Thread: How much did your Dynamo setup cost?
View Single Post
Old 03-07-16 | 02:58 PM
  #15  
Tourist in MSN
Senior Member
15 Anniversary
Community Builder
Active Streak: 30 Days
 
Joined: Aug 2010
Posts: 12,728
Likes: 2,105
From: Madison, WI

Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.

Originally Posted by tarwheel
...Moreover, I estimate that the dynamo hub slowed down my average speeds about 0.50-1.0 mph over the course of the winter. ....
I suspect not. I can't tell if my light is on or off with my SP PV8. And at this link: http://www.ctc.org.uk/file/public/fe...ub-dynamos.pdf They measured the drag on the PV8, at 20 km/hour with the light on, drag is equivalent to climbing 6 feet per mile, with the light off only climbing 1 foot per mile, see graph. So, with the light on it is equivalent to climbing a grade of about 0.12 percent, which is so flat that I would not be able to notice.
Tourist in MSN is offline  
Reply
0