Subject: Motor Mount design in general.
From: Rotary Engine
Date: 4/25/2006, 2:06 PM
To: AAme


>> Paul,
>> I know of two programs that are free and appear to be
>> fairly simple to use.  >
>
>>
>> The other is a Java applet that can be found here:
>> http://engineering.ipfox.com/
>>
>> Aubrey
>
>
> This one requires a plugin and my Linux version of
> FireFox cannot find it so it won't run on Linux.
> I would never connect my Windows computer to the Internet
> for virus reasons so I guess running this one is out
> of the question.
>
> Paul Lamar ...No rotor no motor.

Paul,
The unzipped files are fairly small.  I'll attach a folder containing
them.  You should be able to transfer this folder to your Windows
computer via a flash drive.  Double click the IE html file and it should
run.  Well, it would not let me attach the folder, but here are the
files.  Put them into a folder named "FEM3D" then the FEM.html file
should run.
Aubrey


I have them. I downloaded them. When I tried to run them
in Firefox it still required the plug in. I suspect if I moved them over
to the Windows computer and ran IE I would also require the plug
in. The only way to get the IE plug in as far as I know is
connect the windows computer to the Internet and down load
the IE plug in.  I would then have to set up the windows
computer to connect to the WWW and download the plug in.
Too much trouble.

I would rather focus on the Dutch program if you don't
mind. Besides I think it accepts DXF files while Bob says
it is hard to enter space frames into the Java ap.

However if you find it easy to use we will accept you as
the official space frame analyzer :)

There are some strange CCI motor mounts out there that
need analyzing that I am kind of curious about.

BTW I think Solid Works is moving in the right direction
integrating FEA with the CAD 3D program. Too bad the SW
user interface is not as easy to learn as Rhino.
Rhino has a ways to go to equal the Solid Works
capability but there appears to be a competition going
on there.

Paul Lamar ...No rotor no motor.



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.

-- 
http://www.bob-white.com
N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
Custom Cables for your rotary installation -
http://www.roblinphoto.com/shop/

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.

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