Quote:
Originally Posted by NextPerception
I make what is coined a full body spinner. For anyone not familiar with the world of battlebots, a full body spinner resembles a hockeypuck in apearance. A full body spinner has a spinning outside shell with sharp blades on it with a stationary inner chassis that has the drivetrain and spin motors as well as all the other robot essentials on it.
The reason I picked a seven story drop is because I make two assumtions. The first is that the most energy my robot will ever have to contend with is a little more than twice the amount I can dish out. The main component I am really examining with the seven story drop is the center shaft that the shell rotates on and the plates that this are bolted to. The worst thing that could happen to me in battle is my center shaft bending or the plates that support the center shaft being tweaked so the center shaft iss no longer on the vertical axis.
The reason I want to replace the banebots motors is not so much related to the drop test because they are mounted securley enough in the chassis to survive that. My previous drop tests have proven that. It is related to the FEA analysis and the real world results I was getting with them last year. They would start binding in as little as one fight. Also, just a note, I do support the other side of the shaft very well.
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Seven stories is a bit extreme, and way more than anything you'd ever see in combat robotics. Negating air resistance, any object through off a seven story building will reach a speed of about 20 meters per second (or about 45 miles per hour) when it hits the ground.
If you want to do some simple physics equations, you can calculate the exact final speed at impact from a seven story height, as well as how much kinetic energy the robot would have when it hits the ground. Compare this to the kinetic energy that the spinner would have at full speed, and you may find that a one or two story drop would probably* be a lot more realistic (and easier to design for).
* Just a swag. Do the math for an exact answer. There is great truth and wisdom to be held in the numbers.