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Post Info TOPIC: MK1 new project
cpljimmy


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MK1 new project
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I've been looking at Philthydirtyanimals tank pictures for more than a year, and thought about building a MK1 for some time. I logged on here and found Helens great prints. Thank you Helen.

 

I just finished a Rolls Royce armored car and wanted a new challenge, the Rolls is "24 long and I thought the MK1 should be large also.

 

This is going to be a long time project, I am planning on having the tracks moveable and possibly motorized depending on what I find as far as chains, gears and sprockets go. I use .045 cold rolled steel and welding wire and CRS rod.

 

I'll post updates here and on my flickr page

Jim



-- Edited by cpljimmy on Sunday 10th of February 2013 12:40:08 AM

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MK1 Nut


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Hi Jim,

No need to thank me Jim I do this for the love of it... get excited every time a new MK1 model is started. :)

If this model is finished to the same standard as your other models then I can't wait. Anything I can do to help just ask.

Helen x

 



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TinCanTadpole


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This looks interesting Jim, is to a specific scale? Next to that inch tape, I would say it looks about 1/18th.

Regarding chain for tracks, the nearest sizes you'll find are half-inch or perhaps 3/8th-inch pitch, which correspond to 1/15 and 1/20 respectively. Any other scale would mean a compromise if you wanted to use roller chain and commercially available sprockets, or else making all of the track hinges yourself.

Hope this helps, and good luck with the project.


TCT

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Hero

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Chain sizes.. well reminded... found these people when I was on a internet hunting session... Motion Industrial Products.

They give few measurements, but list manufacturers of chain which can then be looked up on the net. It does though give some images of some very interesting shape links.



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cpljimmy


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TinCanTadpole wrote:

This looks interesting Jim, is to a specific scale? Next to that inch tape, I would say it looks about 1/18th.

Regarding chain for tracks, the nearest sizes you'll find are half-inch or perhaps 3/8th-inch pitch, which correspond to 1/15 and 1/20 respectively. Any other scale would mean a compromise if you wanted to use roller chain and commercially available sprockets, or else making all of the track hinges yourself.

Hope this helps, and good luck with the project.


TCT

 

Thanks, my concern was not about scale but building it large enough to include the details I want. I enlarged Helen's prints to "9 and doubled that size, so its "18 long.

I will set up a small production unit to do the track plates and what ever lurks underneath will be hidden from view. I have found some miniture roller chain with .125 centers and a half dozen sprockets of different numbers of teeth, that might work.

All of this is aways down the road, right now I have to concern my self with a couple hundred rivets, real and simulated. Unlike some people on this forum, I like rivets wink

 

Jim

 

 

 



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cpljimmy


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MK1 Nut wrote:

Chain sizes.. well reminded... found these people when I was on a internet hunting session... Motion Industrial Products.

They give few measurements, but list manufacturers of chain which can then be looked up on the net. It does though give some images of some very interesting shape links.

 Thanks again, I've been a Prototype Fabricator in Silicon Valley for 4 decades and I know what it takes to produce the prints you did and thanks for doing some of my homework for me.

 

Jim



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MK1 Nut


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Hi Jim, I will be adding a few updates on the plan page in the next few days... nothing major, just things I've noticed when working on a 3D CAD model.

H x

 



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cpljimmy


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mk 1 001.JPGmk 1 003.JPG

I was able to get some work done and figure some things out. Most of the rivets will be real and the rest will be simulated. I like to use a punch instead of a drill for holes, some time drilling by hand the drill can wander

no



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TinCanTadpole


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Jim, before you go any further, are you sure you have the profile right? I believe the flat on the bottom should be a good bit shorter, ending somewhere near the secondary gear bearing cap positions that you have drawn on. I would also double check the height of the sprocket, although it may be fine.

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cpljimmy


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I appreciate your comment, and you are correct. Everything I do is for sale, I dont want to try and explain to someone not knowledgeable why the tank is rocking. If I were keeping it, it would have the proper curve on the bottom.

I know it's kind of a convoluted answer. My interest in my projects lasts just about long as it takes to finish them, then they turn into  something else to dust.

Jim

 

 



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TinCanTadpole


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Fair enough. Your R-R armoured car is a fine model, so I expect we'll all be equally impressed with this Mk I.

Happy riveting!

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cpljimmy


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Howdy, thanks again, I'm in a grey area, between a sheetmetal sculpture and a scale model. This is the first project I've done with real drawings to follow. The Rolls Royce is slightly longer and narrower than in real life and that's what I was after.

I did spend some time with files this morning and made some subtle changes to the angles. A second pair of eyes is always helpful biggrin

Jim



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cpljimmy wrote:

...My interest in my projects lasts just about long as it takes to finish them, then they turn into  something else to dust.

Jim 



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cpljimmy


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I've made a little progress on the MK1, I realized I cut the opening for the sponsons too deep and fixed that. While working on the rear bulkhead I realized the material and the rivets would not be to scale, almost,but I'm continuing on.



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TinCanTadpole


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Looks good, should be great when you get the rivets done for the sides as well.

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