Stonehenge experiment
P A N E L T H R E E
How to rotate it
Once a satisfactory method
of moving the the replica stone had been worked out, the team turned their minds to the problem of raising it.
They recreated the shape of the holes discovered in 1923, adding a concrete pivot block at the leading edge to provide a stable point around which the block could pivot accurately.
The diagrams illustrate the rotation sequence. The 'tipping point' of the block was moved forward to make rotation possible using less manpower. The presence of the pivot block raised the stone's pivot axis, plus additional stones were placed on top and moved forwards to tip the balance.
© 2007 Engineering Timelines