Minnie blowdown bush

[Mark BParticipant @markb43031]

I'm just seeking information from anyone who has made a 1" Minnie traction engine.

I am in the later stages of making the boiler and in the book there is a mention of a blowdown bush and it even includes a drawing of it. What I can't see i the book or the drawing is the location of it.

Looking at pictures online it looks like it goes on the throat plate very low down on the off-side.

Does anyone know the exact location as I really can't see this from the drawings.

[Mark BParticipant @markb43031]

[Richard S2Participant @richards2]

Not an exact location needed, but preferably as close to the top of the foundation ring as practicable and in from the edge to clear chain drum and damper flap workings to aid maximum draining.

Mine works out to about 1/2" (12.7mm) up from the bottom of the foundation ring and 1/2" in from the wrapper side to the centre of the bush (mine is 7/16" did and comfortably clears the stay above it-

Your boiler is coming on well.

Edited By Richard S2 on 04/09/2020 23:17:42

[JasonBModerator @jasonb]

Mine sits about 1/2" in from the wrapper but is lower at about 3/8" up grom bottom of throatplate and is also a smaller OD. This is a Blackgates boiler. I tend to use it to connect a hose for air running.

[Mark BParticipant @markb43031]

Thanks for the pictures – this help a lot.

[Dave HalfordParticipant @davehalford22513]

Mark,

If you checkout the photos in the boiler section it shows the bush hole drilled

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