Search found 168 matches

by DoctaDave
March 11th, 2016, 6:46 pm
Forum: Air Trajectory B/C
Topic: Optimal Precision and Consistency
Replies: 5
Views: 1869

Re: Optimal Precision and Consistency

I think +/- 2 cm precision with parts from home depot is more than doable. As long as you use the right materials and test enough that should be pretty easy. +/- 2cm would be the dream. Last year's winning score at nationals was off by 14cm on one shot IIRC. I think +/-2 cm is easily doable for sho...
by DoctaDave
January 25th, 2016, 11:21 pm
Forum: Wright Stuff C
Topic: Plane Won't Climb Upwards?
Replies: 11
Views: 5902

Re: Plane Won't Climb Upwards?

300 turns is just not enough. You're probably on the very low part of the torque curve. Try 700 and see what happens. I would advise not to use 1/8" rubber and to trim your prop the next time you test. I don't even use that thick of rubber when I go for the dime bonus. Something like .08-0.087" rubb...
by DoctaDave
January 21st, 2016, 7:40 pm
Forum: Bridge Building B/C
Topic: Scores
Replies: 63
Views: 17560

Re: Scores

Ripplestar wrote:We've had two people in one invintational break 3000.
Was it division B?

Either way, its a great score.
by DoctaDave
January 20th, 2016, 6:38 pm
Forum: Air Trajectory B/C
Topic: Rules contradiction?
Replies: 22
Views: 5138

Re: Rules contradiction?

That is not a contradiction but rather an engineering "challenge" imposed by the rules. You must design your device to be smaller than 80x80 cm so that it will still be able to rotate 45 degrees. It isn't completely necessary to turn the device 45 degrees though, unless you are trying to hit some ve...
by DoctaDave
January 19th, 2016, 1:59 pm
Forum: Air Trajectory B/C
Topic: Lasers
Replies: 15
Views: 4321

Re: Lasers

With the elevation adjustment, you can change the angle that the laser points to the ground so the laser points exactly on the target even if its on the ground. The elevation adjustment is just turning a small hex screw so its quick to adjust. I have found that the elevation adjustment on my laser i...
by DoctaDave
January 18th, 2016, 5:56 pm
Forum: Air Trajectory B/C
Topic: Air Trajectory B/C
Replies: 287
Views: 44765

Re: Air Trajectory B/C

Has anyone found that racquetballs are not quite 2.25"? The ones that I just bought are noticeably smaller (2.18") which leaves a pretty big gap between the acrylic tube I have.
by DoctaDave
January 18th, 2016, 5:55 pm
Forum: Air Trajectory B/C
Topic: Lasers
Replies: 15
Views: 4321

Re: Lasers

Mounting a laser is very easy. Just use some picatinny rails which can be bought for very cheap. They can also be calibrated very easily with the wind and elevation adjustments provided on most lasers. The two main advantages of using a laser are consistency and speed. Aiming is as simple as flippin...
by DoctaDave
January 14th, 2016, 9:46 pm
Forum: Air Trajectory B/C
Topic: Graphs
Replies: 12
Views: 3843

Re: Graphs

bernard wrote:Dropping the graph template I made and used last season in case anyone wants to use it.
It was very helpful for my recent invite!

Thanks!
by DoctaDave
January 13th, 2016, 4:41 pm
Forum: Bridge Building B/C
Topic: Bridge Building 2016
Replies: 130
Views: 39153

Re: Bridge Building 2016

Hi my name is Frank Herman and I am competing in Science Olympiad Bridge building. I am having a hard time building bridges. If you guys have any useful tips or tricks, and or bridge designs, It would be much appreciated if you would share them. Thanks, Frank Read through the entire Bridge building...
by DoctaDave
January 13th, 2016, 2:17 pm
Forum: Bridge Building B/C
Topic: Scores
Replies: 63
Views: 17560

Re: Scores

Mira Loma invite's winning score for C was in the high 1900. A little disappointing considering the winning score last year was over 2600...

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