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How to make bottle rocket

Category: Flying things

How to make bottle rocket

Bottle rocket

difficultyDifficulty: ★★★☆☆

timeTime: One day

ScrapFrom scrap: ████████░░ 80%


PreamblePreamble

Probably everyone at least once in his life made a water bottle rocket. In this topic I want to introduce you to a rocket of three-liter bottles (!) and has a parachute system onboard.


MaterialsMaterials

  • Bottles
  • Threaded plastic tube
  • Plywood
  • Parachute
  • Can
  • Spring
  • An electric motor
ToolsTools

  • Hacksaw
  • Glue
  • Screwdriver
  • Screws
  • Scissors

    Homemade bottle rocket


  • Step 1

    Two bottles are connected neck-to-neck by a plastic tube (used gas canister). That is the whole bottle rocket is a cylinder, the nose cone is made out of the bottle. Stabilizers - plywood.

  • Step 2

    The second and third bottle connected bottom-to-bottom with threaded tube and two nuts.
    All joints carefully gloued and surrounded by a piece of bottle for streamlining

  • Step 3

    Stabilizers (tail) are made of plywood.
    How to make bottle rocket

  • Step 4

    Nozzle is not a bottle's neck, because it is too big. Nozzle will be a hole in bottle's cap.
    How to make bottle rocket

  • Step 5

    Launch pad is made of particleboard and two metal corners. Homemade bottle rocket is holded by metal bracket on the neck. Pull this bracket by a rope and rocket will start.
    How to make bottle rocket

    How to make bottle rocket

    How to make bottle rocket

  • Parachute system


  • Step 6

    Folded parachute
    How to make bottle rocket

  • Step 7

    Parachute compartment is made of tin. Parachute spring plunger is pushed through the door that is opened by a mechanical timer. In the photo through the open door you can see plunger on the spring
    How to make bottle rocket

  • How it works

    Parachute door is closed on latch
    How to make bottle rocket

    I open the latch, the spring pushes the folded parachute through the door. Then the parachute opens and performs its function.
    How to make bottle rocket

    Parachute timer


  • Step 8

    It consistes of a battery and motor with a gearbox. After starting the jet, engine starts to wind thread on the output shaft of the gearbox. A string pulls the parachute compartment door latch, it opens and parachute pushes out and homemade bottle rocket safely lands to the ground.
    Gear wheels are cut by hand with a file.
    How to make bottle rocket

    How to make bottle rocket

    Author: Sima

VideoVideo

The video of my homemade bottle rocket, unfortunately without parachute

ResultsResults and tips

  • The project is not really a successfull, as the altitude is almost the same as that of a one-bottle rocket
  • The idea are going to live forever: homemade bottle rockets is very easy to do, ideas for improvements are unlimited

Tags: rocket

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