newtons law.
- Thread starter john robert bould
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2nd Ken's pointing out that only long crankshafts need a damper for their candy cane twist reactions, which damper swallows up in heating rubber before the crank recoil twist back can spike to breakage level. Long cranks have supported mid sections but not our cranks, so the way to envision Norton cranks behavior is similar to a jump rope held by just 2 pinched fingers on handle ends [the bearings] so the mid section crank bow is reversed at the handle ends. The most crank deflect occurs at TDC and just after so the crank ends can tip alternator rotor into the stator to first collide about the 7-8 pm area.
PowerArch has programmable rev limiter and Boyer sells one for their ignitions but don't know how its adjusted or set. Likely other after market ignition have this feature but have not heard of it on other recently sold brands of off the shelf Commando kits.
How to change Earth rotation by man made means is age old past time of new physics students, ie: beginner student not newer non Newtonian physics. If my back-of-the-envelope numbers are right the Earth’s angular momentum about its own axis is ~ 10^34 Joule/sec. and the change in angular momentum of all the cars is ~ 10^12 Js so the day length would change by 10^-17 s. I won’t spoil the game by giving away the sign though. A trick question is how much would the Earth rotation be affected if the traffic in UK reversed lanes to American side? Of course too much of this and our clocks and weights would change, beside ones quality of life style and watch of course.
Above is entertaining nebulous past time but see if your physics scope can cover a slinky toy released to accelerated towards Earth's core, does it drop as a whole or both ends contract till it drops at same speed as a unit or something else happens.
[video]http://www.youtube.com/watch?v=JsytnJ_pSf8[/video]
PowerArch has programmable rev limiter and Boyer sells one for their ignitions but don't know how its adjusted or set. Likely other after market ignition have this feature but have not heard of it on other recently sold brands of off the shelf Commando kits.
How to change Earth rotation by man made means is age old past time of new physics students, ie: beginner student not newer non Newtonian physics. If my back-of-the-envelope numbers are right the Earth’s angular momentum about its own axis is ~ 10^34 Joule/sec. and the change in angular momentum of all the cars is ~ 10^12 Js so the day length would change by 10^-17 s. I won’t spoil the game by giving away the sign though. A trick question is how much would the Earth rotation be affected if the traffic in UK reversed lanes to American side? Of course too much of this and our clocks and weights would change, beside ones quality of life style and watch of course.
Above is entertaining nebulous past time but see if your physics scope can cover a slinky toy released to accelerated towards Earth's core, does it drop as a whole or both ends contract till it drops at same speed as a unit or something else happens.
[video]http://www.youtube.com/watch?v=JsytnJ_pSf8[/video]
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Rohan said:
Yes, Boyer and PVL offer them and I use them.
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Torsional Failure .
P.S. It was found, quite early on, that inline cranks needed some full circle counterweights, or something approximating to them, or torsional breakages were all too frequent when ringing more performance out of them. The old bent-bit-of-wire crankshaft had had its day......
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As the dreaded torsional damper is usually used to damp the dreaded Harmonic Vibrations , there could be some merit in a isolastic Flywheel . Though itd be rotationally iso howsited .
this is alledgedly part of it .
Straight Eight cranks suffered HARMONIC problems, which is where a torsional damper comes in .The hamonic bit means forces overlap multiplying or cumulative loadings .
Which is where if some silly ass puts the counterweight flanks in some silly position, its started the prgressive rotational enterprise which the fireing impulses add to .
Increaseing the power output .
And the rate of rotation is more constant .
Some type chucked a B.M.E.P. ( pressure guage ) on a cylinder and recorded the figures at ea degree of rotation .It varys considerably, even immensly ( on a single Cyl ) from
the Max. + to slightly Neg. pressure ( in the combustion chamber ).thus the acceleration of the crank through each rotation is not constant .
The'Harmonic ' problem is if as the force from one peak input travles along the shaft , it coincides with the next ( at its source perhaps ) Doubling the transmitted strain / impulse
at that point in the material .
thus flywheel mass is part of a equation in loadings ( rotationally ) in the parrallel crank pin two ( main ) bearing crank assembly . As In if there is a impusle at the Rt. crankpin , transfered in part to a
non perpendicular rotational ( sideways force at flywheel / crank centre ) coincideing through loadpath ( crank material ) with the next impuse from the left crankpin , the ragged helical pattern of
strain is not passed advantageously as regards the materil ( crankwaeb ) .
Fudge .
this is alledgedly part of it .
Straight Eight cranks suffered HARMONIC problems, which is where a torsional damper comes in .The hamonic bit means forces overlap multiplying or cumulative loadings .
Which is where if some silly ass puts the counterweight flanks in some silly position, its started the prgressive rotational enterprise which the fireing impulses add to .
Increaseing the power output .
And the rate of rotation is more constant .Some type chucked a B.M.E.P. ( pressure guage ) on a cylinder and recorded the figures at ea degree of rotation .It varys considerably, even immensly ( on a single Cyl ) from
the Max. + to slightly Neg. pressure ( in the combustion chamber ).thus the acceleration of the crank through each rotation is not constant .
The'Harmonic ' problem is if as the force from one peak input travles along the shaft , it coincides with the next ( at its source perhaps ) Doubling the transmitted strain / impulse
at that point in the material .
thus flywheel mass is part of a equation in loadings ( rotationally ) in the parrallel crank pin two ( main ) bearing crank assembly . As In if there is a impusle at the Rt. crankpin , transfered in part to a
non perpendicular rotational ( sideways force at flywheel / crank centre ) coincideing through loadpath ( crank material ) with the next impuse from the left crankpin , the ragged helical pattern of
strain is not passed advantageously as regards the materil ( crankwaeb ) .
Fudge .
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Great responce's lads!
But if the Commando crank is subject the flex,rather than torsonaly twist...then if the bulk of the cranks weight [flywheel] is isolated with a rubber sandwich would this rubber absorb the primery flex?
But if the Commando crank is subject the flex,rather than torsonaly twist...then if the bulk of the cranks weight [flywheel] is isolated with a rubber sandwich would this rubber absorb the primery flex?
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Spinning the Earth faster? Surely when the Norton commandos after a force on the earth will be cancelled out when they brake? Newtons law again.."equal and oposite re-action".
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john robert bould said:
Short answer - no.
Upon initial acceleration of the bike relative to the surface of the earth there is a net force difference but since the bike continues through a viscous fluid (air) it continues to impart force upon the surface of the earth. This cannot be recaptured by braking. It is energy imparted upon (between) the surface of the earth and air and is a function of "things" including time, speed, aerodynamic coefficient, density of the air etc. This energy is "lost" to heat imparted on the air.
In a vacuum you would probably be correct, though being realistic here, you would then have some serious carbeuration problems. :roll:
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Short answer No, anything flexable in line with the crankshaft will just allow more jump rope like bowing with ends teeter tottering oppositely. What is long done to help stifle the jump rope with most its mass and jerk loads in the center, moving more mass off center flywheel nearer the bearing helps increase rpm tolerance.
Alrighty Shrapnel you upped the nick picking physics enough to make me think, [ugh, therefore I am, I think] You are correct to stick to your guns that there is never any new energy created or lost in a system, but energy with an over all vector [force with a speed and direction] a'int the same as similar among of energy that is diffused in about every direction. So sticking with Netwon level thermodynamic if all Nortons took off at once in one direction then the Earth would get a boost or a dray depending on which way they aimed thrust. Their air heating resistance would not be as efficient coupling as tire on rubber and the extra heat would thin and lower local air pressure so even less Earth inertial coupling but that much closer to ice caps melting, which could imbalance the top like gyration of the planet, which could pretty suddenly then go out of balance - water mass vs crust mass locations, so planet axis of rotation would shift, which would move the equator, which the swollen centrifugal belt of ocean water would settle over poplulated land area for another mythological flood story next root race may find and scratch heads on fossilized Commandos. So thank goodness we all don't drive on same side of the road at once. !st Law of Matter would come into play then and put a stop to it anyway.
Above is old school physics so doesn't take in the force of consciousness on physics of existence but to make a long story short, its all pure magic in the end.
[video]http://www.youtube.com/watch?v=cIDvEAnSEIA[/video]
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If all vehicles drove westwards it would speed the earth up
Well , allthe werserners would get fat & lazy , even if they got there faster .
All the asians would get fit & healthy , as theyd have to walk & thered be no traffic fumes there .
Now , shipping all the coal to China & India , is the planet getting heavier there , and it going to fall to the bottom ? Where will the equator be after this ? .
Well , allthe werserners would get fat & lazy , even if they got there faster .
All the asians would get fit & healthy , as theyd have to walk & thered be no traffic fumes there .
Now , shipping all the coal to China & India , is the planet getting heavier there , and it going to fall to the bottom ? Where will the equator be after this ? .
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