Search found 41 matches

by RestingDoll
May 24th, 2017, 9:47 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 36908

Re: Wind Power B/C

RestingDoll, what were your blades like in terms of the questions above? They were drag based, spanned the entirety of the radius (12.8 cm?), starting at 4 cm wide slowly narrowing out, and made of a pepsi bottle. If you don't mind sharing how different was this from your States blade both performa...
by RestingDoll
May 24th, 2017, 4:52 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 36908

Re: Wind Power B/C

I'm also curious to know this. Also, anyone know the top voltage scores? We came in 8th with 335 on low and 593 on high. Test was also ok (@ shadow flicker lol). RestingDoll, what were your blades like in terms of the questions above? They were drag based, spanned the entirety of the radius (12.8 c...
by RestingDoll
May 23rd, 2017, 8:44 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 36908

Re: Wind Power B/C

Does anyone know what the best blades at nats looked like? Were they lift-based? Were they 3d printed? What material were they made of? Did they extend to the center of the CD or only near the outside? I'm also curious to know this. Also, anyone know the top voltage scores? We came in 8th with 335 ...
by RestingDoll
May 22nd, 2017, 8:03 pm
Forum: 2017 Nationals
Topic: National Test Discussion
Replies: 127
Views: 19801

Re: National Test Discussion

Widi (15) - Fairly standard build, but it was pretty much what I expected. The one metal piece(honestly not sure what it was) on the one side was difficult. Hovercraft (30) - Oh boy. Test was pretty difficult, with a variety of questions. Expected more fluids (viscosity, pipe flow), but the ones pro...
by RestingDoll
May 10th, 2017, 7:19 pm
Forum: 2017 Lab Events
Topic: Hovercraft B/C
Replies: 906
Views: 124211

Re: Hovercraft B/C

Hey guys, I'm kinda new around here so please excuse me if I'm breaking some sort of rule(s) by butting in here, but I've got a question about a question I just saw on a Hovercraft test. The question reads: "A pipe carrying water at 20°C has a diameter of 2.5 cm. Estimate the maximum flow speed if ...
by RestingDoll
April 30th, 2017, 8:47 am
Forum: 2017 Invitationals, Regionals, and States
Topic: Pennsylvania 2017
Replies: 399
Views: 60700

Re: Pennsylvania 2017

https://docs.google.com/spreadsheets/d/ ... sp=sharing
Here's the Ohio predictor. I think it fills in some of the medal gaps.
by RestingDoll
April 21st, 2017, 3:34 pm
Forum: 2017 Question Marathons
Topic: Hovercraft B/C
Replies: 38
Views: 5351

Re: Hovercraft B/C

A small 60 g point mass starts sliding down a frictionless surface at 30 cm in height, then sticks to the end of a uniform rod of mass 120 g and length 40 cm. The rod rotates about a point "O" lengthwise and its moment of inertia about that point is given by 1/3 mr^2. After the point mass sticks to...
by RestingDoll
April 10th, 2017, 2:55 pm
Forum: 2017 Invitationals, Regionals, and States
Topic: State Tournament Results
Replies: 110
Views: 43362

Re: State Tournament Results

John Richardsim wrote: Connecticut B:
1. Lyme-Old Lyme Middle School
I believe Connecticut C was won by Hopkins School
by RestingDoll
March 14th, 2017, 12:10 pm
Forum: 2017 Question Marathons
Topic: Hovercraft B/C
Replies: 38
Views: 5351

Re: Hovercraft B/C

A small 60 g point mass starts sliding down a frictionless surface at 30 cm in height, then sticks to the end of a uniform rod of mass 120 g and length 40 cm. The rod rotates about a point "O" lengthwise and its moment of inertia about that point is given by 1/3 mr^2. After the point mass sticks to ...
by RestingDoll
March 13th, 2017, 7:44 pm
Forum: 2017 Question Marathons
Topic: Hovercraft B/C
Replies: 38
Views: 5351

Re: Hovercraft B/C

Sorry, I thought that since I got it wrong, someone else could have a go at the right answer and put up the next question. You drop a ball from a 26 meter tall building on earth. Find the velocity when the ball hit the ground. Assume no air resistance and gravity as 9.81. Show all work. Wait lol ho...

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