Paul and George

There is a part design of shaft with detachable flange who can be
built with
splines with the shaft and threaded nut to secure the flange and the
bearing
the nut can be lock with flat head screw true the flange or outher
ring with
splines

Jean Prudhomme

Send me a sketch, dwg or jpg.

Paul Lamar @ Aero

DWG jpg

Jean

How does the 3.5 inch dia. carbon fiber prop shaft connect to
this part?

Paul Lamar


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Paul

There is the way of the propshaft will attache to the 3.500"ID X .180"
wall thichness,i found a double side trust sealed ball bearing and
Mark Williams have a 45mm deepgrooved double ball bearing but i can
use their number to find the 50mmx90mmx32.1mm.

To use the carbon tubing i have to go with the 5"od x.250 wall alum
tubing reinforced with 1/4" gusset.

On the flange attachement on back of the bearing housing have to be
beeffy up more then 1/2" thichness
I will redesign in 3D after i finish to figure it out all dimensions.

I still in contact with Mark Veldhuis of PST inc.

Jean Prudhomme

That looks pretty good. Look into helicopter or thin section
bearings.

Paul Lamar @ Aero

Hi Jean;
It sounds like you plan to have carbon and aluminum tubes in direct
contact - carbon eats aluminum through galvanic action. You will want
an insulating layer between them. I have heard a single layer of glass
will work from several sources, but no solid numbers to back that up.
The layup schedule, helical angle and epoxy for the carbon tubing and
method of attachment are also important factors.
There are AL structural bonding processes.

You might also look at the damper used for the Cirrus VK-30 driveshaft
installation.

Cheers
Cary

The shaft is made with steel and bonded to
carbon tubing no carbon fiber is in contact
with aluminum,if you look my dwg it show clearly
how i am doing the shaft and wet aluminum shaft
housing with bearings and seals

Jean Prudhomme
Jean
Do you plan to have the tube weldment stress relieved and then heat treat
to get back strength?  What is weight of this assembly?
Dan F

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