Boomilever B/C

sjwon3789
Member
Member
Posts: 107
Joined: December 31st, 2012, 3:45 pm
Division: C
State: VA
Location: Virginia

Re: Boomilever B/C

Postby sjwon3789 » April 29th, 2013, 2:00 pm

My state is over and this year is over for me. For this type of event, will there be any rule changes? (I'll be in division C. Would it most likely stay the same; 15cm as height?)
2013 Events: Boomilever, Keep the Heat, WIDI
2014 Events: Boomilever, Geologic Mapping, Mission Possible, Scrambler
2015 Events: Air Trajectory, Bridge Building, Mission Possible

chalker
Member
Member
Posts: 2089
Joined: January 9th, 2009, 7:30 pm
Division: Grad
State: OH

Re: Boomilever B/C

Postby chalker » April 29th, 2013, 3:20 pm

My state is over and this year is over for me. For this type of event, will there be any rule changes? (I'll be in division C. Would it most likely stay the same; 15cm as height?)

Yes, we typically change the parameters of the construction events from year to year. Not sure yet what we'll do with Boomilever though.

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair

User avatar
Unbihexium
Member
Member
Posts: 31
Joined: May 21st, 2012, 4:01 pm
Division: C
State: NY
Location: Pegasus Dwarf Irregular Galaxy, also: The Matrix.

Re: Boomilever B/C

Postby Unbihexium » April 29th, 2013, 3:24 pm

My state is over and this year is over for me. For this type of event, will there be any rule changes? (I'll be in division C. Would it most likely stay the same; 15cm as height?)

Yes, we typically change the parameters of the construction events from year to year. Not sure yet what we'll do with Boomilever though.
Are there any known possibilities? It seems like making it less than 15 cm would make it impossible to hold full 15 kg, as well as length manipulation... Is something like what happened with towers, where a scoring system encompassed dimensions likely?
2012 Regionals: 5th Towers
2013 Athens Twin Tiers Invites: 1st Boomilever, 1st Fermi, 3rd Circuit Lab
2013 Regionals: 1st Boomilever, 1st Fermi, 1st Circuit Lab
2013 New York States: 3rd Fermi, 3rd Circuit Lab

elispa
Member
Member
Posts: 2
Joined: August 9th, 2013, 10:32 am
Division: C
State: OH

Re: Boomilever B/C

Postby elispa » August 9th, 2013, 10:42 am

Sorry from deviating from the original topic but what's the best place to get wood from online?

User avatar
Unbihexium
Member
Member
Posts: 31
Joined: May 21st, 2012, 4:01 pm
Division: C
State: NY
Location: Pegasus Dwarf Irregular Galaxy, also: The Matrix.

Re: Boomilever B/C

Postby Unbihexium » August 9th, 2013, 11:07 am

Sorry from deviating from the original topic but what's the best place to get wood from online?

In terms of quality the best place to buy wood would be Specialized Balsa. (http://www.specializedbalsa.com/) In terms of price it's most effective to buy in sheets and use a balsa stripper to cut the size you need. If you're looking for something cheaper, places like pitsco and kelvin and balsawoodinc have less careful selection and generally do not allow you to choose densities, but will be significantly cheaper. Buying in sheets is by far the best in terms of cost and consistency as sheets are more self consistent than strips.
2012 Regionals: 5th Towers
2013 Athens Twin Tiers Invites: 1st Boomilever, 1st Fermi, 3rd Circuit Lab
2013 Regionals: 1st Boomilever, 1st Fermi, 1st Circuit Lab
2013 New York States: 3rd Fermi, 3rd Circuit Lab

User avatar
balsa
Exalted Member
Exalted Member
Posts: 22
Joined: April 17th, 2013, 8:12 pm
Division: Grad
State: CA
Location: Troy, Room 901
Contact:

Re: Boomilever B/C

Postby balsa » August 9th, 2013, 11:14 am

My state is over and this year is over for me. For this type of event, will there be any rule changes? (I'll be in division C. Would it most likely stay the same; 15cm as height?)

Yes, we typically change the parameters of the construction events from year to year. Not sure yet what we'll do with Boomilever though.
Are there any known possibilities? It seems like making it less than 15 cm would make it impossible to hold full 15 kg, as well as length manipulation... Is something like what happened with towers, where a scoring system encompassed dimensions likely?
I don't think they will make it less than 15cm. Maybe lengthening the boom length itself, some other changes perhaps.
Image
Troy HS Science Olympiad
2015 Events: Protein Modeling, Geologic Mapping, Entomology

User avatar
Unbihexium
Member
Member
Posts: 31
Joined: May 21st, 2012, 4:01 pm
Division: C
State: NY
Location: Pegasus Dwarf Irregular Galaxy, also: The Matrix.

Re: Boomilever B/C

Postby Unbihexium » August 9th, 2013, 11:19 am



Yes, we typically change the parameters of the construction events from year to year. Not sure yet what we'll do with Boomilever though.
Are there any known possibilities? It seems like making it less than 15 cm would make it impossible to hold full 15 kg, as well as length manipulation... Is something like what happened with towers, where a scoring system encompassed dimensions likely?
I don't think they will make it less than 15cm. Maybe lengthening the boom length itself, some other changes perhaps.
Either way the whole issue with that is that any manipulation of the distal angle might make any sort of efficiency near 2000 impossible as it was nearly so this year. 15 cm was already pushing it. Maybe they'll change it to be like towers with the scoring system counting the dimensions...
2012 Regionals: 5th Towers
2013 Athens Twin Tiers Invites: 1st Boomilever, 1st Fermi, 3rd Circuit Lab
2013 Regionals: 1st Boomilever, 1st Fermi, 1st Circuit Lab
2013 New York States: 3rd Fermi, 3rd Circuit Lab

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

Re: Boomilever B/C

Postby fanjiatian » August 13th, 2013, 6:51 am

I'm trying to justify a design that tapers from the base to the distal end
I don't see any benefits: wouldn't there be more net force + shear on the compression members? They'd have to be longer since it gets narrower towards the distal end

Would it create more stability near the loading block?

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 13th, 2013, 1:52 pm

Could you elaborate on the tarpered part? Is it a compression boom with a tapered compression member? Or some other design.
'If you're the smartest person in the room, you're in the wrong room' - Unknown

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

Re: Boomilever B/C

Postby fanjiatian » August 14th, 2013, 3:31 pm

Sorry for not being clear!
So if the compression members are 5 cm apart when they touch the testing wall, then the compression members will be less than 5 cm apart where the loading block goes.
If you looked at the boomilever from an aerial view, the compression members would look more like a trapezoid or triangle instead of a rectangle.


Return to “Boomilever B/C”

Who is online

Users browsing this forum: No registered users and 0 guests