Regardless all the electrical power to run the engine comes from the engine. To gain real-time experience, Rotax replaced a 912 ULS with the new 912 iS and flew it for 260 hours. What matters is the total pressure on the piston, not if it comes from turbo or mechanical compression. Rotax Powertrains . Immediately the engine burst to life. Hi Drew: Thanks for your kind words. 2 cents worth from an owner, Id say buy the 912iS or wait until the 915 is available, avoid the old tech dual carbd engines regardless of cost. To expand the data envelope, multiple aircraft were refitted with the 912 iS. Thanks for reading and watching! By 100mm, Shaft with flange for fixed pitch propeller, P.C.D. And, there were a lot of SBs on the 912 iS early on. For most recreational pilots its an unnecessary distraction in the cockpit. Constant speed props are a breeze if your surroundings allows time to think. So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). When I hear negativity about the 914 it is nearly always from someone who has never flown behind one. Overall I would argue better minds than ours made a good call. Boththe P2008 and the Astoreare great planesjust like the Flight Design and because I like one better doesn't meanothers will. I found the engine to fly flawlessly in my experience and powerfully! As a result, my posts to this website may be out of date order but the good news I have lots to report. by jetcat3 Sun Feb 26, 2017 9:21 pm, Post If the latter is not familiar to you, dont worry about the detail for now but see an important point below*. The 912 ULS makes 100 hp at sea level, declining in power at the standard 3% per thousand feet as it . The lightest engine in the Rotax aircraft engine portfolio. I would prefer the 914 if I was you. Then the fuel source was switched to a second tank and the consumption precisely measured on the ground after exactly an hour of flight. The injected engines have/require among other things metal fuel lines, high pressure filters, and providesubstantially more electrical power along with over 27 engine sensors and dual redundant Engine Control Units (ECU). Much better and cheaper than MT prop. When single lever constant speed (CS)props become available, hopefully late this year, only the iS engines will be eligible sincetheyarefull fadec engines,that means only the 912iSor 915iS. because I thought you saved a lot of carburator work, hence 912iS being simpler.. but I'm no expert. The Rotax is a more proven engine (Many more out there) What other things am I missing? One difference from prior experience was the Stock Box instrument (more formally, Stock Flight Systems Engine Monitoring Unit or EMU) developed by Michael Stock incollaboration with Rotax. Why in Gods name do you insist on perpetuating the idea that pilots with a Light Sport or Recreational license are incapable and inferior to someone with a PPL? Climbs to 12,000 will have a night and day difference as well. I prefer a supercharger over a turbocharger anyday. Yes there will likely be some carb maintenance on the 912ULS and the 914 but overall we have seen less issues than on the 912is. Naturally, he is also intimate with the 915iS. All three Rotax engines are offered by Tecnam because we believe they are all good viable choices. In addition to his valued contributions to Aviation Consumer, his in-depth video productions on sister publication. It is true that the 115 hp is available for five mins. I can inquire, but so can you, directly with the engine manufacture. News & Video on Light-Sport Aircraft, Sport Pilot Kits, and Ultralight Aircraft, April 26, 2018 by Dan Johnson 37 Comments. That sounds dubious to me. I would buy another 912iS if I were to build another A/C. The discussion forum for Sport Pilots and Light Sport Aircraft, Post Rotax decided that direct injection, which is becoming common in cars as a means of teasing more fuel economy, wasnt worth the expense of re-engineering the cylinders. The engine differs from previous generation aircraft engines (such as the Lycoming O-235) in that it has air-cooled cylinders with liquid-cooled heads[4] and uses a 2.43:1 PSRU reduction gearbox to reduce the engine's relatively high 5,800rpm shaft speed to a more conventional 2,400rpm for the propeller. Do you have an update? I keep reading about 912 iS being a smoother running engine . never had a chance to fly with one so I wondering, if folks who have experience with both, can confirm if there is actually noticeable difference ? At this setting the 914 is making a lot more horsepower that a 912. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. Upload or insert images from URL. We are about 90 percent done and 90 percent to go. Many years ago flying a 182 into Townsville combined military civilian airport aircraft everywhere more radio chat than a wireless. Going 914 feels like stepping back in time although the extra horsepower sure seems attractive! Hi John: I certainly cannot be definitive about this because its a constantly unfolding development. I was replying to Jay who said he was doing a SS build with a 915 and was hoping to see what he mentioned in his post. Production started in March 2012 and the engine has a 2000-hour recommended time-between-overhaul to start. Your email address will not be published. Engine with the best-in-class power-to-weight ratio. FAA Regulation Update Fall 2022. The new Sport Pilot rule makes flying affordable! * leaded, unleaded, AVGAS 100LL, Ethanol 10** max. If you have an account, sign in now to post with your account. Where can I see fuel burn/altitude charts for the 915is engine? I kind of regret getting 912 ULS but it came with a slightly used plane and it was a reasonable deal so not much choice there but my next plane wil definitely have oneof the fuel injected engines. Flight Design's base price on the 912 iS version of the airplane is $152,500 versus $139,800 for a comparably equipped 912 ULS CTLS. Just SuperSTOL coming along ok working out 915 problems. or simplicity? Flying the new 915iS in an Aquila light aircraft. It is more than most sport pilots may prefer and more than some should manage perhaps. In power mode, it runs at about Lambda 0.8 or 0.9. He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. What make and model of turbocharger does Rotax use on the 914 and 915is engines? I believe it had been started but had a very weak battery. During our factory tour at Rotax, we politely told the engineers we would reserve judgment until the engine hits the field. The 80hp (60kW) versions are sufficient to power the new generation of efficient motorgliders, such as the Pipistrel Sinus and the Urban Air Lambada. Starting was as with any Rotax 9-series engine Ive ever flown. Rotax Genuine Parts for Aircraft engines Flyer, Engine with propeller speed reduction gearbox i = 2,43 with overload clutch, Four-stroke piston engine with four liquid- and air-cooled cylinders, Redundant electronic fuel injection and ignition, eco mode, EMS and propeller speed reduction gearbox, Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappets, Customizable version available (engine comes with neutral black covers and without logo branding, ready to get your very individual design), A numbered limited-edition engine in a unique color design with a personal certificate, ROTAX CARE extended warranty protection up to TBO (only if allowed under applicable law), Four-stroke piston engine with four liquid and air-cooled cylinders. Earlier this year, Rotax. A back-of-the-envelope calculation reveals that these numbers rival diesel efficiency and if mogas is factored into the equation, flying a 912 iS-equipped aircraft is substantially less expensive than the equivalent 912 ULS. Having said that I chose FD 3 times in a row for some particular reason! The 912is is the first full fadec aviation engine with auto lean of peak and it has been a challenge. I am getting ready to build a Sling 2, 51% EAB, with Midwest Sky Sports. 2:43:1 Gear Reduction, Electric Start and Engine Mount. Carbs are never "better" in terms of performance the only potential benefit of using carbs would be that , in some scenarios, they are simpler to troubleshoot and fix and don't need electricity to run. Rotax-Owner.com - 912ULS Vs. 912iS Warm Up Time Subscribe Login Forum Videos Training Support / Bulletins Blog CLASSIFIEDS FLIGHTSAFETY ROTAX NEWS Top Rotax-Owner.com This website uses cookies to manage authentication, navigation, and other functions. I believe this is because of the slightly lower compression ratio but I could be wrong on that. About 20 different airframes are flying today.Some 46 different manufacturers are working to prepare the new powerplant. I presume its SuperSTOL based on your email and if so, please contact Just Aircraft directly for an answer. However, the engine received US Federal Aviation Administration (FAA) certification in 1995, and by 1999, the TBO had increased to 1,200hours;[3] on 14 December 2009, the TBO was raised from 1,200hours to 1,500hours, or 1,500hours to 2,000hours, depending on serial number. We have been conned into the cheap bolt on turbo extra power. ROTALK NEWS Episode4ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) Low-weight engine with excellent performance at high altitudes. Once at altitude, Christian demonstrated use of the throttle and prop controls this was not a single lever control airplane to adjust for speed or economy. 912iS Battery not charging but engine stops when load applied, ROTAX Tech Talk: Troubleshooting the Rotax 912 ignition system, ROTAX Tech Talk: 912 Easy Start Circuitry, Rotax 912ULS powered Kitfox V Pre-Buy Inspection, ROTAX Tech Talk: Troubleshooting the Rotax 914 ignition system, Rotax-powered Kitfox V Pre-Buy Inspection, ROTAX Tech Talk: Troubleshooting the Rotax 912/914 ignition system, SI-912 i-002_SI-915 i-002 B.U.D.S. Dan, thank you. Really sets you back in the seat compared to the 912. We dont yet know if these will be required replacement items. Price does not include shipping. The extra cash is probably not a huge deal when you are already spending $17k on an engine or $100k+ on a new airplane, but on an LSA 22lb can be significant. Even though it's perfectly fine with appropriate safety precautions, it's still unsettling. In a light sport it does all the work necessary at whatever altitude airport and density altitude operations plus it starts really easy, get's great fuel mileage for those long trips and has no instances of "rubber in the carbs". 80mm, P.C.D. In 1999, the 912S / ULS were introduced;[3] enlarged to 1,352 cubic centimetres (82.5cuin) with a compression ratio of 10.8:1, yielding 100hp (75kW). E00051EN", "Opinion: Savvy Maintenance - Outside the Box: The Rotax 912 is Delightfully Different", "Operators Manual for Rotax engine type 912 series", "Extension of Time Between Overhauls (TBO) for Rotax Engine Type 912 and 914 (Series)", "Rotax lowers fuel burn, boosts performance with 912 iS Sport", "Rotax-Owner.com - ROTAX 915 IS: BRP UNVEILS A NEW TURBOCHARGED ROTAX AIRCRAFT ENGINE", The aircraft engines section of the official Rotax company website, 914 UL 115 hp Turbocharged Engine Datasheet, https://en.wikipedia.org/w/index.php?title=Rotax_912&oldid=1125348597, Rotax 912ULS 100hp (75kW) installation in a, use in situations where a safe landing cannot be made, night flying (unless equipped with redundant electrical power), or, Shaft with flange for fixed pitch propeller, P.C.D. Flying Sting S4 ( N184WA ) out of Illinois. Soon after advancing the throttle, I noticed greater acceleration but two other parameters were more obvious. In terms of the CS prop, as I understand it, there is only one solution for US-LSAs being evaluated,and that is for a single lever control, and only the iS engines are able to interface with this system. Thanks in advance, everyone. When Rotax surprised us last year with the rollout of its new 912 iS engine, we were skeptical of a claimed 20 percent improvement in fuel economy against the old standby 912 ULS. ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. This engine series offers a time between overhauls of 2,000 hrs and the best power to weight ratio in its class - no surprise that this engine is the best selling 4-stroke engine. The iS engine is very nice, but it's $3000 more than the ULS (current CPS pricing) and weights ~22lb more. continuous power at 5500 1/min*** MOGAS, no hydraulic governor. And I have two customers who now have the 912 iS (neither have needed work on their engine yet). Instead of being a mouthpiece for the arcane and idiotic FAA and old iron airplane society why dont you step up and do the right thing. 75mm, P.C.D. [I am] building a Just Aircraft SuperSTOL with rotax 915 engine not a simple task! Heres our video on a system called Single Lever Control, which LAMA has promoted with some success to FAA for consideration in their ongoing Rulemaking update to LSA and Sport Pilot. Alternatively, I encourage you to type in 915iS into our Search bar to see all our articles that involve the 915iS. Remove Cookies In flying the 915iS I revisited the task of managing throttle and prop controls. The single lever requirement is what caused the altitude compensated carbs to be implemented versus amixture control so it is likely the FAA will remain steadfast on this requirement. Greaser! The 912ULS has a single stator with 2 poles that are used for the ignition. 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rotax 912 uls vs 912is