Storm the Castle B

User avatar
earthbot25
Member
Member
Posts: 90
Joined: April 26th, 2009, 10:46 am
Division: Grad
State: PA

Re: Storm the Castle B

Postby earthbot25 » January 28th, 2011, 5:33 pm

I know people have been discussing slings, but does anyone have any good sources on how to make the pouch that holds the projectile? or what shape roughly to make that?
Harriton Class of 2014

Past Events: C: Materials Science, Chemistry Lab, TPS, Experimental Design, Mission Possible, Microbe Mission, WIDI, Helicopters. B: Bio-Process Lab, Towers, Microbe Mission, Robocross, Physical Science Lab

wlsguy
Member
Member
Posts: 366
Joined: March 23rd, 2009, 9:08 am
Division: Grad
State: OH
Location: Ohio

Re: Storm the Castle B

Postby wlsguy » January 28th, 2011, 7:22 pm

I would like to thank everyone in advance for helping me. I would like to ask if anybody has any possible ideas for what I could do for the differing weight for the projectile. The projectiles have to be in 20-60 range, therefore I want to test a 20,30,40,50, and 60 gram options. I know that a racquetball will work for the 40 gram option. A tennis ball is around 60 grams so that works for that. But I have no idea what to do for the 20, 30, and 50 options, can anybody help me? Thank you :D
Find rubber bouncy balls (or others) that are a little less than required. add layers of duct tape until it is up to the weight you want.

User avatar
disownedpear
Member
Member
Posts: 40
Joined: October 13th, 2010, 12:33 pm
Division: B
State: MD
Location: kings dominion

Re: Storm the Castle B

Postby disownedpear » January 29th, 2011, 6:29 pm

would a tennis ball work?
we have the answer to life, the universe, and everything
ImageNorth Bethesda middle school Image

User avatar
Liv
Member
Member
Posts: 274
Joined: December 31st, 2008, 8:20 am
Division: C
State: NY
Location: Port Washington, NY

Re: Storm the Castle B

Postby Liv » January 30th, 2011, 7:38 am

would a tennis ball work?
For a projectile? Yep, that would work, would they most likely use it? Probably not, I just went to an invite and they used there hacky sacks, then blue/yellow/red ones.

User avatar
Bubba1960
Member
Member
Posts: 108
Joined: September 27th, 2010, 6:28 pm
Division: B
State: MD
Location: 12 Grimmauld Place

Re: Storm the Castle B

Postby Bubba1960 » January 31st, 2011, 1:38 pm

Liv, what material is your sling?
I reject your reality and substitute it with my own ~ Adam Savage
North Bethesda Middle School
Image

User avatar
disownedpear
Member
Member
Posts: 40
Joined: October 13th, 2010, 12:33 pm
Division: B
State: MD
Location: kings dominion

Re: Storm the Castle B

Postby disownedpear » January 31st, 2011, 4:17 pm

what materials are good for a sling, ive been using carpet samples
we have the answer to life, the universe, and everything
ImageNorth Bethesda middle school Image

User avatar
Liv
Member
Member
Posts: 274
Joined: December 31st, 2008, 8:20 am
Division: C
State: NY
Location: Port Washington, NY

Re: Storm the Castle B

Postby Liv » January 31st, 2011, 4:34 pm

Liv, what material is your sling?

It's a thin leather, I'll take pictures of it this week.

User avatar
Bubba1960
Member
Member
Posts: 108
Joined: September 27th, 2010, 6:28 pm
Division: B
State: MD
Location: 12 Grimmauld Place

Re: Storm the Castle B

Postby Bubba1960 » January 31st, 2011, 5:52 pm

what materials are good for a sling, ive been using carpet samples
Its a SOFA sample. (idiot)
I reject your reality and substitute it with my own ~ Adam Savage
North Bethesda Middle School
Image

User avatar
brobo
Exalted Member
Exalted Member
Posts: 445
Joined: April 8th, 2009, 2:44 pm
Division: C
State: TX
Location: MINECRAFT!
Contact:

Re: Storm the Castle B

Postby brobo » February 1st, 2011, 4:22 am

Mine too is a thin leathery type material tied with kite string to the eye and nail. What I've found is that there's no magical "this is how the sling should be", rather the only way you'll find a working combination of sling material, string length, and pin angle is through hours of trial, error, blood, and tears. Good luck! ;)
Image--Texas!

brobo's Userpage

"Let's put all our differences behind us, for science. You monster."

Ubuntu is awesome.

User avatar
emaudge14
Member
Member
Posts: 2
Joined: February 2nd, 2011, 1:24 pm
Division: B
State: PA

Re: Storm the Castle B

Postby emaudge14 » February 2nd, 2011, 1:30 pm

For this event, my partner and I built a floating arm trebuchet and are having trouble with the pin on our floating arm. What did you use for it ?(;


Return to “2011 Build Events”

Who is online

Users browsing this forum: No registered users and 1 guest