From on operations standpoint, ideally you have at least enough logs/boats to ensure that there is always another one ready to enter load assuming a perfect dispatch every single time.
Using an imaginary version of Splash/Tiana's as in example, the ride loads 3 logs at a time and has a ride time of 12 minutes. Another assumption is under idea circumstances it takes 1 minute from the 3 logs entering the load/unload to leave the area. Finally lets assume they stagger the 3 log releases every 20 seconds to spread out the course
So after 12 minutes we need all 3 original logs back ready to meet the load/unload station
Time of where Log 1 is | Where is log 3 into the ride? | How many logs have left unload ideally |
0 | 0 mins | 3 |
1 min | 40 seconds | 6 |
2 mins | 1 min, 40 seconds | 9 |
Break | | |
12 mins and 40 seconds | 12 minutes (Ready to enter load | 42 |
Now as boats 43,44,45 leave the station in 20 seconds boats 1,2,and 3 are ready to take their place. (Boat 4 will bump right into 3 as it's taken into the unload station in 20 seconds)
However, if the ride misses even 1 of the ideal 60 second dispatch times, boats 43,44,45 are waiting to enter the loading area still, so 1-3 will bump in behind them. If it misses more and more, the back up gets bigger and bigger
So ideally this ride have 45 logs on it, but to be safe, however, most people would probably add at least 6 more incase a calculation or 2 is off.