When price is no object, the 916is and 3 blade airmaster prop with beta & reverse is always an option. My hangar neighbors newly completed kitfox climbs at over 2500fpm. But that would be well past the frugal flyer that the kr enspirits. ~90k installed for that combo.
There is always the yamaha apex w/ teal skytrax gearbox and an airmaster prop. ~25k for 180hp or turbo it up to 360hp. All about risk to performance tradeoff, at that point a lancair is more your flavor. On Tue, Aug 12, 2025, 9:04 AM Larry Flesner via KRnet <krnet@list.krnet.org> wrote: > > On 8/12/2025 1:58 AM, tiekie bernardus wrote: > > Good day. > Thank you Larry and John for your contribution about the turbo. I agree > will all that was said, although it will be nice to have the extra speed > and power as I'm a bit of a speed junkey. > Regards > Tiekie > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > It was suggested that a "constant speed" prop would benefit a turbo > installation and that is true but a "constant speed" (variable pitch) > propeller would benefit any type of engine, gas, diesel, turbine. There > is benefit to a turbo with a fixed pitch prop in that the engine is capable > of producing more HP on takeoff and climb and continue to produce rated HP > at altitude. It would require a prop with more pitch / diameter to handle > the additional HP and additional modifications to the engine / airframe to > dissipate the engine heat from from the extra power generated. Many modern > automobiles are going to smaller turbo-ed engines to increase mileage > numbers but not without reliability concerns. Design out as many failure > points as possible and have a disciplined operating procedures. Many do so > successfully. > > Larry Flesner > -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet >
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