Terry
I suspect you are right. If an O-360 Lycoming can be cooled with an
inlet area of only 14 square inches why does it take the same (aprox) to
cool a Rotax?
Graham
Terry Seaver (terrys) wrote:
> I believe the biggest improvement in reducing drag would be found in the
> engine cowl area. Closing off the gills would be the first thing (they
> add no value to the plane). Second would be to clean up the radiator
> opening and following duct, it is too large for the size of this engine
> and is rather messy. Then clean up the radiator exit, it is very messy
> back there. We carefully installed the Kim Prout main gear fairings and
> saw ZERO improvement in cruise speed, which leads me to believe that the
> lower cowl exit is so turbulent that fairing in the main gear (or even
> retracting it) has little value. A magazine flight test on the Europa
> motor glider reported that there was no improvement in glide performance
> gear up vs gear down, which further supports my suspicion on the cowl
> problems.
>
> regards,
> Terry Seaver
> N135TD, XS mono-wheel with 912S.
>
>
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