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If the ball decelerates about 6 pockets per second and if the wheel moves 6 pockets per second (slow), reference time would be 1 sec. Fast rotor 2s/r moves 18.5 pockets in one second, it means about 3 seconds reference time. 3 seconds is hard to count and keep accurate time, if timer is used there is another problem
explained here http://rouletteplace.com/index.php?topic=1019.msg9052#msg9052.
On a 2 seconds/r rotor the green area would be much wider.
In same post the other picture represents traditional VB (predicting at particular ball rotation) with green and blue areas together about same size as green area on a VB2 example. With fast rotor traditional VB will have blue and green areas on opposite sides often overlapping ball jumps. But also if the ball makes an extra rotation on the end of spin the player may get same result as predicted since 2s/r rotor and last ball rotation (takes about 2 sec/r) have similar speeds.
And wich reference time do you yhink I need to use?by my calculations I got somewhere to 2 sec.this should be ok or I need to increase it a little bit?Thanks!
Calculating time you do if you have particular version of FFA or if you have recorded video spin.
Alternatively you do it by applying same time 2 x and checking if you get same result.
If on first attempt you read number x and right after on second attempt you read number x + 10 pockets; it means the time you applied is to short.