Hi  Paul.

  1)  Aside  from   perceived  poor  fuel  economy  of  rotary  engines,
 what  are
  its  disadvantages ?

  2)  You  advised  carbs  and  magnetos.    Why  are  they  not  discussed
  here?
  Are  they  not  suitable  for  rotaries ?   If  suitable,   Let's  have
  more
  discussions.

  3)  Can  there  be  carb  icing  in  tropical  countries  below  3,000
 feet ?

  Best regards.
  Ben

  Fuel economy is only 5% higher than an aircraft piston engine. This is
 more than made
  up for by the 25% lower cost of auto gas.

  Magnetos are suitable. They will work fine.  They are just too costly.
 $2000 each new
  and $400 to $800 re manufactured plus cores. People don't want to pay as
 much for two
  aircraft magnetos as they pay for the rest of the engine. In some case
 much more than
  they payed for the engine. RX8 ignition coils are $25 each for a total of
 $100. One
  coil per plug.

  However if I were certifying a rotary I would use aircraft magnetos
  and an aircraft carb. The FAA is much more comfortable with that they
 they are with
  EFI and electronic ignition. In that case the rotary engine would pass
 certification
  in a heart beat.

  The best carb (cost verses power) to use is a two barrel 500 CFM Holley
 with a
  leaning kit.

  The FAA will not sign off on your carb engine unless it has carb heat.

  Paul Lamar

 Thanks  Paul.

 I'm  glad  there  is  someone  like  you  who
 has  the  knowledge  and  patience  to  answer
 our  questions.

 Can  there  be  carb  icing  in  tropical  countries  at  an  altitude  up
  to
 4,000 feet ?

  Best regards.
  Ben


 At the higher altitudes for sure. The evaporation of the fuel in the carb
 venturi
 causes a cooling effect.

 Paul Lamar


Paul,
My Continental IO 520D has fuel injection- but it is a very basic system
indeed. One inj per cyl, a regulator, and a mechanical "TPS". It looks like
it all related back to the manual leaning valve and quite possibly the
manifold pressure. This system seems remarkably like the old FI on the
corvettes in the early 60s. Regulators and manual flow metering.

Why would this be a difficult system for the rotary? Before I sell my
Connie, I might inventory the system and see about maybe a prototype.

Kevin Alderman

http://www.vette-vues.com/parts_for_sale.html

Early Power Sport used mech fuel injection.
It is still sold for aircraft.
http://www.airflowperformance.com/html/site_html.html


Paul Lamar

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