Friday, January 2, 2009

Lego Rocket!

As any regular readers know, I will build rockets out of anything - scrap balsa, pens, nose cone parts, empty engine casings, posterboard, even easter eggs. Now, I have made an entire 18mm / 24mm rocket out of legos, save the shock cord and chute. A three-stud-wide space will comfortably hold a 24mm casing, which can fit an 18mm motor inside. The rocket is 5 studs (~1.6") wide by 27 studs - about 10 inches - tall. It weighs about half a pound, so it'll need a C or D motor. I'll try a C6-3.
A few challenges:
  • Engine block - a few 2x2 bricks that partially block the tube. Simple and effective.

  • Motor retention: not needed. The 24mm engine fits very tightly in the tube.

  • Fins: 1 stud wide, held on with 2 1x8 bricks. They use sloped pieces for looks and aerodynamics.

  • Launch lugs: Technic pieces attached with the funny blue pins.

  • Shock cord attachment: tied thru 1x4 technic block (also holds upper launch lug) and tied thru hole in 2x2 cylinder to attach to the nose cone not quite so blunt end.

2 comments:

Dick said...

Whaaaaat, no photos?

The EGE said...

They're coming.