| 11. | As of September 2014, the motor drive is being serviced and the rope and sheave method is once again in use.
|
| 12. | Sheave and rope wear may be significantly reduced by ensuring that all ropes have equal tension, thus sharing the load evenly.
|
| 13. | Where there is no space to rig a sheave the requisite distance from the drum, two additional spooling devices are available.
|
| 14. | By decreasing the width of the sheave on the input shaft of the transmission, the belt would ride higher in the groove.
|
| 15. | The diameter of a head block sheave used for galvanized aircraft cable is typically at least 48 times the diameter of the cable.
|
| 16. | The main sheet block is a fiddle attached to the slide, and a dual sheave block on the boom with the upper.
|
| 17. | The sheet comes off the upper large sheave to a block / camcleat mounted to the deck swivel for 6 : 1 purchase.
|
| 18. | Sheave blocks, winches and snatch blocks were used to facilitate the lifting, and cables inside the pylons were stressed with jacks.
|
| 19. | The lifting device was a winch attached to a cable that fed over sheave ( pulley ) mounted on a mast behind the cab.
|
| 20. | The dome tower and equatorial room are original save a motor drive which replaced the old rope and sheave method of rotating the dome.
|
