The internal housing shape is like a vane style hydraulic pump.
These pumps
have a tendency to develop chatter marks on the internal housing. The
engine would have to run at a higher RPM with heavier vanes than a
hydraulic pumps parts. I believe the engine will develop chatter
marks
quickly, requiring frequent overhauls with a need to replace the
housings
every time at a high cost to the owner. Re read Kenichi's
practical rotary
engine requirements. It does make a rotating motion as (1)
describes but
the heavy vanes ruins the practicality.
Dale Davies
Hi!: the inventor doesn't report any chattered marks, and says having
beenusing his
motorcycle with the engine for near 60'000 miles.SAE paper 630282 by F
Sisto 'Comparison
of some rotary piston engines',includes the vane-pump style RCe in his
list, I understand
that as the videos are in French language it may be a problem for you, but
probably
somebody from the French speaking regions of Canada may help you.
Regards, salut +
Jose G-A
Likely Dale is just guessing, right Dale?
The chatter marks in the Wankel are a result of the needed gearing for
proper piston orientation, any play in the gearing causes chatter marks.
The presented engine concept has no gearing, hence no chatter marks similar
to vane pumps.
Rolf Pfeiffer
Wankel chatter marks.
http://www.rotaryeng.net/**history.html<
http://www.rotaryeng.net/history.html
You don't get chatter marks with silicon nitride apex seals.
Paul Lamar
Yes. That is because the silicon nitrade seals are light having very little
inertia. The force they generate is not high enough to penetrate the
trochoide surface. (The force is their vibrational acceleration times their
mass and they hardly bounce having next to no vibrational distance.)
Also, that steel does not make a good apex seal material I would agree
with. Too heavy and mainly too elastic which is their more detrimental
feature.
Rolf
That is not what Mazda said in this official history of the apex seal.
Friction is a strong factor. I will agree the modulus of elasticity
of the wear surface is a factor. Steel being 3 times stiffer than
aluminum.
http://www.rotaryeng.net/history.html
Paul Lamar