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  #11  
Old December 26th 18, 12:27 AM posted to rec.bicycles.tech
James[_8_]
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On 25/12/18 11:13 am, John B. Slocomb wrote:

Or for us guys:
https://www.researchgate.net/publica...g_aerodynamics


I'll have to read that again. Thanks.

--
JS
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  #12  
Old December 26th 18, 12:32 AM posted to rec.bicycles.tech
John B. Slocomb
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On Tue, 25 Dec 2018 11:09:35 -0600, Doug Cimperman
wrote:

On 12/24/2018 11:23 PM, John B. Slocomb wrote:
On Mon, 24 Dec 2018 23:08:52 -0600, Doug Cimperman
wrote:
...
Another possible option would be to build a motorcycle with digital
steering--drive-by-wire. Similar to ABS, even a cheap microprocessor
could make control corrections dozens of times a second,,, way faster
than any human can. (or use both these systems)


Racing motorcycles seem to get along without auto-steering. At least
at current speeds.

cheers,

John B.



Except when they don't.
https://www.google.com/search?client...+tank+slapping


The argument ignores the fact that "speed wobbles" or "tank bangers"
are not a new phenomena. Way back in the un streamlined days bikes
used to wobble. In those days it was almost always found that
replacing worn bushings in the front fork suspension cured it :-)


cheers,

John B.


  #13  
Old December 26th 18, 06:41 PM posted to rec.bicycles.tech
[email protected]
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Posts: 1,261
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On Tuesday, December 25, 2018 at 3:32:28 PM UTC-8, John B. Slocomb wrote:
On Tue, 25 Dec 2018 11:09:35 -0600, Doug Cimperman
wrote:

On 12/24/2018 11:23 PM, John B. Slocomb wrote:
On Mon, 24 Dec 2018 23:08:52 -0600, Doug Cimperman
wrote:
...
Another possible option would be to build a motorcycle with digital
steering--drive-by-wire. Similar to ABS, even a cheap microprocessor
could make control corrections dozens of times a second,,, way faster
than any human can. (or use both these systems)

Racing motorcycles seem to get along without auto-steering. At least
at current speeds.

cheers,

John B.



Except when they don't.
https://www.google.com/search?client...+tank+slapping


The argument ignores the fact that "speed wobbles" or "tank bangers"
are not a new phenomena. Way back in the un streamlined days bikes
used to wobble. In those days it was almost always found that
replacing worn bushings in the front fork suspension cured it :-)


cheers,

John B.


In the speed regime of an upright bike, the reduction in friction would not have any effect because while the streamlining increases, the speed is insufficient to overcome the greatly increased surface area.
 




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