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Big Ascensions
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Big Ascensions
BigAscenders wrote:
45 percent at bottom photo... http://bigascensions.free.fr/loca2004/devil.htm You can't always take road-sign percent grades at face value. Often they represent the steepest short section or even the inside of a turn, rather than the overall grade over an appreciable distance (like 100 meters or more). That said, I'm sure all those roads are quite painfully steep. It is difficult to take a picture that captures the steepness of a grade. |
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Big Ascensions
In article
om, " wrote: BigAscenders wrote: 45 percent at bottom photo... http://bigascensions.free.fr/loca2004/devil.htm You can't always take road-sign percent grades at face value. Often they represent the steepest short section or even the inside of a turn, rather than the overall grade over an appreciable distance (like 100 meters or more). That said, I'm sure all those roads are quite painfully steep. It is difficult to take a picture that captures the steepness of a grade. First step is to use a lens with the proper field of view. "... standard lens which produces a 24x36mm (1x1.5inch) negative - has a 50mm focal length. The normal lens for a camera using 4x5inch (100x125mm) film is 135mm ..." -- Michael Press |
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Big Ascensions
On Sat, 4 Nov 2006 10:07:31 -0800, "BigAscenders"
wrote: 45 percent at bottom photo... http://bigascensions.free.fr/loca2004/devil.htm I remember that in 2002 (or 2001 ?) , some cars could barely make it up the Angliru in the rain, 45% seems...steep ! |
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Big Ascensions
45 percent at bottom photo...
http://bigascensions.free.fr/loca2004/devil.htm I remember that in 2002 (or 2001 ?) , some cars could barely make it up the Angliru in the rain, 45% seems...steep ! From what I understand, the Angrilu isn't anywhere near 45%; it's somewhere in the mid-20s. But I don't think it's the grade that's as important as the composition of the road surface. I'm very experienced with Sonora Pass (in the Sierra Nevada mountains of Northern California), which has grades of up to 26% (if you take the worst lines through the steepest corners), and one section at 8400ft that's a sustained 20% for 1 kilometer. Last month I had the opportunity to find out what it would be like to climb, and descend that grade, in a snowstorm (snow, hail, sleet & rain at various times). Surprisingly, traction was never an issue. On the other hand, I've had problems on some local hills (San Francisco Peninsula) where the grade is only 10%, but tires slip out fairly easily when wet. --Mike-- Chain Reaction Bicycles www.ChainReactionBicycles.com "Keith" wrote in message ... On Sat, 4 Nov 2006 10:07:31 -0800, "BigAscenders" wrote: 45 percent at bottom photo... http://bigascensions.free.fr/loca2004/devil.htm I remember that in 2002 (or 2001 ?) , some cars could barely make it up the Angliru in the rain, 45% seems...steep ! |
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