Its probably pretty basic but for some reason I cannot remember this - On a rotating axis, if the axle is a constant speed, what is the speed relation, in rpm, 3" from the center as to 6" from the center? Twice as slow / twice as fast / or the same speed? I think its slower the further away from the center you go. If I remember right, this is the old way machine tools controlled their speed.
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Ma che cazzo state dicendo? :| -
Linear speed is doubled, rotational speed is the same.paint sucks -
the plane won't take off.past:
1989 325is (learner shitbox)
1986 325e (turbo dorito)
1991 318ic (5-lug ITB)
1985 323i baur
current:
1995 M3 (suspension, 17x9/255-40, borla)Comment
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w=v/r => v=rw
if r1=3, and r2=2*r1=6, v1=3*w, v2=6*w
v2=2*v1, w is constant.
In words, the farther you go from the center of the axis with a constant rotational speed, the higher your linear speed will be.Comment
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CBrian JacobsComment
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It's been a while but a big diameter wheel will have less revolutions than a smaller wheel. We see this on our cars when we run wheels with smaller overall diameter than what came stock so our speedos read higher than we are actually traveling. However, if you're talking about 1 wheel, it will have the same RPM 6" from center that it does 3" from center since it's a solid wheel."I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj
85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
88 M3 - LACHSSILBER/SCHWARZE
89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER
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ok so no matter what size pulley I use, it will always be spinning at the driving rpm anywhere on the pulley. Its the linear speed that varies. Thus a 6" pulley is spinning slower than the 3" driving pulley because its coupled with a belt moving literally linearly.Ma che cazzo state dicendo? :|Comment
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thisOriginally posted by Wh33lhop View PostThe American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. -Alexis de TocquevilleOriginally posted by Fusion
The Desire to Save Humanity is Always a False Front for the Urge to Rule it- H. L. Mencken
Necessity is the plea for every infringement of human freedom. It is the argument of tyrants.
William Pitt-Comment
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This probably doesn't help much but the only thing i know is that people change the pulley sizes on supercharged cars to make more boost.M42: Because 110 feels like 140 :finger:Comment
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similar principal, smaller pulley = faster rotor speeds (rotational speed) = more boost this is more to do with gear ratios than axle speedsOriginally posted by SpoolnDaapex View Post
But when you have something that is attached to the same axle the further away you get from the center of the axle the faster the liner speed needs to be to make 1 Revolution at the same rate as the center of the axle.The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. -Alexis de TocquevilleOriginally posted by Fusion
The Desire to Save Humanity is Always a False Front for the Urge to Rule it- H. L. Mencken
Necessity is the plea for every infringement of human freedom. It is the argument of tyrants.
William Pitt-Comment
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Hahahaha YES!Originally posted by dk View Post-Erik
'16 Focus 2.0L - '99 Protegé DX 1.6L POS (Sold) - '87 4runner 22R-E (Sold) - '86 Schwarz S50 (Sold) - '02 WRX Wagon (sold) - '07 Impreza 2.5i (sold) - '91 Alpine M52 (Sold) - '89 Alpine 325is (Sold)
Originally posted by 87e30Comment
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Yes. The belt will be moving at the same linear speed with either pulley, and a 6" pulley would turn over at half the speed of a 3" pulley for any given linear belt speed.Originally posted by b*saint View Postpaint sucksComment
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Originally posted by teamdynasty43Comment
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