Tuesday, November 1, 2011

F1 car design in Catia V5 xi

Time to create the profiles used to make the airbox

Create a new geometric set, AIRBOX LOFT, put geometric sets PROFILES and SURFACES under it.

Copy the rearmost NOSE & MONOCOQUE TOP LOFT profile and paste it into the PROFILES set


We'll use this profile and modify it, in order to ensure the cockpit sides match up. Have a look at REFERENCE LINES - COCKPIT - SIDE PROFILE 2 - POINTS. The vertical infinate line represents the place where the cockpit top stops being a straight line and starts curving upward. I want to move the airbox front profile in front of this line to aid in connecting the nose & monocoque top loft and airbox loft.



From a front view of this profile, I'm going to impose curvature and tangency at the point where the profile interects with the cockpit guides. I'm doing this to preserve the shape of the cockpit sides, so they match up well with the nose & monocoque top loft.


Now I'm going to start using the guidelines earlier created for the airbox to make some new points for this profile.


Connect up the profile with these points


Close, but no cigar. You can see the sketch we made of the shape in the background. This needs to be further constrained.


That's better, I'm satisfied with that shape.

Copy this profile and paste it, moving it all the way to the back of the car. Looks a bit wierd, we'll work on that.


Bizarro look is because of all the tangecy and curvature impositions to guidelines.


Just remove some of the tangecy and curvature.


Tune the vector norms to get the desired shape


Unhide the 3D GUIDELINES


Create a multi-section surface using the two new profiles and existing guides.


Open up REFERENCE LINES - COCKPIT. We're going to make a new cutting surface. Insert a new geometric set. Add the necessary guide to create a sweep off the endpoint of SIDE PROFILE 2.


Create a sweep


Cut the multi-sections surface of the Airbox with this sweep


Now we're in business

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