Paul,

    Any idea of the thermal efficiency of the rotary engine?

    Or if we have reliable fuel flow and horsepower figures we can figure
    it out using the formula:

    TE = 0.1338 8 * HP / FF (in pph)



    Regards,

    Gordon.

    Somewhere aroud 28%.

    Paul Lamar


    Paul,

    Can we assume that the turbocompound engine should see about 35
    percent? This would represent about a one-third increase, due to the
    energy recovered.

    Btw, I'm surprised at the 28 percent figure. This is about the same
    as the air-cooled Lycoming. The Continental IO-550 used in Columbia
    350 works out to about 31 percent, which is very very good.



    Regards,

    Gordon.



Probably not quite that high. 35% that is.
Here are some heat balance charts.