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.

Views: 196

Reply to This

Replies to This Discussion

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?

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.

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.

Hi Jasper, did you use the new Skytec universal Rotax FWF Package?


New from Zenith:

Zenith Planes For Sale 

Classified listing for buying or selling your Zenith building or flying related stuff...

Custom Instrument Panels
for your Zenith

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, Dynon and Garmin avionics, and more.

Zenith Homecoming Tee:

Zenair Floats

Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz

Builder & Pilot Supplies:

Aircraft Insurance:


West Coast USA:

Pro Builder Assistance:


Transition training:

Lavion Aero

K&S Aviation Services

Aircraft Spruce & Specialty for all your building and pilot supplies!

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

© 2024   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service