Zenith Aircraft Builders and Flyers
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915is/916is in a Cruzer?
I'm looking at the Skytek FWF with a 915is or 916 in a Cruzer. Probably a 915 due to cost. I am primarily looking at this turbocharged engine to ensure I don't get stuck in a downdraft at 14,000+ DA. I would also like the cruise performance to be able to take some short cross country trips.
Mark Pensenstadler posted something recently that made me wonder how the airframe handles higher airspeeds, in terms of noise and vibration. My best guess at high speed cruise with this engine is 125kt TAS or about 105 kts indicated (145mph TAS / 120 mph IAS) at sub-oxygen altitudes. If it will shake/rattle at those speeds I might reconsider my engine choice.
The other complication is if the noise is just due to the prop and engine running at a high speed that wouldn't actually be an issue, as the 915 will spin the prop at about 2,000 rpm at cruise (115hp/9gph or 7.5gph for the more fuel efficient 916is.).
If the Cruzer won't Cruze at 125 kts I would probably look at a 914.
Replies to This Discussion
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Permalink Reply by Chris W on
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I'm interested in this also. Does anyone have any information about it? In regards to FWF, does the 912iS mount also fit the 915/916? Are there likely to be problems with the fact that it's 50# heavier?
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Skytek has a package for both. The mount is the same, the primary difference is the gearbox and prop flange is further out on the 916.
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I'm just finishing up an install of a Skytek provided 914 on a 750 STOL. Feel free to ask any questions, keep in mind I've run the engine but haven't flown yet.
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Hi Jasper, did you use the new Skytec universal Rotax FWF Package?
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