915is Updates in the Kitfox?

[SomeDay7]

Any body know what kind of prop setup you might want to run with this engine. Pitch, length and type? Just fantasizing I guess. Jim

[Esser]

It would almost be pointless to have this engine without a constant speed prop. Rumour has it that it has to be hydraulic so that rules out airmaster and pretty much only leaves GT/MT propellers

[SomeDay7]

Just wondering if the prop and hub would come straight from rotax or other combinations would work since it is automatic with the 915is

[Av8r3400]

I'd like to know whose hydraulic constant speed prop falls into the the MMOI requirements laid out by Rotax for the gearbox. Or did they strengthen the gearbox to handle a higher inertia?

[Ronin]

I believe the Whirlwind CS meets it.

[jabkwab]

MT makes hydraulic propellers for Rotax engines, installed on Diamond da-20 aircraft.

https://www.mt-propeller.com/en/entw/pro_hydr.htm

[jdmcbean]

Here is a quick update on the 915is
As many of you have figured out we are working on the firewall forward package for the 915iS. We have 1 of 3 915iS prototype engines available and have been working on a mock-up airframe to determine many things. We were concerned we would need completely new cowlings and possibly a completely different setup. Rotax made some changes from the 912iS that complicated the install. The Turbo is larger, the exhaust is much larger, a larger oil cooler and unlike the 914, the 915 REQUIRES an intercooler. We have been able to make some small changes for most the install and needed to make a custom intercooler and ducting to the intercooler. The firewall forward is also going to need Teflon hoses due to the tight routing.
Currently the engine requires a hydraulic constant speed prop. The only one available is MT.. that will change fairly quickly as there are others working on props now. The single lever control is a topic for another post.
We are now removing the Titan from the STi in preparation for the 915. If all goes well we should have an engine run close to the end of the month.
The Titan has been a solid engine with great performance and I would not hesitate to use this engine as the Lycoming/Continental alternative engine for the Kitfox.
The complete Titan firewall forward and engine are now available if anyone is interested. Contact us directly for pricing.
We’re looking forward to flying the 915!

More details to come...