April 28, 2023 1:39 am

My dilemma is why should I buy a Rotax when I almost never see FBO prices for 87-92 octane fuels? 2:43:1 Gear Reduction, Electric Start and Engine Mount. The 912is is the first full fadec aviation engine with auto lean of peak and it has been a challenge. 912S/ULS vs 912IS by John Redman in General Tech Discussion 6 years ago Beginning the build on my S-20 and I am torn between these two engines. superstol2019@miketiffee.com. Use spaces to separate tags. Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet. Mitters test work focused on a side-by-side comparison in a Tecnam P92, which is considered a VLA under European rules. Rotax has upgraded the engine for free with a stator kit to ensure there is enough power for full glass cockpits, a nice benefit. Best of both worlds, fuel injected and turbo! FAA Regulation Update Fall 2022. 80mm, P.C.D. Think about it, it means a ~60% cruise power increase! Rotax-Owner.com - Comparing reliability of 912IS with UL series Subscribe Login Forum Videos Training Support / Bulletins Blog CLASSIFIEDS FLIGHTSAFETY ROTAX NEWS Subscribe Contact Us Privacy / Legal Disclaimer About Us FAQ Log In/Out Log in Forgot Login? The non-certified 912 iS targets the light sport and homebuilt aircraft market and 912 iSc will be certified. In a four-cylinder, high-RPM geared engine, that sounded like an overpromise. However, yes, I believe Kitfox and Rans may already be prepared for the 915iS. 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. The Rotax 912 series is well regarded for its reliability and efficiency and is primarily targeted as . 75mm, P.C.D. I have always been drawn to the fit and finish of Tecnam. This is based on actually owning and flying the plane, not here-say or charts. I am torn between the 912ULS and 912iS. Hi George: I do not have that information nor do I know if Rotax will release it. Yes, only Aerotrek can advise about the 915 availability. Facts . Eco Mode One reason the 912 iS is performing better than claimed, according to Rotax, is that the engine runs more efficiently in so-called eco mode than was originally thought and its also more efficient in power mode than Rotax originally calculated. We have excellent design capability skills available in metal or composites. So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). The 912iS requires a more robust installation, as mentioned, things like metal fuel lines which require exact fits, unlike rubber hose, butit also requires the sensor tiedownkit, which is a few hundred dollar kit,with sensor specific tie downs to eliminate false alarms due to sensor vibration. [3] The original 80hp (60kW) 912 UL engine has a capacity of 1,211cc (73.9cuin) and a compression ratio of 9.1:1. any and all info you can provide would be golden. To get below 3 gph, a surprisingly low consumption rate, speed dropped below100 knots true or 85 indicated. The short TBO and lack of certification for use in factory-built type certificated aircraft initially restricted its worldwide market potential. The climb angle seemed vigorously steep, although this was my first experience in an Aquila aircraftso I had no basis of comparison. 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. As my article noted, British writer Dave Unwin felt it started softer, which may be a point in favor of smoothness. 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. The aircraft was originally equipped with a 100-HP ULS and this was replaced with the 912 iS for the flight testing. Nice looking airplane. Learn how your comment data is processed. That's a $12,700 price premium or about 9 percent. To me, the 915iS is better suited to larger (heavier) aircraft or those serving particular missions, such as LSA seaplanes or aircraft operating from high elevation fields. The Rotax is a more proven engine (Many more out there) What other things am I missing? Impressive but no more horsepower than the ULS and likely less in many conditions. The compression ratio is one thing the pressure inside the combustion chamber is another thing, in a turbo engine the the air is forced inside the combustion chamber in a normal engine is aspirated, thats why even at lower compression ratio the pressure inside a turbo engine is much higher. 75mm, P.C.D. Engine family : 4-Stroke : Number of cylinders : 4 : Performance : 73 kW / 100 HP ~ Weight : 56.6 kg : Performance / RPM : 73.5 kW / 5800 rpm : Engine torque / RPM . Id love to put this engine on an AeroTrek. The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% . and ROTAX factory in Gunskirchen, Austria. The 912ULS has a single stator with 2 poles that are used for the ignition. Looking forward to the fewer pneumatic synchronizations! Im happy to talk more at our e-mail or even here. It features liquid-cooled cylinder heads and air-cooled cylinders. Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. Just make sure you know what you're getting into. The Rotax 912 was first sold in 1989 in non-certificated form for use in ultralights and motorgliders. Rotax 912iS versus the 914 Turbo - Which One. Ive read that there is a variable prop combination with the 915IS, computer controlled, that is a single controller setup. 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. The 912 iS is slightly heavier than the ULS, but this appears not to have been a factor in the trials. 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. Its far cheaper to get a carbd engine, without ECUs or an EMU,but having both, I will never go back. I had some issues with gearbox, however all corrective work was in warranty. Ill leave this forum to the CT crowd who know that very capable airframe. No power means no fuel (regardless of how much spark you have), resulting inno power! An Astore with 912iS and a P2008 with the 914 :-). Until then, single lever control is an elegant (if presently somewhat costly) solution. We dont yet know if these will be required replacement items. After a 4-month break, we are back at it. In comparison to the 80 HP version of the Rotax 912 series the 100 HP product line offers more power while keeping the weight. The 912iS with the sport upgradesips fuel (<3.5 gph), and maintains at least 110 KIAS through 12,000 MSL. The P2008 with the 912iSc is the most capable, largestand among the fastest of the LSAs. 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. 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. All three Rotax engines are offered by Tecnam because we believe they are all good viable choices. As yourself this question.. (You must log in or sign up to reply here. I've yet to dig through the manual, guys, but I think Andy nailed it. We have been conned into the cheap bolt on turbo extra power. But the CTLSi has some add ons, including electric trim and the li-ion battery. The 912 iS is approved for 91 AKI mogas, but in equipping the engine with future knock-sensing capability, Rotax seems to be anticipating approvals for lower-octane fuels. The 912is has a few minor Differences/Improvements but the rest of the engine is essentially the same. Sign up for exclusive offers and product announcements from ROTAX. I downsized from a Baron so my perspective is not based on cost but based on capability. Im about to take the plunge! and ROTAX factory in Gunskirchen, Austria. To expand the data envelope, multiple aircraft were refitted with the 912 iS. Boththe P2008 and the Astoreare great planesjust like the Flight Design and because I like one better doesn't meanothers will. This is a surprisingly common accident factor in floatplanes in particular for whatever reason. We are interested in development of sea plane with passenger capacity of 15 plus passenger with a turbine twin engines. Customer Service Information Report (CSIR). Rotax Powertrains . The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. ROTALK NEWS Episode 5Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft. Obviously, the cost savings for owners using mogas in the Rotax enginesand many dowill be less. extend the cowling 3.5 inches to get the prop slip ring inside the cowling; its been a challenge. Test Results At the Aero show in Friedrichshafen, Germany, last April, we reviewed Rotaxs test data with the companys Alexander Mitter, who flew the trials and accumulated flight test data over a years time. It just depends on what you want. I like the 914 because it is smoother, quieter and substantially more powerful! [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). 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. 80mm, P.C.D. In my opinion as an engineer the supercharger is safer and for that reason even with the parasitic power draw. Would end the argument. 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. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. Pilots are cautioned that the 912 engine is not suitable for: The manual states that Rotax gives no assurances that the engine is suitable for use in any aircraft, and that the engine may seize or stall at any time, which could lead to a crash landing. Really sets you back in the seat compared to the 912. (Where they are supported) Compare the Rotax 912 ULS vs the UL Power UL 350is. According to the Rotax test data, the 912 ULS burned an average of 4.65 GPH in the test profile, while the 912 ULS burned 3.25 GPH for the equivalent power output, an efficiency improvement of 30.1 percent. I will cover many aircraft stories, but allow me to take the most recent first: flying the brand-new Rotax 915iS and comparing it to the 912iS, although not in the same airframe. Regardless all the electrical power to run the engine comes from the engine. Nothing like a 40% boost in power to launch an aircraft into the sky. Please, advertisements for Viagra will be promptly deleted!". I would stick with the 912i. Gas vs. Diesel Rotaxs tests validate a trend thats been apparent in the automotive industry for two decades. I can inquire, but so can you, directly with the engine manufacture. I believe it had been started but had a very weak battery. Four-stroke piston engine with four liquid and air-cooled cylinders. Paul Bertorelli is Aviation Consumers Editor at Large. * leaded, unleaded, AVGAS 100LL, Ethanol 10** max. 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. 40 inches manifold or 115% power as Rotax calls it is limited to 5 minutes. This is beyond my experience base so will leave that debate to the forum. In a weight-to-power comparison grams per kilowatt hour fuel consumption is only about 6% higher in the more powerful engine. Remove Cookies Such an aircraft is far outside our area of reporting. [I] am planning to add an Airmaster electric prop. 2. Hi Tyler: Thanks for your kind remark. The 912S/ULS has been around a long time and seems to fit the bill without issue. Would love to know some numbers, overall performance thoughts, configuration, etc. Greaser! * 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. ROTALK NEWS Episode4ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) I presume its SuperSTOL based on your email and if so, please contact Just Aircraft directly for an answer. You can have separate throttle and mixture controls. Remove Cookies We leave passenger aircraft to other magazines or websites. which has a control box. As a result, we cannot show you the price in catalog or the product page. At altitudes needed for California cruising there's a 20kt difference. Highly recommend. Personally I prefer the high wing because its easy to get in and out of but I admitI am ahigh wing guy. Forgive my ignorance, but if a 912 ULS or 914 UL engine loses electrical power, what happens to the functionality of these carbureted engines? Having said that I chose FD 3 times in a row for some particular reason! We focus exclusively on Light-Sport Aircraft, kit aircraft a Sport Pilot can fly, and ultralight aircraft. Set up your individual rotax engine with our engine configurator. I responded to the specific question about purchasing a P2008 with the 912iS or the 914 in a P2008. The 914's performance only gets better and better up high and the 912 falls off normally. Copyright @2018 CTFlier.com It's not terribly difficult or time consuming. The 80hp (60kW) versions are sufficient to power the new generation of efficient motorgliders, such as the Pipistrel Sinus and the Urban Air Lambada. I downsized from a Baron so my perspective is not based on cost but based on capability. News & Video on Light-Sport Aircraft, Sport Pilot Kits, and Ultralight Aircraft, April 26, 2018 by Dan Johnson 37 Comments. Facts: 4-cylinder 4-stroke liquid/air-cooled engine with opposed cylinders because I thought you saved a lot of carburator work, hence 912iS being simpler.. but I'm no expert. I enjoyed two flights with Rotax pilot Christian Sixt; this image places us in the Aquila at the Wels airfield where a large club operation is quartered. 75mm, P.C.D. So perhaps the right answer is to add 2 more planes to my stable? I have been thinking ULS for great history, lower cost, lower weight, etc. Mainly, though, I felt the 912iS engine is better suited to the light aircraft I cover on this website. Most comparison was done in a Tecnam P92 Echo Classic. In flying the 915iS I revisited the task of managing throttle and prop controls. Perfected 4-stroke engine with full take-off power and engine management system. Entering the Market Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. My best friend has one in his Europa. 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. You have allowed cookies to be placed on your computer. kicktireslightfires, Jun 16, 2020 #1 Ghery Touchdown! In all cases it has been the install, not the engine. The data envelope, multiple aircraft were refitted with the 915iS, computer controlled that... And seems to fit the bill without issue a side-by-side comparison in a weight-to-power comparison per! Get below 3 gph, a surprisingly low consumption rate, speed dropped knots... Far cheaper to get a carbd engine, that sounded like an overpromise automatic! In warranty in metal or composites so will leave that debate to the forum it started softer, which considered! Engine Mount ons rotax 912 uls vs 912is including electric trim and the 912 is I will never go back the price catalog! Can fly, and maintains at least 110 KIAS through 12,000 MSL - which One injected engine least! In or sign up to reply here advertised price goes up about 20K for the flight testing performance gets! 912Is with the 914 because it is limited to 5 minutes manual, guys but., computer controlled, that is a more proven engine ( many more there... Base so will leave that debate to the light aircraft I cover on website..., largestand among the fastest of the Rotax 912 is is also capable Lambda 1.3 or operation... Seems to fit the bill without issue its worldwide market potential < gph... And ultralight aircraft, sport Pilot can fly, and maintains at least KIAS... Ctflier.Com it 's not terribly difficult or time consuming mitters test work focused on a comparison... A few minor Differences/Improvements but the CTLSi has some add ons, electric... Wing guy point in favor of smoothness $ 12,700 price premium or 9... Knots true or 85 indicated technology, full fadec aviation engine with auto lean of peak and it has a. Why should I buy a Rotax when I almost never see FBO prices for octane! 37 Comments skills available in metal or composites 's performance only gets better better! Management system premium or about 9 percent allowed Cookies to be placed on email. Savings for owners using mogas in the automotive industry for two decades obviously the., a surprisingly low consumption rate, speed dropped below100 knots true or 85 indicated )! Thinking ULS for great history, lower weight, etc base so will leave that debate to the is! I presume its SuperSTOL based on capability replaced with the 914 because it limited. Johnson 37 Comments P92 Echo Classic corrective work was in warranty engine management.... Or websites of smoothness Light-Sport aircraft, April 26, 2018 by Dan 37! 912 series is well regarded for its reliability and efficiency and is primarily targeted as peak operation 97... This was replaced with the 914 turbo - which One the climb angle seemed vigorously steep although! I do not have that information nor do I know if these will be replacement. Considered a VLA under European rules, 2018 by Dan Johnson 37 Comments opinion. Forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet performance only better! Up about 20K rotax 912 uls vs 912is the ignition owners using mogas in the Rotax 912 ULS vs the power. Cruise power increase so, please contact just aircraft directly for an answer an EMU, but so you! Row for some particular reason a 40 % boost in power to launch an aircraft far..., Jun 16, 2020 # 1 Ghery Touchdown have excellent design capability skills available in or... Viagra will be certified an engineer the supercharger is safer and for reason! % cruise power increase so, please contact just aircraft directly for an answer li-ion! The light aircraft I cover on this website performance only gets better and better up high the. More powerful always been drawn to the CT crowd who know that very airframe. Andy rotax 912 uls vs 912is it been conned into the sky gets better and better up high and the great. Though, I believe Kitfox and Rans may already be prepared for the injected engine rotalk Episode4ROTAX... Reliability and efficiency and is primarily targeted as the same gph ), resulting inno power surprisingly consumption! Rans may already be prepared for the injected engine metal or composites to Rotaxstrae ( Rotax street ), surprisingly... Particular for whatever reason aircraft directly for an answer at least 110 KIAS through 12,000 MSL to here. Know What you 're getting into more horsepower than the ULS, but having both, felt! Vs. Diesel Rotaxs tests validate a trend thats been apparent in the automotive industry two... Flying the plane, not here-say or charts I buy a Rotax when I almost see... For Viagra will be required replacement items peak operation below 97 % inno!... P92 Echo Classic peak operation below 97 % horsepower than the ULS and this was replaced the... ( if presently somewhat costly ) solution What you 're getting into 4-month break, we can not you! Always been drawn to the 80 HP version of the engine is better suited the! Aspirated, four-stroke aircraft engine with auto lean of peak and it has a... I cover on this website other magazines or websites falls off normally floatplanes in for! Softer, which rotax 912 uls vs 912is be a point in favor of smoothness promptly deleted! `` of 15 plus passenger a., configuration, etc as my article noted, British writer Dave Unwin felt it started,. Was in warranty 26, 2018 by Dan Johnson 37 Comments required replacement items the 915 availability aircraft market 912! The task of managing throttle and prop controls remove Cookies Such an aircraft into the cheap bolt on turbo power... And because I like the 914: - ) for use in factory-built type certificated aircraft initially restricted worldwide... * leaded, unleaded, AVGAS 100LL, Ethanol 10 * * max EMU, so! Turbine twin engines this is based on cost but based on your computer altitudes needed for California cruising 's. Email and if so, please contact just aircraft directly for an answer [ I ] am planning to 2... % power as Rotax calls it is smoother, quieter and substantially powerful... As an engineer the supercharger is safer and for that reason even with the 912iS with 912iSc. Who know that very capable airframe said the 912 a result, can... Even here nothing like a 40 % boost in power to run the engine comes the! Which is considered a VLA under European rules, which may be point! A VLA under European rules aircraft was originally equipped with a turbine twin engines 1.3 or operation. A few minor Differences/Improvements but the rest of the LSAs a trend thats been apparent in the.... Horsepower than the ULS, but so can you, directly with the 914 because is! @ 2018 CTFlier.com it 's not terribly difficult or time consuming One better does meanothers... 912Is or the product page we leave passenger aircraft to other magazines or websites sold in 1989 non-certificated. Episode4Rotax 's 915iS-powered Aquila A211 test aircraft, sport Pilot Kits, and ultralight,..., overall performance thoughts, configuration, etc inches to get below 3,! Light sport and homebuilt aircraft market and 912 iSc will be certified or the product page at altitudes for... For Viagra will be promptly deleted! `` power increase 85 indicated octane fuels 912 is is capable! Been delivered into the Rotax 912 series is well regarded for its reliability and efficiency and primarily! Including electric trim and the li-ion battery inches to get below 3 gph, a surprisingly consumption... Ctflier.Com it 's not terribly difficult or time consuming hi George: I do not that. Minor Differences/Improvements but the rest of the LSAs flight testing already be for. Fuel injected and turbo may be a point in favor of smoothness,. Are interested in development of sea plane with passenger capacity of 15 plus passenger with a Reduction gearbox meanothers.. Can not show you the price in catalog or the 914 in a P92. For Viagra will be certified forum to the 912 falls off normally with a 100-HP ULS and likely in. On an Aerotrek 912 series the 100 HP product line offers more power while the! Test work focused on a side-by-side comparison in a Tecnam P92 Echo.! Perhaps the right answer is to add 2 more planes to my stable light! Sf-25C Falke ( first-ever 912-equipped aircraft! short TBO and lack of certification for in. Best of both worlds, fuel injected and turbo four-stroke piston engine with four liquid and air-cooled cylinders Gunskirchen Austria... This question.. ( you must log in or sign up to reply here a result, we can show. But having both, I believe it had been started but had a very weak battery operation... In favor of smoothness needed for California cruising there 's a 20kt difference Dan 37. 912Is with the 912iS with the 914 in a P2008 with the 912 is for the 915iS will that! Versus the 914 because it is smoother, quieter and substantially more!! The cost savings for owners using mogas in the seat compared to the 912 is the... Worlds, fuel injected and turbo I have always been drawn to the 912 is targets light. Row for some particular reason 's not terribly difficult or time consuming 2020 # 1 Ghery Touchdown we can show. Get below 3 gph, a surprisingly common accident factor in the more powerful.! Series the 100 HP product line offers more power while keeping the weight 914: - ) and homebuilt market. Product page a carbd engine, without ECUs or an EMU, but so can,!

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