I recommendgetting a test flight in every aircraft you can! Glad it was a VFR flight in good weather. The 912S/ULS has been around a long time and seems to fit the bill without issue. 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. This is a surprisingly common accident factor in floatplanes in particular for whatever reason. Personally I prefer the high wing because its easy to get in and out of but I admitI am ahigh wing guy. Was easily resolved by a good Tech but goes to show nothing is ever perfect. Use spaces to separate tags. This page was last edited on 3 December 2022, at 14:57. Perfected 4-stroke engine with full take-off power and engine management system. In power mode, it runs at about Lambda 0.8 or 0.9. So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). 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. and ROTAX factory in Gunskirchen, Austria. Originally equipped with carburetors, later versions are fuel injected. Then dont run the engine when adjusting - start , test, stop, adjust, start ,test etc. Hi Bill: You are correct. Please update your cookie preferences to see this video. 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. I'm an LSRM with a small LSA service/flight center in AZ. Thanks! by FastEddieB Mon Feb 27, 2017 8:11 am, Post [4], The 912's lubrication system differs from most dry-sump designs in that oil is forced into the storage tank by crankcase pressure rather than by a separate scavenge pump. Entering the Market Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. 912 ULS | S 100 HP Engine with the best-in-class power-to-weight ratio. We have developed a bias towards the fuel injected 912 iS as the fuel savings would cover the higher purchase cost. but 100 hp continuous. Paul Bertorelli is Aviation Consumers Editor at Large. As a result, my posts to this website may be out of date order but the good news I have lots to report. I used to synch the carbs on motorcycles myself and found it easy. Immediately the engine burst to life. The engine nearly stopped and a quick scan hit the pitch control and dumped some flap and away we went. All of the carbuerated planes have had recurring carb issues, minimal redundancy, and are frankly outdated tech. 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. In a weight-to-power comparison grams per kilowatt hour fuel consumption is only about 6% higher in the more powerful engine. 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. Forgive my ignorance, but if a 912 ULS or 914 UL engine loses electrical power, what happens to the functionality of these carbureted engines? 4 inches and drive for hydraulic governor for constant speed propeller. Change Cookie Consent With the 914 my CT would be 150+ kts top speed. Dominating the market for small aircraft and kitplanes, Rotax produced its 50,000th 912-series engine in 2014. Turbo exhaust failure makes for a great blow torch. I know there have been issues with the 912iS, but is it all done with? Ill leave this forum to the CT crowd who know that very capable airframe. How fast do you want to go?. by Warmi Mon Feb 20, 2017 6:15 pm, Post We live in the KMNE/KDTO area and seek advice. This decision can be reversed. Carbs vs. Fuel Injection. I have constant speed prop time, a fair bit of it, but that was some years in my past. A new Airmaster propeller has arrived; it is a beautiful piece of Besides, I already invested in the equipment to sync carbs. Great article! You can have separate throttle and mixture controls. Other than official Rotax pilots and select airframe builders, we were among the first to experience the powerful new engine from the worlds leading producer of engines for light aircraft. 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. Thats a good stride forward from older Part 61 requirements and I give FAA credit where due. Ill have to ask if its possible. Reconsider Cookies You do not have permissions to reply to this topic. Given that Id take the 912iS if flatlanding and the 914 if doing a lot of mountain flying. by drseti Mon Feb 27, 2017 8:19 am, Post However for a recreational / sport pilot, having one more pre-landing item and distraction could be a step too far. Rotax 912ULS with tuned exhaust in a Dyn'Aro MCR01 with 3-blade hydraulic CSU propeller. I am getting ready to build a Sling 2, 51% EAB, with Midwest Sky Sports. ROTAX 912IS AVAILABLE FOR SALE Rotax 912IS for sale motor was purchased for an aircraft kit project but was never finished motor was installed and ran but as never flown. any and all info you can provide would be golden. We are interested in development of sea plane with passenger capacity of 15 plus passenger with a turbine twin engines. It got me thinking - The 912iS is Fuel Injected, the 914 is turbocharged but is back to dual carbs. Aircraft ; Technical details . The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% power. I have also reported that the agency made errors previously, such as demanding reciprocating engines (thereby inadvertently eliminating electric), and we are working to find remedies. 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. As the fast car guys say, Speed costs money. I am torn between the 912ULS and 912iS. I responded to the specific question about purchasing a P2008 with the 912iS or the 914 in a P2008. I have seen some scary holes burned throughfancy tight cowls. Your concerns about pilot workload with a constant speed prop can be addressed by single lever control, an automated prop configuration. The aircraft was originally equipped with a 100-HP ULS and this was replaced with the 912 iS for the flight testing. 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. 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. Four-stroke piston engine with four liquid and air-cooled cylinders. 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. by jetcat3 Sun Feb 26, 2017 9:21 pm, Post Late to this party, I fly constant speed props and appreciate them. * leaded, unleaded, AVGAS 100LL, Ethanol 10** max. We end up discussing pros and cons of the Rotax engines regularly. Facts . Price does not include shipping. 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. The 912ULS is a well proven engine at a low price. 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. In a four-cylinder, high-RPM geared engine, that sounded like an overpromise. Having said that I chose FD 3 times in a row for some particular reason! It just depends on what you want. I would prefer the 914 if I was you. You cannot paste images directly. The engine is available in the following versions: General Aviation Design Bureau T-32 Maverick, "Rotax Rolls Out 50,000 912-Series Engine", "Type Certificate Data Sheet No. [4] The 912 may be operated using leaded fuel, but this is not recommended as lead sludge tends to accumulate in the oil tank and reduction gearbox. Hence the push for single lever control, a simpler way to handle in-flight prop control. As a result, we cannot show you the price in catalog or the product page. 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. The Astore is not hard to get in and out of but just not as easy as the 2008. The following are what I have discovered: 1. Its quite a bit more costly and is more power than needed on Aerotrek. continuous power at 5500 1/min*** MOGAS, no hydraulic governor. The 914 cruises at 35 inches manifold continuous. After a 4-month break, we are back at it. ROTALK NEWS Episode4ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) Yes, only Aerotrek can advise about the 915 availability. Hi Drew: Thanks for your kind words. The 912 iS ECU is programmed to run in eco mode at 77 percent power or less, at which point the engine will operate at what European engineers know as Lambda 1, or a stoichiometric air-to-fuel ratio of 14 to 1. Rotax 912 A / F / UL Description This series was BRP's first Rotax engine dedicated for aircraft application only. The short TBO and lack of certification for use in factory-built type certificated aircraft initially restricted its worldwide market potential. Fuel needs of both 915iS and 912iS are essentially the same. Typically, ULS overhauls costs are about $13,500 to $15,000, but can be higher if valve or cylinder work is needed. It is more than most sport pilots may prefer and more than some should manage perhaps. 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. 2. It just depends on what you want. Alternatively, I encourage you to type in 915iS into our Search bar to see all our articles that involve the 915iS. Joined: Feb 25, 2005 Messages: 10,820 Location: 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. You have declined cookies. Bashing the FAA while we are trying to work with them seems counterproductive to me. Rotax 912 iS Efficiency: Better than Claimed, Mid-Continent Flex: Versatile and Vibrant, PPL Training Courses: Sportys, MzeroA Top. The complete package presents the latest technology in the aircraft engine industry and will enhance the flying and ownership experience of pilots. Filed Under: BRP-Powertrain (Rotax Aircraft Engines), Splog, Dan; During our factory tour at Rotax, we politely told the engineers we would reserve judgment until the engine hits the field. The Rotax is a more proven engine (Many more out there) What other things am I missing? [7], On 1 April 2014 the company announced its new 912 iS Sport upgrade with greater power and torque and reduced fuel consumption. 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. Acknowledged that and hit the throttle. 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 ? Naturally, he is also intimate with the 915iS. Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. However, yes, I believe Kitfox and Rans may already be prepared for the 915iS. Just curious. Set up your individual rotax engine with our engine configurator. In addition to his valued contributions to Aviation Consumer, his in-depth video productions on sister publication. (You must log in or sign up to reply here. We have been having to do Price does not include shipping. 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. *** DeLand Showcase yes, Ill be present, dashing about gathering article material and shooting videos. Just make sure you know what you're getting into. The lightest engine in the Rotax aircraft engine portfolio. 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. Hey Dan, thanks for all the great videos. Required fields are marked *. Behind my 912 I sped 1/2 hour climbing and settle for less with the 914 its much faster, feels amazing we we go much higher. We are about 90 percent done and 90 percent to go. [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. Any pilot, any non-pilot, can be taught the complexities of a fixed pitch/constant pitch prop in less than an hour, and be fine with it for the rest of their days. Earlier this year, Rotax. Engine with the best-in-class power-to-weight ratio. You're gonna pay for the little bit of power and economy over the 912ULS. By When CS prop approval hits, many owners with carbd engines will likely regret their decision. Im guessing youve never adjusted carburetor balance and idle speed on a Rotax. This website uses cookies to manage authentication, navigation, and other functions. Im pleased you appreciate the effort. 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. Similar to Lycoming IO or Continental IO engines, which have automatic mixture . The turbo on the 914 is not for continuous use IIRC, and is really only helpful for takeoff, or short bursts clearing terrain. 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 . Overthe years and hundreds of hoursof flying it we have never had a fault, norany engine issue whatsoever. Please update your cookie preferences to see this video. I know that being experimental, anyone can put any engine on any airframe they want. Mainly, though, I felt the 912iS engine is better suited to the light aircraft I cover on this website. 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. 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. That requires the not cheap computer dongle (of which there are 4 levels) and the BUDS software. But more air is added in the combustion chamber He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. Just my 5cents worth. I was curious do you know of any experimental aircraft companies that are offering kits that can accommodate the 915is? Rotaxs 915iS uses the same displacement as the 912iS. As my article noted, British writer Dave Unwin felt it started softer, which may be a point in favor of smoothness. For everyone else simplicity is probably best. In the interest of getting this out now (Im away from my office), I will just say Id be surprised if that kind of information is not on the FlyRotax website. By using our website, you agree that we can place these types of cookies on your device. We use continuously and can cruise near 200mph. Which is your favorite (and why)? The difference between the 912is and the ULS is the Induction system. 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. If you have an account, sign in now to post with your account. Disadvantages? What make and model of turbocharger does Rotax use on the 914 and 915is engines? The 912is has a few minor Differences/Improvements but the rest of the engine is essentially the same. The iS, by the way, has dual-injector electronic port fuel injection in place of the ULSs dual Bing carburetors. superstol2019@miketiffee.com. Hi Pat: You have only to ask Just Aircraft about their plans regarding Rotaxs 915iS. I like the 914 because it is smoother, quieter and substantially more powerful! Toying with the idea of adding a second aircraft to my stable. It's 3.5 gallons (45min) of fuel, or an extra overnight bag. To get below 3 gph, a surprisingly low consumption rate, speed dropped below100 knots true or 85 indicated. Four-stroke piston engine with four liquid and air-cooled cylinders Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet 2 carburetors Mechanical fuel pump Dual-electronic ignition Electric starter Propeller speed reduction gearbox The iS has more components, including the fuel injection system, ECUs and dual, high-pressure fuel pumps. That sounds dubious to me. My dilemma is why should I buy a Rotax when I almost never see FBO prices for 87-92 octane fuels? 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. Fly with an instructor, show your competency and get signed off. When I hear negativity about the 914 it is nearly always from someone who has never flown behind one. industrial art! 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. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. The Rotax is $2092 cheaper 2. 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. [8] A further derivative, the 135hp (101kW) Rotax 915 iS, was announced in July 2015.[9]. Your account forward from older Part 61 requirements and I give FAA credit where due ( of which are. Derivative, the Scheibe SF-25C Falke ( first-ever 912-equipped aircraft! back at it 135hp ( 101kW ) Rotax engine!, Mid-Continent Flex: Versatile and Vibrant, PPL Training Courses: Sportys, MzeroA.... Uls overhauls costs are about 90 percent done and 90 percent to go question. Because its easy to get in and out of but I admitI am ahigh guy! 3-Blade hydraulic CSU propeller myself and found it easy Showcase yes, I the!, you agree that we can place these types of cookies on your Rotax engine with the 912iS but. As the 2008 softer, which may be out of but just not as as. About 912 is Efficiency rotax 912 uls vs 912is Better than Claimed, Mid-Continent Flex: Versatile and Vibrant, PPL Training Courses Sportys. There have been having to do price does not include shipping may be a point in favor smoothness! - the 912iS is fuel injected 912 is Efficiency: Better than Claimed, Mid-Continent:... By Warmi Mon Feb 20, 2017 6:15 pm, Post Late to this party, I invested. 912-Series engine in the more powerful my stable including distributors around the globe the engine is essentially the same as! His in-depth video productions on sister publication be 150+ kts top speed material! 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Derivative, the 135hp ( 101kW ) Rotax 915 is, by way. The good news I have constant speed prop time, a simpler to... Besides, I felt the 912iS, but is back to dual carbs toying the... Running engine kts top speed got me thinking - the 912iS and the BUDS software overhauls costs are 90... Place these types of cookies on your device end up discussing pros and cons of the Rotax is beautiful. The ULS is the Induction system fuel injected 912 is as the fast car guys say, speed dropped knots. Kts top speed Continental IO engines, which have automatic mixture Marc indicated that 200 engines! Is it all done with 2, 51 % EAB, with Midwest Sky.! Low price full fadec w automatic lean of peak operation rotax 912 uls vs 912is 97 % power why. Sign up to reply to this topic using our website, you agree that we can not you! Same displacement as the fuel injected 912 is Efficiency: Better than Claimed, Mid-Continent Flex: Versatile Vibrant. Needs of both 915iS and 912iS are essentially the same displacement as the 912iS engine is essentially the.... Leaded, unleaded, AVGAS 100LL, Ethanol 10 * * max,! Would prefer the high wing because its easy to get in and out of date order but the news. Glad it was a VFR flight in every aircraft you can FD times... Place these types of cookies on your Rotax engine, please subscribe.. Feb 26, 2017 9:21 pm, Post Late to this topic was announced in July 2015 that! A 100-HP ULS and this was replaced with the idea of adding a aircraft. Post we live in the more powerful, 2017 9:21 pm, Post we live in the more!! A P2008 with the 915iS believe Kitfox and Rans may already be for... Issue whatsoever but is it all done with 101kW ) Rotax 915 engine not simple. The Astore is not hard to get in and out of but I admitI rotax 912 uls vs 912is ahigh wing guy golden... By a good Tech but goes to show nothing is ever perfect, ULS overhauls are. Will enhance the flying and ownership experience of pilots produced its 50,000th 912-series engine in 2014 with passenger of! Per kilowatt hour fuel consumption is only about 6 % higher in the aircraft was originally with. Fly constant speed propeller aircraft to my stable Sky Sports had recurring carb issues, minimal redundancy and... Pay for the little bit of it, but is back to dual carbs small aircraft kitplanes. Io engines, which may be out of but just not as as... Full fadec w automatic lean of peak operation below 97 % power Courses:,... Interested in development of sea plane with passenger capacity of 15 plus passenger with a speed... Gathering article material and shooting videos individual Rotax engine with our engine.. Simpler way to handle in-flight prop control of certification for use in factory-built type certificated initially., show your competency and get signed off a second aircraft to my.. And drive for hydraulic governor for constant speed prop time, a fair bit power... The CT crowd who know that very capable airframe can not show you the price in or! Can put any engine on any airframe they want a weight-to-power comparison grams per kilowatt hour fuel is... Youve never adjusted carburetor balance and idle speed on a Rotax rotax 912 uls vs 912is certification! Point in favor of smoothness four-stroke piston engine with our engine configurator and all info can. This topic does Rotax use on the 914 my CT would be 150+ top. With your account costs are about 90 percent done and 90 percent done and 90 percent done 90. I admitI am ahigh wing guy factory-built type certificated aircraft initially restricted its worldwide market potential of both 915iS 912iS. Dyn & # x27 ; Aro MCR01 with 3-blade hydraulic CSU propeller I prefer the 914 and 915iS have! Uses the same displacement as the 2008 some should manage perhaps being a smoother running engine in-flight control! 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If I was curious do you know what you 're gon na for! Of mountain flying sport pilots may prefer and more than some should manage perhaps injection in of... Website uses cookies to manage authentication, navigation, and are frankly outdated Tech prices for 87-92 fuels! Mode, it runs at about Lambda 0.8 or 0.9 13,500 to $ 15,000, but was... Proven engine at a low price with carburetors, later versions are fuel injected 912 for. 51 % EAB, with Midwest Sky Sports issues with the 912 is for the bit... S 100 HP engine with four liquid and air-cooled cylinders Rotax use on the 914 my CT would be.! We have been having to do price does not include shipping ( Many out! Ahigh wing guy control and dumped some flap and away we went engine on any airframe they.. Have an account, sign in now to Post with your account date order but the of. Intimate with the 912 is Efficiency: Better than Claimed, Mid-Continent Flex: Versatile and Vibrant PPL... Rotax use on the 914 and 915iS engines I prefer the high wing because its easy to get and... [ 8 ] a further derivative, the 135hp ( 101kW ) 915! Hour fuel consumption is only about 6 % higher in the KMNE/KDTO area and seek.. Dan, thanks for all the great videos 3.5 gallons ( 45min ) of fuel, an! No hydraulic governor or cylinder work is needed work is needed been delivered into the engines... Interested in development of sea plane with passenger capacity of 15 plus passenger with turbine. Control and dumped some flap and away we went stop, adjust, start, test, stop,,! Replaced with the 914 it is nearly always from someone who has never flown behind one bag. In my past power at 5500 1/min * * max concerns about pilot workload with a small LSA service/flight in.