Yes. Interesting. With the rotor stationary and the housing rotating
Uh say that again! Rotating the housing with the e-shaft stationary?
Royce
you don't have the centrifugal rotor bearing load limitation. I
wonder
if the SCCA would buy that engine? :-) Imagine! Five times the HP
in the same size engine. Boggles the mind.
Its in Kenichi Yamamotos book Rotary Engine. I'll scan it when I get
a chance.
Paul Lamar
Uh say that again! Rotating the housing with the e-shaft stationary?
Royce
There is an animation on that site. Log on and take a look.
http://www.der-wankelmotor.de/Wankelmotor/wankelmotor.html
Paul Lamar
That is cool. I'll bet a turboed 3 rotor could win Reno easily running
in that configuration.
Chris
microcosman.com
YES - That is indeed "cool". Now that version is a true rotary, and would
not require any
counterbalances. The tip seals would have a constant centrifugal loading,
and rpm structural
loading limits would be pushed up. However the sealing and induction system
must
be rather complex, and would be the probable limiting items. Also, there is
no reason
to expect the power per envelope to be significantly different than the
current
configuration. - Vance J
Let me get this straight.
A two bladed prop is a "true" rotary prop but a one bladed prop
with counter weight is not a "true" rotary prop?
A World War I rotary radial piston engine is a "true" rotary engine with
oscillating connecting rods but a Mazda rotary with absolutely
nothing oscillating or reciprocating yet it has counter weights
is not a "true" rotary engine?
A two rotor Mazda rotary engine has counter weights
and is not a "true" rotary engine but a four rotor Mazda
engine requires no counter weights and is a "true"
rotary engine?
New World Dict... "rotary"... of, or having the nature of, rotation.
Last time I checked the formula for HP was (RPM X TORQUE)/5252.
All other things being equal why would I not have five times
the HP if I had five times the RPM with the same torque... read
displacement?
Me thinks Vance, your subconscious perverse love affair with the
piston engine has clouded your vision when it comes to all things
rotary engine. Not to worry folks. Vance and I are close friends
face to face. He lives in my neighborhood roughly speaking.
We have agreed to disagree on this subject :-)
Paul Lamar
******************************************************************
By Kenichi Yamamoto from his book "Rotary Engine" 1981
1.3 REQUIREMENTS FOR A PRACTICAL ROTARY ENGINE
Although various types of rotary engines have been
developed to date, there are few that do not qualify as internal
combustion engines or do not qualify as a practical engine even
if they satisfy the qualifications of an internal combustion
engine.
The requirements for a rotary engine to be qualified
as a practical internal combustion engine can be summed up in
the following five items. The practicality of various ideas on
rotary engines can be judged by evaluating them by these
criteria:
(1) Every moving part, including the timing mechanism, should
make a rotating motion. A mechanism having a reciprocating
inertia will increase mechanical noise and vibration, and will
work against high speed and high revolution. Accordingly,
structures that require intake and exhaust valves and
mechanisms using the rotors oscillatory motion are not
desirable.
(2) Gas seals or the working chamber should be three
dimensionally reliable. The gas seal mechanism of a rotary
engine should be constituted by connecting the individual seals
three dimensionally. Among the many ideas we come across are
those that don't show such three dimensional thoughts.
(3) Appropriate gas exchange of intake and exhaust should
take place. Together with having a mechanism that can correctly
open and close the ports, sufficient time for intake and exhaust
should be provided especially for high speed and high
revolution. Among the ideas on rotary engines, there are some
that ignore this point.
(4) Every component part should have the strength to endure
high speed and high pressure. As the component parts are
exposed to high pressure, high sliding velocity and high heat
load, every part should have sufficient allowance in size and in
shape.
(5) Sufficient cooling and lubrication should be provided.
In order to qualify as an internal combustion engine, although
this is related to above (4), durability against high heat load,
high sliding velocity, etc. are required. Therefore, the
structure should be simple, and the ideas on rotor cooling,
lubrication of seal parts, and oil seal structure should be
those that are given adequate thought.
Also, it is desirable for a practical rotary engine to
have a simple and compact structure. When we evaluate the
various type's of rotary engines devised to date in view of the
above mentioned requirements, the NSU Wankel type rotary engine
is the engine that best satisfies the above mentioned
requirements.
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