> Larry Childs wrote:
 >> Paul,
 >> 600 ft lbs used simulating the previous test.
 >>  The high stress number in the graph on the side is an artifact
 > of
 >> how I install the simulated gear box to apply the loads. I have learned
 > over
 >> the years how to apply the loads and constraints in ways that are very
 >> representative of actual bolted interfaces. We may beef up the ribs a
 > little
 >> more or even add some external ribs for added strength.
 >> Jarrett, this is done using the cosmos express that comes with solid
 > works.
 >> Larry


 >Can I publish this Larry?

 >Paul

 >-Yes, you can publish, sorry I should have said so earlier....
 >The color won't go to all blue, as the program keeps the colors in for
 >visual aid, and the scale on the right will change to show the lower stress.
 >This has also been done with marginal strength material (poor casting) heat
 >treated to only T3, so this really represents worst case. The highest stress
 >in the entire model is in the part I used to simulate the gear box. I used a
 >5 inch OD tube with 3 inch ID as a rough guess as being stiffer than the
 >gearbox and propshaft. I am going to rerun the test with the inner diam down
 >at 2" before I do any more modifications. I will also re run the test at full
 >material strength. It will take most of today to complete, as each run takes
 >about 3 hours.
 >Larry


 >Here the initial FET's  are folks.

 >Paul Lamar

Hi Paul,

If it will help Larry to know dimensions of Tracy's g'box...at the mount
interface the ID=4.960, the OD=6.615, and the bolt circle =5.900

Since Larry's gone this far has he given any thought to including a
"snout" on the casting that could be simultaneously machined to
replicate Tracy's housing. One could then remove the internals from
Tracy's g'box and put them into the new bell housing. The only
complicated part of doing this is Tracy presses a bronze bearing about
midway in the housing that would probably not survive removal and
re installation. Otherwise, piece of cake, and you get a real nice,
although expensive, paperweight in the bargain. Perhaps Tracy would want
to come on board with this concept or even make the internal parts
available.      Dave M

I agree :)

Paul Lamar

Dave and Paul,
Being integral it may help with strength as well, but then again may
complicate machining.
George ( down under)


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