hmmm.. yeah I think you might be able to build something to make it all work. But then again HCl is a dangerous substance. Plus trying to create enough helium and push it into a ballon is pretty hard to do in 3 minutes and pretty hard to do at all. If someone actually built that using safe chemicals and made it score a point, that would be truly awesome .Tie it to a weight with a slip knot, push it into the north, drop the ball into a cup that has a hole in the bottom big enough to let the ball touch the floor, therefore the ball is in the north zone and at it's starting height, open up the knot and watch the balloon and ball float away. If time stops, grab the string's spool with the arm, and the balloon will stop. Measure the bottom of the ball through the hole in the cup.
For the storage issue, one can make hydrogen quickly by mixing Zn and HCl, fed into the balloon, and then something to stop the hydrogen from escaping.
floating up towards very hot, incandecent light bulb fixtures...Yeah... sustaining a Zn + HCl reaction to generate enough hydrogen to pressurize and fill a balloon is a major feat by anyone, and to do it in a small enough space as a robot arm... Not to mention, not only did you start with HCl(highly concentrated most likely), but no you've got a balloon full of H2, which is highly flammable. Neither one seems very safe to me
Winch servo club!!! Though I used mine with a set of gears to reduce it and add more torqueYup, winch servo all the way that's how I did it.
Yeah 2/5 tape measures I'll post a video of it going to like 20 feet later this week. It's pretty cool and fast, I can go to 20 feet in about 40 seconds or so. Though it loses stability at like 16 ish feet. I saw a few others tape measure devices too, I think ours was pretty cool because it used this little 3d printed parts that were pushed up by the tape measures to stabilize it every 1 foot to 2.5 feet later on.Same here, harryk Although given more time, I would've changed it to a regular high-torque servo with the potentiometer externalized to get the needed range and gearing- I didn't like having to trick the PID loop of my servo in order to get it to move fast enough.
Mr. Anderson, would you be able to give us any more information, qualitative or quantitative, about the points distribution, etc., from this year at Nationals, and how it compares to Robot Arm last year and/or other events you've been involved with?
Wait, jdogg, I was re-watching your video, and I recalled that you mentioned a "tape measure" device- do you mean to say that the yellow part of your height bonus that makes the extension happen is all supported by tape measure? Because if so that's absolutely brilliant!
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