On Apr 23, 12:23 pm, Tom Anderson wrote:
This has been semi-seriously proposed in relation to cycle lanes - since
the main limit on bike speed is air drag, if you move the air at 10 mph in
the direction of travel (involving putting the cycle lane in a tube), you
give everyone a 10 mph speed boost.

Bear in mind though , if you cycle at the same speed as the moving air
you'll have no wind to cool you. And if you're in an enclosed tunnel
you'd probably get pretty hot & sweaty pretty quickly! Besides which ,
having a forced air tunnel rather defeats the purpose of zero
emissions cycling since something will have to power the fan.

B2003