Prospect Invitational (Winning it, that is)

The Prospect Invitational yesterday (Saturday, October 29th, 2011) was my first debate tournament for a full year—I didn’t manage to get to any as a junior. As a result, it came to be somewhat of a surprise as my partner (Anjana Rao) and I finished the tournament with a 5-0 undefeated record.

More than just the debate, though, my speaking seems to have changed pretty significantly—I used to get relatively few speaker points, and rely on argumentation to win, but at Prospect I walked away with the second speaker award (following first by only 0.25 speaker points).

Since Prospect had hidden elimination rounds, the final round (that is, the Finals round) was rather interesting. The second speaker on the team we were supposed to debate (Milpitas GO) had decided to leave with his girlfriend, since we were unaware that it was actually the Finals round. As a result, another member of their team stepped in to fill the spot, and we began the debate. Just after my first speech, however, their coach ran in and forfeited them, giving us the win… with a seven-minute round.

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October 30, 2011

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Speech and Debate

I’ve converted… TI-89!

Due to Multivariable Calculus, I’ve finally converted to a TI-89 Titanium… the TI-84+ just can’t cut it anymore. It’s served me well (since 7th grade!) but I feel it’s time to move on.

The TI-84+ and the TI-89 Titanium

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October 1, 2011

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School

Update: Wheels!

The Companion Cube—with new wheels!

I finished up the wheel replacement today with a pair of Vex Omniwheels, which have little rollers on them to allow movement perpendicular to the way they’re mounted, thus resolving the previous shearing force problems.

An Omniwheel

Unfortunately, since my motor shafts are 6mm single-flat and the Vex wheels are designed for 0.125″ square, I had to drill the wheels out a bit to make it work. Lacking a drill press, I made do with a slightly smaller drill bit, a hand drill, and a rotary tool, adding in a few screws to adjust the fit and to lock the wheel against the single flat. Although there were some mistakes, I think it turned out rather well:

Closeup of the left side of the robot

Closeup of the right side of the robot

The larger wheels get over bumps more easily, and they make it faster, both to turn and to drive—the omniwheels are especially helpful while turning, as they allow me to treat the system as a two-wheel system at the back instead of a four-wheel system like it actually is.

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September 30, 2011

Categories:

Robotics

Water Rockets

So we just finished up our unit in Engineering Tech on water rocketry, and I figured I’d post some pictures of our rockets. They all beat the required 150 foot height by a decent amount—our highest was about 260 feet from the ground, as measured by the rather inaccurate triangulation based altimeters.

The Bee Bomb

The Bee Bomb—close up

Bumblebee One

Bumblebee One, again

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September 30, 2011

Categories:

School

Status Update: Rolling Along

I’m still not quite done with all of the updates for my robot—most notably the wheels. I’ve actually run into a little trouble: the wheels I was intending to use are actually too good at sticking to the ground to turn easily—the rubber tires fall off every once in a while. To solve this, I’m planning to use some omniwheels for the front, which should convert the drive system from four drive wheels to only two, and thus reduce the shearing force on the wheels.

Got some new rear drive wheels, but I'm still waiting on the omniwheels for the front.

I’ve also got a (really short) video from before I started the wheel switch:

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September 27, 2011

Categories:

Robotics

 
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