neilw
now that's what I call a garden railway
Posts: 284
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Post by neilw on Jun 22, 2012 11:55:26 GMT
does anyone know why the standard "S1" chair ended up with with the three-hole design it did, ie two on the inside, one on the outside?
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Jun 26, 2012 21:14:18 GMT
Possibly beacause a triangle is a strong shape and having three screws helps stop the chairs from rotating.
Also having three screws in a triangle means that no two screws are in a straight line along the grain of the sleeper so reducing the likelyhood of the sleeper splitting. Two screws offset diagonally would save the grain problem, but experience with Pan9's a two bolt FB baseplate suggests that they often rotate somwhat. This both galls the foot of the rail and can make re-railing more difficult.
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