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Stepping up
Wednesday:
I had already chickened out of riding to Open Air Nursery and was climbing the courthouse steps to make up for it when I saw the burger truck on Center Street, but buying hot food made a good excuse for riding straight home as fast as I could. I climbed each flight three times, and there were fourteen steps in each flight. How much of the extra mile did I make up for? Two steps equal one rotation of the cranks. Seven times nine is sixty-three. Round off to seventy-five because there were four extra steps on the west side. The development of a 27" wheel, my handy-dandy solar calculator tells me, is 85". Thursday: Counting the teeth on sprockets and cogs is much harder than one would think. Determining, with some difficulty, the number of legs in each spider (five front and six back) and counting teeth between legs, I come up with thirty-five teeth on my inner chainwheel and thirty-three on my largest cog. This can't be right. I'll just say that each turn of the pedals equals two turns of the back wheel. 75 steps x 85" x 2/step x 1 feet/12" = 75 x 85" x 1/6 feet= 25 x 85 x 1/2 feet = 1062.5 feet. About one fifth of the distance from the courthouse to Open Air. I did come down the steps, but I have to come back from Open Air also. The bisonburger was still warm when I got home. Lots of insulation in the pannier helped. -- Joy Beeson joy beeson at centurylink dot net http://wlweather.net/PAGEJOY/ |
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