Hi Paul,

Has anyone any experience with converting a rotary to steam??

I'm working with a guy who is building a Pietenpol and has built a 3
cylinder radial steam engine for it. He is a 'traditional' guy and
whenever I bring up the subject of the Wankel rotary i get subjected
to a barrage of abuse and negativity. (It wont breathe, the apex
seals will melt, etc, etc).

Does anyone have any Ammo I can fire back?? Studies done??

Thanks, Russ Ward


The rotary would make a fine steam engine. Every third revolution
inject water and not gasoline. Eliminates the cooling system as well.
Patent applied for.

Paul Lamar


I wonder if such an engine would be practical. Would water evaporate
that fast? We are talking about a few thousand RPM


GAO, Gordon

It has been tested in a piston engine.

"The six-stroke engine is a type of internal combustion engine based
on the four-stroke engine Four-stroke_engine, but with additional
complexity intended to make it more efficient and reduce emissions.
Two types of six-stroke engine have been developed since the 1890s:"

"The pistons in this type of six-stroke engine go up and down three
times for each injection of fuel. There are two power strokes: one
with fuel, the other with steam. The currently notable designs in
this class are the Crower six-stroke engine invented by Bruce Crower
of the U.S.; the Bajulaz engine by the Bajulaz S.A. company of
Switzerland; the Velozeta Six-stroke engine built by the College of
Engineering, at Trivandrum in India; and the NIYKADO Six Stroke
Engine invented by Chanayil Cleetus Anil, NIYKADO Motors, India under
patent number IN252642 granted on 25 May 2012."

http://en.wikipedia.org/wiki/Six-stroke_engine


It is a form of turbo compounding as the otherwise waste cooling heat
is used to vaporize the water and turn it into steam.

"The enthalpy of vaporization is the energy required to turn water
into the gaseous form when it increases in volume by 1,600 times at
standard temperature and pressure; this change in volume can be
converted into mechanical work in a piston engine and in steam
turbines."

http://en.wikipedia.org/wiki/Steam

Paul Lamar

It sounds to my possibly ignorant mind that water injected between
the exhaust port and the DD15 (?) turbine might be a good location.
It should be fairly simple to implement, cool the exhaust gas for the
blades and increase the gas flow through the turbine. I believe some
one might have suggested steam erosion of the blades would be an
issue but that should apply no matter where the water goes in.

John Gibbons

I guess one of the first Rotary engines, the design by Umpleby, that
is currently in exhibition somewhere in the UK, was based in the
Rotary Steam machine by Cooley. Attached images are from the Kenichi
Yamamoto book: 'Rotary Engine', 1981 edition, that is available on
the web. Good weekend, best regards.

Salut Jose Gros-Aymerich Madrid,
Spain


Russ,

Just send your co-worker to Paul's site!! If that doesn't clear things up
for him, you're wasting your time!

Dan G.


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