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seen Jul 25 at 13:11

Jul
23
revised What makes a wrist-energized gyroscope rotate faster?
Measurement of diameters with a caliper; report top speeds, clarify Q1.
Jul
23
comment What makes a wrist-energized gyroscope rotate faster?
I have added the diameters of shaft where it is rolling (2.5 mm) and washer (60 mm), now measured with a caliper. Yes, the spinning rate of the rotor is about consistent with the hypothesis (which I take as fact) that the shaft is rolling on the casing. After some practice, I am now convinced that the "right" movement of the casing to spin-up the rotor is one that presses the casing on the rotor, in a way such that friction tends to increase the spin rate, rather than slow it down (which occurs when the casing is left idle).
Jul
23
revised What makes a wrist-energized gyroscope rotate faster?
Measurement of diameters with a caliper; report top speeds, clarify Q1.
Jul
23
revised What makes a wrist-energized gyroscope rotate faster?
Measurement of diameters with a caliper; report top speeds.
Jul
22
revised What makes a wrist-energized gyroscope rotate faster?
Remive whobling
Jul
22
revised What makes a wrist-energized gyroscope rotate faster?
Mention three modes
Jul
22
revised What makes a wrist-energized gyroscope rotate faster?
Try a quantitative approach to confirm rolling
Jul
22
revised What makes a wrist-energized gyroscope rotate faster?
friction is instrumental in spinning-up the rotor
Jul
22
revised What makes a wrist-energized gyroscope rotate faster?
Polish
Jul
22
revised What makes a wrist-energized gyroscope rotate faster?
State diameter of shaft and whasher
Mar
17
comment What makes a wrist-energized gyroscope rotate faster?
@user3058846: when something gains speed by friction (in some Galilean referential), in all examples I know, this is thanks to something with a faster speed (in that referential). As tentatively explained in the updated question, I do not see that this is the case here, at least if I consider rotation along the rotor's axis (which, admittedly, is not speed gain in a proper Galilean referential; perhaps what I perceive as a paradox comes from that).
Mar
17
revised What makes a wrist-energized gyroscope rotate faster?
Update with interrogation on why friction can increase the spin rate, and question 2
Mar
16
revised What makes a wrist-energized gyroscope rotate faster?
Fix typo
Mar
16
comment What makes a wrist-energized gyroscope rotate faster?
@user3058846: but usually, friction tends to slow motion, be it linear or rotational. If friction plays a role in the rev up (and I'm ready to believe that), it must be by transferring a torque to the rotor.
Mar
16
asked What makes a wrist-energized gyroscope rotate faster?
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