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Thank you for your reply. I am no engineer, but what do you think about this quote from Wikipedia? I will read your reply with interest then stay out of AoM for a while!
Quote

The gate is carved so that it fits within a quarter of an inch of the walls. It was well-balanced, reportedly so that a child could open it with the push of a finger. The mystery of the gate's perfectly balanced axis and the ease with which it revolved lasted for decades until it stopped working in 1986. In order to remove it, six men and a 50-short-ton (45 t) crane were used. Once the gate was removed, the engineers discovered how Leedskalnin had centered and balanced it. He had drilled a hole from top to bottom and inserted a metal shaft. The rock rested on an old truck bearing. It was the rusting out of this bearing that resulted in the gate's failure to revolve. Complete with new bearings and shaft, it was set back into place on July 23, 1986.[18] It failed in 2005 and was again repaired; however, it does not rotate with the same ease it once did.

Susan

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Subject Views Written By Posted
Welcome to RL Poole, our author of the month for March 2020 1095 Graham Hancock 05-Mar-20 14:51
Re: Welcome to RL Poole, our author of the month for March 2020 267 RLPoole 05-Mar-20 20:59
Re: Welcome to RL Poole, our author of the month for March 2020 262 Susan Doris 08-Mar-20 15:11
Re: Welcome to RL Poole, our author of the month for March 2020 261 PB Bytes 08-Mar-20 17:18
Re: Welcome to RL Poole, our author of the month for March 2020 255 greengirl5 08-Mar-20 22:06
Re: Welcome to RL Poole, our author of the month for March 2020 249 PB Bytes 09-Mar-20 19:05
Gates and gates 254 greengirl5 09-Mar-20 22:15
Re: Gates and gates 235 PB Bytes 10-Mar-20 16:43
Re: Welcome to RL Poole, our author of the month for March 2020 237 Open mind 11-Mar-20 13:54
Re: Welcome to RL Poole, our author of the month for March 2020 244 Susan Doris 11-Mar-20 18:24
Re: Welcome to RL Poole, our author of the month for March 2020 240 Open mind 11-Mar-20 18:56
Re: Welcome to RL Poole, our author of the month for March 2020 233 PB Bytes 11-Mar-20 18:59
Re: Welcome to RL Poole, our author of the month for March 2020 267 RLPoole 09-Mar-20 01:59
Re: Welcome to RL Poole, our author of the month for March 2020 259 Susan Doris 09-Mar-20 10:21
Re: Welcome to RL Poole, our author of the month for March 2020 254 RLPoole 09-Mar-20 13:29
Re: Welcome to RL Poole, our author of the month for March 2020 248 Susan Doris 09-Mar-20 13:40
Re: Welcome to RL Poole, our author of the month for March 2020 252 RLPoole 09-Mar-20 14:21
Re: Welcome to RL Poole, our author of the month for March 2020 251 Susan Doris 09-Mar-20 18:17
Re: Welcome to RL Poole, our author of the month for March 2020 237 RLPoole 11-Mar-20 05:16
Re: Welcome to RL Poole, our author of the month for March 2020 234 Susan Doris 11-Mar-20 06:07
No electric or battery drills in those days 251 greengirl5 11-Mar-20 07:32
Re: No electric or battery drills in those days 249 RLPoole 11-Mar-20 08:45
Re: No electric or battery drills in those days 240 greengirl5 11-Mar-20 12:55
Re: No electric or battery drills in those days 243 Open mind 11-Mar-20 19:36
Re: No electric or battery drills in those days 241 greengirl5 11-Mar-20 21:32
Re: No electric or battery drills in those days 264 Open mind 12-Mar-20 01:29
Re: No electric or battery drills in those days 243 PB Bytes 11-Mar-20 20:00
Re: No electric or battery drills in those days 359 RLPoole 01-Apr-20 03:05
Re: Welcome to RL Poole, our author of the month for March 2020 234 Open mind 11-Mar-20 16:48
Re: Welcome to RL Poole, our author of the month for March 2020 221 RLPoole 01-Apr-20 02:53


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