CAD file compatibility.

Perhaps you were running Q cad on windows. On Linux it has
no such problems but of course 3D Rhino is head and shoulders
above any 2D cad program.


Paul Lamar

Planning on a one rotor, an O-200 would be 220# and 100hp, I figure a
single
rotor p-port about the same but 125hp.
Some have been built in SA with O-320's but it kills the performance by
adding too much weight.

No cowl. The dimensions are determined by the tubing location at the front
of the fuselage which I am widening by 4".
There is no firewall shown in the plans, in fact there is nothing FWF at
all. The first page has the typically 3 perspective views and the builder
is
on his own. From those views the firewall is very slightly oval 26 1/2"
tall
and 31" wide (incl my 4").
Could you send an existing simple design that I can play with in Rhino ?

John

I will see what I can come up small enough to email.
Most of the native Rhino files are real big.

Paul Lamar

Paul, what are the 3D rhino file extensions, I would like to figure out
what is compatible with Alibre Design.
I'm in for in for a pair of bushing holders and 4 mount pads if you have
those made as well.
Thanks, C. Smith

The native Rhino file extensions for my version is 3dm but it does dxf,
stp,
iges, stl to mention just the popular ones. There are about a dozen others.


I have never heard of. What can Alibre import?

Paul Lamar

2D:DWG, DXF, 3D:IGES - SAT - STEP - SolidWorks,

C. Smith

Chris S,     After many disappointments trying to export into other CAD
systems I might have a few suggestions. I havent found much difficulty in
transferring  .stl (steriolitography) files, however they are not able to be
edited (modified or dimentioned) since hey a a mesh file of the surfaces of
a solid. They import into CAM programs to make G code for CNC.  Everybody
lists  .dwg files which are native autocad. 2D drawings to import into older
cad programs but balk on the newer releases. The .dwg files that are 3D
solids are actually aski II files and don't import. To move .dwg files
export them as .dxf  blocks, then "explode"  them  back into the second cad
system to save as their native file extension. I have exported  .dxf
drawings into Rhino V1.1 and saved them as .3dm the rhino native file type
then imported the  .3dm into Rhino V4.  As for solid works their file
extensions are their on native types. A file has several parts stored under
3 different file extensions. This is due to the "tree" system of  storing
files off screen in another file and the interconnectivity to networked
computers working on the same project.  The original Catia which solid works
came from conceptiomally  (like linux has roots in unix)  has the same tree
system of file branches. Solidworks 2006 will import autocad. I installed an
evaluation version and it converted all the autocad files  stored on the
hard drive to solid works  files when I installed it. (good thing I had back
up files).
        In general backwards compatability doesn't exist.  I can't open
Rhino V4  into Rhino V1.1   or autocad 14 files with autocad 12 as examples.
I tested a student version of autocad 2010 while my wife was a college
professor and had problems with forward  compatibility from autocad 14.  The
problems seemed related to boolian joined solid parts.    In order to
transfer files they need to be saved in the format AND VERSION NUMBER of the
system you will import into.  I am not aware of version numbers on  .dxf
file extensions and possibly there is only one version.
        If you know which of the two types of systems you are using that is
a hint of the level of difficulty you can expect.  If you have something
based on the autocad functionality it  is based on lines, polylines, and
serpentine lines. polylines are joined pieces of arcs and straight lines.
Serpentine lines are fitted beween some points with mathematical algorithms
which are functionally the same as nurbs curves which Rhino and solid works
use.  They are  represented as  aX cubed+bXsquared+cX+d and classified as
the degree of the highest element. degree 3 in this example. Polylines look
like serpentine lines with the difference being they must pass thru each
point not just near them.  These two systems are like oil and water.

george grimes