[CRUSH-build] weight

[Bill Bennett]

Hi Mike
Always glad to hear weight saving ideas. I could go either way on this, I'm happy to defer to your judgement. The wood has the advantages you cite below. The points for the acrylic are:
it's ordered
it looks more consistent with robot construction practices than wood does
But either way is fine for me. 

Every little bit helps but then again, this is only 1.5 pounds saving. I'm surprised at the 9+ pounds though, but I think you're right.

One worry that's nagging me a little is the length of the wire run from the battery to the electronics board. This is two pieces of #6 wire running from back to front and up. It will be heavy (couple of pounds I guess) and also lose some power. Neither of these will be bad enough to be show stoppers I think, but if there was an idea to shorten that run length we should do it. 

Bill
  ----- Original Message ----- 
  From: Lint104 at aol.com 
  To: build at crush1011.org 
  Sent: Wednesday, January 25, 2006 12:59 AM
  Subject: [CRUSH-build] weight


  To all Mentors,

  I've been doing some calculating and find that using two sheets of 1/8" Acrylic w/ stiffeners
  would weigh 9.1245 pounds.

  If we use 1/4" mahogany plywood for the electronics board and clear 1/8" acrylic for the front protector the weight would be 7.6975 pounds.

  1/4"plywood would be stronger then 1/8"acrylic.

  The plywood would have a better ability to give with shock and not break or crack as easily as the acrylic, for the electronics.

  The 1/4" plywood would have it's own ability to absorb shock and vibration instead of the electronics.

  This switch would save us 1.427pounds and give the electronics board a built in shock absorbency.

  What are your thoughts on this possibility?

                                                                                 Mike L.




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