Quote:
Originally posted by Jnadke
Raven_Writer:
I would like to start of by saying I'm sorry if I caused you any anguish. As said above, there's never a time not to learn. I was merely trying to explain to you the physics behind it.
There are too many misconceptions between what I actually said and what people think I said. If you read, I actually praised what they built. I believe that it a very quality piece of engineering, and that it would be very useful in competition. What I was trying to do is explain how it would not be useful if you didn't understand the physics behind it.
FIRST is about inspiration. It's hard to be inspired if you don't understand what you are trying to be inspired about. Science and Technology have one thing in common: Physics. You'll take it if you ever get into a science/engineering-related field.
The ramp is 14.5 degrees, right?
The sine of 14.5 is 0.25. On the other hand, the cosine of 14.5 is 0.97. What does this mean? 97% of the force exerted by a robot going up the ramp will be exerted in the horizontal direction. Only 25% of that force will be exerted upwards. For all practical puposes, 97% is very close to 100%. Given that the 25% upward force will actually decrease your ramp traction, 100% horizontal force is a very generous estimate.
Did you guys use a motor to suck the air out of the cylinder? What kind of valve system did you use? Pressure valves? What size bore did you use? I'm just curious about the design. It might be of use in the future...
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I'm also sorry, if I got an attitude yesterday. Today I'm refreshed [w00t].
I'm aware of the physics though, but thank you for correcting me. Matt said yesterday it was prob. about 50 lbs., and he's probably right.
We used 2 cylinders, and a air compressor for the vacuum effect. I dunno if we used a bore, I don't think so though. Later on I'll grab the specs of it, and post it. I do know we had 60 psi regulated. And it doesn't work out well when the platform is dirty.