Moderator: Nicole Marie
No apology needed.Originally posted by Shapley:
I owe you an apology. I kept referring to Benito doing the calcs on this project. I was rummaging through the thread and see that it was you tht volunteered for the job! My most humble apologies.
So, have you got those preliminaries worked up yet?
Yes, I thought about that. I have a bit of experince with carbon fiber thread and it is very abrasive and doesn't have a high natural lubricity.Originally posted by barfle:
I have no idea what the surface friction of carbon nanotubes is, but somehow I wouldn't be surprised if they were pretty close to that of teflon, just because nature is a mother sometimes.
The definition of tractive roller is that it has enough grip built into the surface to prevent slippage. Also you can artifically increase grip by squeezing the rollers together.That would tend to mean that simply grasping the ribbon would be risking slippage. Maybe there would be some form of traction device, similar to a rack that could be attached to the ribbon, or if the ribbon exhibited adequate wear characteristics, a pair of gears, one on each side of the ribbon, to grip it with the teeth. The artist's concept shows something similar to tank or bulldozer treads (although they may be smooth) on both sides of the ribbon, undoubtedly squeezing it to provide adequate friction.
You'd still have the same problems of massive forces as you would need to pull the end rollers apart with sufficient force to keep the belt operating.Of course, another distinct possibility is to use it just like an elevator, with the ribbon fixed to the car, with a counterweight. How about having the ribbon be a belt, with the propulsion provided from the ends? No engine to move up and down with each load that way.
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