Ed, look at this thread on TTF, plus there are a load of other threads too. Basically as Xav says, ride a short loop at a known power and then use the aero-lab feature in golden cheetah to estimate CdA. As I understand it the real important bits are a good bit of traffic free road with a good surface and a sensibly designed testing protocol.
Re. Wales, I did have a cheeky look and I'll reply in the Tri thread so as not to get too SLVLSS in here.
Ed, look at this thread on TTF, plus there are a load of other threads too. Basically as Xav says, ride a short loop at a known power and then use the aero-lab feature in golden cheetah to estimate CdA. As I understand it the real important bits are a good bit of traffic free road with a good surface and a sensibly designed testing protocol.
Re. Wales, I did have a cheeky look and I'll reply in the Tri thread so as not to get too SLVLSS in here.