Quote:
Originally Posted by Ecky
Some thoughts on your drawing:
The upward taper at bottom of the nose may be worse than having a sharp edge - it encourages more air under the velomobile.
-The taper in the rear may be too rapid.
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Air dams are a popular hack to reduce drag and lift with a rough undercarriage, but with a smooth bottom, more underflow gives a venturi effect for downforce. The trick with this construction method is to minimise flow over the edges, which is very disruptive and hard to predict by eye. However, it may help to spoil the "lift" in a crosswind by encouraging early separation on the downwind side.