Kitfox Announces New Model With Stunning New Rotax Engine


Kitfox Aircraft, ever the innovator in the kitbuilt industry, showed early examples of its latest Series 7 STi with the promising new six-cylinder Rotax 918 iS. Kitfox isn’t saying much about the performance, but with 231 claimed horsepower from the turbocharged, 2-liter six, it ought to be a performer.

Kitfox hasn’t said if it has made changes to the airframe to accommodate the new Rotax, or how the weight and balance works out, but we hope to find out soon. If the current Series 7 STi performs so well with the current line of four-cylinder Rotax engines (and others), one can only imagine how the 918-powered Kitfox will perform.

No word on prices of either the new Series 7 kit or the 918 iS as of yet. Apparently word of the six-cylinder evolution of the long-running 912-series engines had not yet reached Austria in time for them to actually design and prototype one. We’ll get back to you when we know for sure.

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Marc Cook
Marc Cook is a veteran special-interest journalist who started as a staffer at AOPA Pilot in the late 1980s. Marc has built two airplanes, an Aero Designs Pulsar XP and a Glasair Aviation Sportsman, and now owns a 180-hp, steam-gauge-adjacent GlaStar based in western Oregon. Marc has 5000 hours spread over 200-plus types and four decades of flying.


  1. I stared at that photo for 10 minutes, working out how I’d put it in an RV-7….before I noticed the date….You got me good!

  2. I was so hoping it was true. I’d love to throw out the frail and expensive 60-year-old designed Conjunktinental TSIO 360 in my Mooney and replace it with a mogas-eating Rotax.

  3. Simple fact is a six-cylinder and naturally-aspirated version of the 912 makes more sense than wacking turbochargers on a four-cylinder 912 in the pursuit of more horsepower.


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