Boomilever B/C

Jim_R
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Boomilever B/C

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

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thsom
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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

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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
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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?

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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.
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retired1
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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
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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 ;)

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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?

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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
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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.


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