Lol, I sure as hell wanted one though... dreamed about them, all the time...[COLOR=#black].[/COLOR]1oldman2 said:
1oldman2 said:
https://en.wikipedia.org/wiki/CountersteeringWilbur Wright said:
this out, too...
Sweet! The Limey bikes are a family tradition here, although I did have a "sporty" at one time, The 850 commando is a kick in the ass also.OCR said:Sooo... you had a 650 Bonneville, huh? ... well now I'm mad, 'cause I never did...[COLOR=#black].[/COLOR]
Lol, I sure as hell wanted one though... dreamed about them, all the time...[COLOR=#black].[/COLOR]
https://en.wikipedia.org/wiki/Countersteering
And
https://en.wikipedia.org/wiki/Bicycle_and_motorcycle_dynamics
Ha!... but I do have a 1986 1,100 cc Harley Sportster, with the Evolution engine ... the first year Harley made them...[COLOR=#black]..[/COLOR]
1oldman2 said:The 850 commando is a kick in the ass also.
I owned a Norton 850 command for a few years. The engine, transmission, and swing arm pivot were attached to a sub-frame (two pairs of plates, one pair in front of engine and one pair in back of engine, plus a mount at the top) rubber mounted to the main frame to reduce vibration. Exhaust pipes were also rubber mounted. The shift was on the right, and also "backwards": 1 up (shift from first from neutral) and 3 down (for "upshift"), the opposite of most other bikes.
YupOCR said:
jedishrfu said:
Gyroscopic precession is a reaction to torque along the roll (lean) axis, not a reaction to lean angle, which means it's not a corrective reaction. If a bike is in a coordinated turn, there's no torque about the roll axis and no gyroscopic reaction that would tend to return a bike to a vertical orienation. During the time a bikes lean is increasing, the gyroscopic reaction is to steer less than what is needed for correction, and during the time a bikes lean angle is decreasing, the gyroscopic reaction is to oppose what is needed to complete correction back to vertical orientation. For a typical bike that uses trail for stability, gyroscopic reaction acts as a damper within the range of speed for self stability. Once above that speed, the dampening effect dominates and the bike goes into what is a called capsize mode, where the lean angle increases at an extremely slow rate. To a motorcycle rider at high speed, the perception is that lean angle is held, this could be due to the extremely slow rate of lean angle increase, or since the tire's contact patch is on the inside portion of a tire, an outwards roll torque may be having an additional effect.
OCR said:
gave son my '85, last of the old guard ironheads.OCR said:Ha!... but I do have a 1986 1,100 cc Harley Sportster, with the Evolution engine ... the first year Harley made them...[COLOR=#black]..[/COLOR]
jedishrfu said:
I saw a real one parked at Fisherman's Wharf, when my family and I stayed in San Jose while visiting myjim hardy said:
Yup, '85 was the last of them...
1956 , imported to US with nameplate "Indian" , 694cc twin, single carb ,OCR said:
85 is s a good year if you like the retro look, has the Evo clutch with alternator in the chaincase(like my '56 indian) , and an oil filter where the generator used to be.OCR said:
Yeah, they do, but... it's a good look.[COLOR=#black]..[/COLOR]jim hardy said:
Lol...[COLOR=#black]..[/COLOR]
I read the article a few days ago soon after it was published by the Washington Post. Very fascinating and interesting to study. I have done study on bicycles and motorcycles myself on a small scale and knew about most of what is in the article. Riding motorcycles at a high speed around a curve leaning over to almost a 45 degree angle is scary because of the fear of sliding on even a small amount of loose gravel. I have done it numerous times and never slid. I believe because of the gyroscopic effect holding the line of movement.jedishrfu said:
golfrmyx said:
"Bicycle Physics: Breaking the Math Barrier" is a book that explores the science behind how bicycles work, including the mathematical concepts that explain their motion and stability. It also delves into the history and development of bicycles as well as the environmental and health benefits of cycling.
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