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Modeling a Mountain Bike

Import the file ‘Curves4.3dm’ from the CD-ROM. The curves are already in a new layer called ‘Curves-4’. Notice a second layer called ‘Curves-5’, which contains curves you will create surfaces from later on. Make the ‘Curves-4’ layer the only one visible.

Make a ‘Rail Revolve’ with the curves shown below, and repeat this with the curves below.

Do this with the curves shown here as well:

Do a ‘Sweep 1 Rail’ with the curves shown below.

Repeat this with the curves shown below. (The other curves are hidden for better visibility).

Repeat again, with the curves selected below. Do the same with the three curves in the other end. Then join the three surfaces together.

Repeat the same steps with the curves shown below.