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Which software do you recommend for creating turbomachinery cad model?

1. I have two recommendeations

a. Catia (But I am told it is complicate software)

b. rhino3d and rhino3d with t-splines

2. They also told me that catia is feature based modeler and rhino is spline based modeller. I dont know what does it mean. Can any body explain whats differce between feature based and spline based modeller?

3. I am also told that Pro-E (creoelements) is the worst choice.

4. What about solid works and solid edge ?

5. Any idea about space-claim?

6. What are your views about ansys designmodeler and its limitations ?