Search found 25 matches

by Azn
February 10th, 2019, 10:32 am
Forum: Boomilever B/C
Topic: Tube Boomilevers
Replies: 17
Views: 5164

Re: Tube Boomilevers

What did you use to keep the wood bent around the form to dry? I used small rubber bands at first, but these left an impression on the wood. An improved method I used was to actually wrap everything in a layer of tissue paper and secure it with masking tape (not exactly sure how I got this to work ...
by Azn
February 5th, 2019, 6:31 pm
Forum: Boomilever B/C
Topic: Tube Boomilevers
Replies: 17
Views: 5164

Re: Tube Boomilevers

I experimented a bit with the tube design when I was a senior back in 2014. I used a solid 'plug' for the distal end that was sanded down to fit inside the tube by ~1/4 inch. The tension members were attached to the plug, which also featured a hole for the loading block assembly. Initial testing of ...
by Azn
September 19th, 2018, 1:51 pm
Forum: Boomilever B/C
Topic: Might be useful
Replies: 1
Views: 1554

Might be useful

Boom was by far my favorite event when I competed back in 2013-2014, so during my senior year when I had to write a final paper on a research topic of my choosing it made sense to write about the booms I built for the previous year. Looking back at this paper now I realize it’s actually pretty poorl...
by Azn
October 9th, 2017, 7:53 pm
Forum: Towers B/C
Topic: Black Sand
Replies: 11
Views: 1683

Re: Black Sand

A few years back I asked the boom supervisor at Nats where to get the "black sand", you can find the stuff if you look up "blasting abrasive". https://www.amazon.com/Black-Diamond-Blasting-Abrasive-Misc/dp/B0000AXAUQ/ref=sr_1_1?s=hi&ie=UTF8&qid=1507603689&sr=1-1&keywords=Black+diamond+blasting+abras...
by Azn
April 29th, 2015, 7:00 am
Forum: Bridge Building B/C
Topic: Scores B/C
Replies: 207
Views: 41149

Re: Scores B/C

Whoa! The guesses are 4000+ for first? :o How many get places at Nats again? Probably 3500+ for any medaling... Gosh my team needs to step up! I personally haven't heard of any scores 4000+, I know that 2 schools that aren't going to nats in socal had scores that were 3400+. I think 3500+ is enough...
by Azn
April 14th, 2015, 12:04 am
Forum: 2015 Nationals
Topic: Unofficial Rankings: Div. C
Replies: 79
Views: 21914

Re: Unofficial Rankings: Div. C

Hahahaha oops ...
by Azn
April 11th, 2015, 6:54 pm
Forum: 2015 Nationals
Topic: Unofficial Rankings: Div. C
Replies: 79
Views: 21914

Re: Unofficial Rankings: Div. C

My top 5 are 1) Irvine High 2) Canyon Crest Academy 3) Mounds Gu 4) Penncrest 5) Troy I think Troy will do pretty well in Bridge Building which will help them get 1st. I would have to disagree (not that Troy won't do well in bridges, i'm sure they will, but I don't think this will help anyone win o...
by Azn
March 22nd, 2015, 2:08 pm
Forum: Bridge Building B/C
Topic: Designs B/C
Replies: 200
Views: 37171

Re: Designs B/C

Obviously everyone is entitled to their own opinion, and a great thing about an event like bridges is that there isn't one single sure-fire way to succeed. When it comes to pre-testing, i've always been against it, believing that even testing to just 50% would compromise the efficiency of the device...
by Azn
March 4th, 2015, 8:51 am
Forum: Bridge Building B/C
Topic: Designs B/C
Replies: 200
Views: 37171

Re: Designs B/C

Is this glue issue or just the thickness of the wood? http://i.imgur.com/z2lBI5G.jpg That was the only place that broke at 10kg mark. Seems like a lot of pressure was centered there. I'm retesting it w/ thicker wood but there may be variable since it may have become weakened (nothing broke except a...
by Azn
September 7th, 2014, 1:46 pm
Forum: Bridge Building B/C
Topic: Sand Loading Device
Replies: 21
Views: 7353

Re: Sand Loading Device

Yup those are mine. I would be more than happy to help anyone who wants to try and build a hopper :D

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