Boomilever B/C

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UQOnyx
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Re: Boomilever B/C

Post by UQOnyx » February 25th, 2014, 4:12 am

whoa what!? nxtscholar, how would you make one yourself!?
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Re: Boomilever B/C

Post by sjwon3789 » February 25th, 2014, 5:05 pm

GeorgeInNePa wrote:
1) See the hole in the tube at the distal end? The loading block eye-bolt goes through there.

2) The tube is hollow. It's 1/16" balsa, soaked in water and "wrapped" around a piece of 1/2" copper water pipe.

3) The tension member goes through the tube and is glued into a wooden "plug", coincidentally, the loading block also bears on the same block.

4) We've had good luck with 1/16" balsa. The finished booms usually weigh 10.5g to 11.5g, depending on the sheet density. I want to test some 1/32" this year.

We will be testing a tube at the Rustin Invitational tomorrow. It's heavy, over 13g...
This is kinda old but information pertaining to the tube booms, isn't copper water pipe banned...? And how would you "wrap" around the wood..
2013 Events: Boomilever, Keep the Heat, WIDI
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Re: Boomilever B/C

Post by chinesesushi » February 25th, 2014, 5:59 pm

sjwon3789 wrote:
GeorgeInNePa wrote:
1) See the hole in the tube at the distal end? The loading block eye-bolt goes through there.

2) The tube is hollow. It's 1/16" balsa, soaked in water and "wrapped" around a piece of 1/2" copper water pipe.

3) The tension member goes through the tube and is glued into a wooden "plug", coincidentally, the loading block also bears on the same block.

4) We've had good luck with 1/16" balsa. The finished booms usually weigh 10.5g to 11.5g, depending on the sheet density. I want to test some 1/32" this year.

We will be testing a tube at the Rustin Invitational tomorrow. It's heavy, over 13g...
This is kinda old but information pertaining to the tube booms, isn't copper water pipe banned...? And how would you "wrap" around the wood..
You remove the copper thing to make a hollow tube. And you soak it so you can wrap it around. GeorgeInPA or anyone else, how long do you soak in the water for?
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Re: Boomilever B/C

Post by DoctaDave » February 25th, 2014, 9:05 pm

xchampkevin wrote:1st Mesa Robles, 2nd Chapparal, 3rd (us) Suzanne
Do you remember what kind of boomilever Mesa Roble used? (Box, tube, normal etc.)

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Re: Boomilever B/C

Post by xchampkevin » February 26th, 2014, 11:33 am

I think it was a box, held all the weight.
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Re: Boomilever B/C

Post by embokim » February 26th, 2014, 3:24 pm

What is a goid score,
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Re: Boomilever B/C

Post by chinesesushi » February 26th, 2014, 4:21 pm

embokim wrote:What is a goid score,
depends on region. usually >1000 pretty much guarantees a place. anything >1500 is probably top 1 or 2 in state/regional.
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Re: Boomilever B/C

Post by xAkali » February 26th, 2014, 8:43 pm

xchampkevin wrote:I think it was a box, held all the weight.
and it got a score of 1800? that's ridiculous. Was it just a simple box?

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Re: Boomilever B/C

Post by UQOnyx » February 27th, 2014, 9:44 am

He means a box beam boomilever, depending on how it's made, an extremely efficient design.
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2013 Events:
Boomilever
Shock Value
Forestry


I know the voices aren't real, but they have some great ideas..

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Re: Boomilever B/C

Post by Can_Of_Tuna » February 27th, 2014, 11:42 am

Would a boomilever with a triangular compression box be a good idea?

Also, I realized the problem with my elliptical boomilever. I cut the bent pieces too short, and thus they simply sat there instead of actively pushing against the ends of the boom.
The proctor also had the mounting hooks two inches out, instead of the correct one. My teammates and I only realized this after the competition, though.

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