Knex Rocket

by Electroinnovation

3.7K016

Intro: Knex Rocket

This is a Knex Rocket I built and it shoots about 30 feet up. Do not ask me to publish this instructable because I already took it apart. Please rate and comment. Credit for the Trigger goes to THE REAPER.

15 Comments

Oblivitus 15 years ago

Doesn't it damage the pieces when fired up?

Oblivitus 15 years ago

Try making the rocket denser and smoother around the edges, that will stabilize the structure and prevent fractures. Also try Duct tape on that red rod.

Speedmite 15 years ago

Denser=Heavyer=less height.

Lauch it at an angle so it doesnt land on the stick.

Oblivitus 15 years ago

More mass can actually improve range depending on how much tension the design can hold.

Speedmite 15 years ago

Its knex. Any thing that holds too much strain collapses something.

Oblivitus 15 years ago

True, but you did not refute my last comment.

Speedmite 15 years ago

I did. I highlight the"depending on how much tension the design can hold." part. With this design, It seems that the light weight of the rocket thing is Ideal for launching. And I just did a science experiment on which projectiles went farther when shot from a potato cannon, and I weighed all the projectiles, and the lightest ones went the farthest.

NINJAboyofwisdom 14 years ago

 Generally, if fired vertically, lighter always wins...

shieldsam 13 years ago

lighter = less mass, and less mass = more wind resistance. its why you can't throw a feather.

shieldsam 13 years ago

its all about momentum. thats why you can throw say a 500g rock farther than a 200g rock .