Can you post wind tunnel results please? CoD differences?
I have not been to the tunnel with this yet (the A2WT.com wasn't around when I did this originally). All aero work has been done at the track (and back roads at night) with data acquisition on multiple bikes.
The first test was from a standing start and 1.75-miles long. I did 3 runs with the stock fender, 3 runs with the ryno, then 3 runs back with the stock.
with stock fender
138.0 mph, 138.7 mph,138.4 mph
with the ryno
141.5 mph, 142.0 mph, 141.8 mph
back with the stock fender
137.8 mph, 138.2 mph, 138.0 mph
This data showed an average increase in top speed of 3.6 mph. The peak engine speed during these runs was about 11,000 rpm. I had just had my bike on a dyno and from 10,750 to 11,250 rpm my bike was making 84 horsepower. At top speed, where the speed-limiting factor is not gearing, the output horsepower is approximately equal to the aerodynamic drag, neglecting rolling resistance. You can use this assumption to get an approximate number for the drag coefficient.
The equation for aerodynamic drag needs an accurate frontal area (very difficult on a bike especially with different size riders) so we us CdS which is drag coefficient times frontal area to compare similar sized bikes.
The results were: Stock CdS = 4.66, Ryno CdS = 4.31.
This is 7.5% which is equal to a 6.7 hp increase.
Another test was at Grattan Raceway in MI. It has a 0.6 mile front straight and took turn 12 exit speed and speed at the turn one brake marker.
We got 9 fast laps with the stock fender then 11 fast laps with the ryno.
Stock: Average Turn 12 exit speed = 71.5 mph
Stock: Average Turn 1 Braking speed = 132.8 mph
Ryno: Average Turn 12 exit speed = 70.6 mph
Ryno: Average Turn 1 Braking speed = 134.9 mph
This is a 3.0 mph gain down the front straight, solid proof aero matters. Corrections in the right location make a huge difference.