You are not going to believe this.

This makes an e-shaft cheap to manufacturer.

It takes a special right angle tool to drill the holes
but that can be done.

These lobes are made in quantity by an NC mill and then hardened and
ground.

Then they are merely bolted to the e-shaft at the correct orientation
for the number of rotors. Every 90 degrees for a 4 rotor.

This assumes 200 foot pounds of torque for each rotor.
A 4 rotor turbo engine would therefor have 800 foot pounds
of torque and 1218 HP at 8000 RPM. Right about what we
are getting per rotor on the Time To Climb engine.

The 2400 pound number shown is the average shear load. Peak shear
load would be about twice that. Each bolt takes half of the total shear load.

The 3/8 shoulder  bolts shown are 140,000 psi.
The shear area is .110 square inches.  Lets say each bolt has a shear
force of 2400 pounds. That means the bolt is capably of resisting
15,400 pounds. A huge factor of safety of six.

Each lobe is an I beam to cut weight.

I could get a patent on this but it would take years and cost a bunch
of money as well as defend it. I am donating this to the Wankel
community.

You cannot get a patent on this as I have already published it :-)

This also makes assembling  a  one piece e-shaft four rotor with 5 main bearings easy.
No unusual main bearings devices are required such as the Offenhouser device and method.
This also cuts the cost of the engine. You can build it up like stacking pancakes.

BTW Very few people realize the Mazda two rotor e-shaft is three pieces.
They are spin welded together. This could be spin welded as well but
some of the advantages would be lost. For example suppose one rotor
bearing was scoured from dirt in the oil. Just replace that lobe.

Paul Lamar


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