A paradoxical thought experiment
in [Motorcycles]
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From: tomorrow on 8 Jul 2010 16:22 On Jul 8, 2:54 pm, Henry <9-11tr...(a)experts.org> wrote: > Twitbull imagined: > > > In real life, on real roads, a riderless bike will fall over rather > > quickly. > > Wow. Poor twit. Even the obvious, simple things in life, he > can't understand. Earth to twit - many people, including myself > have seen bikes roll along without a rider for considerable > distances. Yep. And then fall over quite quickly. Like Pete said. In fact, Chris Ulrich's GSXR1000 AMA superbike "uncrashed" itself in the grass off the main straight of VIR racetrack several years ago, and proceeded, with a throttle stuck wide open, to continue, riderless, all the way across the grass (a distance of some 70-80 yards) until it ran into the woods at the edge of the track property and crashed. Ergo, a riderless bike that rolled along for a considerable distance, but that also fell over quite quickly.
From: tomorrow on 8 Jul 2010 16:23 On Jul 8, 3:50 pm, "S'mee" <stevenkei...(a)hotmail.com> wrote: > On Jul 8, 12:47 pm, Twibil <nowayjo...(a)gmail.com> wrote: > > > On Jul 8, 11:05 am, Mark Olson <ols...(a)tiny.invalid> wrote: > > > > A riderless bike will happily stay upright so long as it is moving. > > > Put a throttle lock on it and give it open space and it will go > > > until it runs out of gas. > > > Only on some ideal -but unreal- perfectly flat surface that extends > > forever. > > Wrong again...it can and will change direction due to impacts with > imperfections but that's about it. > > > In real life, on real roads, a riderless bike will fall over rather > > quickly. > > No it wont. Yes it will.
From: sean_q_ on 8 Jul 2010 16:28 tomorrow(a)erols.com wrote: > BZZZT. Wrong. Having "flown" the car on both sidecar rigs I've > owned, once the sidecar is in the air, and as long as it is in the > air, the motorcycle steers via counter-steering (albeit quite > awkwardly). It should be intuitively obvious, bit if it isn't to you, > just try it - it will be very obvious upon practical application. I don't want to try this, but there's something I think I should know... Assuming the chair on the right, if I make a left turn hard enough to capsize the rig, intuitively I'd think it would roll around the axis between the front wheel and sidecar wheel contact patches. Is that correct? SQ
From: sean_q_ on 8 Jul 2010 16:39 tomorrow(a)erols.com wrote: > In fact, Chris Ulrich's GSXR1000 AMA superbike "uncrashed" itself in > the grass off the main straight of VIR racetrack several years ago, > and proceeded, with a throttle stuck wide open, to continue, > riderless, all the way across the grass (a distance of some 70-80 > yards) until it ran into the woods at the edge of the track property > and crashed. I wonder if there would be any military applications for something like this. Imagine a high-explosive-laden, satellite or drone-guided Hayabusa tear-assing along at 150 mph across the open desert seeking out enemy targets. A lot more economical than a cruise missile. SQ
From: The Older Gentleman on 8 Jul 2010 16:42
sean_q_ <nospam(a)no.spam> wrote: > I wonder if there would be any military applications for something > like this. Imagine a high-explosive-laden, satellite or drone-guided > Hayabusa tear-assing along at 150 mph across the open desert > seeking out enemy targets. A lot more economical than a cruise missile. I think, given the terrain, that a BMW R1200GS might be more effective ;-) -- BMW K1100LT Ducati 750SS Honda CB400F Triumph Street Triple Suzuki TS250ER GN250 Damn, back to six bikes! Try Googling before asking a damn silly question. chateau dot murray at idnet dot com |