2017.03.14

Hello Paul, Steve Carlisle, Dragan Ristic et al,

the P+W Rotary Engine may be based more or less on the layout / technology developed by
C-W + John Deere ...

The patents filed last year by P+W are dealing with aircraft themes - so I
guess that their [rotary] engines may be "ready to use" ... (?)

Here's a long list of the [P&W rotary] patents filed in 2016 ...

All filed on 2016-08-04 ...
Wo2017024394
Engine assembly with combined engine + cooling exhaust (for APU)

Wo2017024393
Turboprop engine assembly with combined engine + cooling exhaust
(see enclosed file)

Wo2017024392
Aircraft heating assembly with liquid cooled internal combustion engine +
heating element using waste heat

Wo2017024391
Auxiliary power unit with variable speed ratio

Wo2017024390
Auxiliary power unit with combined cooling of generator

Wo2017024389
Auxiliary power unit with electrically driven compressor

Now the ones filed 2016-06-20 ...

Wo2016205934
Compound engine assembly with direct drive of generator

Wo2016205933
Auxiliary power unit with excess air recovery

Wo2016205932
Auxiliary power unit with intercooler

Wo2016205931
Compound engine assembly with bleed air

And patents filed on 2016-02-19 ...

Wo2016131156
Compound engine assembly with modulated flow

Wo2016131155
Compound engine assembly with inlet lip anti-icing

Wo2016131154
Compound engine assembly with confined fire zone

Wo2016131153
Compound engine assembly with offset turbine shaft, engine shaft + inlet
duct

Wo2016131151
Compound engine assembly with common inlet

Wo2016131150
Engine intake assembly with selector valve

Wo2016131149
Compound engine assembly with coaxial compressor + offset turbine section

Wo2016131148
Compound engine assembly with mount cage

Wo2016131144
Engine assembly with modular compressor + turbine

Wo2016131143
Compound engine assembly with cantilevered compressor + turbine

There may be more patents with "US..." or "EP..."

I think, Pratt+Whitney is a "big player" in the aero market + their
engagement is no fake / joke ...

With kindest regards

Franky / Frank Herfert

Frankie,
Certainly doesn't look like a joke to me. They seem pretty serious about it. This is what many of us have been talking about, using the rotary in a high speed application. They are set up with forced air cooling for ground operation and I would suggest a clutched engagement to lessen drag once at altitude. Very interesting article/patent.
Bill Jepson

What is really significant is all the R&D P&W Canada is doing on the rotary.
Apparently they agree with me that the rotary is a viable replacement  for the PT6.
Half the weight, 1/3rd the cost and less fuel burn in the bargain. They are trying to build
what is known as a patent firewall. Either to protect their rotary product if and when it appears
or to prevent a competitor (Possibly GE that now owns the czech copy of the PT6) from
introducing a rotary.

You notice nobody (other than us) in the aviation press is talking about all the patents P&W Canada are
obtaining on Wankel improvements.

As I said before the Wankel engine is now the aviation engine of choice. Even Rolls Royce is obtaining
patents on Wankel engines in turbo fans.

Paul Lamar

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