|
I don't think you need the shark fin. But be on the lookout for the car showing an instabilty at higher speeds, i.e. it wants to wander left and right. If you see this then the center of mass is not in front of the center of drag and you are getting a lot of lift. On your front engine car I would think it would be OK, as long as you keep the tail weight low. Also try sharp jerks of the steering at low speed. Does the weight (or moment of inertia) of the tail make the car oscillate from side to side after you straighten the wheel? This would be bad also in a panic accident avoidance event.
The crosswind problem is a different one. This problem will be caused by the long tail behind the rear wheels, i.e. the wind can push on the tail sideways and try to rotate the car around the back wheels. Even if you do not have a shark fin.
The shark fin makes the cross wind problem worse, not better. And the fin only helps the stability at high speeds.
|