George Lendich wrote:
East Coast Rotary Aviation and Auto Products wrote:
Does anyone know the specifics as to why racing beat abandoned the the
idea
of using an aluminum housing with a steel wear plate? Seems to me that it
would work well. Space-Age coatings work great until you get a small
scratch
in it.
Bruce Turrentine
I don't think Jim ever considered making them with the steel wear plate.
that was my idea. At least I think it was my idea. One can never be sure
unless one searches the patent office.
I think it would be ideal for a one rotor as one rotors have power to
weight
ratio problems due to extreme over design of end housings designed for
two rotor engines. Obviously you are thinking about that :-)
Bruce -Hope you do!!
Paul-see the new Radial engine to come out of Brisbane
I call it a Radial Rotary as it has only 3 spark plugs and the cylinders
rotate
around to them anticlockwise while the drive shaft rotates clockwise.
A simple light weight(water cooled) motor 100hp@3,000rpm Direct drive
and130hp@ 6,500 rpm with a PSRU.(nothing stunning there in the power output)
However a very simple motor.
Inventor claims that because of the simplicity of the engine, anyone can
pull it down in
a short time -also can be built in banks of 3 and 5 cylinders ie. stacked in
series.
Oh yes! - there are no valves.
Bill,
My engineer mate said his new engine was a lot simpler a true aircooled
rotary - I know I'm still waiting too !!
George (down under)
Good luck to him George. The patent office is full or rotary engines
like this. BTW IBM has a online patent search web site as I recall.
Right off the bat I see no provision for cooling the cylinders.
The other major problem I see right now is sealing the combustion chamber.
Nothing that a billion dollars and 30 years development cannot solve however :-)
Paul Lamar
That looks very similar to the 3 cyl engine I proposed to you in my everconstant
search for the "truth" :-) in displacement. Only mine was simpler, You said
that one wouldn't work either - Vance
Good luck to you too Vance:-)
In your case I see absolutely no provision for three dimensional sealing
of the combustion chamber what so ever. Not only that there is no
provision for cooling the outer jacket although it looks like it could
be added. Furthermore how are you going to seal
the rotating water chambers? Your pistons also reciprocate so in no
way is it a rotary engine at all.
Paul Lamar
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/ http://www.linux.org
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.
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/ http://www.linux.org
