Paul,

  If the 720 CID class is running about 700HP from the turbo O-
520/550  recips  and an eight with possible 1,000HP; Would the 3
rotor be  competative? The RB  engine at 900HP with Al end housings
should be lighter. When the  powers that  be governing Reno said
rotaries would be limited to three rotors,  was there  a
 stipulation they had to be Mazda dimensions? Just thinking.

  Dale Davies

  I don't have any details. It is just hearsay at this point.
  I think with the right gear box one could get 1000 HP from
  a turbo 3 rotor for 15 minutes. The Bell 47 final drive box might
  do it.
  The aircraft it is in must be available to the public as
  a 2 person aircraft so that pretty well limits the choice
  to a Nemesis Nxt.

  Paul Lamar.

  Lee (president of sport class) has opened rotaries to any number of
  rotars
  as long as you meet the cubic inch restrictions using the 2x SCCA
  formula.
  This puts a 4 rotor at 5200CC or approx 317 cubic inches (less than
  half of
  the requirement. Sport Class is in a state of change right now,
  as Super
  Sport is being combined with Sport. There may be other changes coming
  regarding prop design and governors due to the number of engine
over  speed  problems last year (5 engines lost to overspeed/runaway
props).  And yes, the project is already under way....  Larry

  Larry is right,  There is no mention in the rules about rotarys,
For
  this year, the ONLY engine stipulation is that it have less than 1000
  cu, in. displacement.  So a 4-rotor could be very competitive.

  Just for S & Giggles, I am bringing my plane to the racing school
in  June and may even bring it to race in Sept.  I will most likely
get last  place, but should be fun.

  The aircraft does not need to be a 2-place, but it does need to be
a  'Kit" or a long EZ variation.  That being said, it is clear the  fastest
  kit out there is the NXT.  I think a turbo 4-rotor in an NXT with ADI
  injection, spray bar cooling, and a tight cowl would have every
  chance
  of being up there with Relentless and Nemesis and the fast Thunder
  Mustangs, Ventures  Glasairs and Lancairs.

  Another option might be to try to fit a turbo 2-rotor into a
  Cassutt or
  similar formula one aircraft (used in the sport class), or a turbo
  3or4-rotor into a glassair or lancair.  Think lancair 360 or
leggacy  with a turbo 3-rotor.

  I agree that the biggest issue currently seems to be gearbox for that
  application, not to mention someone and some $$$$ to pull it all
  together.

  --
  David Leonard

  Turbo Rotary RV-6 N4VY
  http://N4VY.RotaryRoster.net <http://n4vy.rotaryroster.net/
  <http://n4vy.rotaryroster.net/
  http://RotaryRoster.net <http://rotaryroster.net/
  <http://rotaryroster.net/

  Dave,  I read somewhere that the NXT kit is no longer being sold.
If  that turns out to be the case would that disqualify the flying examples
  from competition.  Does anyone know if plans built qualifies or
does it  have to be an assembly kit.

  george grimes

George, the kit does not need to be in active production.  the Glasairs
and NXT's and lancair 360's still fly every year even though production
stopped long ago.  I believe the requirement is that at least 5 or
10 (or something like that) kits were sold to customers. They need
not even be built.  They also made a special exception for Long and
Veri-EZ's, which were never kits but were plans built.
--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net


For 'em as is interested, the site for Sport Class regs is:
www.sportclass.com/Sport_Class_Rules_2011.pdf

Dale Davies
www.sportclass.com/