Paul,

  Have you been following the Norton NRV500/700 motorcycle news.
  They ran
  173mph at Bonneville in 2010 with this engine.

  http://www.asphaltandrubber.com/racing/norton-racing-nrv588-179-mph-
  bonneville-salt-flats-bub-week-part-2/

  I can't seem to find any specs on the engine anywhere.

  Mark S.

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

  This link may help. At the very bottom there is a little scoop
  about the
  Norton.
  One chamber has 588 cc as the name implies. A larger 700 cc
  chamber size
  is being planned.

  Rolf

  Rolf,

  Did you mean to state that the 588 was a 2-rotor? According to the
  link, the 588 is a 2-rotor.

  "Norton has used a Wankel engine in several models including the
  F1, F1 Sports, RC588, RCW588, NRS588, most notably Steve Hislop
  riding to various victories on Norton's F1 in the TT in 1992.
  *Norton now makes a 588cc twin-rotor model called the NRV588* and
  is in the process of making a 700cc version called the NRV700."

  Mark

  Marc

  The Norton Rotary has 588 cc displacement per chamber. That compares
  to 654 cc in the Mazda's, RX3 to RX8, they all have the same displacement
  per chamber.

  Norton started out with a single rotor and later build two rotor
  versions of the same basic design with 588 cc chamber size. The new
  NRV588 and NRV700 with 700 cc displacement per chamber are twin
  versions, as per the company statements.

  In other words the 588 is not far from the 654 Mazda is using.
  Perhaps for smaller hp needs a Norton 588 single could be used.
  Likely that would be simpler than reducing the Mazda to a single
  rotor version. Even the twin might be suitable for aircraft use.
  Paul probably has more insight into that.

  Rolf

  Rolf,

  The RX2 and RX3 engines were 1146 or 573 per chamber. The RX4, Cosmo
  and later
  engines; 654 per chamber. Early RX7's had 12A and then 13B engines.
  The 12A is
  closer to the Norton. What is the rotor radius, eccentricity, "a" and
  rotor
  width? Almost all the Mazda engines shared dimensions except the
  rotor width.

  Dale Davies

  Norton bike rotaries are 588 and 700 ccm total displacement, not per
  chamber. All including early air-cooled versions were 2-rotor. The new
  motor would be very pricey alone, even if it does become available, as
  production numbers will be very small for now. Being most motorcycles
  are of unit construction, that is motor, primary drive, and transmission
  sharing same castings splitting components may be a problem. I know
  where there sits a '90's F-1 sport bike version, but plastic would have
  to come off to find out. I see nothing but problems. Mazda motors are
  dime-a-dozen respectively.

  Sincerely,

  Al Koivisto

The March 2011 issue of "Motorcyclist" magazine has a short article and
pictures of 13B powered motorcycle built by one Rodney Aguiar. Mostly
BMW R1100Gs with Suzuki front suspension. 250 Hp makes it a apparent
handful. More info at <http://www.propulsionlab.com plus other off-the-wall creations.

Al Koivisto



Here is one seen at Seven Stock in 2006.

Paul Lamar