Scioly.org

Any feedback on our boomilever wood sizes?. We're thinking to use 1/8 for the main members and then 3/32 for the bracing. Will it be sturdy enough? We're using a compression boomilever.

If not, what wood should we buy? We are only using balsa right now but we could buy bass wood if it would help.

In division C, by the way.

MadCow2357 wrote:

PM2017 wrote:

DarthBuilder wrote:If you guys thought 3 minutes of sand loading is bad today at UChicago was 15 minutes for full load!

Rip stick-holders' knees.

Yes, big oof... Question: why didn't the Event Supervisors stop the teams from continuing to load?

Oh, the stick-holder wasn't nearly in as much pain as the person pushing down on the bootleg lever to release the sand at a rate of 1kg per minute...
Also sucked for our cameraman as he had to get a good angle to get us a 52 min slow-mo video after recording for 10 minutes straight.
Oh, also my boom held 10kg so my hands are still sore from holding down that lever for 10 minutes straight...

parikhy wrote:Any feedback on our boomilever wood sizes?. We're thinking to use 1/8 for the main members and then 3/32 for the bracing. Will it be sturdy enough? We're using a compression boomilever.

If not, what wood should we buy? We are only using balsa right now but we could buy bass wood if it would help.

In division C, by the way.

It all depends on bracing, but in normal cases 1/8 square is definitely not enough. At least 1/4" by 1/8" is needed for the main compression beams. I wouldn't go over 1/16" square for bracing.

MadCow2357 wrote:

parikhy wrote:Any feedback on our boomilever wood sizes?. We're thinking to use 1/8 for the main members and then 3/32 for the bracing. Will it be sturdy enough? We're using a compression boomilever.

If not, what wood should we buy? We are only using balsa right now but we could buy bass wood if it would help.

In division C, by the way.

It all depends on bracing, but in normal cases 1/8 square is definitely not enough. At least 1/4" by 1/8" is needed for the main compression beams. I wouldn't go over 1/16" square for bracing.

Depends on design. If you are only using 2 main compression sticks, 1/8" is not enough. However for box designs (4 sticks), it is sufficient.

Is there a rule against a Boomilever being tiered due to it being over 45cm?????? I received a tier for this yet as I review the construction parameters there is no such rule! Only Section 3 Subsection C states "The Boomilever must support the Loading Assembly (5.b.) at the loading point which must be between 40 cm and 45 cm from the testing wall (4.Part II.e.ii.)." but my Boomilever was in compliance with this rule! Am I missing something!! Please help!

TheChiScientist wrote:Is there a rule against a Boomilever being tiered due to it being over 45cm?????? I received a tier for this yet as I review the construction parameters there is no such rule! Only Section 3 Subsection C states "The Boomilever must support the Loading Assembly (5.b.) at the loading point which must be between 40 cm and 45 cm from the testing wall (4.Part II.e.ii.)." but my Boomilever was in compliance with this rule! Am I missing something!! Please help!

As far as I am aware there is no such rule that prohibits that.

TheChiScientist wrote:Is there a rule against a Boomilever being tiered due to it being over 45cm?????? I received a tier for this yet as I review the construction parameters there is no such rule! Only Section 3 Subsection C states "The Boomilever must support the Loading Assembly (5.b.) at the loading point which must be between 40 cm and 45 cm from the testing wall (4.Part II.e.ii.)." but my Boomilever was in compliance with this rule! Am I missing something!! Please help!

If it's over 45cm, then its not betwen 40 and 45, so yes, you can get tiered.

sciolyperson1 wrote:

TheChiScientist wrote:Is there a rule against a Boomilever being tiered due to it being over 45cm?????? I received a tier for this yet as I review the construction parameters there is no such rule! Only Section 3 Subsection C states "The Boomilever must support the Loading Assembly (5.b.) at the loading point which must be between 40 cm and 45 cm from the testing wall (4.Part II.e.ii.)." but my Boomilever was in compliance with this rule! Am I missing something!! Please help!

If it's over 45cm, then its not betwen 40 and 45, so yes, you can get tiered.

My construction was set up so that my boom was 46cm long but I placed my cross wood where the loading block would rest at exactly 40cm-45cm! It's not made with the traditional wood placement at exactly the end of the boomilever. Thus a tier should not occur! Correct??

TheChiScientist wrote:Is there a rule against a Boomilever being tiered due to it being over 45cm?????? I received a tier for this yet as I review the construction parameters there is no such rule! Only Section 3 Subsection C states "The Boomilever must support the Loading Assembly (5.b.) at the loading point which must be between 40 cm and 45 cm from the testing wall (4.Part II.e.ii.)." but my Boomilever was in compliance with this rule! Am I missing something!! Please help!

No such rule, what in the world happened?

TheChiScientist wrote:Is there a rule against a Boomilever being tiered due to it being over 45cm?????? I received a tier for this yet as I review the construction parameters there is no such rule! Only Section 3 Subsection C states "The Boomilever must support the Loading Assembly (5.b.) at the loading point which must be between 40 cm and 45 cm from the testing wall (4.Part II.e.ii.)." but my Boomilever was in compliance with this rule! Am I missing something!! Please help!

Pretty sure that as long as the center of the loading block is within 40 to 45cm you should be good. If your boomi goes over 45cm but has the center of loading block within the range, you should not get tiered.