PICTURES, SCORES, VIDEOS!!!

M017
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Re: PICTURES, SCORES, VIDEOS!!!

Postby M017 » Thu Mar 29, 2018 4:01 am

cheese wrote:
Raleway wrote:
M017 wrote:This is completely mathematical, but I found a tower design that is possible 4000 score with bonus, using Balsa Man's formulas for BS and interval length :D


Congrats! You've spent time on the right side of the tower world but applying reality to theory is... difficult. I had a theoretical 4389 tower that scored 1600... you can imagine my disappointment. But having those mathematical parts figured out allowed me to continually increase my score. Best of luck!

Yeah, the sad thing about my towers is that my math is always around 500 better than I end up getting lol.

That makes sense because the math is saying everything is absolutely perfect
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cheese
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Re: PICTURES, SCORES, VIDEOS!!!

Postby cheese » Thu Mar 29, 2018 4:40 am

M017 wrote:
cheese wrote:
Raleway wrote:
Congrats! You've spent time on the right side of the tower world but applying reality to theory is... difficult. I had a theoretical 4389 tower that scored 1600... you can imagine my disappointment. But having those mathematical parts figured out allowed me to continually increase my score. Best of luck!

Yeah, the sad thing about my towers is that my math is always around 500 better than I end up getting lol.

That makes sense because the math is saying everything is absolutely perfect

Yeah, and of course my towers aren't perfect!
I usually math out for a 2700-3200 score tower, been averaging low 2000's
BuildingFriend wrote:"Towers is basically a love affair- be ready to destroy your hard work of hours in a matter of minutes."

2018 Nationals: 2nd Place Mystery Architecture || 6th Place Battery Buggy
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Re: PICTURES, SCORES, VIDEOS!!!

Postby MadCow2357 » Sat Mar 31, 2018 1:27 pm

1st tower - 16.5 grams, 6.5 kg + 5 kg = 696.6

2nd tower - 13 grams, held 10.8 kg + 5kg = 1215.3

3rd tower - 20.2 grams, held 15 kg + 5 kg = 990

The first tower was square base, built it in 2 parts and it broke in the middle. First ever tower.

Second was rectangular (29*5 cm), two sides laced together on cruddy jig. Enough to medal at states (RI is not competitive at all.)

Third was also rectangular (29*5 cm), same building method. Used all high density Balsa wood, hoped to hold all 15 kg. It did, and is still intact. Is now backup tower.

I'm kind of a rookie compared to you elite people, but these are still some disappointing scores.
2017-2018 Events: Battery Buggy, Mystery Architecture, and Towers
Likely 2018-2019 Events: Battery Buggy, Boomilever, Thermodynamics

In remembrance of Balsa Man/Len Joeris, who always acted for the betterment of science. :cry:

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Re: PICTURES, SCORES, VIDEOS!!!

Postby cheese » Sat Mar 31, 2018 4:34 pm

Remember, it is not all about holding all 15. If you have a 15g that holds everything, it could be worse than a 4 gram tower with bonus holding almost nothing.
BuildingFriend wrote:"Towers is basically a love affair- be ready to destroy your hard work of hours in a matter of minutes."

2018 Nationals: 2nd Place Mystery Architecture || 6th Place Battery Buggy
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Re: PICTURES, SCORES, VIDEOS!!!

Postby DarthBuilder » Mon Apr 09, 2018 11:23 pm

Any score reports from any state competitions?
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Re: PICTURES, SCORES, VIDEOS!!!

Postby sciolycats » Mon Apr 09, 2018 11:47 pm

dholdgreve wrote:
M017 wrote:Does anyone have any basic design tips? I'm using bracing type P1 from the Wikipedia, consistently getting scores of ~1400 but, of course, I would like to be around 2,000. 3 sets on the top half and 3 on the bottom half.

Double the bracing and reduce the column weight.


By column weight, do you mean the thicker, usually 1/8x1/8 structural pieces? If so, how do you suggest reducing the column weight? (shortening the columns is not an option because of the height minimum)

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Re: PICTURES, SCORES, VIDEOS!!!

Postby dholdgreve » Tue Apr 10, 2018 1:05 pm

sciolycats wrote:
dholdgreve wrote:
M017 wrote:Does anyone have any basic design tips? I'm using bracing type P1 from the Wikipedia, consistently getting scores of ~1400 but, of course, I would like to be around 2,000. 3 sets on the top half and 3 on the bottom half.

Double the bracing and reduce the column weight.


By column weight, do you mean the thicker, usually 1/8x1/8 structural pieces? If so, how do you suggest reducing the column weight? (shortening the columns is not an option because of the height minimum)

We've bought 1/8" x 1/8" balsa in both 36" and 48" lengths. The first thing we do when an order comes in is to cut the balsa into 12" lengths... We can do this, because we are Div B, and both top and bottom columns can be created from 12" blanks. We then go through and weigh each piece and sort them. 12" balsa blanks can weigh anywhere from .19 grams to well over 3 grams each. Same size, different weights. Next, we will determine the general weight of the columns we want to use, then do the Single Finger Push Down test on each piece. We don't do the SFPD test until the stock is cut into 12" blocks because we want the results to be specific to that piece of material... not the 2 or 3 adjacent pieces. If you find pieces that have a SFPD of 300 grams, you may be able to design a tower with only 3 or 4 tiers of bracing. If you find pieces that have a SFPD test of 200 grams, you may want to up to 8 tiers of bracing. Logically, as you add tiers of bracing, the distance between connections (nodes) is reduced. The more bracing tiers, the less "unsupported column length" there is between nodes.

The whole trick to this competition is to find the most efficient combination of column density and the number of tiers of bracing it takes to support them. This takes hours and hours of testing, and several dozen towers built with very carefully documented material used and results. Sure... you might get lucky... but can you repeat it?
Dan Holdgreve
Northmont Science Olympiad

Dedicated to the Memory of Len Joeris
"For the betterment of Science"

emilyshangg
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Re: PICTURES, SCORES, VIDEOS!!!

Postby emilyshangg » Sun Apr 15, 2018 11:33 pm

Hey, I saw a few people talk about a formula that can calculate your score that Balsa Man (may he rest in peace) posted or mentioned? I've gone through the forum and can't seem to find it...
Thanks!

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Re: PICTURES, SCORES, VIDEOS!!!

Postby StormTJ » Tue Apr 17, 2018 1:24 am

Any predictions for a placing score at nationals in division C?

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Re: PICTURES, SCORES, VIDEOS!!!

Postby jinhusong » Tue Apr 17, 2018 1:44 am

emilyshangg wrote:Hey, I saw a few people talk about a formula that can calculate your score that Balsa Man (may he rest in peace) posted or mentioned? I've gone through the forum and can't seem to find it...
Thanks!


The score is simple, just the (weight the tower can hold + bonus if any) / weight of tower.

Maybe you are talking about the spreadsheet about leg strength and intervals for all X bracing?

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Re: PICTURES, SCORES, VIDEOS!!!

Postby jinhusong » Tue Apr 17, 2018 5:05 am


emilyshangg
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Re: PICTURES, SCORES, VIDEOS!!!

Postby emilyshangg » Tue Apr 17, 2018 6:57 pm


Yes, that's exactly what I was looking for. Thank you so much!

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Re: PICTURES, SCORES, VIDEOS!!!

Postby jinhusong » Tue Apr 17, 2018 11:25 pm

emilyshangg wrote:

Yes, that's exactly what I was looking for. Thank you so much!


Just as a reference, my son and his partner built a square based bonus tower:
Base: strong leg, BS ~48 at 36 inch with 5 interval, all X bracing (bottom 2: 3/32X1/32 strips from 10g sheet, next 2 1/16X1/32 strips from 8g sheet, top one 1/16X1/32 from 6g sheet. The sheet is 1/32X3X36).

Chimney: light leg, BS ~20 at 36 inch with 9 interval, all X bracing ( 1/16X1/32 strip from 6g sheet)

Total weight 8.06g, holding 13kg, got first place in Northern California State. I was not there, but my son told me the table was not leveled. It was designed for 15kg.

I thought they may be able to get a medal, but they got first place.

Hope these information can help you.

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Re: PICTURES, SCORES, VIDEOS!!!

Postby JVallurup47 » Thu Apr 19, 2018 5:49 pm

Does anyone know the winning tower scores from the state tournaments?

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Re: PICTURES, SCORES, VIDEOS!!!

Postby Unome » Thu Apr 19, 2018 7:16 pm

JVallurup47 wrote:Does anyone know the winning tower scores from the state tournaments?

High.

For Missouri specifically, over 2000 should be an easy first or second in either division. Over 1400 should place you in the top 5 pretty easily.
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