CyclePig


May 12th, 2008 / Technique / 4 Comments

Blowing In The Wind

How many times has this happened to you? You are out on a bike ride, feeling strong and going at speeds a few miles faster than what you normally do. You reach the half-way point, then turn and head for home…..and….SLAM!. You find yourself riding into a strong head-wind and struggle the rest of the way home wondering why you ever thought that cycling was fun.

Windy
Photo by Larry Page

Planning Your Route

The impact of the wind can be greatly reduced by adopting an aerodynamic position and drafting behind other cyclists. I will cover each of these topics in future posts.

However, you can make a big difference to the enjoyment of your ride just through the planning of your route. When out on the road, you may not notice that you have a tail-wind and the situation mentioned above can easily arise. The best way to avoid this is to check the weather forecast and see which way the wind is blowing prior to getting out on your bike.

You should then plan your route so you cycle into the wind on the first half of your ride and with the wind behind you on the way back home. I find this is the best way to manage the amount of effort I use over the whole ride and has the added benefit of a mental boost - as you are looking forward to blasting the second half of the ride with the wind at your back.

If you do find yourself cycling into the wind and don’t want to burn yourself out the approach is actually very similar to cycling up hills. Don’t try and go the same speed as you would in still conditions and use an easier gear.

How Much Difference Does The Wind Really Make

Caution: Science Alert

I was curious about how much impact the wind actually has on your cycling so I searched and found this calculator that determines the Aerodynamic Drag and Propulsive Power of a Cyclist.

Using this calculator I found that cycling at 15mph into a 10mph head-wind requires the same effort as cycling 15mph up a slope with a gradient of 3.5% (approx 1.5 degrees). No wonder riding into the wind is tough!

For the purposes of this calculation I compared the following:

  • 180 pound cyclist riding at 15mph into a 10mph headwind on the flat requires a power output of 183 watts
  • 180 pound cyclist riding at 15mph up a slope of 1.5 degrees (approx 3.5%) with no wind requires a power output of 180 watts

I decided to write this after reading a post called ‘Earth, WIND & Fire’ over over on Biking to Live. This a new blog, written by Bryan, and is about his journey of improving his health by cycling. Check it out.

 

4 Responses to “Blowing In The Wind”

  1. BryanNo Gravatar Says:

    Great article and thanks for the link back to my article. Planning the route better would certainly help. Having the tailwind on the home stretch would always be better.

  2. jaxgtrNo Gravatar Says:

    About 3 weeks ago, this happened to me. I got started late, no wind at the time and when it started really blowing it was at my back and then the heat came with it. 20 mph winds and 90 degree heat I was not prepared for. I was one beat pup when I got home. It pays to check the weather before you head out. I always do that, but did not that day. Never again.

  3. jaxgtrNo Gravatar Says:

    Oh yea, Wind is the mountains for a flat land rider.

  4. thePigNo Gravatar Says:

    I think I prefer mountains over wind. At least you can SEE what you are up against.

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