CAID2 MC Fairing

Motorcycle Fairing

Right-click and "save target as" for the pics below.




Build the basic profile curves with CURVES using the orthographic drawings.
You must consider the continuity for the curves, especially the curves that are normal to the symmetry plane to ensure proper mirroring of the finished halves.





Build the main surface with birail. To ensure continuity make some thin help surfaces at the axis of symmetry. 

Make the main birail surface with tangent continuity along the axis of symmetry. Is it possible to use other methods to ensure the center continuity?  :)





The upper part (fuel tank) surface is now to be built using:

  • the top profile curve and a
  • new cross section BLEND curve that you will build directly off the birail surface

First - ensure that the fuel tank profile curves connects and provides curvature continuity with both ends of the main surface.






Then build the new  cross section BLEND curve.

Ensure that the curve is:

  • tangent continous to the axis of symmetry and
  • curvature continous to the main birail surface.







Build the fuel tank (top surface) using one or more surfaces so that they are continuos with each other as well the main birail surface and axis of symmetry as required. Check the continuity with appropriate tool when the tank is constructed.

Add details:

  • a flared surface on the lower part and
  • a recess surface on the upper part







Build the air intake

Method 1

Start by building the small surface for the air intake by duplicating isoparams from the main surface and using the square tool. Pull the end CVs slightly of the surface inwards but maintain curvature continuity at the start of the air intake.

Method 2

Make the small surface with BLEND curves and Rail tool

Method 3

Make the small surface by copying the main surface and then divide it down to a smaller piece. Carefully pull CVs to achieve the inward bend

Is it possible other methods available?  :)





Add Curves On Surface (COS) to both the main and the small air intake surface. These will be the edges for the recess surface.






Add profile curves that makes contact with the curves on surface with the appropriate continuity. Then use these to build the connectig surfaces (square or birail).

Is it possible to use other methods? Maybe Free form blend tool or   Skin and Align to get curvature continuity?  :)



Trim the surfaces and check your continuity.

How can you check the continuity?

  • Analyze tool 1
  • Analyze  tool 2
  • Analyze  tool 3


Good work!


Fairing Black Green