Eric:

 you might want to talk a little about your patent for charge-cooled
 engine manufacture.

 best,

 George W


George W,

Per your request for discussion on Charge Cooling I can provide the
following input.

Charge cooling has certain advantages in a rotary engine a couple examples
below:

    lower Part Count
    No oil cooling system

Charge Cooling also presents some disadvantages a couple below:

    Running lean and or efficient can cause extreme internal heat and
effect the bearing life.
    Certain areas of RPM and load have a charge temperature "problem"
whereas the incoming air/fuel mix does not overcome the heat dissipated from
combustion into the rotor and thus the rotor bearing.
    Charge cooled engines use needle roller bearings and the
manufacturing for such and the requirements as it relates to tolerances and
finishes are very critical. (as Paul once talked about on this site how
Norton was hand fitting each bearing)

In our experience to date we determined that a charge cooled engine is not
the best method for universal use of a rotary engine, and more importantly
use in high power applications, or in highly efficient or emission friendly
engines. Our conclusion would be to change the rotor cooling before
production so as to address the ability to have a universal engine design
(as it relates to rotor cooling) and also have the ability to run lean and
efficient without having a potential internal heat problem.

Lastly the use of fuels like propane and natural gas does not provide as
much cooling capacity in a charge cooled engine as a liquid fuel like
gasoline resulting to limit the operation of an engine to a few RPM and load
settings.


Eric Barger

Bravo Eric. That was an expensive lesson.

Paul Lamar