Just calculated the distance the needle travels on a record (per side) to be about 500m.
A cursory look online suggests other people with far too much time on their hands / reasons to procrastinate suggests they concluded similar. So that's a relief.
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So the edge of your record is passing the needle at a whopping 1.884 km/h
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@Graham Dunning Uhm, very blurry calculation. I assume you mean 1,884 km/h on average.
Worth noting: No record has the same grove length, which depends on length & frequency content of program material, and volume settings during cutting, which then depend on cutting engineer skills and grade of assistance by computers pre-reading audio material and setting grove distance accordingly on the fly. We work with a Neumann VMS70 here, it does have a rudimentary computer assisting the engineer.
Additional info : #^https://www.vinylengine.com/turntable_forum/viewtopic.php?t=17225
Still, assuming a 12" side length of 24 mins (= approx. 516 mtrs on average) the actual speed is varying, getting significantly slower towards the center. Also no sane cutting engineer would cut 24 mins onto just one side, as that means, that this record will be pretty low on volume, and the bass will be strongly rolled off. • sent from #Hubzilla at #Fediverse.
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@jrp yeah I went with 23 mins and took an average speed between outer circumference and approx inner one. Like I said - a rough calculation!
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@grahamdunning now I’m curious about the numbers for CDs
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@grahamdunning are you serious? this is more than the speed of sound. shouldn't there be a loud bang if it goes under this (like in the middle of the first song?) :D
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@noisio That was surely just an English komma - and the whole calculation is a bit off. I think @Graham Dunning just did it for the fun of it. :) • sent from #Hubzilla at #Fediverse.
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@jrp ah. probably. for sure. yes this makes sense.
500 m for one side, with around 20 minutes, gives 1500 m in an hour. And the speed should be the fastest at the beginning.
English komma confused me. will remember ... still learning a lot here :)
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@jrp calculation is about right I think.
Circumference = π x 0.3m
Time = 1.8 sec per rotation
Speed = 0.942 / 1.8
=> meters per second
=> kilometers per hour
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@noisio just under 2km per hour isn't very fast!
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@grahamdunning yes ... @jrp already pointed me to this.
I missed the english comma. Was reading too fast and didn't made the rough calculation by myself in the first point :)
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@noisio @jrp cool, yeah makes sense. I found it a fun little calculation to do!
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