Saturday, April 28, 2012


I have sketched a new shape with a fish like tail. I think I have over done it a bit. I did a CFD at 10m/s. It looks like the flow separates at ~ 0.6 from the front. Forces : pressure drag 1.4 N viscous drag 1.1 N. My guppy is not a realistic velomobile: the head space is missing, the shoulder space and ground clearance are much to small.

I very happy that I can sketch a new shape and evaluate the aerodynamics in one day only... (Although I should be very modest about the quality of my judgements)

The fish tail with S-curve 

Compared with the Quattro (Quattro is a design of Miles Kingsbury)

p/rho [m^2/s^2]
Air velocity

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