Northumbrian CYLINDER DRAWINGS

Northumbrian CYLINDER DRAWINGS

This topic has 2 replies, 2 voices, and was last updated 10 September 2010 at 17:54 by JasonB.

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10 September 2010 at 17:06 #55437
bellerophon
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@bellerophon
I’ve only just started the piston/cylinder assemblies. There seems to me to be a mistake in the drawings for the steam passages in that the two 3/32 steam passages from the steam chest are shown on the side projection as going out on the face where the cylinder covers fit – if that were the case the team wouldn’t be admitted into the cylinder bore itself unless the cover had a bypass passage fitted.

THe end projection seems to suggest a filed passage is made into the cylinder bore but this isn’t shown on the drawing –

I’m going to use the technique I used on the Stuart Vertical 10 (also being shown in ME at present) of milling a small relief at the end of the cylinder which will cut into the 3/32 passages
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10 September 2010 at 17:06 #977
bellerophon
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@bellerophon
? Mistake
10 September 2010 at 17:54 #55438
JasonB
Moderator
@jasonb
The text describing the drilling of the passages says “begin by filing a chamfer on the end of the cylinder bore” This is whats shown on the end elevation but there should really be a line to show this on the section

And remember to file the chamfer deep enough so it is not blocked by any spigot on the cylinder covers or file a matching notch into teh cover spigots

Jason
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