Search found 77 matches

by NinjaChicken
March 16th, 2012, 8:58 am
Forum: 2012 Build Events
Topic: Gravity Vehicle C
Replies: 805
Views: 100907

Re: Gravity Vehicle C

What would be the problem with putting the mass behind the rear axle? Not completely behind it, but something like 3/4 of the mass.
by NinjaChicken
March 15th, 2012, 8:12 am
Forum: 2012 Build Events
Topic: Gravity Vehicle C
Replies: 805
Views: 100907

Re: Gravity Vehicle C

It can be moved left/right (about 7cm each direction). The paperclip can be moved along the bar (taped in position), over a distance of about 35cm. Our wheel circumference is about 18cm, which means an adjustment range of almost 1 rev, plus, and minus. Our brake system.....increments/is set to a pa...
by NinjaChicken
March 11th, 2012, 2:12 pm
Forum: 2012 Build Events
Topic: Gravity Vehicle C
Replies: 805
Views: 100907

Re: Gravity Vehicle C

i consulted a physics professor and did some calculations with him based on the curve of our ramp and the size of the vehicle; the calculations were all wrong; the estimated time was about 4.1 seconds, but our vehicle traveled the 10 meters in about 1.12 seconds. Pretty fast. O.O I give up. I can't...
by NinjaChicken
March 4th, 2012, 10:57 am
Forum: 2012 Lab Events
Topic: Keep the Heat B/Thermodynamics C
Replies: 661
Views: 103434

Re: Keep the Heat B/Thermodynamics C

It's that time of year again where those of us on the national rules committees start working on the rules for next year. As I've done in the past, I'm soliciting suggestions for rules changes for Keep the Heat / Thermodynamics. Please don't just say "I don't like XXXX", but rather make concrete su...
by NinjaChicken
February 24th, 2012, 4:21 pm
Forum: 2012 Lab Events
Topic: Forensics C
Replies: 204
Views: 52038

Re: Forensics C

For the first invitational that I went to, the ES accepted both plastics because he didn't give any further information.
by NinjaChicken
February 24th, 2012, 4:02 pm
Forum: 2012 Build Events
Topic: Robot Arm C
Replies: 531
Views: 70724

Re: Robot Arm C

Has anyone had trouble with VEX motors sometimes not turning? I can hear a response in the motor, but it won't move. It will SOMETIMES randomly come back and start turning after I wiggle the joystick or push the button a few times or turn the controller off and on. Mostly it doesn't respond and I j...
by NinjaChicken
February 24th, 2012, 1:55 pm
Forum: 2012 Build Events
Topic: Robot Arm C
Replies: 531
Views: 70724

Re: Robot Arm C

Has anyone had trouble with VEX motors sometimes not turning? I can hear a response in the motor, but it won't move. It will SOMETIMES randomly come back and start turning after I wiggle the joystick or push the button a few times or turn the controller off and on. Mostly it doesn't respond and I ju...
by NinjaChicken
February 13th, 2012, 1:33 pm
Forum: 2012 Build Events
Topic: Robot Arm C
Replies: 531
Views: 70724

Re: Robot Arm C

How many motors are you guys using? We used 5 and got like 10th. Motors shouldn't matter for scoring that much, seeing as it's only a tiebreaker. We also are using 5. Ten bucks the national champion uses only three. I agree, but I'm assuming most teams aren't going to be vying for the top spot at n...
by NinjaChicken
February 13th, 2012, 3:50 am
Forum: Helicopters C
Topic: Duration
Replies: 219
Views: 33534

Re: Duration

Apparently the top score at the invitational I was at this weekend was 224 seconds (3 min 44 sec)

I don't know if they had a Chinook design, but if they did, that's still 1 min 14.7 seconds.

All the top 6 scores were above a minute 30 sec
by NinjaChicken
February 13th, 2012, 3:44 am
Forum: 2012 Build Events
Topic: Robot Arm C
Replies: 531
Views: 70724

Re: Robot Arm C

JohnHa wrote:How many motors are you guys using? We used 5 and got like 10th.
Motors shouldn't matter for scoring that much, seeing as it's only a tiebreaker. We also are using 5.

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