Aero power savings

Excellent article on aero savings from a full on TT frame compared to normal bike.

http://www.bikeradar.com/road/fitness/article/how-aero-is-aero-19273?source=newsletter&attr=road/2008/11/27#post_comments

Tested indoors and out in various combinations. Results of outdoor test:

Speedway data

Set-up	Estimated Ave CdA (m^2)	Speed (km/h)	Power (W)
Tarmac SL2 | Road Helmet | Drop bars	0.310	40.10	306.6
Tarmac SL2 | Road Helmet | Clip-on aerobars	0.267	40.27	268.6
Tarmac SL2 | TT2 Helmet | Clip-on aerobars	0.256	40.38	261.0
Transition | Road Helmet | Aerobars	0.265	40.17	262.9
Transition | TT2 Helmet | Aerobars	0.230	40.05	229.0

So I could save 70W when I get my tri bike. Put another way if I can get to a drag of 0.23 then Analytic cycling reckons I can do 30mph! Will be interesting.....