Michele wrote:

My father and I are building a Velocity aircraft and are interested in information 
related to using a rotary engine in this
application.  Specifically we are interested in the new 3 rotor engine as 
used in the RX8.  We have heard that rotary engines
are loud.  Is this true?  Also what would be needed for cooling?  
Any info you can provide would be appreciated.



Thanks,

Ray Thomas

The three rotor is not used in the RX8. A 237 HP two rotor is used.
250-300 HP three rotor engines are available however.

You need about 2.3 cubic inches of radiator for every HP.

Yes it is true that the current 2 rotor RX7 engine is loud but you 
don't need a muffler if you use a turbo.

Nobody on here has heard an RX8 engine with open side exhaust ports but
I would not be surprised if it were not a lot quieter than the current
RX7 engine with peripheral open exhaust.


Paul Lamar
 
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