Rotax 912 iS Sport instead of the 912 ULS?

[epaslick]

Originally Posted by Gagarin737

Nice movie from Rotax-Owner about installation of a 912IS in a CH750 and with that the redesign of the fuel system -> YouTube

I haven't had a chance to watch it all the way through yet, but it does look very interesting. 2 fuel pumps firewall forward... and I noticed they did not have any baffles installed...

[bhassel]

Originally Posted by Gagarin737

Nice movie from Rotax-Owner about installation of a 912IS in a CH750 and with that the redesign of the fuel system -> YouTube

While the design is quite complex, the engine is amazing; the redundancy, ease of operation (including telling you how far to move the throttle to start based upon engine/environmental parameters), etc.

Wow!

Bob

[AllThumbs]

One fellow on our field has a Pipestrel Virus with an early 912IS installation that had a number of engine issues. I was told that, to diagnose the problems, they needed a specialized Rotax tool plugged into the system - and it was expensive.

You might want to investigate how diagnosis and service of problems on the 912is compares to the bing-carb models before you commit. Parts cost for those pricy items might be a factor too.

[Bill_H]

Eric - the Rotax 912 has the equivalent of "baffles." Underneath all that wiring and hoses on top of the engine is a fiberglass shroud that covers the fins on the shanks of the cylinders. That shroud has an inlet to which you connect a scat tube with air from a cowl opening. Air blows across the fins and down. ROTAX can supply their shroud or people make their own - Vans RV12 does not use the Rotax one but one from Vans.

The cylinder HEADS are liquid cooled.

[epaslick]

Originally Posted by Bill_H

The cylinder HEADS are liquid cooled.

I did, in fact, actually know this, believe it or not...

[redbaron]

I am installing a Viking fuel injected engine (Honda) vikingaircraftengines.com with their cowling and a Whirlwind 3 blade prop. At 1/2 the cost of a Rotex and they have a firewall forward kit and dual fuel pumps. Check out the install info at Viking site.