Northumbrian Footplate mounting.

[ChrisParticipant @chris16039]

[ChrisParticipant @chris16039]

Hi fellow builders,

I have discovered what may be a mistake with the footplate drawings re the front mounting holes.

These holes are shown as being 21/8″ from the back of the plate, if this is the case they miss the mounting rail which is centred at 2″ from the back.

As you will doubtless have guessed I discovered this in metal not on paper!

Now do I make a new foot plate or fabricate a wider mounting rail?

Tony made considerable play in his first article about his mates in the 21/2 Association checking his drawings. Perhaps he should go back to them for a second reading.

Chris. 

[David Clark 13Participant @davidclark13]

Hi There

Two locomotives have been built from these drawings.

Can you double check your dimensions?

regards David

 

[David Clark 13Participant @davidclark13]

Hi There

I have just looked at the drawing.
Front holes in footplate appear to be 3/8 back, 1/4 + 1/8.

That means 2inch from back.

Is this what you mean?

regards David

 

[David Clark 13Participant @davidclark13]

Hi There

I see what you mean now, the two inside holes at 17/8 apart.

Does look like an error.

I suggest you try using a bit of 3/8 x 1/4 bar for footplate support and drilling holes to suit or fill the footplate holes with a ctsk rivet and redrill the holes slightly closer together.

I will talk to Tony with a view to publishing a correction.

regards David

 

[JasonBModerator @jasonb]

I think Chris is right the 2 3/8″ is to where the plate narrows and the holes are shown at 1/4″ back from this point which puts them in the wrong place. The whole plate is 2 1/2″ front to back (2 3/8 + 1/8) so 2 1/2 less 3/8 (1/8 + 1/4) is 2 1/8″. Its the holes that are on 1 7/8″ cts not the ones near the edge.

 

I think you said that the drawings had been redrawn for the ME articles, so the ones that the author had checked may have been copies of his originals.

 

Jason

 

PS any news on the cylinder position query yet?

 

 

Edited By JasonB on 04/08/2009 16:33:09

Edited By JasonB on 04/08/2009 16:33:26

[David Clark 13Participant @davidclark13]

Hi There

I have a copy of the original drawings that are to scale.

The cylinder pitch is 6inches to centreline and runout is 3/8 down.

regards David

 

[JasonBModerator @jasonb]

Posted by David Clark 1 on 04/08/2009 17:07:16:

 

The cylinder pitch is 6inches to centreline and runout is 3/8 down.

 

 

 I was asking about the cylinder in relation to the holes for item 10, see the last half dozen posts in the “first project” thread.

 

If drawn using the dimensions on the ME Drawing the six cylinder mounting holes come out further back than shown.

 

Can you confirm that the 9/16 dimension mid way along the top is correct as it is drawn far larger than the 9/16 bolt spacing and looks more like 3/4, if it were 3/4 this would put the cylinder fixing holes and holes for item 10 all in the right place.

 

Maybe the original drawings could be added to the articles section.

 

And while I’m on there does not seem to be any length given for the firebox support, it is just shown as a dotted outline on the frame drawing and the “1/8″ clear locate from frame”  note about the central hole is where the dimension should be.

 

Jason

Edited By JasonB on 04/08/2009 18:01:10

Edited By JasonB on 04/08/2009 18:03:46

[ChrisParticipant @chris16039]

Hi David and Jason,

Thanks for your interest in this problem. If my observation has saved someone else a problem I am happy.

My comments about checking the drawings were in no way a slight on your checks as editor David. I wouldn’t know where to start reading and checking someones drawings, a point made clear by my cutting metal before finding the small error.

Thanks,

Chris

[David Clark 13Participant @davidclark13]

Hi There

Yes, measures 3/4inch.

I will talk to Tony tomorrow.

regards David

 

[JasonBModerator @jasonb]

Thanks David

 

Although I am not building this loco (I became involved when another member pm’d me with a query) It seems a shame that a project aimed at beginners has so many errors/missing data.

 

This is likely to put new model engineers off rather than encourage them particularly as it looks like anyone who has made a start on their frames will have to scrap them as there is no easy way to add 3/16 to their length.

 

I hope that these revisions will be published in ME ASAP to prevent anyone without net access from making thes eerrors.

 

Jason

[David Clark 13Participant @davidclark13]

Hi There

I have not said it is incorrect but that it scales at 3/4inch.

regards David

 

[JasonBModerator @jasonb]

See here for the revised drawing

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