Boomilevers 2019 (B/C)
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Re: Boomilevers 2019 (B/C)
As of the 2014 switch to a hook rather than a bolt, the top part is typically a rod parallel to the wall which just hangs onto the hook. The bottom part rests against the wall freely.pajobubo wrote:I’m confused about how we have to build the boomilever so it can attach to the wall. Or I guess what the little piece to attach to wall looks like. Can we just google the rules from past or do you guys just have them?
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Re: Boomilevers 2019 (B/C)
I think that will totally depend on what they come up with as a means of attachment. In years past, we have done both laminated flat bases that bolt to the vertical wall, and non-laminated dowels that hook behind the eye hook. In both cases, we used medium to dense balsa.MadCow2357 wrote:So what type of wood are you guys going to use for your mounting pieces?
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Re: Boomilevers 2019 (B/C)
I agree. Balsa will be my first try but I'll most likely go bass.dholdgreve wrote:I think that will totally depend on what they come up with as a means of attachment. In years past, we have done both laminated flat bases that bolt to the vertical wall, and non-laminated dowels that hook behind the eye hook. In both cases, we used medium to dense balsa.MadCow2357 wrote:So what type of wood are you guys going to use for your mounting pieces?
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Re: Boomilevers 2019 (B/C)
Note that heavy balsa and basswood have about the same tensile strength. Quality of the wood will be a major difference. All balsa and all basswood have won in the past.
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Re: Boomilevers 2019 (B/C)
I have started (and possibly finished) two boomilever prototypes (ie ones that may not exactly fit length reqs by maybe 2 cm.) Do u think it is better to go with the simple, basic design, or the triangular pyramid design? I think the latter of my two is much lighter+stronger.
As for wood, i guess u could say im in the 'elite', 'cause i use both woods.
As for wood, i guess u could say im in the 'elite', 'cause i use both woods.
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Wait, or is that wheels? I can never remember.
balsa man he made the little people build...
Wait, or is that wheels? I can never remember.
balsa man he made the little people build...
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Re: Boomilevers 2019 (B/C)
What are you calling a simple basic design and what are you calling a pyramid design. PM me a sketch with dimensions of both and I will put it on my 3D computer program. Also wood weights per CF of each. prefer lb/cf
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Re: Boomilevers 2019 (B/C)
I will get back to u on that, just give me a few. As for the simple design, just look at the wiki. Mine is basically that, but with very thick compression and thinner basswood tension pieces. For the triangular pyramid, it's literally a triangular pyramid with two right triangle faces, one acute/isoceles face. My cross bracing is INCREDIBLY complicated and i dont want to draw it. its summer vacation. If u don't know what one of those looks like, i can't help u. look it up. Also, i am informally building, so i haven't actually drawn these designs up. i have not checked my wood weights, as it is not reg. season and im not actually using these in comp. im only div. B dude.
On a different note, it weighs a bit north of nine grams, and should get an efficiency of ~1200???? Haven't tested.
What do u guys thing a winner would look like??? What would its score be?
On a different note, it weighs a bit north of nine grams, and should get an efficiency of ~1200???? Haven't tested.
What do u guys thing a winner would look like??? What would its score be?
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Wait, or is that wheels? I can never remember.
balsa man he made the little people build...
Wait, or is that wheels? I can never remember.
balsa man he made the little people build...
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Re: Boomilevers 2019 (B/C)
Looking at 2014 Nationals scores for Boomilever:triangulator wrote: What do u guys thing a winner would look like??? What would its score be?
1: 2322
6: 1469
10: 1294
Obviously the rules are different, but you can probably get an idea by looking at the 2014 rules parameters/dimensions and predicting if you think efficiencies will be higher or lower. I don't personally have much experience with Balsa so I won't try to make any predictions, but I'd be interested to hear someone who does have experience try to make a prediction.
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