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by andrewwski
September 3rd, 2019, 11:21 pm
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 22
Views: 1231

Re: Ping Pong Parachute B/C

Well 4.b. requires that teams justify their pressure selection using past trials (which should indicate their device can tolerate that pressure), and 5.c. requires the ES to verify they actually pressurized the device to the stated pressure. Also, since hitting the ceiling incurs a large penalty (T...
by andrewwski
September 3rd, 2019, 1:21 pm
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 22
Views: 1231

Re: Ping Pong Parachute B/C

Looks like the rules do not give a maximum allowable pressure? This is going to need to be addressed. Well 4.b. requires that teams justify their pressure selection using past trials (which should indicate their device can tolerate that pressure), and 5.c. requires the ES to verify they actually pr...
by andrewwski
September 3rd, 2019, 11:41 am
Forum: Ping Pong Parachute B/C
Topic: Ping Pong Parachute B/C
Replies: 22
Views: 1231

Re: Ping Pong Parachute B/C

Looks like the rules do not give a maximum allowable pressure? This is going to need to be addressed.
by andrewwski
September 3rd, 2019, 11:40 am
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 103
Views: 4206

Re: Wright Stuff C

Been waiting for biplanes to come back! This should be fun, especially with changing the direction pretty much being required to be competitive.
by andrewwski
June 5th, 2019, 1:45 pm
Forum: 2019 Nationals
Topic: Nationals Event Discussion
Replies: 124
Views: 14210

Re: Nationals Event Discussion

So someone came into my sounds testing room with me and basically videoed/photographed (I think videoed, but not sure) my entire build run. Is this normal? I’ve never encountered something like this before. Normally I wouldn’t raise any eyebrows, except this event is coming back next year, and ther...
by andrewwski
December 6th, 2018, 10:36 am
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 799
Views: 51303

Re: Wright Stuff C

I saw a few teams use some sort of plastic mylar type of tissue with green lettering on it. Anyone know the name of it? I'm not quite sure if my answer is correct, but I think it might've been the mylar provided in the ward's kit. Last year, my partner and I ordered a ward's kit, and the mylar cove...
by andrewwski
October 7th, 2018, 10:37 pm
Forum: Alumni
Topic: Test writing with LaTeX
Replies: 5
Views: 748

Re: Test writing with LaTeX

Images are easier in LaTeX. Way less fighting to put them where you want them. For example: \begin{figure}[!h] \centering \includegraphics[width=6 cm]{Figure1.jpg} \end{figure} The "!h" forces the figure to appear exactly where you want it to. The exam class makes the formatting pretty easy. I use L...
by andrewwski
February 15th, 2018, 11:08 am
Forum: 2018 Study Events
Topic: Astronomy C
Replies: 202
Views: 24202

Re: Astronomy C

Also, does anyone know a formula I could use to solve this? The ratio of orbital velocities for a star to its planet is 0.0083. The system has an inclination derived of 75 degrees, and the mass of the star is 0.66 solar masses. What is the mass of the planet in Jupiter masses? A bit late on this (a...
by andrewwski
April 1st, 2017, 6:07 pm
Forum: 2017 Lab Events
Topic: Hovercraft B/C
Replies: 906
Views: 114487

Re: Hovercraft B/C

I agree. This 5 Ohm beast -- which looks like it spent a decade in a Kazakhstan warehouse -- worked well for us: https://www.amazon.com/gp/product/B00K82TH7W/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 What are the Coulombs and mAh of your battery? I think we tried that same potentiometer, but we b...
by andrewwski
March 28th, 2017, 6:03 pm
Forum: Electric Vehicle C
Topic: Electric Vehicle C
Replies: 179
Views: 22091

Re: Electric Vehicle C

Has anyone tried using a PID loop to correct for any error in their Arduino distance programming? If so, has it helped significantly decrease your distance score? I wrote some PID code but didn't implement it because there's not much of a point when you can get centimeter accuracy using an encoder....
by andrewwski
March 22nd, 2017, 8:58 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34257

Re: Wind Power B/C

My team and I are having a very hard time understanding how to solve for calculating power loss along a line. I think the terms / equations are similar to Ohms Law but not quite the same and that is mixing us up. Here is an example question for an older test: A power plant in Chicago is generating ...
by andrewwski
March 17th, 2017, 12:12 pm
Forum: Electric Vehicle C
Topic: Question about rules regarding length and width design of the electric vehicle?
Replies: 9
Views: 1886

Re: Question about rules regarding length and width design of the electric vehicle?

Wouldn't say it's a loophole. I've seen a lot of EV/Scrambler/Mousetrap/Gravity Vehicle designs over the years that have parts of the vehicle that extend outside of the wheelbase. If the intent of the rules was to restrict the vehicles to be smaller than that size, it would say so explicitly (probab...
by andrewwski
March 15th, 2017, 11:09 am
Forum: 2017 Lab Events
Topic: Hovercraft B/C
Replies: 906
Views: 114487

Re: Hovercraft B/C

Could be a few different things going on. It looks like those motors are fairly small, and they aren't typically run with that much voltage. It's possible that if the motor is running under no load (freely), it works fine, but will encounter issues if run under load. When you add a load to the motor...
by andrewwski
March 3rd, 2017, 12:40 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34257

Re: Wind Power B/C

Btw my binder is not trash, but it is bad compared to Community MS (won 4th in nats last year and same people doing this year). I have barely any chance of beating them, but I still have some hope. We compete in NJ. I want to beat Community really badly, and we had a chance until yesterday when our...
by andrewwski
February 24th, 2017, 2:31 pm
Forum: 2017 Invitationals, Regionals, and States
Topic: New York 2017
Replies: 176
Views: 27757

Re: New York 2017

One thing - apparently Lake Erie-Niagara isn't in B, it's covered by Midwestern? Lake Erie-Niagara has it's own B division regional - this year it's March 4 at Waterfront Elementary School in Buffalo. Ok. How recent is this? Several older threads have no mention of it. At least since 2003. Probably...

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