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Posted by: root Oct 2 2007, 08:10 PM

I started drawing a 3D CAD image of the type 4 engine but it's a big effort to get the locations of threads, etc....

Anybody know if there's a 3D file (fairly accurate) out there somewhere?

My avatar is the crude start I have drawn so far!

Posted by: alpha434 Oct 2 2007, 08:30 PM

Find a local machine shop with a CMM. Use it to revere engineer key pieces. You can even make a drawing based on the data it collects right away.

Should cost 80 bucks/hour.

Posted by: root Oct 2 2007, 08:50 PM

I was kinda looking for a 'low-cost' answer. I'm building a motorcycle using the type 4 engine and 901 tranny and want to visualize and scale the project before the fun begins. There's some obviously questionable aspects to it! My budget is tiny so I'm seriously restricted on using state-o-art high tech $$$ technology. I have a friend who has access to a 2D coordinate measuring system but not 3D. I'll just keep on working it the old school way 'till something cheaper comes along!

Posted by: jimkelly Oct 2 2007, 10:14 PM

new pics

does that reach to the handle bars seem faaaaaaaaaaaaaaar to you : )

http://thekneeslider.com/archives/2005/11/08/supercharged-porsche-powered-motorcycle/

Posted by: Dr Evil Oct 3 2007, 09:17 AM

Right ON! But, I agree with Jim, ya aint that tall spanky. Maybe you should stick with a 1300 TI engine so you dont have to worry about weight, cooling, cost, etc. It should bolt up to a 901, right?

Posted by: root Oct 3 2007, 11:32 AM

That's why I need to 3D it first! I figure that's the best way to pre-determine the setup and my reach ability.

Length - Type 4 length front-to-back (without the fan housing) = 17".
901 front-to-back = 23". 17 + 23 = 40". If you stradle the 901 length is really not the question. So on length.

Weight - not a problem I need to loose a few anyway!

Cooling - I have a simple "top-secret" idea for cooling!

Cost - Now as for cost that's where we get to what I wanted to talk to you guys about..... donations anyone?

Posted by: root Oct 3 2007, 11:36 AM

Why isn't my new avatar working?
Here's my TIV CAD so far..... I know it needs lot's of work!


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Posted by: Brian Mifsud Oct 3 2007, 11:49 AM

I asked the same question last year. Nobody on the board has a cad model, or if they do, they ain't volunteering it.

When in doubt, buy a Type IV that needs rebuilding. You are gonna need it anyway. Measure and model. If you already have the true gross dimensions, you will already have the info you need to know if the engine is too big to work for what you want. Otherwise, get to it... if you don't have the money............

BTW... I like Solidworks and use it daily. If there are other users on the board, maybe we can share the modeling task and build up a library for the community's use???

I've got much of the '76 Smog System already modeled as well as other bits unrelated ('70 4/5 lug rear hub casting), etc.

Posted by: brer Oct 3 2007, 12:09 PM

I think you would have better luck finding original engineering schematics than a CAD model. Valid models are quite valuable.

I have a copy of the 36hp cylinder head plans and could produce a model from those easily. They did cost a few pennies though.

Aside from that I recommend that you befriend a student at a technology equipped university and have him map your parts in the middle of the night.

this is shot from my 1.7/1.8 project that is nearly finished. mapping was essential.
we've already cut the first samples, next is install.




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Posted by: SirAndy Oct 3 2007, 12:16 PM

oh the horror!


if you're going through all that trouble, the least you could do is to make it a metric model.
Andy

Posted by: brer Oct 3 2007, 01:13 PM

I have a 2 cylinder Citroen 45hp motor i can sell you.
shorter and lighter, still 4 stroke. New in the crate.

Posted by: scotty b Oct 3 2007, 07:09 PM

Yeah me too...GO FASTER !

Posted by: jimkelly Oct 3 2007, 08:37 PM

well - it seems reach for handle bars might not too bad after all - but i think i would want seat higher - jim

i say reverse engineer that bitch - i say mount trans to engine ( 1.8 single carbed ) and tack weld build the a mock frame under engine and get rear wheel mated orientated - then go from there - with rest of mock up. Once mock up complete - build nicer frame maybe with bent tubing - or not : )

as you can see - even this builder did his simpler one first - and THEN kicked it up a notch with rear suspenson/super charger/etc.



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Posted by: root Oct 3 2007, 08:56 PM

Alot of detail in that ride! Great for show but "chrome won't get you home".

My goal is to build a comfortable, long range tour bike. No frills just solidly built with a reasonable suspension under it!

The position of his leg and foot looks uncomfortable...... I'd still like to ride it around the block one or twice!

Posted by: root Oct 3 2007, 09:05 PM

So what is that image supposed to be anyway? Sorry but it doesn't make sense to me

Posted by: BahnBrenner914 Oct 3 2007, 10:06 PM

I'm up here at TriState University (a Mechanical Engineering major), and we have Pro-Engineer and I think we also have Solidworks, but I'm not familiar with it. I could make up CAD files from schematics/blueprints but my "free time" isnt free, and I'm poor, so I'd need some compensation.

Posted by: dlo914 Oct 4 2007, 12:14 AM

Found this while browsing www.kneeslider.com, pretty cool for you bike guys: http://thekneeslider.com/archives/2005/07/30/yamaha-paper-motorcycle-models/
similar to the paper cut out 914's.