Engine restraints


in which we stop the engine from undergoing rapid unscheduled disassembly

28. Create a plane representing the top of the engine

We need to make a stopper so the engine doesn't explode out of the top of the rocket.
  • Start a new plane with the plane tool
  • Select the bottom face of the rocket
  • If needed, click the "Opposite direction" button to make the plane appear in the middle of the rocket
  • Set the "Offset distance" to 2.9
  • Click the green check

29. Start a sketch on that plane

  • Select the sketch tool
  • Click "Plane 1"
  • Select the "Top" of the view cube to align your view with the sketch

30. Sketch the engine block

  • Select the circle tool
  • Start the circle on the center point
  • Draw a circle smaller than the rocket
  • Use the dimension tool to set the diameter to 0.6

31. Add the rocket's body to your sketch

  • Turn your view slightly
  • Select the Use (Project/Convert) tool
  • Click the inner circle of the rocket
  • You should see that line bold as it becomes part of your sketch

32. Extrude the engine stop

  • Select the extrude tool
    • Your sketch will automatically be selected
  • If needed, click the "Opposite direction" button to make the extrude go upwards
  • Set the "Depth" to 0.5
  • Click the green check

33. Start engine clip sketch

We need a clip to stop the engine from exploding out of the back of the rocket when the recovery (reverse) charge goes off.
  • Select the sketch tool
  • Start a sketch on the bottom face of the rocket
  • Select the Use (Project/Convert) tool
  • Click the inner circle of the rocket
    • You should see that line bold as it becomes part of your sketch
  • Align your view with the sketch by clicking the Bottom of the view cube

34. Sketch the engine clip arc

  • Select the 3-point arc tool
  • Set the points:
    1. Edge of the circle, to the left
    2. Edge of the circle, to the right
    3. Set the radius so the arc curves towards the rocket's center

35. Dimension the engine clip arc

  • Select the dimension tool
  • Click the outer circle and then the arc and set the distance to 0.04
  • Use the dimension tool again to set the arc's radius to 0.1

36. Constrain the engine clip arc

  • Select the "Vertical" tool
  • Click the arc's centerpoint and then the origin of the rocket
  • You should see the arc jump to the center

37. Trim the engine clip sketch

  • Select the trim tool
  • Trim the bottom of the inner circle

38. Extrude the engine clip arc

  • Select the extrude tool
    • Your sketch will automatically be selected
  • If needed, click the "Opposite direction" button to make the extrude go upwards
  • Set the "Depth" to 0.09
  • Click the green check

You finished the fins and the booster


We recommend next working on the nosecone.