New Rotax 915is trubo fuel injected 135 hp
Moderator: drseti
Re: New Rotax 915is trubo fuel injected 135 hp
Should be seeing it soon! https://www.avweb.com/avwebflash/news/S ... 216-1.html
Re: New Rotax 915is trubo fuel injected 135 hp
All this sounds good, but the 915 can only use a constant speed prop due to its shaft design for oil flow through the shaft to the prop flange. This means no LSA.
Roger Lee
Tucson, Az.
LSRM-A, Rotax Instructor & Rotax IRC
(520) 574-1080 (Home) Try Home First.
(520) 349-7056 (Cell)
Tucson, Az.
LSRM-A, Rotax Instructor & Rotax IRC
(520) 574-1080 (Home) Try Home First.
(520) 349-7056 (Cell)
Re: New Rotax 915is trubo fuel injected 135 hp
I think they are working on the non-constant prop version and in any case, if more power is desired, one can always go for a cheaper version at http://badasspowersports.com ( as long as it is an ELSA)roger lee wrote:All this sounds good, but the 915 can only use a constant speed prop due to its shaft design for oil flow through the shaft to the prop flange. This means no LSA.
Flying Sting S4 ( N184WA ) out of Illinois
Re: New Rotax 915is trubo fuel injected 135 hp
From what I understand, the Edge Performance 912ULS turbo is around $30K with a crate-new 912ULS. Interesting option for those wanting a turbo.
I'm actually a bit interested in their big bore and EFI. Don't know that I need the 18 hp but, heck, it's only $$$. Now all I need to do is find a few thousand lying around....![Very Happy :D](./images/smilies/icon_biggrin.gif)
I'm actually a bit interested in their big bore and EFI. Don't know that I need the 18 hp but, heck, it's only $$$. Now all I need to do is find a few thousand lying around....
![Very Happy :D](./images/smilies/icon_biggrin.gif)
dave
Re: New Rotax 915is trubo fuel injected 135 hp
dstclair wrote:From what I understand, the Edge Performance 912ULS turbo is around $30K with a crate-new 912ULS. Interesting option for those wanting a turbo.
I'm actually a bit interested in their big bore and EFI. Don't know that I need the 18 hp but, heck, it's only $$$. Now all I need to do is find a few thousand lying around....
Actually TL Ultralight already supports in their Master List of Equipment alternative Rotax engine modifications :
http://sportair.aero/category/12-epapower/
I don't know of any other LSA manufacturer that is willing to risk it - in this case, the SA-R915i engine ( 130 HP) is ridiculously expensive at something like 60K so it is not practical at all ... but I am surprised that they allow it in the first place ( since I am sure Rotax is not going to endorse that )
Flying Sting S4 ( N184WA ) out of Illinois
Re: New Rotax 915is trubo fuel injected 135 hp
It's sounding like Rotax is touting the "single lever" power + prop control to get away from having a separate prop control. I suspect they are going to petition the FAA for an exemption to the LSA rules based on the fact that a single lever config adds no operational complexity and thus no more pilot workload.
Andy Walker
Athens, GA
Sport Pilot ASEL, LSRI
2007 Flight Design CTSW E-LSA
Athens, GA
Sport Pilot ASEL, LSRI
2007 Flight Design CTSW E-LSA
Re: New Rotax 915is trubo fuel injected 135 hp
So this "single lever" props is basically a prop with a simple switch where you can pres-elect different cruise/climb pitch stages ?MrMorden wrote:It's sounding like Rotax is touting the "single lever" power + prop control to get away from having a separate prop control. I suspect they are going to petition the FAA for an exemption to the LSA rules based on the fact that a single lever config adds no operational complexity and thus no more pilot workload.
Flying Sting S4 ( N184WA ) out of Illinois
Re: New Rotax 915is trubo fuel injected 135 hp
No, the prop control is fully controlled by the computer in response to engine power setting. There is one "power" lever, that controls both the engine RPM and the prop setting. There is NO other prop control. It's literally the same operation as a fixed pitch prop.Warmi wrote:So this "single lever" props is basically a prop with a simple switch where you can pres-elect different cruise/climb pitch stages ?MrMorden wrote:It's sounding like Rotax is touting the "single lever" power + prop control to get away from having a separate prop control. I suspect they are going to petition the FAA for an exemption to the LSA rules based on the fact that a single lever config adds no operational complexity and thus no more pilot workload.
I'm guessing the mapping does something like going courser in the 55-75% power range, and then going very flat above 80-90%. That would optimize cruise speed in typical cruise settings and optimize climb in full power takeoff and mid-course climbs.
Andy Walker
Athens, GA
Sport Pilot ASEL, LSRI
2007 Flight Design CTSW E-LSA
Athens, GA
Sport Pilot ASEL, LSRI
2007 Flight Design CTSW E-LSA
Re: New Rotax 915is trubo fuel injected 135 hp
Ok makes sense- sort of like our semi-smart carbs hehe...
Btw the way FAA operates , by the time a petition like that gets approved/rejected, the issue in question probably will no longer be relevant ...
Btw the way FAA operates , by the time a petition like that gets approved/rejected, the issue in question probably will no longer be relevant ...
Flying Sting S4 ( N184WA ) out of Illinois
Re: New Rotax 915is trubo fuel injected 135 hp
And with 0% power . . . the prop would feather, to reduce drag, in the event of total power loss.MrMorden wrote:I'm guessing the mapping does something like going courser in the 55-75% power range, and then going very flat above 80-90%. That would optimize cruise speed in typical cruise settings and optimize climb in full power takeoff and mid-course climbs.
Bill Ince
LSRI
Retired Heavy Equipment Operator
LSRI
Retired Heavy Equipment Operator
Re: New Rotax 915is trubo fuel injected 135 hp
Yes, this is what Kitfox is using on the STi as well as the SeaRay. Seems like a pretty cool system!
“He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. “Stress is actually a little less therefore with the turbo engine,” he said.
Rotax’s 915iS uses the same displacement as the 912iS. In a weight-to-power comparison — grams per kilowatt hour — fuel consumption is only about 6% higher in the more“On the point about an in-flight adjustable or constant speed prop, Rotax Aircraft Engines top boss Thomas Uhr made an important statement when I asked about fixed pitch props on the 915, “All our engines can use fixed pitch props.” As a leader of a public company, he spoke carefully, but the suggestion was clear: Yes, a fixed pitch 915iS is coming, although today the engine is only driving an in-flight adjustable prop.
“He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. “Stress is actually a little less therefore with the turbo engine,” he said.
Rotax’s 915iS uses the same displacement as the 912iS. In a weight-to-power comparison — grams per kilowatt hour — fuel consumption is only about 6% higher in the more“On the point about an in-flight adjustable or constant speed prop, Rotax Aircraft Engines top boss Thomas Uhr made an important statement when I asked about fixed pitch props on the 915, “All our engines can use fixed pitch props.” As a leader of a public company, he spoke carefully, but the suggestion was clear: Yes, a fixed pitch 915iS is coming, although today the engine is only driving an in-flight adjustable prop.
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Re: New Rotax 915is trubo fuel injected 135 hp
I would love to see this engine on a Arion Lightning. Any ideas out there if it would fit?
Re: New Rotax 915is trubo fuel injected 135 hp
I think you should ask directly Nick Otterback about installing 915is ... when I was looking at Arion LSAs he was very responsive and replied to my emails rather quickly.
Flying Sting S4 ( N184WA ) out of Illinois
Re: New Rotax 915is trubo fuel injected 135 hp
It’s got to be smaller than that big six cylinder Jabiru, it should fit, but not sure how the weight & balance would work out.Coloradoeasyrider wrote:I would love to see this engine on a Arion Lightning. Any ideas out there if it would fit?
Andy Walker
Athens, GA
Sport Pilot ASEL, LSRI
2007 Flight Design CTSW E-LSA
Athens, GA
Sport Pilot ASEL, LSRI
2007 Flight Design CTSW E-LSA