Paul The part of Tracy uses is from Ford and i have one which
you can keep the front drum to secure your magnet and cut the
rear part by using the outer surface of the drum to secure with
rivets the same way Tracy did it.
The drum thickness is very low beside the facing rib .
I am sending you a photo it might help you on your project

Jean Prudhomme

Hey Jean thanks a bunch. I was wondering where that part came
from.

BTW I am thinking of setting up a high speed DC electric motor in
the lab to test these ideas.


Paul Lamar

Paul i do have an other idea with this piece it can be used
but we will have to machine the hub part ring between engine
flange and the crankshaft you know the small flange with the sun
gear shaft enter after the splines so we gain about 1/2" plus
the1/2"aluminum plate ,the one who is attached to the flywheel By
machining the small drum of the transmission part and rivet with
the spline hub part by the inner side exactly at the opposite
side of Tracy did install and you can use the big drum which is
6.610" ID with splines removed and machine all crap at the bottom
so you will have the right flywheel to install your magnets and
you still be able to drive the sun gear shaft

Jean Prudhomme

Thanks Jean. That sounds like that will work.
Do you have a sketch with dimensions? If so I will do a Rhino
3D.

Paul Lamar



Paul
I made a
quick sketch with few dimensions so you can work on Rhino,it give
you an idea of the possible set up for the magnet carrier

Let me know what you are thinking

Jean Prudhomme

OK Jean I'll draw this up to scale and see what we can come up
with.

-----------------------------------------------

This looks like it is going to work. Good idea Jean.
Drill out Tracy's rivets and re machine the same Ford part
Tracy uses. The magnets are only 1 inch wide so I changed
a dimension or two on your dwg.

Now all we need do is find magnets with the right curvature.
The junk yard magnets that I have are designed for a 6.4 inch
diameter drum and the Ford drum is 6.6". Looks like we need a
thin sleeve.

Paul Lamar

       
Paul you can grind the magnet side corner to suit the inside circumference and  by using the inner spline as alignment and machine the right position.
The magnet can be glue with the same glue they are using to fabricate and secure pads on car and truck brake lining.
Also using the inner spline will more secure the magnets and the rest can be machined.
I look on the small drum side which have to be remove but you can let a small part as alignment on Tracy plate


I forget to give you a dimension
on the outside small drum the groove deep behind splines is 4.860"

Jean Prudhomme    

I assumed you could not grind magnets with out affecting
their magnetic properties. Am I wrong?

Paul Lamar