Search found 25 matches

by zcshiner
November 2nd, 2010, 2:44 pm
Forum: 2011 Build Events
Topic: Mousetrap Vehicle C
Replies: 441
Views: 51065

Re: Mousetrap Vehicle C

masterhat wrote:Not necessarily. A light car might not have enough traction and could skid.
I had that problem last year, I ended up adding some 25g weights over each wheel to aid in braking & traction.
by zcshiner
October 1st, 2010, 1:07 pm
Forum: Mission Possible C
Topic: Blocks Task
Replies: 103
Views: 20431

Re: Blocks Task

Already the event is becoming more than just "do whatever the rules say". Strategies are growing and compromises are being made. We did good this year. I agree, but I also feel that certain tasks (Sign Task) introduce uncontrolled variables (air currents, static cling, etc.), and make aspects of th...
by zcshiner
October 1st, 2010, 12:58 pm
Forum: Mission Possible C
Topic: Screw Task
Replies: 20
Views: 7558

Re: Screw Task

does the screw itself have to move back and forth or can it be like a wing nut on a threaded rod moving up and down? Rule 4.d says: "Turn a screw so that its tip stays in contact with an object..." That seems to indicate that the screw itself has to move and the screw's linear movement pushes the o...
by zcshiner
October 1st, 2010, 6:37 am
Forum: Towers B/C
Topic: Testing Apparatus
Replies: 26
Views: 8972

Testing Apparatus

My coach and I have a question. He usually runs the Elevated Bridge or (this year) Towers event at our regional competition. We have a concern with Rule # 5.h The load held must be measured in kilograms to the nearest gram. Does anyone know where to get a balance or scale that can measure up to 15.2...
by zcshiner
September 21st, 2010, 8:11 pm
Forum: 2011 Build Events
Topic: Mousetrap Vehicle C
Replies: 441
Views: 51065

Re: Mousetrap Vehicle C

This may be a stupid question, but how are you guys attaching your lever arm to your mousetraps? last year we had a really inelegant and weighty hotglue-string solution, and we can't seem to find dowels that can bridge the two lever arms to superglue without weighing the car down... Zip Ties. They ...
by zcshiner
September 20th, 2010, 4:48 pm
Forum: 2011 Build Events
Topic: Mousetrap Vehicle C
Replies: 441
Views: 51065

Re: Mousetrap Vehicle C

On the topic of the class of vehicles. I built a version of Class 1.

The first trap was wound up, and as it traveled out, it would wind up the string on the second axle. Then the second trap would trigger and it would travel back to the starting line.

I took 3rd at states with this design.
by zcshiner
March 5th, 2010, 6:39 pm
Forum: 2010 Lab Events
Topic: Experimental Design B/C
Replies: 263
Views: 37791

Re: Experimental Design B/C

Are we allowed to bring any reference materials? It says that we need to bring goggles, rulers, calculator, and a stopwatch, but never forbids anything else.
by zcshiner
February 24th, 2010, 3:05 pm
Forum: Mission Possible C
Topic: Electronics
Replies: 61
Views: 13271

Re: Electronics

Now, on the melting part, that's the part thats bugging me most right now, because I thought it would be just like how you put a paperclip to a battery and it gets hot, but as I did that, it didn't work either, so that part is just ehh. Get an old toaster and take the heating element (nichrome wire...
by zcshiner
February 6th, 2010, 12:13 pm
Forum: Mission Possible C
Topic: Electronics
Replies: 61
Views: 13271

Re: Electronics

Radio Shack does sell a 9v relay. And yes, its the blue one.
by zcshiner
February 3rd, 2010, 8:01 pm
Forum: Mission Possible C
Topic: Q&A
Replies: 10
Views: 3128

Re: Q&A

This should go without saying, but match voltages carefully.

If you have a 3volt led, do not hook it up to 9volts. Same things with relays and motors. They will burn out fast.

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