Fins + Booster (page 3) | Onshape CAD Tutorial | Stage One Education

FINS + BOOSTER

Construct the launch lug, to guide the rocket off the launch platform

Fins + Booster Tutorial
Previous Page: 1 | 2 | 3 | 4 | Next

Advanced mode

18. Create a sketch on the bottom face

▶

||

Now we'll add the launch lug to so we can put the rocket on the pad

Select the sketch tool
Click on bottom of the cylinder
Notice how a new sketch plane is now on the bottom of the rocket
Align your view with the sketch by clicking the Bottom of the view cube

19. Draw the launch lug's inner circle

▶

||

Select the circle tool
Draw a circle outside the rocket. Be sure to snap the circle's center to the centerline.
Select the dimension tool
Click the circle and set its diameter to 0.165

20. Dimension the circle's distance

▶

||

Select the dimension tool
Click the circle, then click the edge of the rocket
Move your mouse so that the dimension is along the vertical
Set the dimension to 0.06
Did you notice how the circle turned black? »

Black lines mean, “fully defined,” which means that you have told Onshape exactly where the line is.
If a line is blue, it means that there are still things to be constrained or dimensioned.

21. Draw the outer section of the launch lug

▶

||

Select the circle tool
Draw a larger circle centered on the existing circle
Use the dimension tool to set its diameter to 0.216

22. Draw the launch lug connectors

▶

||

Select the 3-point arc tool

Set the first point on the circle
Set the second point on the rocket body
Set the third point so that the arc bends inwards.

Repeat for the other side

23. Constrain the launch lug connectors

▶

||

First select:

Top two points on your arcs
The circles' center.

Then select the "Horizontal" tool
You should see all three points line up

24. Add the rocket's side to your sketch

▶

||

Select the Use (Project/Convert) tool
Select the arc on the edge of the rocket
You should see that arc bold as it becomes part of your sketch

25. Connect the launch lug to the rocket

▶

||

Select the "Coincident" tool
Select the point on the bottom of one of your arcs and the edge of the arc on the rocket
Repeat the coincident step for the second arc

26. Constrain the launch lug sides

▶

||

Select the left arc and the outer circle
Select the "Tangent" tool

You should see the arc jump to become tangent and turn black as becomes fully constrained

Repeat for the right-side arc

27. Finish the launch lug sketch

▶

||

Select the trim tool
Trim the bottom of the outer circle

28. Extrude the launch lug

▶

||

Select the extrude tool

Your sketch will automatically be selected

Click the Add option
If needed, click the "Opposite direction" button to make the launch lug extrude along your rocket
Set the "Depth" to 1.2
Click the green check

29. Fillet the launch lug

▶

||

Select the "Fillet" tool
Click the arc on the inside arc of launch lug
Set the "Radius" to 0.2
Click the green check

30. Fillet the launch lug (2)

▶

||

Select the "Fillet" tool
Left and right edges of the launch lug, near the body
Set the "Radius" to 0.1
Click the green check

Fins + Booster Tutorial
Previous Page: 1 | 2 | 3 | 4 | Next