I'm only saying it was hard for ME! as I don't know what I'm doing.
What I was suggesting for the FEM3D was to run it directly with Java
i.e.  CD to the directory the files were unzipped to and use command
line 'java FEMFrame'.

It does sound like the other program has more potential.

Assuming you have java installed, you shouldn't have any problem using
java on Linux. In Firefox go to the menu Edit - Preferences - Web
Features then select 'Enable Java' and 'Enable JavaScript'.

Good luck with this.  I would like to see a 3D analysis of my motor
mount.

Bob W.

I have Java and I have Java script. Both are enabled. For
some strange reason they want you to download a plug in.
IMHO it appears it won't work without that plug in.
There is no version of that plug in that will run under Linux.

Your motor mount is fine Bob. It is very amenable to 2D simple
graphic analysis. No bending loads in any of the tubes.
All tubes are in pure tension or compression except for
the Schertz beam and that can be analyzed with a simple beam
formula.  All loads are applied at the juncture of three tubes
or at the firewall hard points.

Not so for the strange mounts that have bending loads in the
tubes. These are the problem. These require FEA. Here is an
example of what I am talking about.

Paul Lamar ...No rotor no motor.

That's odd.  I had no trouble running the program on the web and it
didn't complain about plug-ins.  I just couldn't get to all of the
input boxes.  They showed up fine running directly with Java instead
of using the browser.

I don't have any concerns about the motor mount, but I'm hoping to get
the DAR to sign off on the plane in a few weeks, and would like to have
a nicely printed analysis in the files.  3D is more impressive. :)  I've
ran thru the 2D analysis and got 1089 lbs compressive force, and 10,092
psi stress on the lower tube and 1013 lbs force, 9388 psi stress on the
upper tube. (I also bumped the engine weight to 350 lbs just to be sure
it was high enough.)  Do these numbers sound about right.  The lengths
involved are firewall height = 28 inches, length of upper tube = 27
inches, and length of lower tube = 29 inches.  Distance from firewall
to mount is calculated to be 24.2 inches.  Tubing is 3/4 inch .049
wall.  This is using the MM plate, not the Schertz beam.

Bob W.