Porsche 917

[Tin Falcon]

just hang a piece of plexi (oversize as the clams may leave a mark. ) off the oven rack with a couple of spring paper clamps when heated lay it on your form.
You may be able to form it right into the body just mold it with clear resin. Although you may need a vacuum chamber to keep all the bubbles out.
Tin
Nice bike by the way

 

[lee9966]

If not so then you might be the problem.

Ouch! Sorry if I offended in some way. I have an opportunity to start using Solidworks, and I was hoping to aspire to such nice work some day.

 

[dsquire]

LeeScrounger

I don't believe that you offended rhb. I think that a part of the problem comes from the translation to english which is not his native language.

I believe what he meant was that it is not important what the name of the program is. It is the results of the program that count. If you have the best program in the world and don't know how to use it to best advantage then you get bad results and the problem is with the operator and not the program.

I hope that this helps and I am sure that rhb will correct me if I am wrong on this.

I find that this is a fantastic thread and look forward to every new bit of information that is posted. I have watched every video on rebuilding the Porsche 917 and find them very interesting. :bow: :bow:

Cheers

Don

 

[rhb]

LeeScrounger
I hope that this helps and I am sure that rhb will correct me if I am wrong on this.
Don

Thanks Don. That's indeed what I was trying to say. To me it's an always returning question. To my opinion it's not the program but the man behind it. Because from most of the programs the results are interchangable and it must be because that's why thay are called 3D programs.
The big difference is the presentation of the output. You can go for a quick simple printout or choose for photographic quality with hours of rendering time.
Speaking for myself. Drawing 3D isn't more complicated than 2D but you have to practice. What is more complicated is finding the tricks you have to perform to get the photographic quality.
The choice of a program for use at home is mostly driven by the need of it's output. Example : If one has a CNC machine or if one wanted to make a well dimensioned drawing then SolidWorks or Inventor might be an option. If you not intended to use a drawing at all but only make yourself photographic output than 3Dstudio Max is a possibility.
I don't say that SolidWorks can't produce the same results as 3dsMax and the other way around. But getting there is only a little more complicated. You can't compare apples and pears just eat the one you like most.
Sorry I skipped the names of a lot of good 3D programs but I'm not in the advertising business.

I have an opportunity to start using Solidworks, and I was hoping to aspire to such nice work some day.

Welcome to the digital 3D world. I can only say be persistant to get the results you want.


regards Rijk

 

[rhb]

OK now back to business

Some other remarks
I was contacted by several people to share the CAD drawings of the frame. As long one has a good story I’m willing to share because the frame is no secret at all. There was a person who like to make some calculation on the frame with the finite element method. Then there was a person who wanted to use it for rapid prototyping. The top of it all was a person who wanted to build a 1 to 1 model and when finished use it for racing.

 

[gbritnell]

Rijk,
I have been following this thread since you started it. Needless to say, the work you're doing is very impressive.
Miniaturizing parts is one thing, getting them to work is another. As you have stated in your last posting there are certain engineering designs that will work on something larger but can't be done practically in a small scale. For stationary running you could always use a small electric fan to cool the oil but that would take away from the aesthetics of the project. There is also the problem with fuel delivery that you mentioned. I'm sure you have visited modeling sites over time and have seen the adaptations people have used to to get their miniature engine to work. I for one have run into these problems and have had to solve them within my own capabilities and resources. Some people that get into this hobby come from an engineering background and have more knowledge to solve some of the miniaturization problems. Still others have some very sophisticated tooling at their disposal.
In the end most people who have been at this hobby for some time accept the work arounds that are required to complete a project and don't even question the builder's alternative methods.
From what I've seen so far I'm more than confident that I will be 'blown away' by the finished project.
Keep up the great work.
George

 

[rhb]

One day most of the drawings are ready

 

[T70MkIII]

Thanks for the pictures of your metalwork to get to this point, Rijk. Really nice work. Please keep the build shots coming, as well as your 3D drawings.

 

[lee9966]

That is some fantastic work, I really am enjoying your thread. To realize how small those parts are would it be possible to have a ruler or something in the future pictures?

 

[rhb]

As told before the engine is air cooled. This made a simple modular design possible. The 12 cylinders are all individual pieces which can be changed relatively easily.
I

 

[rhb]

It took some time to reassemble the complete cranck.

 

[Optimusglen]

Remarkable work. I am excited to follow this build as it progresses.

I was reading about the 917's recently and saw that the chassis bars on these are joined together so that the hollow cavities intersect with each other to form what is essentially a large air chamber. Then before the race the chassis "air chamber" is charged with dry nitrogen. The mechanics would monitor the pressurized system, if there was a pressure drop it would mean there was a crack or fracture, indicating a weakened chassis.

Have fun with your project!

 

[rhb]

I was reading about the 917's recently and saw that the chassis bars on these are joined together so that the hollow cavities intersect with each other to form what is essentially a large air chamber. Then before the race the chassis "air chamber" is charged with dry nitrogen. The mechanics would monitor the pressurized system, if there was a pressure drop it would mean there was a crack or fracture, indicating a weakened chassis.

This story goes round and round but in the real world things were not that simple. There was a big influence of the environmetal temperature and air pressure which made longtime readings inaccurate. The big holes were detect easily but the small ones were still hard to find.

mvgrijk