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this is a chain base i was playing with these are the specs:
16f/s and 5.3f/s
center wheel direct drive
4by1 tubing
AM kit wheels
tensioning by pulling out end wheels (holes no shown)
My inspiration behind this base was come up with one that could be easily manufactured so thats why Im using kit wheels. It weighs in at 44lbs without chain and I know i can make it lighter if I go with smaller tubing but that depends on the game right now its at 1/2in ground clearance.
feed back much apprecatied.
Discussion
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16-08-2008 20:03
RMS11
Re: pic: 6w/d Chain base
looks sweet! The only thing I might suggest is a support bar i the middle. You dont want for somebody to hit you from the direct side and the whole chassis compresses inward. You could move both supports in a bit to fix it also without adding weight. 
16-08-2008 20:45
R.C.
Re: pic: 6w/d Chain base
The only thing is the weight. 44 lbs is a lot, even with gearboxes. The lighter the better:
faster
more weight for other things
16-08-2008 22:28
R.C.
Re: pic: 6w/d Chain base
Also if you have access to a CNC or Waterjet, that would lose a lot of weight.
16-08-2008 23:02
Akash Rastogi
Re: pic: 6w/d Chain base
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Originally Posted by rc_cola1323
Also if you have access to a CNC or Waterjet, that would lose a lot of weight.
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You could also do the same cheese holes with the cross braces.
Nice design though.
16-08-2008 23:06
R.C.
Re: pic: 6w/d Chain base
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Originally Posted by lilstogi11
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19-08-2008 09:53
JesseK
Re: pic: 6w/d Chain base
You could go with 3x1 tubing and angle aluminum for mounts to the transmissions. One angle aluminum piece on top of the 3x1 and one on the bottom, which should cover the 5" face of the transmission for mounting. The angle aluminum could be attached to the 3x1 via welding or via riveting.
Weight savings should be roughly 4.5 lbs assuming a 36"x27" base. Since that's 4.5 lbs of pure aluminum, it'd wind up being less expensive as well.
19-08-2008 16:41
sdcantrell56
Re: pic: 6w/d Chain base
Why not look into using plate and standoffs to save even more weight. You only lose a little bit of strength but it is easier to work on the drivetrain and much lighter. For an idea of what Im talking about take a look at this frame that we are working on :
http://www.chiefdelphi.com/media/photos/31759
19-08-2008 22:54
M. Mellott
Re: pic: 6w/d Chain base
With your choice of using inner and outer frame rails to support your wheels, plus your use of standoffs (or what appear to be standoffs) between the frame members to protect the wheels in case of a side hit, you could use 4" x1" U-channel in place of the box tubing--that would save a lot of weight. Adding cross members (at least 1, probably 2), as suggested by RMS11, would be a good addition...and you could get away with using 1/16" wall on the cross members.
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