Trajectory B/C

[Jim_R]

Table of Contents:

• Trajectory Wiki
• Practice vs. Device debate
• Weight Post #1
• Clarification of powered by Non-metallic elastic solid
• Device design process by fleet130
• Calibration Charts
• Projectiles and Drag
• Possible Triggering Device
• Weight Disscussion

Original post:

Code: Select all

How much time did you spend on this event last year? We wound up working on it almost every day for 2 months before regionals and a bit less for states.

[starpug]

3 hours on weekends and 2 1/2 hours almost everyday in the 2 months before states (in May)

[fleet130]

Trajectory

[rocketman1555]

i'm thinking about doing trajectory next year? does anyone from Div B have any ideas about how the device should work, like a catapult or slingshot, or any tips on how to build one

[starpug]

Well I personally am still milling over this but a thing to take into account is that rubber expands when heated so although rubber tubing sounds like a good idea it has it's drawbacks if left out in the sun.

[rocketman1555]

which stinks here, because its always hot, i was thinking about asking the div b team in my area for their design, and then tweaking it to make it better

[starpug]

Well here's what the key is consistency the top 5 teams at nationals this year hit both pins but the top team hit both pins twice in the same spot. Number 2 you might like a device to help you aim. Number 3 the more options the better. That's all for now.

[Pleiades]

My teams trajectory design was basically two pieces of wood with rubber tubing between them. It worked quite well.

[rocketman1555]

so it was similar to one of those things u would set up to throw water balloons out of, kinda like a slingshot

[Pleiades]

Yes, exactly like a slingshot, only bigger.

EDIT/ I believe I have a picture of the trajectory team using the catapult at states in my coaches classroom. I'll get it tomorrow and post the picture.