"Gregory Hall" wrote in message
...
|
| "Bret Cahill" wrote in message
| ...
| Have they tried dimples on radio controlled aircraft? The size and
| speed could designed around the magic Reynolds number = 100,000 where
| the coefficient of drag drops precipitously.
|
| Dimpling could vastly extent the range of large and slow as well as
| small and fast radio controlled aircraft.
|
| A competitive cyclist is the right size and speed for Nre = 100,000 so
| dimple suits can work. Same for golf balls.
|
| Nre = 100,000 for widebodies going 0.5 knots so dimples won't work
| except on the runway.
|
| From fluid mechanics the Reynolds number is the ratio of inertial
| forces/viscous forces.
|
| N re = Diameter X velocity X density of fluid/viscosity of fluid.
|
|
| Bret Cahill
|
|
|
| Do her dimples make her faster?
|
| http://underscorebleach.net/content/.../p2/arched.jpg
|

No, I think it is more likely her dimples would make you faster.