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Twright

Twright's 4mm CAD workbench - Series 2 Land Rover

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Looks good, what's the smaller diameter tube inside the boiler for?

 

Edit - looks like it was just the angle of the render and it's the smaller diameter of the boiler itself.

Edited by simon br blue

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Looks good, what's the smaller diameter tube inside the boiler for?

 

Edit - looks like it was just the angle of the render and it's the smaller diameter of the boiler itself.

 

Yes, it's just the inside of the boiler at a thickness that'll print

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These are the gears for the gearbox in the order they will go in:

 

post-19880-0-87121900-1397656525_thumb.jpg

 

This is a reduction of 32:1

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The lubricator pipe cover (the thing behind the chimney) isn't as wide as you've made it. The prototype is probably about 5" wide, and straddles the front tank strap. Not sure about its lateral position though.

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The lubricator pipe cover (the thing behind the chimney) isn't as wide as you've made it. The prototype is probably about 5" wide, and straddles the front tank strap. Not sure about its lateral position though.

 

Is this better?

 

post-19880-0-37204700-1397658284_thumb.jpg

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These are the gears for the gearbox in the order they will go in:

 

attachicon.gifgearbox.jpg

 

This is a reduction of 32:1

 

That looks highly promising. I particularly like the way you've attached the initial spur to the back of the bevel. 

 

I'm all for low-resistance drivetrains to the extent that I refuse to use worm gears in my experimental builds.

Edited by Horsetan

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Is this better?

 

Yes, although I don't know whether the cover fitted on the preserved 1638 is prototypical. The 54xx looks like it could be a different pattern. You'll need a standard plate top like the 54xx though.

 

You really need a good overhead shot of 1638 - someone must have one? Or put out a request for anyone visiting the Kent & East Sussex this summer.

 

 

 

 

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Yes, although I don't know whether the cover fitted on the preserved 1638 is prototypical. The 54xx looks like it could be a different pattern. You'll need a standard plate top like the 54xx though.

 

You really need a good overhead shot of 1638 - someone must have one? Or put out a request for anyone visiting the Kent & East Sussex this summer.

 

 

Looking at the plans I have it should have 2 levels to it instead of 1 with a slope to the tanks - I'll change it.

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Yes, although I don't know whether the cover fitted on the preserved 1638 is prototypical. The 54xx looks like it could be a different pattern. You'll need a standard plate top like the 54xx though.

 

You really need a good overhead shot of 1638 - someone must have one? Or put out a request for anyone visiting the Kent & East Sussex this summer.

 

 

 

 

So near, and yet so far.

 

Maybe these parts could be printed as separate fittings, so that builders can add / modify them before fitting them.

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That looks highly promising. I particularly like the way you've attached the initial spur to the back of the bevel. 

 

I'm all for low-resistance drivetrains to the extent that I refuse to use worm gears in my experimental builds.

 

Thanks, it should work nicely transferring the power from the motor in the firebox along the inside of the frames to the middle axle.

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So near, and yet so far.

 

Maybe these parts could be printed as separate fittings, so that builders can add / modify them before fitting them.

 

I am thinking of making some of them separate to cater for different levels of detail.

On a similar note, the smokebox will be made separate so that weights can be put inside.

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....the smokebox will be made separate so that weights can be put inside.

 

Separate door, for those who want to try making one that opens up?

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However in this drawing (not the one I'm using) it doesn't show it - is it a mistake or did some of them not have it.

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Separate door, for those who want to try making one that opens up?

 

Not hinged but yes - if I get round to doing it I'll make an imitation of the end of the tubes if I can get a picture of them or if I can't I'll use my experiences of a 4575 to make an interpretation.

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A question from me - the bars on the rear cab windows - should I include them or leave it for whoever buys it to add them?

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A question from me - the bars on the rear cab windows - should I include them or leave it for whoever buys it to add them?

 

Leave them. Bars are probably better rendered as etchings or separate wire.

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Thanks, I've taken them out of the drawing which saves 10p on the cost - it now costs £23.17 in white plastic (not including gears or chassis as it isn't built yet).

Edited by Twright

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I noticed when I had uploaded it to Shapeways that on the render of it, the chimney appears to be solid however I had drawn it hollow connecting through to the smokebox. It is the same for white plastic and FUD even though I believe it meets the criteria for a hollow object. Can anyone help with this/what have I done wrong?

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I've done the wheel arches now - the outside dimensions being scale and so it is suitable for all types of 4mm track - OO, EM, P4

 

post-19880-0-45638300-1397743241_thumb.jpg

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