Speed of Di Roulette Rotor
How fast di numbers dey pass, and why dat one matter pass di ball.

Normal rotors dey turn for 0.3–0.5 rev/s and dem dey lose speed slowly. Over ball flight of 15 seconds, di rotor dey turn 5–7 times, so small timing mistake dey become big pocket mistake.
How to Measure Am
Time one full revolution of di zerowheelZeroDi one green pocket wey no even-money, dozen or column bet dey cover; na im be di source of di house edge. Dem also dey call am: single zero, 0.Read di whole tin → pocketequipmentPocketOne of di 37 small boxes wey get number for di rotor. Dem also dey call am: slot, cup.Read di whole tin → as e pass one fixed reference like deflectorequipmentDeflectorOne of di metal tins for di apron wey dey scatter di ball as e dey fall. Dem also dey call am: canoe, diamond, pin.Read di whole tin →; do am three times and find di average. For live stream you fit do am from di video, but remember sey di stream na replay. RotorequipmentRotorDi part of di wheel wey dey spin and carry di pockets.Read di whole tin → speeds dey change by dealer: some dey push am hard pass. Houses dey set minimum (so dat di wheel no go ever almost stop) and dealers dey push am again between rounds. Di table below dey work like roulette wheel speed calculator: find your seconds for each lap and read di speed for revolutions and pockets every second.
Why Predictors Dey Care
Any estimate of where di ballequipmentBallDi small ball wey dem dey throw for di track against di rotor. Modern balls na ivorine or Teflon, 18–21 mm.Read di whole tin → go drop must match where di rotor go dey for dat exact moment. For 15 pockets every second, 0.1-second mistake for di drop time na 1.5 pockets; 0.5-second mistake na about one fifth of di wheel. Rotor phase na di easy half of di problem, becos di rotor heavy and e dey slow down small small; ball drop time na di hard half.
Decay
Good rotor bearing dey lose only few percent of im speed over round of one minute, so for di whole time of one ball flight you fit treat di rotor as constant. Over one shift, e go stop if di dealer no push am. Predictors dey measure di rotor once every round; di ball plenty times every round.
Direction
For many houses, dealers dey change di rotor direction from one round to di next. Dem dey always launch di ball against di rotor. To change direction dey change di scatter pattern, becos di ball dey hit di deflectors from di oda side, so predictor need two scatter distributions for each wheel.
Wetin Player Fit Learn from Dis
Notin about di odds. Di rotor na clock, and to sabi im speed dey tell you how fast di pockets dey pass; dat one interesting only if you also sabi when di ball go drop. For di bias analysis of di Lab, di rotor speed no matter: bias na about which pockets dey come more over thousands of spins, no be about where di rotor dey for any one moment.
Questions wey pipo dey ask
E dey make timing hard pass and scatter wide pass. Di odds na 1/37 for each pocket, no matter wetin.
To keep am above di minimum speed of di house. Slow rotor dey easy to time.
Small laugh

Heavy clock wey dey slow down small small, e dey tick 15 pockets every second.
Sources
- Small, M. & Tse, C. K. “Predicting the outcome of roulette.”
- Barnhart, R. T. Beating the Wheel.