provide details about the horn geometry? Both in real tanks and 
in the 1/6 scale versions. The angle along the length of the track is 
related to the tightest bend of the track. But I am unsure of the other 
angle along the width of the track. This would be the angle that the bogie 
wheel would try to climb when turning. 

How strong do the horns need to be? If they were made from a hard plastic 
like ABS would that work? Legos are ABS if you need a good idea of the 
strength of ABS.


 

 


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[TANKS] Re: Drive Cog Patterns

[srwh74rn]

Hi Steve

I must be blind but where do i find the file to download you design?

Thanks
Stewart

On Thursday, December 11, 2008 at 6:05:15 PM UTC-5, TyngTech wrote:
>
> I've uploaded the design of my Cromwell's drive sprocket.  Check out 
> TTS Sprocket.pdf in the files section. 
>
> Steve Tyng 
>
>
> On Dec 9, 11:14 pm, "Chrysanthos Kanellopoulos"  
> wrote: 
> > Glad to hear.  It was ony a few minute break at work here. 
> > Chrys 
> > 
> > 
> > 
> > - Original Message - 
> > From: "Joker"  
> > To: "R/C Tank Combat" > 
> > Sent: Tuesday, December 09, 2008 11:17 PM 
> > Subject: [TANKS] Re: Drive Cog Patterns 
> > 
> > > Thanks. This was great.  I took the photo, scalled it, inverted the 
> > > colors, and i'm using it as the template.  Thanks again. 
> > 
> > > On Dec 8, 4:41 am, "Chrysanthos Kanellopoulos"  
> > > wrote: 
> > > > The diameter of the inner circle (green) could be 0.0873, with the 
> clear 
> > > > distance between the teeth 0.0350 = 1 3/8". That way, the pads fit 
> > between 
> > > > the teeth. 
> > > > The width of the tooth ~ 0.064 or 0.0638 m. or 1/4" wide. 
> > > > The diameter of the outer circle, on the edge of the teeth would 
> then be 
> > > > 0.0993 m. = 3,901 " 
> > > > I hope that helps and it is not more confusing! 
> > 
> > > > Chrys 
> > 
> > > > JOkers sprocket7.3.jpg 
> > > > 123KViewDownload 
> > 
> > > > JOkers sprocket7.4.jpg 
> > > > 66KViewDownload 
> > 
> > > __ NOD32 3434 (20080911) Information __ 
> > 
> > > This message was checked by NOD32 antivirus system. 
> > >http://www.eset.com 
> > 
> >

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