This is the final virtual wind tunnel test for Veloci Velomobile. After tweaking the shape I have managed to get the CdA to 0.0945 which is just short of the Quest velomobile (If anyone has a 3d file of the Quest velomobile I would like to test it using my settings) This means for an input of 200W from the rider Veloci should be capable of 47 km/hr which is about 30% faster than a UCI racing bicycle. Of course in bicycle racing the bunch rules and riding in a bunch sees an improvement of about 30% over riding solo. Elite riders can maintain 47 km/hr by having a power ouput of 500W + but this velomobile can maintain the same speed for much less power output.
Using the virtual windtunnel it was calculated that the shape of veloci velomobile has a drag co-efficient of 0.27 using this information to calculate the cdA which is cd X A (frontal area) = cdA.
Knowing that the frontal area is 0.45m2 X 0.27 = 0.1215 cdA which I believe to be pretty slippery. The Quest velomobile has a cdA of 0.09 but this is not confirmed as accurate or in what configuration. So for a velombile that will cost a quarter of what a Quest will be nearly as aerodynamically efficient. It was also interesting to note that a lowracer such as the M5 has a cdA of 0.14 which is very good and is due to the very small frontal area and the tailbox, the great thing with these bikes is that they are so light (claimed 8.5kg) . This has made me think about the suitability/practicality of velomobiles as a lowracer can get pretty close aerodynamically and weigh a lot less than a velomobile. This is why I believe a lightweight velomobile (under 20kg) would be very effective as long as its cdA is low (0.10-0.08 would be optim).