OBB WHEELERS 40KM TIM TRIAL AUGUST 26TH.
Since we are getting a really good turn out for the midweek events, we are starting the event next Thursday at 6.30pm to ensure good light for the later starters. Those who find it difficult to get to start by 6.30pm will be able to start later.
AUG.19TH. OBB WHEELERS 31KM ITT, NANAIMO RIVER ROAD We had another good turnout for mid August and it was great to see the kids
out riding. Our new 30 km course turned out to be 31km. so adjusted times
for 30km are also provided. In the men’s event, Don Gillmore started last but
was fourth to finish, posting the fastest time. In the women’s race, Janna
Gillick and Erin Hibbitts had their usual battle, with Janna edging out Erin by
48 seconds. Full results and 30km times here.
Next week, there will be a 40km ITT starting at 6.30pm.
WHICH IS FASTER, WIND OR NO WIND? If a rider goes 10km in 15 minutes with the wind and 10km against the wind in 20 minutes, a total time of 35 minutes for the 20km, then how long would it take her to ride 20km with no wind? A popular misconception is that the advantage given by wind assistance and the disadvantage of riding against the same velocity of wind will cancel each other out. This in fact is incorrect because she received wind assistance for only 15 minutes but rode against the wind for 20 minutes.
If she can go 10 km with the wind in 10 minutes, then it is clear she can cover 13.3km in 20 minutes. So this gives a total of 23.33km in 40 minutes. Therefore, riding 20km with no wind (with a similar effort) will take her (40 X 20)/23.33 or 34’20”. This is 40 seconds faster than in windy conditions. In fact, as the speed of the wind increases, the time will increase
On the Nanaimo River Road course however, another significant variable is introduced by the turn around being more than 200 feet above the start/finish. It would seem that a light westerly breeze might produce the fastest times. Of course, the riders always hope for no wind on the way out and a rising gale back to the finish!
THIS WEEK'S 30KM TIME TRIAL. The turnaround is marked (about 1.5km before the end of pavement. Temperature on the Nanaimo River Road. is a few degrees cooler than in town and there's lots of shelter from the trees. See you all there on Thursday.
CYCLING FAMILY ON 11,000 KM TRIP Go to GENERAL INTEREST PAGE for full story
