#1
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Look Ma! No hands!
To the 7 cyclists I passed this morning riding through hyde park, who
seem to think brakes and steering are for wimps: It might have been cute when you were ten and riding in a field, but when you are 15 stones, hurtling down a shared use path at 15-20mph, carrying about 8kJ of kinetic energy, and have no brakes or steering to avoid dogs and children, as well as ignoring other pedestrians and cyclists who are forced to scatter out of your irratic course in your arrogant quest, it's not "cool". |
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#2
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Look Ma! No hands!
carrying about 8kJ of kinetic energy,
While I agree wholeheartedly about the sentiment, how on earth did you get 8kJ of energy? By my count, 20mph is roughly 8.9 m/s, and 15 stone is roughly 95 kg... which means the bike would have to weigh another 15 stone or so to get 8kJ! |
#3
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Look Ma! No hands!
Brian wrote: carrying about 8kJ of kinetic energy, While I agree wholeheartedly about the sentiment, how on earth did you get 8kJ of energy? By my count, 20mph is roughly 8.9 m/s, and 15 stone is roughly 95 kg... which means the bike would have to weigh another 15 stone or so to get 8kJ! They were about 4.55m above the ground? (If my GPE calculations were correct) -Alex |
#4
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Look Ma! No hands!
Paul Weaver wrote:
To the 7 cyclists I passed this morning riding through hyde park, who seem to think brakes and steering are for wimps: It might have been cute when you were ten and riding in a field, but when you are 15 stones, hurtling down a shared use path at 15-20mph, carrying about 8kJ of kinetic energy, and have no brakes or steering to avoid dogs and children, as well as ignoring other pedestrians and cyclists who are forced to scatter out of your irratic course in your arrogant quest, it's not "cool". Yet despite the problems lots of folk seem to not only get around Dutch towns without bothering too much about the handlebars, but they seem to be able to conduct conversations on their mobile phones at the same time with no consequent carnage... While not wanting to suggest that no-hands is a Good Idea, it's not nearly as fraught with collateral damage as some might assume. Did any of the 7 above crash into anything or anyone? Were they /really/ erratic (no-hands can be steered with leaning, but is typically quite a straight-ahead operation, almost always straight ahead at 15+ mph)? And unicycles /are/ cool, actually! Pete. -- Peter Clinch Medical Physics IT Officer Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net http://www.dundee.ac.uk/~pjclinch/ |
#5
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Look Ma! No hands!
Peter Clinch wrote: And unicycles /are/ cool, actually! What about a recumbent unicycle? The following has some other wierd and wonderful contraptions... http://www.geocities.com/rcgilmore3/ExtremeBikes.htm -Alex |
#6
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Look Ma! No hands!
Alex wrote:
The following has some other wierd and wonderful contraptions... http://www.geocities.com/rcgilmore3/ExtremeBikes.htm The Unipsycho looks like a "concept machine" Cannondale took to a show a few years back for fun. I think even for those that Know What They're Doing (that doesn't apply to me), clipless pedals are generally felt to be Not A Cunning Plan on unis... The Schlumpf geared unicycle is a wondrous thing, even though I wasn't good enough to change gear on the move when I tried it. If^H^HWhen I win the lottery or my Premium Bonds come up I will spend the £700 or so and have my own. Pete. -- Peter Clinch Medical Physics IT Officer Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net http://www.dundee.ac.uk/~pjclinch/ |
#7
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Look Ma! No hands!
Brian wrote: carrying about 8kJ of kinetic energy, While I agree wholeheartedly about the sentiment, how on earth did you get 8kJ of energy? By my count, 20mph is roughly 8.9 m/s, and 15 stone is roughly 95 kg... which means the bike would have to weigh another 15 stone or so to get 8kJ! Havey rucksack ? (Forgot the half in 1/2mv^2). I blame the coffee. |
#8
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Look Ma! No hands!
Peter Clinch wrote: And unicycles /are/ cool, actually! Yeah, if you're Krusty the Clown! I Just spent the weekend learning to ride one, and my right ankle-bone is bruised to shtie, a curse on the inventor of the poxy yokes! |
#9
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Look Ma! No hands!
"Alex" writes:
They were about 4.55m above the ground? (If my GPE calculations were correct) That would be potential energy, not kinetic energy. OK, it's potentially kinetic energy ... -dan -- http://coruskate.blogspot.com/ why skate when you can talk about it instead? |
#10
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Look Ma! No hands!
Paul Weaver wrote on 02/08/2006 09:58 +0100:
It might have been cute when you were ten and riding in a field, but when you are 15 stones, hurtling down a shared use path at 15-20mph, carrying about 8kJ of kinetic energy, and have no brakes or steering to avoid dogs and children, as well as ignoring other pedestrians and cyclists who are forced to scatter out of your irratic course in your arrogant quest, it's not "cool". Wow, 8kJ of energy. Enough to boil half a cup of water! -- Tony "Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory." - Leonardo da Vinci |
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