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Boomilever B/C
Posted: August 31st, 2020, 5:09 pm
by bernard
Boomilever B/C: Teams will design and build a Boomilever meeting requirements specified in the rules to achieve the highest structural efficiency.
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Past Threads: 2013,
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2020
Re: Boomilever B/C
Posted: September 8th, 2020, 8:51 am
by sciolyperson1
No major rule changes, only some rules clarifications.
- Loading assembly can be assembled and disassembled, but must be put into the same order when assembled together again.
Re: Boomilever B/C
Posted: September 8th, 2020, 5:25 pm
by cool hand luke
any guesses what they meant by this one?
"The boomilever may not thrust back against the wall during loading"
doesn't a free body diagram show that's impossible?
Re: Boomilever B/C
Posted: September 9th, 2020, 11:49 am
by dholdgreve
My thoughts exactly... The very definition of a boomilever REQUIRES it to "thrust back against the wall." I assume they mean that it cannot thrust back to the wall directly behind the mounting hook, although I cannot for the life of me understand why anyone would want to do that, and what advantage it might gain them... It just seems like extra words added to already overly complicated event rules.
Re: Boomilever B/C
Posted: September 10th, 2020, 12:32 pm
by JonB
dholdgreve wrote: ↑September 9th, 2020, 11:49 am
My thoughts exactly... The very definition of a boomilever REQUIRES it to "thrust back against the wall." I assume they mean that it cannot thrust back to the wall directly behind the mounting hook, although I cannot for the life of me understand why anyone would want to do that, and what advantage it might gain them... It just seems like extra words added to already overly complicated event rules.
Yes, I also think you are correct in the assumption. I saw a design that did this years ago, but I cannot say it was superior to a design that does not.
Re: Boomilever B/C
Posted: September 17th, 2020, 5:20 am
by sneepity
cool hand luke wrote: ↑September 8th, 2020, 5:25 pm
any guesses what they meant by this one?
"The boomilever may not thrust back against the wall during loading"
doesn't a free body diagram show that's impossible?
Isn't that what compression is?
But I think they meant something like it cannot lean on the testing wall for support.
Re: Boomilever B/C
Posted: September 17th, 2020, 9:38 am
by Godspeed
sneepity wrote: ↑September 17th, 2020, 5:20 am
cool hand luke wrote: ↑September 8th, 2020, 5:25 pm
any guesses what they meant by this one?
"The boomilever may not thrust back against the wall during loading"
doesn't a free body diagram show that's impossible?
Isn't that what compression is?
But I think they meant something like it cannot lean on the testing wall for support.
Yeah, I think that rule might need to be better explained
Re: Boomilever B/C
Posted: September 17th, 2020, 10:02 am
by sneepity
Godspeed wrote: ↑September 17th, 2020, 9:38 am
sneepity wrote: ↑September 17th, 2020, 5:20 am
cool hand luke wrote: ↑September 8th, 2020, 5:25 pm
any guesses what they meant by this one?
"The boomilever may not thrust back against the wall during loading"
doesn't a free body diagram show that's impossible?
Isn't that what compression is?
But I think they meant something like it cannot lean on the testing wall for support.
Yeah, I think that rule might need to be better explained
of course it does, it's unclear as to whether it really means
i was looking through and apparently it meant that the boom has to be pulling at the hook? ofc it would tho
Re: Boomilever B/C
Posted: September 17th, 2020, 6:48 pm
by Godspeed
sneepity wrote: ↑September 17th, 2020, 10:02 am
Godspeed wrote: ↑September 17th, 2020, 9:38 am
sneepity wrote: ↑September 17th, 2020, 5:20 am
Isn't that what compression is?
But I think they meant something like it cannot lean on the testing wall for support.
Yeah, I think that rule might need to be better explained
of course it does, it's unclear as to whether it really means
i was looking through and apparently it meant that the boom has to be pulling at the hook? ofc it would tho
Unless the Boomilevers bottom part is longer than the top part, but then again if it were like that it would probably break instantly, but I don't quite know
Re: Boomilever B/C
Posted: September 18th, 2020, 4:36 am
by sneepity
Godspeed wrote: ↑September 17th, 2020, 6:48 pm
sneepity wrote: ↑September 17th, 2020, 10:02 am
Godspeed wrote: ↑September 17th, 2020, 9:38 am
Yeah, I think that rule might need to be better explained
of course it does, it's unclear as to whether it really means
i was looking through and apparently it meant that the boom has to be pulling at the hook? ofc it would tho
Unless the Boomilevers bottom part is longer than the top part, but then again if it were like that it would probably break instantly, but I don't quite know
hmm,isn't the compression longer than the tension? (or atleast when you measure it)?
edit:spelling mistakes