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Rob Roy chimney position

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Anthony Taunton	30/08/2020 17:47:41
8 forum posts	Looking at the Rob Roy drawings, and about to bore my smokebox, it appears that the longitudinal position of the centre of the chimney/petticoat pipe is not shown. Scaling off the drawing with dividers it appears to be half way along the smokebox, so 1.1875". However, the smokebox door ring is 5/16" deep, and the drawing shows the bottom of the 1.5" diameter chimney flange co-incident with the rear edge of it. This makes the chimney flange 9/16" from the rear of the smokebox i.e not in the middle. No direct dimension is shown.
Baz	30/08/2020 20:07:57
1033 forum posts 2 photos	Sorry I cannot give you a dimension but the chimney must be in line with the blast pipe which originates from the centre of the cylinder so I would suggest a bit of measuring off the job itself. Martin Evans never seems to give the dimensions that you need.
Anthony Taunton	01/09/2020 10:24:43
8 forum posts	Thanks for your reply Baz. All sorted now, thanks for your help.

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