[Dsg-rich] Question regarding RICH rotation calculations

[Tyler Lemon]

Hello Sandro, 

We've been reviewing the calculations you provided for the forces during the RICH rotation and have a question. Attached are two slides with the diagrams showing the RICH in its horizontal and vertical positions for reference. 

For the horizontal position, L3 is to the lift point where the winch cable attaches to RICH. However, in the vertical position, L3 is to the detector's center of mass. Was a different calculation used for the vertical position that required a different definition of L3? 

Please let us know as it would help us better understand the forces on the assembly structure components during the RICH rotation process. 

Best regards, 
Tyler 
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