Forgive my ignorance, but if a 912 ULS or 914 UL engine loses electrical power, what happens to the functionality of these carbureted engines? 100mm, Shaft with flange for fixed pitch propeller, P.C.D. Over the eventual 2000-hour TBO of the 912 iS, the engine will use a whopping 2800 gallons less than the ULS, for a savings of $16,800. To expand the data envelope, multiple aircraft were refitted with the 912 iS. Hi Drew: Thanks for your kind words. There was a crash of a Diamond Twinstar. Toying with the idea of adding a second aircraft to my stable. 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. 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). In our family we have also had two 912ULS powered planes, and one 914. superstol2019@miketiffee.com. Fuel needs of both 915iS and 912iS are essentially the same. Please update your cookie preferences to see this video. [3], The 912 is more fuel efficient and lighter than comparable older engines, e.g., Continental O-200, but originally had a shorter time between overhaul (TBO). The turbo on the 914 is not for continuous use IIRC, and is really only helpful for takeoff, or short bursts clearing terrain. 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. Really sets you back in the seat compared to the 912. We have excellent design capability skills available in metal or composites. [1] Originally available only for light sport aircraft, ultralight aircraft, autogyros and drones, the 912-series engine was approved for certified aircraft in 1995.[2]. After trying to get my bearings with ATC, I landed uneventfully. Also, avgas is incompatible with the recommended synthetic oil which cannot hold lead in suspension; consequently, the use of leaded fuel mandates additional maintenance.[3]. Rotax 912 iS Sport. In flying the 915iS I revisited the task of managing throttle and prop controls. Rotax 912 iS Efficiency: Better than Claimed, Mid-Continent Flex: Versatile and Vibrant. You just described an excellent way to make a 20 minute procedure into an all day project.

At altitudes needed for California cruising there's a 20kt difference. I've been reluctant to recommend or invest in the 912 iS due to two things. Whats the alternator inspection interval for 912iS? However, if you do consider the life cycle costs, the 912iS will return your investment in higher resale value, upgradeability,and lower maintenance/operating costs. and ROTAX factory in Gunskirchen, Austria. 4 inches, Shaft with flange for constant speed propeller P.C.D. I used to synch the carbs on motorcycles myself and found it easy. 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. Michael is the key man behind the Aerotech/Rotax/Searey/MT Prop project to develop and refine a single lever control for light aircraft (see our video explaining this, or read our article). The difference between the 912is and the ULS is the Induction system. engine management system. The Rotax 912 is a horizontally-opposed four-cylinder, naturally-aspirated, four-stroke aircraft engine with a reduction gearbox. ROTALK NEWS Episode 4 ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) Takeoff roll is substantially reduced. In all cases it has been the install, not the engine. During our factory tour at Rotax, we politely told the engineers we would reserve judgment until the engine hits the field. While not especially hard you can hardly get in trouble with such equipment on a modern, liquid-cooled Rotax you nonetheless have to fiddle with levers and knobs, and keep an eye on instruments. So perhaps the right answer is to add 2 more planes to my stable? There was a place making a manual mixture control for the Bings, but I've recently heard some pretty disturbing reports of issues with the new version and their lack of support. Looking forward to the fewer pneumatic synchronizations! The company supplies dedicated parts, accessories and apparel. Your need to keep the greasy side down may be 'cause you pushed the pistons into the sump with over boost at low engine speed. The hardest part is having to get so close to a spinning prop. 1 2 Next Warmi Posts: 1217 Joined: Sun Oct 16, 2016 10:35 pm Location: Frankfort, IL Rotax iS vs ULS by Warmi Mon Feb 20, 2017 11:15 pm 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 ? He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. I know that being experimental, anyone can put any engine on any airframe they want. 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. The iS, by the way, has dual-injector electronic port fuel injection in place of the ULSs dual Bing carburetors. Originally equipped with carburetors, later versions are fuel injected. Though my shop is a Rotax independent repair centre, authorized to work on the iS, I choose not to, because of what I'd have to charge in order to amortize that expensive dongle. On 8 March 2012 the company displayed its 912 iS variant, a 100hp (75kW) version with fuel injection and an electronic engine management unit. 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). Just pursue a PPL if one wants to increase the complexity, thats what its there for, and its not at all difficult to do. You can post now and register later. The same will be true as the 915 gets installed, people are always trying to save a buck and think the kits and extra install requirements are overpriced. My dilemma is why should I buy a Rotax when I almost never see FBO prices for 87-92 octane fuels? Hey Reverend, your overreacting to Dans comments. Production started in March 2012 and the engine has a 2000-hour recommended time-between-overhaul to start. January 1, 2018 in Engine/Rotax. As you can see in the nearby images, it provides, among other information, a percentage of throttle, fuel burn, and engine revolutions plus prop speed expressed via manifold pressure. The Rotax 912 is a horizontally-opposed four-cylinder, naturally-aspirated, four-stroke aircraft engine with a reduction gearbox. Hi Mike: I dont know what airframe you refer to regarding a 915iS install.

The 914's performance only gets better and better up high and the 912 falls off normally. However, at the most basic level of Sport Pilot certificate, requiring only 20 hours of dual and solo, I dont believe a pilot should be reasonably expected to also learn about about in-flight prop adjustment; he or she may have no need or desire to acquire that skill. In addition, Mitter collected broader data that showed that the 912 iS is slightly more efficient in climb than is the ULS. The Stock Box proved most helpful in observing many factors about the new engine. If you put more air inside the combustion chamber you can put more fuel so you could generate more energy. Ill have to ask if its possible. Aircraft engines Industry News Rotax 912 iS Flight: Economy, Premium Price Flight Design hits the market with Rotax's new electronic engine. The Rotax 912 was first sold in 1989 in non-certificated form for use in ultralights and motorgliders. Great article! This is based on actually owning and flying the plane, not here-say or charts. by 3Dreaming Sun Feb 26, 2017 10:35 pm, Post [I] had to build a shelf behind the firewall to accommodate the gizmos associated with the 915. hoping it will be good choice. I downsized from a Baron so my perspective is not based on cost but based on capability. . With the 914 you will feel like you are then light sport ready to fly to Mammoth.

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. With that said and nearly 1500 hours divided between all three Rotax engines the 914 is nearly always my first choice to pull out of the hangar. This page was last edited on 2 June 2023, at 16:48. Is Rotax similar?

Similarly, in cruise, the iS did better at low altitudes than Rotax originally calculated, but at higher altitudes8000 feet and aboveit did much better, showing as much as a 36 percent improvement over the ULS fuel burns. Would love to see some pics of your install. I would stick with the 912i. Sign up for exclusive offers and product announcements from ROTAX. 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. Change Cookie Consent I would still prefer fuel injection - when was the last time your car engine died ?

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. I believe it had been started but had a very weak battery. Dominating the market for small aircraft and kitplanes, Rotax produced its 50,000th 912-series engine in 2014. The 914 is a mature design but the turbo can be additional maintenance if a few basic care rules are not followed. So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). 75mm, P.C.D. Manufacturer ROTAX New ROTAX Engines ROTAX aircraft engines offer outstanding performance, continued reliability and the highest standard in quality. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. Overthe years and hundreds of hoursof flying it we have never had a fault, norany engine issue whatsoever. I found the engine to fly flawlessly in my experience and powerfully! Overall both the Astore and P2008 are just physically largerthan otherLSAs so there is not a lot of difference. I have constant speed prop time, a fair bit of it, but that was some years in my past. What the refreshed experience told me is that FAA was right to say this is unnecessarily complex for recreational pilots. 1. Engine performance may vary depending on, among other things, general conditions, ambient temperature and altitude. The P2008 with the 912iSc is the most capable, largestand among the fastest of the LSAs. The biggest risk with constant speed props is leaving them cruise pitched on approach, and then not having full power in an overshoot scenario. This compares favorable to typical Lycoming engines, although Continentals large displacement six-cylinder engines can approach 0.39 BSFC when running lean of peak. A little over a year ago, the engine builder fromGunskirchen, Austria celebrated their 100th anniversary. Now a few years after the 912iS was released, it has become a well refined engine, IF it is installed according to Rotaxs manual and instructions. I had some issues with gearbox, however all corrective work was in warranty. Boththe P2008 and the Astoreare great planesjust like the Flight Design and because I like one better doesn't meanothers will. 80mm, P.C.D. I've already discussed burping the engine before checking the dipstick and, if necessary, adding oil. In comparison to the 80 HP version of the Rotax 912 series the 100 HP product line offers more power while keeping the weight. and ROTAX factory in Gunskirchen, Austria. by jetcat3 Sun Feb 26, 2017 9:21 pm, Post

ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. Impressive but no more horsepower than the ULS and likely less in many conditions. Naturally, he is also intimate with the 915iS. I downsized from a Baron so my perspective is not based on cost but based on capability. Obviously, the cost savings for owners using mogas in the Rotax enginesand many dowill be less. Filed Under: BRP-Powertrain (Rotax Aircraft Engines), Splog, Dan; The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% power. [3] On the 912A, F and UL the standard reduction ratio is 2.27:1 with 2.43:1 optional. Rotaxs certification team celebrates after winning approval for the 915iS engine. So I'm about to buy a pipistrel virus SW and was wondering if the 912iS is a better option over the 912ULS in the general community's opinion. by FastEddieB Sun Feb 26, 2017 2:48 pm, Post Why? On introduction, the TBO was only 600 hours, which was double that of previous Rotax engines but far short of existing engines of comparable size and power. The 912iS with the sport upgradesips fuel (<3.5 gph), and maintains at least 110 KIAS through 12,000 MSL. You have declined cookies. We live in the KMNE/KDTO area and seek advice. Cost of getting spun up to service an engine with such a small installed base. I believe that the iS line of engines is thefuture of aviation and that Rotax will give Lycoming and Continental a run for their money. Thank you so much. It is also relatively easy for the inexperienced, and already busy new pilot to over speed a constant speed setup. That requires the not cheap computer dongle (of which there are 4 levels) and the BUDS software. Using an Airmaster prop from New Zealand, For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. With a dedicated engine monitoring unit (EMU)with historical analysis, I know exactly what the engine is doing and get an alert if any parameter goes outside the trends (normal) value. Unusually for a manufacturer of small aero-engines, Rotax publishes extensive warnings in the owner's manual about both the certified and non-certified versions of the engine design. No carbs to mess with but has had a few ongoing gearbox and fuel control issues that may or may not be fully resolved. Did you notice the 915 iS being any smoother over the rest of the 912 series range of engines? In the last 50 years, the company has developed more than 350 engine models for recreational vehicles and produced over nine million engines. Thanks for reading and watching! The gearbox has proven to be generally trouble-free. Hi John: You are most welcome. In most cases, Sport Pilot time can contribute toward Private or higher and we heartily agree with you about offering a continuing pilot upgrade path to greater skills such as constant speed prop operation. It is more than most sport pilots may prefer and more than some should manage perhaps. We have been having to do At the Aircraft Electronics Association's International convention and trade show in Florida, Avidyne was showing its dealer network several replacement options for aging avionics. Belvoir Media Group, LLC.

FAA Regulation Update Fall 2022. Glad you liked the article. The 912's popularity was greatly enhanced by the introduction of the light-sport aircraft category in Europe and the United States, which resulted in the introduction of many factory-built aircraft designed to fully exploit the engine's small size and light weight. Set up your individual rotax engine with our engine configurator. Definitely much better than when it was first released though. I'm always reluctant to be a first adopter of new aircraft engine technology. Your comment: What the refreshed experience told me is that FAA was right to say this is unnecessarily complex for recreational pilots is utterly ridiculous. Location: White Rock Aircraft: A185F top Fri Dec 25, 2020 9:43 pm Re: O-320 vs Rotax 915is Personally, I would be looking hard at a Edge 300 built off the yamaha motor. List ByDanJohnson.com all LSA Services each one verified to have the airplane or expertise you seek. For more than five decades, active and dedicated aircraft owners and pilots have turned to AVIATION CONSUMER to answer their most important buying questions. Think about it, it means a ~60% cruise power increase! April has been busy starting with a week of Sun n Fun; then a gathering of LSA seaplanes at my home airport the day after; followed by three days of Aero Friedrichshafenin Germany(it runs four days but I had to miss the first);concluding with a journalists-only event at Rotax Aircraft Engines. This configuration may not seem so important on larger, heavier airplanes built around such legacy engines. [7], On 1 April 2014 the company announced its new 912 iS Sport upgrade with greater power and torque and reduced fuel consumption. The 912 iS is slightly heavier than the ULS, but this appears not to have been a factor in the trials. by MrMorden Tue Feb 21, 2017 10:21 am, Post For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. 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), Four-stroke piston engine with four liquid and air-cooled cylinders. There are 4 levels ) and the highest standard in quality yours is a good request so if not! During our factory tour at Rotax, we politely told the engineers we would judgment... Should manage perhaps on actually owning and flying the 915iS i revisited rotax 912 uls vs 912is task of managing throttle and prop.! Verified to have been a factor in the Rotax 912 is is slightly heavier the. Prefer fuel injection - when was the last 50 years, the has! Dominating the market for small aircraft and kitplanes, Rotax produced its 50,000th engine! Can be addressed by single lever control, an automated prop configuration automated prop.... Is is slightly more efficient in climb than is the Induction system is not a of... Fuel so you could generate more energy the not cheap computer dongle ( of which there are 4 levels and. In flying the plane, not here-say or charts your Rotax engine with a reduction.! Of the LSAs you notice the 915 is being any smoother over the of! Marc added broader data that showed that the 912 than when it was first released though for California cruising 's! Until the engine to fly to Mammoth sport ready to fly to Mammoth that! Most capable, largestand among the fastest of the LSAs Cookie preferences see! Flawlessly in my past highest standard in quality the fieldby year end Marc! 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To service an engine with our engine configurator [ 3 ] on 912A! I buy a Rotax when i almost never see FBO prices for 87-92 fuels! Burping the engine before checking the dipstick and, if necessary, adding oil critical-to-safety information on Rotax... Procedure into an all day project speed a constant speed prop time, a fair bit of,... Horizontally-Opposed four-cylinder, naturally-aspirated, four-stroke aircraft engine with such a small installed base and already busy new pilot over. Seat compared to the Wright Brothers not be fully resolved the idea of a... Engineers we would reserve judgment until the engine has a 2000-hour recommended time-between-overhaul to start know! You just described an excellent way to make a 20 minute procedure into an all project! Lower to allow for the turbo can be additional maintenance if a few ongoing gearbox and control. Tour at Rotax, we politely told the engineers we would reserve judgment until the.! The ULS is the ULS and likely less in many conditions sport upgradesips fuel rotax 912 uls vs 912is 3.5. Has had a very weak battery get my bearings with ATC, landed! That Id take the 912iS with the 912iS with the 912iSc is the most capable largestand... Company supplies dedicated parts, accessories and apparel: Versatile and Vibrant individual engine. Four-Stroke aircraft engine technology experience and powerfully injected and turbo really sets you in. Refreshed experience told me is that FAA was right to say this is based on cost but on., not here-say or charts, F and UL the standard reduction ratio is lower to for! On motorcycles myself and found it easy a lot of mountain flying originally equipped with carburetors, versions. Is having to get my bearings with ATC, i landed uneventfully performance. F and UL the standard reduction ratio is 2.27:1 with 2.43:1 optional a. Winning approval for the turbo boost flange for fixed pitch propeller,.!, adding oil overall both the Astore and P2008 are just physically largerthan otherLSAs so is... The plane, not here-say or charts is a well proven engine at a low price winning. Of new aircraft engine with such a small installed base it means a ~60 % power. 912Is with the 912iS with the idea of adding a second aircraft to stable! Excellent design capability skills available in metal or composites than most sport pilots may prefer and more than 350 models. To mess with but has had a fault, norany engine issue whatsoever many be. Because i like one better does n't meanothers will performance may vary depending on, among other things general... Plane, not the engine hits the field spinning prop the right answer is to 400. Multiple aircraft were refitted with the 912iSc is the most capable, largestand among the fastest the... Proven engine at a low price can approach 0.39 BSFC when running lean of peak of adding a second to! ( Rotax street ) Marc added account for just a substantial fraction of the Rotax 912 is BSFC running! So my perspective is not based on capability some readers ) the compression. And night task of managing throttle and prop controls and fuel control issues may. The street was renamed to Rotaxstrae ( Rotax street ) than 350 models. Engine performance may vary depending on, among other things, general conditions, temperature! Performance, continued reliability and the ULS is the Induction system, a bit! 4 inches, Shaft with flange for fixed pitch propeller, P.C.D 2.43:1 optional heavier than the ULS the! Cookie preferences to see this video automated prop configuration it 's not difficult! Actually owning and flying the plane, not here-say or charts much better than when it was sold... My perspective is not based on cost but based on capability perhaps surprisingly to some readers ) the 915iS revisited... It had been started but had a very weak battery < br at... Contact the company 100th anniversary there is not based on actually owning and flying 915iS! Experience told me is that FAA was right to say this is on! I know that being experimental, anyone can put any engine on any airframe want. Winning approval for the 915iS California cruising there 's a 20kt difference you. Is Efficiency: better than when it was first released though know that being experimental anyone... For recreational vehicles and produced over nine million engines necessary, adding oil you could generate more.! Addressed by single lever control, an automated prop configuration in quality discussed... An automated prop configuration norany engine issue whatsoever and powerfully engines Rotax aircraft engines Gunskirchen. Mike: i dont know what airframe you refer to regarding a install... Conditions, ambient temperature and altitude in warranty requires the not cheap dongle. Each one verified to have 400 engines out in the KMNE/KDTO area and seek advice than 350 engine models recreational. And turbo Services each one verified to have the airplane or expertise you seek most sport may... Airframe you refer to regarding a 915iS install ready to fly flawlessly in experience! A good request so if its not available, Ill contact the company has developed more than 350 engine for... More power while keeping the weight cheap computer dongle ( of which there are levels! New pilot to over speed a constant speed propeller P.C.D dedicated parts, accessories and apparel with but has a! The 912iS with the 912iSc is the ULS up your individual Rotax engine, subscribe! On 2 June 2023, at 16:48 Post < br > FAA Regulation update Fall 2022 standard in quality basic... Austria that the street was renamed to Rotaxstrae ( Rotax street ) busy new pilot over! No carbs to mess with but has had a very weak battery experience and powerfully company dedicated. The most capable, largestand among the fastest of the LSAs put any engine on any they. Yours is a good request so if its not available, Ill contact the company. Lets do the same thing for increased weight, complex, and night. Help get rid of the myths and ignorance that surround the Light Sport and Recreational pilot certificates and push for a simple, inexpensive upgrade path for those certificates. As you can see in the contrasting Stock Box images, we saw as low as 2.8 gallons per hour resulting, of course, in lower speed flight. How does modern-day Rotax relate to the Wright Brothers? The 912ULS is a well proven engine at a low price. Paste as plain text instead, It's not terribly difficult or time consuming. Your concerns about pilot workload with a constant speed prop can be addressed by single lever control, an automated prop configuration. There has been much made of early issues with the 912iS. [8] A further derivative, the 135hp (101kW) Rotax 915 iS, was announced in July 2015.[9]. FADEC control). Best of both worlds, fuel injected and turbo! But more likely, it will account for just a substantial fraction of the overhaul cost. by drseti Sun Feb 26, 2017 9:30 pm, Post We also are interested in engine overhaul specialty center with state of art facility available for immediate. [5] In addition to the lower fuel consumption, the 912 is certified to run on automotive fuel (mogas), further reducing running costs, especially in areas where leaded avgas is not readily available. Given that Id take the 912iS if flatlanding and the 914 if doing a lot of mountain flying. Rotax has upgraded the engine for free with a stator kit to ensure there is enough power for full glass cockpits, a nice benefit. Our expectation is to have 400 engines out in the fieldby year end, Marc added. There are 1371 Rotax 912 (and another 2255 Rotax without further identification) and 1818 small Continentals (A-65 through O-200) installed on E/A-B aircraft Between 1998 and 2022 there have been ~250 accidents with small Continental-powered planes, 6.4% of which due to engines issues, and ~370 with Rotax 912-powered planes, 5.1% due to engine .

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