Boomilever B/C

Jim_R
Admin Emeritus
Admin Emeritus
Posts: 283
Joined: May 13th, 2001, 4:22 pm
Division: Grad
Location: Pittsburgh, Pa
Contact:

Boomilever B/C

Postby Jim_R » August 14th, 2012, 11:13 pm

-The path of the Administrator is beset on all sides by the inequities of the selfish and the tyranny of evil men.

-Nothing\'s gonna get deleted. We\'re gonna be like three little Fonzies here. And what\'s Fonzie like? Come on, what\'s Fonzie like?
-Cool?
-Correctamundo. And that\'s what we\'re gonna be. We\'re gonna be cool. Now, I\'m gonna count to three, and when I count three, you let go of your mouse, and back away from the keyboard. But when you do it, you do it cool. Ready? One... two... three.

thsom
Member
Member
Posts: 241
Joined: December 27th, 2011, 10:26 am
Division: C
State: IL

Re: Boomilever B/C

Postby thsom » August 30th, 2012, 7:23 pm

Who's as psyched for this event as I am?!
I've got a 1.5" binder already full with designs

iwonder
Admin Emeritus
Admin Emeritus
Posts: 1112
Joined: May 10th, 2011, 8:25 pm
Division: Grad
State: TX

Re: Boomilever B/C

Postby iwonder » August 30th, 2012, 7:38 pm

I'm not that psyched, but I do have a really nice compression member and I've done more research than imaginable :D
'If you're the smartest person in the room, you're in the wrong room' - Unknown

noobforce
Member
Member
Posts: 70
Joined: March 14th, 2012, 3:13 pm
Division: C
State: NJ
Location: Somerset, New Jersey

Re: Boomilever B/C

Postby noobforce » September 1st, 2012, 5:43 am

Read the Wiki and looking at Boomilever pictures in the Image Gallery. Any other helpful techniques to build a Boom besides using Zigzags for bracings?

cngu23
Member
Member
Posts: 248
Joined: March 12th, 2011, 4:57 pm
Division: C
State: MD
Location: Maryland

Re: Boomilever B/C

Postby cngu23 » September 1st, 2012, 9:22 am

Haven't seen the rules sheet yet but do you attach it to the wall with bolts or make an overhang? I've seen both types used in the past.
Marriotts Ridge 11-
Walter Johnson 09-11

13 MD Regional/State
Material S (2/-) TPS (-/2)
12 MD Regional/State
Remote S(2/6) Water Q(2/4) Optics (-/5)
11 MD Regional
Remote S(2) Eco(2) D Planet(3)

retired1
Member
Member
Posts: 673
Joined: July 25th, 2012, 5:04 pm
Division: Grad
State: FL

Re: Boomilever B/C

Postby retired1 » September 1st, 2012, 9:29 am

I'm not that psyched, but I do have a really nice compression member and I've done more research than imaginable :D
What have you settled on? beam, I beam, box beam, truss, tube or????
Relative size??

iwonder
Admin Emeritus
Admin Emeritus
Posts: 1112
Joined: May 10th, 2011, 8:25 pm
Division: Grad
State: TX

Re: Boomilever B/C

Postby iwonder » September 1st, 2012, 10:14 am

Now there's the trick, isn't it? I've got two ideas in mind, both significantly smaller than what most people will probably build, one's a tube, and the others a rectangle, however the catch with both is how I attatch them to the tension members. I expect to be told by everyone that sees it that I'm crazy ;)

thsom
Member
Member
Posts: 241
Joined: December 27th, 2011, 10:26 am
Division: C
State: IL

Re: Boomilever B/C

Postby thsom » September 1st, 2012, 11:01 am

Have these 'radical' designs been tested yet? If so, how well have they held up?

fanjiatian
Member
Member
Posts: 243
Joined: March 16th, 2010, 6:46 pm
Division: Grad
State: -

Re: Boomilever B/C

Postby fanjiatian » September 1st, 2012, 11:32 am

How have you guys been connecting your tension and compression members?
If possible, draw a diagram (for my sake)

retired1
Member
Member
Posts: 673
Joined: July 25th, 2012, 5:04 pm
Division: Grad
State: FL

Re: Boomilever B/C

Postby retired1 » September 1st, 2012, 11:39 am

Now there's the trick, isn't it? I've got two ideas in mind, both significantly smaller than what most people will probably build, one's a tube, and the others a rectangle, however the catch with both is how I attatch them to the tension members. I expect to be told by everyone that sees it that I'm crazy ;)
Not crazy. It depends on a number of things. The main problem with a compression member is buckling. If it is built very strong and rigid, it probably will weigh too much to be competitive. Bracing from the tension member will preclude or reduce buckling in the vertical directions. If the compression member is two beams, then very light X bracing between them will reduce / eliminate buckling in the horizontal direction.

So crazy, no if it is built light. Testing will tell.

Faustina
Member
Member
Posts: 30
Joined: September 16th, 2011, 6:05 pm
Division: C
State: MI

Re: Boomilever B/C

Postby Faustina » September 1st, 2012, 12:47 pm

How have you guys been connecting your tension and compression members?
If possible, draw a diagram (for my sake)
Have you read this (http://scioly.org/wiki/Aia%27s_Boomilev ... Distal_End) yet? That's pretty much what I did on a practice boom and it worked great.

Aia
Staff Emeritus
Staff Emeritus
Posts: 235
Joined: April 1st, 2006, 11:48 pm
Division: Grad
State: WA
Contact:

Re: Boomilever B/C

Postby Aia » September 1st, 2012, 2:20 pm

I'm glad to hear it worked Faustina!

For reference, here's a link to my boomilever guide so people can read it from the top:
http://scioly.org/wiki/index.php/Aia%27 ... ever_Guide
Last edited by Aia on September 21st, 2012, 4:27 pm, edited 1 time in total.
Science Olympiad Alumna and Volunteer
Aia's Boomilever Guide: http://scioly.org/wiki/index.php/Aia%27 ... ever_Guide

iwonder
Admin Emeritus
Admin Emeritus
Posts: 1112
Joined: May 10th, 2011, 8:25 pm
Division: Grad
State: TX

Re: Boomilever B/C

Postby iwonder » September 1st, 2012, 2:24 pm

Have these 'radical' designs been tested yet? If so, how well have they held up?
The 'radical' part has been tested(i.e I've checked the compression member and the distal end to make sure they can hold up) this weekend the plan is too finally build 2 full booms and see if it works in reality.
'If you're the smartest person in the room, you're in the wrong room' - Unknown

retired1
Member
Member
Posts: 673
Joined: July 25th, 2012, 5:04 pm
Division: Grad
State: FL

Re: Boomilever B/C

Postby retired1 » September 1st, 2012, 2:48 pm

If you post the weight held and the boomilever weight, we will all have a target to shoot for.
Sounds like a competition before the regionals.
Let's have fun with this and learn or be challenged.

fanjiatian
Member
Member
Posts: 243
Joined: March 16th, 2010, 6:46 pm
Division: Grad
State: -

Re: Boomilever B/C

Postby fanjiatian » September 1st, 2012, 3:16 pm

How have you guys been connecting your tension and compression members?
If possible, draw a diagram (for my sake)
Have you read this (http://scioly.org/wiki/Aia%27s_Boomilev ... Distal_End) yet? That's pretty much what I did on a practice boom and it worked great.

Yup! I was wondering if anyone thought of other ways to do so.


Return to “Boomilever B/C”

Who is online

Users browsing this forum: No registered users and 15 guests