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3D M72 Project


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#31 Pete Swede

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Posted 24 November 2013 - 06:07 PM

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Wow!  Those transmissions 3D views are worth their weight in gold!
Imagine animated versions that show how the shifting mechanisms work...
~R

Yes it's a goldmine... The more we can help him the more gold we get...

#32 Duke of Ural

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Posted 24 November 2013 - 06:41 PM

Amazing! I've never seen anything like this before!

#33 ourmaninshanghai

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Posted 29 November 2013 - 10:28 AM

View PostPete Swede, on 23 November 2013 - 12:40 PM, said:

Quote

What year had the square frame upright in this image? I've only ever seen round and half round profile for this?

He don't own an M72 and he told me that the reason he choose this bike was that it was easy to find blueprints for it... It's not easy to get everything right straight away, just by looking at the blueprints... I think with a little help from the "foilhat society" it will be very good in the end. :biggrin:

Wasn't knocking it. I'm interested where it came from. It could be correct for a very early bike. BMW R71 had no upright originally. Not sure if it was added by BMW before the blue prints went to Russia or not. I'm not certain but I don't think the upright was added by BMW until after the war. Maybe the Russians added the square box section upright on the early M72, where there was no upright on the drawing?

Or your mate could have made a mistake of course! :)

#34 Pete Swede

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Posted 30 November 2013 - 02:11 PM

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Wasn't knocking it. I'm interested where it came from. It could be correct for a very early bike. BMW R71 had no upright originally. Not sure if it was added by BMW before the blue prints went to Russia or not. I'm not certain but I don't think the upright was added by BMW until after the war. Maybe the Russians added the square box section upright on the early M72, where there was no upright on the drawing?

I'm very interested in this... When I look at pics of BMW R71:s on the net, some have it and some don't. But that really doesn't say anything about reality since most of the R71:s are replicas or pure fakes. If you get any info about this and the early M72:s please post it.

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Or your mate could have made a mistake of course! :)

I'm sure there are lots of room for mistakes, specially if you don't know the bike and you make everything from scratch only using the blueprints.

That's why I'm trying to help him. If he agrees that I can use pictures on an M72-R71-CJ site in the future, that would bee very good for all of us...

#35 ourmaninshanghai

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Posted 01 December 2013 - 09:03 AM

^ Yeah good call Pete. Well worth supporting him with this, it's a great resource.

re the frames. All pre war BMW plunger frames (not just R71, but R51, R61 and R66) started off like the R5 rigid with no upright in front of the rear wheel or brace under the backbone. I'm not sure when they were added, but I think during or after the war. So I guess some early M72's were built without these features also.

Can you find out exactly what the blueprint your friend has specifies? It could give us the answer if it happens to be the original blueprint.

#36 Pete Swede

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Posted 04 December 2013 - 05:03 PM

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re the frames. All pre war BMW plunger frames (not just R71, but R51, R61 and R66) started off like the R5 rigid with no upright in front of the rear wheel or brace under the backbone. I'm not sure when they were added, but I think during or after the war. So I guess some early M72's were built without these features also.

Nice to know...! I'm at my girfriends house (in Uppsala) 270km south of my place (Mora) now, and I recall that I have some comparison pics on M72-R71-CJ frames that I got from B-Cozz some years ago... Will post them when I get back after New Year...

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Can you find out exactly what the blueprint your friend has specifies? It could give us the answer if it happens to be the original blueprint.

Will see what info I can get from him...


Still need some pictures with metric measurments, with the ignition parts on "square paper" (or what it's called in English), with lines drawn, telling how big/small it is... See the pictures earlier in the thread...

I have a very good feeling about this...

#37 ourmaninshanghai

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Posted 08 December 2013 - 09:38 AM

Hi Pete,

There's a good post-war frame comparison on Chang Jiang unlimited, here: http://www.changjian...com/tb2086.htm.

Russian frame and German frame are very hard to tell apart (ignoring the gussets at the rear corners). Chang frames have a heavy oval rear frame rail from under the seat to the plunger instead of the oval to round profile originally used.

Sorry I can't help with the ignition parts.

#38 Pete Swede

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Posted 08 December 2013 - 09:58 AM

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There's a good post-war frame comparison on Chang Jiang unlimited, here: http://www.changjian...com/tb2086.htm.

Get a 404 Error mess on that link... :(

#39 Mike Goldthorpe

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Posted 08 December 2013 - 04:27 PM

View PostPete Swede, on 08 December 2013 - 09:58 AM, said:

Quote

There's a good post-war frame comparison on Chang Jiang unlimited, here: http://www.changjian...com/tb2086.htm.

Get a 404 Error mess on that link... :(
Oddly, so did I, but getting there via changjiangunlimited.com showed me it exists still.  Got to CJU, it's in the toolbox section.  You'll have to scroll down some.

Edit - or get rid of the full stop (.) at the end of the link.  Works fine then :-)

#40 Pete Swede

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Posted 09 December 2013 - 03:45 AM

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Edit - or get rid of the full stop (.) at the end of the link.  Works fine then :-)

Seems it was "One Dot To Far"...

This one works:
http://www.changjian....com/tb2086.htm

#41 ourmaninshanghai

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Posted 09 December 2013 - 08:21 AM

aah sorry bout that chaps!

#42 Pete Swede

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Posted 18 December 2013 - 06:13 PM

Test renderings of almost complete engine... Colors and materials are not so important in this stage.

Enjoy :P

Posted Image

Posted Image

#43 Pete Swede

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Posted 18 December 2013 - 06:14 PM

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#44 Pete Swede

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Posted 18 December 2013 - 06:17 PM

Still no ignition parts... Need help...!!! :(

#45 Pete Swede

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Posted 03 February 2014 - 04:59 AM

So I ended up taking the ignition of Nikita and put it on the mail for my friend since I think this is way to important to let slip trough my fingers... :wub:

So here are the first test renderings of Nikitas ignition parts...


Posted Image

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:m72rocks:




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