In order to make the crane practical, it must be able to be constructed and adjusted quickly and easily, without the need for tools. To make this possible, the sections which it breaks into for transport will be assembled using pins which will fit into joints, and be prevented from moving in place by the use of retaining pins or 'R Clips'. The inspiration for this has been taken from the way in which a medium girder bridge (MGB), made by WFEL Ltd and in service with the british army, is assembled and held together. Pictures of these pins will be uploaded when we have obtained them.
The 'R' clips are shown below, and it is anticipated that they will be purchased from an external supplier because they are avaliable mass produced.
The pins which will be used in the crane have been modelled in CAD, and will be made from steel.
15mm diameter general connecting pin
20mm diameter top beam connecting pin (showing R clip hole)
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