> Hello
         >
         > I am now the owner of this rotary engine that was made by Yaw
        power. It is
         > installed in my newly acquired Merlin GT. The aircraft has never
        been flown
         > and
         > the engine has 0 hours on it. To make a long story short I have
        limited
         > knowledge on rotary and I need all the help I can get.
         >
         > Thanks
         >
         > Ron Anderson
         >
         >
         > I added you to the list Ron so ask any question you wish no
   matter
         > how dumb you might think it is. There are no dumb questions
         > on here.
         >
         > BTW Since the Merlin GT is an ultra light I assume the engine
         > you bought from Paul Yaw was a one rotor. Even the one rotor
         > Mazda engine is a bit heavy for this airplane.
         > --
         > Paul Lamar ...No rotor no motor.


         > I agree and I may have to replace it, but it came mounted in the
        plane so
        I think I'm going to try it first. Other Merlins at Blue yonder
        Aviation are
        flying with  O 200s, I think they are about 200lbs. And yes it is a
        one rotor
        engine and I have no idea how much it weighs, and it is the same
        engine that is
        in the picture. Paul paints his engines blue and the red was a one
        of special
        request.

        1st question (all my questions will be dumb. sorry)

        What type of electronic fuel pump would you recommend and how
   much fuel
        pressure is required for a one rotor

        2. Any special way to plumb the engine to avoid excessive heat?
        3. Any special type of exhaust system needed?
        4. what would be normal temps and oil pressure readings?

        Thank you for repleying

        Ron Anderson


         >

        1. I like the MSD or Carter rotary vane fuel pumps.
        Not Walbro.

        2. Yes of course. The rad and oil cooler ducting and sizes of
   rad and
        oil cooler must be correct. This adds weight of course.
        You will need a rad of about 300 cubic inches and an oil cooler
        around 120 cubic inches. The larger the frontal area the better.
        In other words 20" by 20" by 1" thick is better than 10" by 10"
   by 4"
        thick. Get my cooling book from AC Spruce.

        3. Exhaust design is not important but use .065" wall 321 SS on the
        first
        third or half of the exhaust. Do Not use mild steel.

        4. Try to keep the water and oil below 200 F. 220 F water and
   oil is OK
        for awhile but not recommended.
        --
        Paul Lamar ...No rotor no motor.


   Somehow I thought it was 300 cu-in for a 13b and that a single rotor
   would be less.  Ron's engine is a single.


   Regards,

   Matt-

   600 cubic inch for a 13B minimum. More is better.

     Paul Lamar ...No rotor no motor.



Thanks Paul..  I remembered wrong.

I can see why you state it the way you do.  300 cu-in / rotor is a more
useful metric.


Matt-


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