Boomilever B/C

Locked
Anonymous15
Member
Member
Posts: 58
Joined: January 14th, 2019, 7:55 pm
Has thanked: 9 times
Been thanked: 0

Re: Boomilever B/C

Post by Anonymous15 » January 31st, 2019, 1:40 pm


jinhusong
Member
Member
Posts: 167
Joined: March 16th, 2017, 3:34 pm
Division: C
State: CA
Location: Santa Clara
Has thanked: 0
Been thanked: 1 time

Re: Boomilever B/C

Post by jinhusong » January 31st, 2019, 2:52 pm

Hi,

Here I saw our students glue the tension to compression part first. They use template to make sure left side and right side are the same.

After that, they put left and right compression part together with Z bracing on both top and bottom.

Then with help of testing hook, align base with 2 tension sticks. The tension they use is 1/16 X 1/16 basswood.

They took advice from here that the base is only 7/8" (~2.2cm), not 5cm. Save a gram about.

Base to tension with groove and laminate.

Following photo is they were trying to align base to tension sticks. This is not a finished boomilever.
Image

idislikeboomi
Member
Member
Posts: 9
Joined: January 19th, 2019, 4:07 pm
Has thanked: 0
Been thanked: 0

Re: Boomilever B/C

Post by idislikeboomi » January 31st, 2019, 2:59 pm

how does that base usually work for you guys? We've been struggling to find a solid base design, the glue usually breaks off the tension members so we don't know how to make sure the connection is strong

jinhusong
Member
Member
Posts: 167
Joined: March 16th, 2017, 3:34 pm
Division: C
State: CA
Location: Santa Clara
Has thanked: 0
Been thanked: 1 time

Re: Boomilever B/C

Post by jinhusong » January 31st, 2019, 3:50 pm

With Gorilla Glue, groove base for the tension stick and laminate. So all 4 sides of the each tension are glued to the base.
Tested with 1/2" overlap of base and tension, holding 40 kg no problem.

Also heard you can put base (the same height as tension sticks) between the tensions then sandwich them. This can avoid grooving.

Try out with luggage scale to see how strong it is.

idislikeboomi
Member
Member
Posts: 9
Joined: January 19th, 2019, 4:07 pm
Has thanked: 0
Been thanked: 0

Re: Boomilever B/C

Post by idislikeboomi » January 31st, 2019, 3:53 pm

jinhusong wrote:With Gorilla Glue, groove base for the tension stick and laminate.
Is there a good guide for how to laminate for boomilevers? I'm new to the event and am not familiar with the process of lamination in this context.

embokim
Member
Member
Posts: 113
Joined: October 24th, 2013, 3:17 am
Division: C
State: NY
Location: between weird and genius
Has thanked: 0
Been thanked: 0

Re: Boomilever B/C

Post by embokim » January 31st, 2019, 4:08 pm

What score usually places at Division C regionals? Our regional places top 10.
Happy to be here

jinhusong
Member
Member
Posts: 167
Joined: March 16th, 2017, 3:34 pm
Division: C
State: CA
Location: Santa Clara
Has thanked: 0
Been thanked: 1 time

Re: Boomilever B/C

Post by jinhusong » January 31st, 2019, 9:23 pm

https://scioly.org/wiki/index.php/Aia%2 ... ever_Guide

Please read this if you are new to boomilever. Laminate is used to connect compression and tension together.

User avatar
MadCow2357
Exalted Member
Exalted Member
Posts: 771
Joined: November 19th, 2017, 9:09 am
Division: C
State: RI
Location: Stark Industries Internship
Has thanked: 153 times
Been thanked: 54 times
Contact:

Re: Boomilever B/C

Post by MadCow2357 » February 1st, 2019, 4:50 am

idislikeboomi wrote:
jinhusong wrote:With Gorilla Glue, groove base for the tension stick and laminate.
Is there a good guide for how to laminate for boomilevers? I'm new to the event and am not familiar with the process of lamination in this context.
At its simplest, it is just glueing.
MadCow2357's Userpage
2020 Events: Boomilever, Machines, Wright Stuff, and sadly not Gravity Vehicle
Gallagher MS '19
Barrington HS '23
Andrew Yang for VP!
In remembrance of Len Joeris (Balsa Man) and Dr. Gerard Putz - Don't cry because they are gone. Smile because they were here.

BilalHayat19
Member
Member
Posts: 8
Joined: October 15th, 2018, 4:33 pm
Has thanked: 0
Been thanked: 0

Boomilever B/C

Post by BilalHayat19 » February 1st, 2019, 4:55 am

Does anybody know boomilever designs people create at regionals, states, and nationals?

User avatar
TheSquaad
Member
Member
Posts: 164
Joined: March 18th, 2017, 5:14 pm
Division: Grad
Location: Somewhere over the rainbow
Has thanked: 0
Been thanked: 0

Re: Boomilever B/C

Post by TheSquaad » February 1st, 2019, 6:45 am

BilalHayat19 wrote:Does anybody know boomilever designs people create at regionals, states, and nationals?
At regionals, people make mostly bad ones. At nationals, people make mostly good ones.

Seriously though, there’s such a wide range of designs that it’s really hard to say anything really specific. Obviously higher tournaments will have cleaner designs and way fewer people getting tiered. We’ll have to wait and see though to find out what those refined designs look like.

Locked

Return to “Boomilever B/C”

Who is online

Users browsing this forum: No registered users and 1 guest