// Aerospike Rocket Engine - Simple Model

$fn = 100;

// Main chamber

module chamber() {

    scale([1,1,1.5])

    sphere(r=20);

}

// Throat

module throat() {

    translate([0,0,-10])

    cylinder(h=10, r1=8, r2=6);

}

// Exhaust nozzle (outer)

module nozzle() {

    translate([0,0,-40])

    cylinder(h=30, r1=6, r2=12);

}

// Aerospike (center spike)

module spike() {

    translate([0,0,-40])

    cone_height = 40;

    cylinder(h=cone_height, r1=10, r2=0);

}

// Assemble

difference() {

    union() {

        chamber();

        throat();

        nozzle();

    }

    // Hollow center थोड़ा realistic করার জন্য

    translate([0,0,10])

    cylinder(h=80, r=4);

}

// Add spike

spike();

• Introduction
• Chapter 1
  1. A few words about OpenSCAD
  2. Getting started with the Tutorial
  3. Basic information about the OpenSCAD environment
  4. Creating your first object
  5. Creating a slightly different cube
  6. Adding more objects and translating objects
  7. The cylinder primitive and rotating objects
  8. Completing your first model
  9. Creating a second model

• Chapter 2
  1. Scaling parts or the whole model
  2. Quick quiz
  3. Parameterizing parts of your model
  4. Parameterizing more parts of your model
  5. Challenge
  6. Parameterizing your own models

• Chapter 3
  1. The sphere primitive and resizing objects
  2. Combining objects in other ways

• Chapter 4
  1. Defining and using modules
  2. Parameterizing modules
  3. Defining default values of module’s parameters
  4. Separating the whole model into modules

• Chapter 5
  1. Creating and utilizing modules as separate scripts
  2. Using a script with multiple modules
  3. Using the MCAD library
  4. Creating even more parameterizable modules
  5. Challenge

• Chapter 6
  1. OpenSCAD variables
  2. Conditional variable assignment
  3. More conditional variable assignments
  4. Conditional creation of objects – If statement
  5. Challenge

• Chapter 7
  1. Creating repeating patterns of parts/models – For loops
  2. Creating more complex patterns
  3. Challenge
  4. Creating patterns of patterns – Nested for loops

• Chapter 8
  1. Rotationally extruding 3D objects from 2D objects
  2. Challenge
  3. Linearly extruding 3D objects from 2D objects

• Chapter 9
  1. Doing math calculations in OpenSCAD
  2. Creating any 2D object with the polygon primitive
  3. Challenge
  4. Creating more complex object using the polygon primitive and math
  5. Another challenge

• OpenSCAD's website
• Download OpenSCAD
• Syntax cheat sheet
• The OpenSCAD Language Manual for use later as a reference.