Search found 582 matches

by dholdgreve
April 12th, 2022, 10:08 am
Forum: Bridge B/C
Topic: Bridge B/C
Replies: 129
Views: 153022

Re: Bridge B/C

This forum is pretty dead so I thought I would enliven it with some hot silica talk. So my kid had a bridge that he pre-tested and it held the whole weight. He put it in silica night before State tourney and it dropped a further .18 grams. Tested in on camera for the remote tourney and it broke hol...
by dholdgreve
April 12th, 2022, 10:07 am
Forum: Bridge B/C
Topic: Bridge B/C
Replies: 129
Views: 153022

Re: Bridge B/C

This forum is pretty dead so I thought I would enliven it with some hot silica talk. So my kid had a bridge that he pre-tested and it held the whole weight. He put it in silica night before State tourney and it dropped a further .18 grams. Tested in on camera for the remote tourney and it broke hol...
by dholdgreve
March 16th, 2022, 7:51 am
Forum: 2022 Invitationals
Topic: National Invitational 2022
Replies: 9
Views: 8121

Re: National Invitational 2022

Just Curious... Has ANYONE received the tests, answer keys or awards from this Invitational? Thanks
by dholdgreve
December 8th, 2021, 8:36 am
Forum: Bridge B/C
Topic: National Invitational Tournament Rules
Replies: 4
Views: 2471

Re: National Invitational Tournament Rules

Thanks Chuck,
I'm not sure I support that avenue... What if a kid has a REALLY great bridge for December 18th, but can't duplicate it on the 8th? Seems like maybe those that get to the second round should be ranked above all others, no matter how they do on the 8th.
by dholdgreve
December 7th, 2021, 5:50 am
Forum: Bridge B/C
Topic: National Invitational Tournament Rules
Replies: 4
Views: 2471

National Invitational Tournament Rules

Is anyone else a little perplexed by the National Invitational Rules for Bridges? If I understand this correctly, the kids are to test their structure prior to December 18th, and submit a video showing the testing as well as the controls used, scoring, and logs, and submit the entire packet via goog...
by dholdgreve
September 9th, 2021, 5:29 am
Forum: Bridge B/C
Topic: Bridge B/C
Replies: 129
Views: 153022

Re: Bridge B/C

I have two questions about the Rule 3-c-ii & 3-d-ii, hopefully someone can help out. 1. Does it mean the object block would sit on the supporting bar before starting passing through the bridge? 2. According to the rule, the object passes through the bridge horizontally from one end of the bridg...
by dholdgreve
September 8th, 2021, 7:05 am
Forum: Bridge B/C
Topic: Bridge B/C
Replies: 129
Views: 153022

Re: Bridge B/C

Many years ago (over 20) the bridge competition required an actual road bed be run through the bridge, the one end of the bridge to be placed on the loading block so it sloped, then a hot wheels or matchbox car of the student's choosing be allowed to run from one end to the other. The student got 3 ...
by dholdgreve
September 18th, 2020, 12:36 pm
Forum: Boomilever B/C
Topic: Boomilever B/C
Replies: 76
Views: 29657

Re: Boomilever B/C

It all depends... if tension rods are longer than compression beams, and the rods are therefore on top, it has been called a tension boom. If the pieces that extend from the hook go out at 90 degrees to the testing wall, and are supported through longer angled compression beams beneath them, that ty...
by dholdgreve
September 9th, 2020, 11:49 am
Forum: Boomilever B/C
Topic: Boomilever B/C
Replies: 76
Views: 29657

Re: Boomilever B/C

My thoughts exactly... The very definition of a boomilever REQUIRES it to "thrust back against the wall." I assume they mean that it cannot thrust back to the wall directly behind the mounting hook, although I cannot for the life of me understand why anyone would want to do that, and what ...
by dholdgreve
July 21st, 2020, 7:20 am
Forum: Ping Pong Parachute B/C
Topic: Size Clarification
Replies: 8
Views: 5373

Re: Size Clarification

Is there a limit to the size of the parachute? If not would bigger be better? Also, is there a limit to the size of the fins? Thanks. I know this seems counter-intuitive, but experiment with a small hole in the center of the chute. Yes, it may speed up the decent, but it may help get your chute ope...

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