Hi Paul, just going through the website for some info i needed, i saw
some of the links were dead under "interesting
rotary engine and other web site links" Specifically from the
top of that subheading, links 2,3 and 5,

Alex


Thanks Alex. Fixed.


Another fact finding visit with IMS  yesterday. All tubes have to be one
inch. Not just D and H. It will add a bit of weight but not much.
It will be a lot stronger.

IMS can read my iges files but Rhino 3 is having trouble with tubes.
I am ordering an up grade to Rhino 4.

The Rhino 4 should be here in a couple of days.
I showed IMS the steel straps and they had no problem with that.

As soon as I get Rhino 4 and get the tubes in separate iges files
I will get a formal quote.

Anybody with solid works out there that can fix a tube
problem?

I send an surface iges.

You load it in SW.

You save as iges solid.

Here is an example iges.

Paul Lamar

Your IGES file has problems coming into SW.  The cut faces are missing.
Is this the problems to which you are referring?  It is easy to fix.  Are
you trying to get files for laser cutting?

I would be glad to look at any or all parts of the mount.

Gary

Thanks Gary.

Yes that is the problem. Rhino can sometimes loft these and sometimes
it can not. Bug. This one is partially lofted ends. Still not a perfect
solid.

Yes files for laser cutting.

Can I send you about 8 for fixing.

Paul Lamar


-------------------------------------
Gary, please try this one. I think I have discovered a work around.
Rather tedious however.

Paul Lamar


---------------------------------------

Here is the work around. In case somebody out there is using Rhino.

For some strange reason the cutting object
must have Isocurve Density of zero. It defaults to one.
This is set in "Object Properties" under "Edit".
Don't ask me why. Apparently the Isocurve line(s) is(are) transferred
to the cut object and interferes with subsequent lofting.

If this is not done it sometimes is not possible to loft an
inner and outer surfaces of a tube. You won't read this anywhere
about Rhino :)

Here is the procedure: Construct a tube from one point (in side a cutting
object) to another point inside a cutting object.

Use trim to cut one end of the tube. Then explode the rest of
the tube. Then trim the other end. Then loft both ends. Then
join all the surfaces to make the final solid.

Do this for all tubes. It has taken me several days to figure this
out :) Maybe it is fixed in Rhino 4. I don't know yet.

This is the reason that I would use SW to create tubes.  They are easy to
cut using a surface created on the face the the adjoining tube.  After the
ends of the are cut, they can be exported as an IGES file, which, if
brought back into SW, will automatically form a solid again.


BTW Gary, did you ever work in car racing?

Paul Lamar

I was at Chaparral for several years and also McLaren. :-)

G

That is amazing. You were there just before me. Small world now.
You and I ought to co author a book. When did you leave McLaren?
Did you go to the Oxford World Motorsport Symposium in 2008?
Last time I saw Jim was at Phil Hill's funeral.
His son has a go cart track near me in Ventura.

Paul Lamar



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