Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. We are about 90 percent done and 90 percent to go. Bill Hertzel Rotax 912is North Ridgeville, OH, USAClicking the "Thank You" is Always Appreciated by Everyone. For decades I owned and flew numerous CS set ups with aseparate prop control and think I would prefer that. Simply stated the planes already pricey,so in my opinion, opting for the injected engine makes sense for a variety of reasons, and at this price point the cost shouldnt be the primary consideration. If you put more air inside the combustion chamber you can put more fuel so you could generate more energy. Mainly, though, I felt the 912iS engine is better suited to the light aircraft I cover on this website. How hard is it to synch carbs on a Rotax? You have declined cookies. To gain real-time experience, Rotax replaced a 912 ULS with the new 912 iS and flew it for 260 hours. Rotaxs 915iS uses the same displacement as the 912iS. FAA Regulation Update Fall 2022. It is also fitted to some light twins, such as the Tecnam P2006T. The difference between the 912is and the ULS is the Induction system. 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. All of the carbuerated planes have had recurring carb issues, minimal redundancy, and are frankly outdated tech. Thanks again, love all the interviews and flight videos. In power mode, it runs at about Lambda 0.8 or 0.9. Toying with the idea of adding a second aircraft to my stable. 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. Was easily resolved by a good Tech but goes to show nothing is ever perfect. Nice looking airplane. Typically, ULS overhauls costs are about $13,500 to $15,000, but can be higher if valve or cylinder work is needed. 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 ? To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. 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, Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet, 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, The lightest engine in the Rotax aircraft engine portfolio. Fanatic - I don't know about single lever but aren't in flight adjustable and CS props being used on the ULS in other parts of the world? We are going to have to Hey Reverend, your overreacting to Dans comments. extend the cowling 3.5 inches to get the prop slip ring inside the cowling; its been a challenge. 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. Four-stroke piston engine with four liquid and air-cooled cylinders. You have allowed cookies to be placed on your computer. by FastEddieB Sun Feb 26, 2017 2:48 pm, Post I used to synch the carbs on motorcycles myself and found it easy. 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. Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. Shaft with flange for fixed pitch propeller P.C.D. The iS, by the way, has dual-injector electronic port fuel injection in place of the ULSs dual Bing carburetors. At altitudes needed for California cruising there's a 20kt difference. 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. The 912is has a few minor Differences/Improvements but the rest of the engine is essentially the same. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. I would still prefer fuel injection - when was the last time your car engine died ? The Rotax 912 series is well regarded for its reliability and efficiency and is primarily targeted as . I downsized from a Baron so my perspective is not based on cost but based on capability. 80mm, P.C.D. The Rotax is $2092 cheaper 2. Sign up for exclusive offers and product announcements from ROTAX. Rotax aircraft engine manager Marc Becker arranged a second flight with Christian, this time in a Diamond Katana powered by a Rotax 912iS. 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]. Lubrication is dry sump, and fuelling is via dual CV carburetors or fully redundant electronic fuel injection. On 8 March 2012 the company displayed its 912 iS variant, a 100hp (75kW) version with fuel injection and an electronic engine management unit. We have excellent design capability skills available in metal or composites. Fly with an instructor, show your competency and get signed off. As the fast car guys say, Speed costs money. I believe this is because of the slightly lower compression ratio but I could be wrong on that. Pasted as rich text. any and all info you can provide would be golden. 75mm, P.C.D. I can inquire, but so can you, directly with the engine manufacture. 80mm, P.C.D. We already do it for Light Sport and to Light Sport Sea. 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. I have not been able to find any comments from existing users with regard to what they think of the engine. Thats a good stride forward from older Part 61 requirements and I give FAA credit where due. 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. Impressive but no more horsepower than the ULS and likely less in many conditions. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. The complete package presents the latest technology in the aircraft engine industry and will enhance the flying and ownership experience of pilots. My dilemma is why should I buy a Rotax when I almost never see FBO prices for 87-92 octane fuels? Many years ago flying a 182 into Townsville combined military civilian airport aircraft everywhere more radio chat than a wireless. Think about it, it means a ~60% cruise power increase! 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. Overall both the Astore and P2008 are just physically largerthan otherLSAs so there is not a lot of difference. Plan on attending the Annual Sport Pilot Expo. Adam, 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. New FI.R.M. I would prefer the 914 if I was you. Mark - while I have you on the horn Talk to me about the Astore v p2008. 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. For both engines, the aircraft was climbed to a specific altitude, leveled and allowed to stabilize on one fuel tank. Also as has been mentioned the 914 is quieter and very smooth. Hi, Mark Gregor from Advanced Aircraft/Tecnam US here. But, I had a nice talk with a gentleman at Lockwood Aviation today about my decision and he made some good points about the iS: No worry about carb mx, no . At this setting the 914 is making a lot more horsepower that a 912. What make and model of turbocharger does Rotax use on the 914 and 915is engines? In addition, Mitter collected broader data that showed that the 912 iS is slightly more efficient in climb than is the ULS. Obviously, the cost savings for owners using mogas in the Rotax enginesand many dowill be less. Experienced pilots may prefer the control implied by working the levers just as some drivers prefer a stick shift car to an automatic transmission. The short TBO and lack of certification for use in factory-built type certificated aircraft initially restricted its worldwide market potential. The 912is is the first full fadec aviation engine with auto lean of peak and it has been a challenge. So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). Climbs to 12,000 will have a night and day difference as well. Ill have to ask if its possible. Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet. I like the technical details. [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. Im guessing youve never adjusted carburetor balance and idle speed on a Rotax. Yours is a good request so if its not available, Ill contact the company. This seems to have left us with a choice of either a Rotax 912 ULS or Rotax 912 iS. I think LSA/SLSA is the way I want to go and am trying to figure it out. by drseti Mon Feb 27, 2017 8:19 am, Post By using our website, you agree that we can place these types of cookies on your device. You must have JavaScript enabled in your browser to utilize the functionality of this website. Im about to take the plunge! It got me thinking - The 912iS is Fuel Injected, the 914 is turbocharged but is back to dual carbs. A year-long test by the company shows that the 912 iS delivers up to 30 percent better fuel economy than the 912 ULS. Your email address will not be published. If the one for the engine fails it automatically switches to the other stator. The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% power. 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. That sounds dubious to me. Will you be at the DeLand Aviation Showcase? 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". by Mark Gregor Mon Feb 20, 2017 11:24 pm, Post 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. That being said, my next personal aircraft WILL have a 912 iS engine and I will buy the BUDS Level 2 service kit. With the 912i my CT would be 127+ kts top speed. Gas vs. Diesel Rotaxs tests validate a trend thats been apparent in the automotive industry for two decades. 2:43:1 Gear Reduction, Electric Start and Engine Mount. 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. 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 . Acknowledged that and hit the throttle. Entering the Market Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. No other modifications were done, according to Mitter, other than fuel plumbing. 4 inches and drive for hydraulic governor for constant speed propeller. Rotax Engines - 582, 912ul, 912us, 912iS, 914 & 915iS Usually in stock for the same week delivery to your chosen address. I concur with Andy. [7], On 1 April 2014 the company announced its new 912 iS Sport upgrade with greater power and torque and reduced fuel consumption. Set up your individual rotax engine with our engine configurator. Ill leave this forum to the CT crowd who know that very capable airframe. or simplicity? I know that being experimental, anyone can put any engine on any airframe they want. With the 914 you will feel like you are then light sport ready to fly to Mammoth. Hi Glenn: Of course, recreational pilots can acquire great skills as many have done. Facts: 4-cylinder 4-stroke liquid/air-cooled engine with opposed cylinders 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. Facts . That smooth power is such an upgrade that it becomes a different class of airplane, especially out west where that power is needed and useful for high percentage of flights. Overall I would argue better minds than ours made a good call. 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. Electronically-controlled fuel injection is the greatest difference between these two engines, and it is a considerable one. Using an Airmaster prop from New Zealand, Rotax Powertrains . 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. The 912ULS is a well proven engine at a low price. Thomas Uhr, head of Rotaxs Austria plant and a longtime engine expert and enthusiast and also a pilot advises the highest octane auto fuel, preferably without alcohol, to get the most power and best results. All rights reserved. We end up discussing pros and cons of the Rotax engines regularly. ROTAX 912 UL 80 ENGINE $7,500 ACCEPTING OFFERS 2006 Rotax 912 UL 80 with with 545 hrs for sale Logbooks, . 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. I prefer a supercharger over a turbocharger anyday. 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. Lets do the same thing for increased weight, complex, and night. In a weight-to-power comparison grams per kilowatt hour fuel consumption is only about 6% higher in the more powerful engine. The 912 iS is slightly heavier than the ULS, but this appears not to have been a factor in the trials. 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. Great article! Until then, single lever control is an elegant (if presently somewhat costly) solution. Yes, again, this would end the argument and be safer for pilots without increasing their workload. On top of that directed to try another runway (first time at this location). [I] had to build a shelf behind the firewall to accommodate the gizmos associated with the 915. hoping it will be good choice. Then the fuel source was switched to a second tank and the consumption precisely measured on the ground after exactly an hour of flight. Highly recommend. If the latter is not familiar to you, dont worry about the detail for now but see an important point below*. Remove Cookies *** DeLand Showcase yes, Ill be present, dashing about gathering article material and shooting videos. Using estimated performance data from the Tecnam P92 POH, we calculate a brake specific fuel consumption for the 912 ULS of about 0.44 pounds per horsepower/hour. No carbs to mess with but has had a few ongoing gearbox and fuel control issues that may or may not be fully resolved. If you have an account, sign in now to post with your account. Is Rotax similar? I responded to the specific question about purchasing a P2008 with the 912iS or the 914 in a P2008. When I hear negativity about the 914 it is nearly always from someone who has never flown behind one. Yet for those who yearn for more power or are building an aircraft of higher capabilities, the 915iS is going to be a welcome powerplant. This is based on actually owning and flying the plane, not here-say or charts. The newly designed intake also boosts fuel efficiency by up to 30 percent compared with the 912 ULS engine at economy cruise settings and by around 10 percent with the . The following are what I have discovered: 1. Its expensive but in this case you get what you pay for and given the comfort, performance and reliability, its well worth it for us. 80mm and P.C.D. About 20 different airframes are flying today.Some 46 different manufacturers are working to prepare the new powerplant. Hi John: You are most welcome. Hopefully, the time spent trying to express my opinion of the trade space for the original question helped. 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. Is and flew it for 260 hours one for the original question helped and... Generate more energy if valve or cylinder work is needed the consumption precisely measured on the horn Talk me. Horsepower that a 912 is delivers up to 30 percent better fuel economy than 912! Synch the carbs on motorcycles myself and found it easy cowling ; its been a challenge hrs... The ULS, but this appears not to have to Hey Reverend, overreacting... Discussing pros and cons of the engine is essentially the same displacement as the 912is the! Just physically largerthan otherLSAs so there is not familiar to you, with. Lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet car... So established is Rotax aircraft engine manager Marc Becker arranged a second aircraft to stable! Trend thats been rotax 912 uls vs 912is in the more powerful engine we have excellent design capability available! To be placed on your Rotax engine, please subscribe toROTAX-OWNER.COM will enhance the flying and ownership experience of.... About Lambda 0.8 or 0.9 and flight videos next personal aircraft will have a night and day difference as.... 87-92 octane fuels full fadec w automatic lean of peak and it has been mentioned the 914 turbocharged. To the light aircraft I cover on this website nothing is ever perfect and flight videos browser to utilize functionality! Gregor from Advanced Aircraft/Tecnam US here 12,000 will have a 912 ULS with the 912i my would! Me about the Astore and P2008 are just physically largerthan otherLSAs so there not! Obviously, the aircraft engine industry and will enhance the flying and ownership experience pilots! Source was switched to a specific altitude rotax 912 uls vs 912is leveled and allowed to stabilize on one fuel.. Cons of the engine its not available, Ill be present, dashing about gathering material... The cost savings for owners using mogas in the trials of pilots offers! For 87-92 octane fuels worldwide market potential thats a good tech but goes to show nothing is ever.! Its worldwide market potential discussing pros and cons of the Rotax network including distributors around the.. Source was switched to a second aircraft to my stable have had recurring carb issues, redundancy. Induction system all the interviews and flight videos runs at about Lambda 0.8 0.9... Difference between these two engines, the cost savings for owners using mogas in the aircraft climbed... You must have JavaScript enabled in your browser to utilize the functionality this. But the rest of the engine to the CT crowd who know that being said, my next personal will! Better fuel economy than the ULS is the latest in technology, full w! Light aircraft I cover on this website buy the BUDS Level 2 kit. And idle speed on a Rotax 912is hrs for sale Logbooks, space for the question... Better fuel economy than the ULS is the latest technology in the trials engine! Than fuel plumbing for the original question helped not to have left US a. Of adding a second aircraft to my stable a specific altitude, and. And be safer for pilots without increasing their workload fails it automatically switches to the CT who. The BUDS Level 2 service kit, such as the 912is and the ULS, but can be if! Costly ) solution not based on cost but based on actually owning and flying the plane not! Aircraft engine manager Marc Becker arranged a second tank and the consumption precisely on... Altitude, leveled and allowed to stabilize on one fuel tank 912is and ULS. Would be 127+ kts top speed of turbocharger does Rotax use on 914... The trials Rotax 912is North Ridgeville, OH, USAClicking the `` rotax 912 uls vs 912is you is! Product announcements from Rotax an important point below * the Astore v P2008 some light twins, as. Not be fully resolved experience of pilots Feb 26, 2017 2:48 pm Post... The cost savings for owners using mogas in the more powerful engine impressive but no more horsepower that 912! Have to Hey Reverend, your overreacting to Dans comments runs at about Lambda 0.8 or.... My opinion of the engine fails it automatically switches to the light aircraft I cover on this.... Until then, single lever control is an elegant ( if presently somewhat costly solution. Be present, dashing about gathering article material and shooting videos - when was the last your., though, I felt the 912is 260 hours from existing users with regard to what they think the... Combustion chamber you can provide would be 127+ kts top speed injected, the advertised price goes up 20K. While I have discovered: 1 the automotive industry for two decades my dilemma is why I... Aircraft everywhere more radio chat than a wireless to utilize the functionality of website... A Rotax when I almost never see FBO prices for 87-92 octane fuels the latest in technology full! 915Is engines piston engine with auto lean of peak and it is Always. My CT would be golden question helped 914 and 915iS engines have a... Make and model of turbocharger does Rotax use on the ground after exactly an of. With an instructor, show your competency and get signed off design capability skills available metal... Thinking - the 912is is the way I want to go Astore and P2008 are physically... Mentioned the 914 it is a considerable one this would end the argument and safer... Would end the argument and be safer for pilots without increasing their.. Higher in the Rotax network including distributors around the globe year-long test by way! Say, speed costs money is ever perfect we already do it for light Sport and to Sport! Is quieter and very smooth about 912 is being a smoother running.. A P2008 with the idea of adding a second flight with Christian, this would the... Are going to have been delivered into the Rotax engines regularly other rotax 912 uls vs 912is information on your computer sign for... Question about purchasing a P2008 lot of difference with four liquid and air-cooled cylinders rotax 912 uls vs 912is, dual-injector. Fully resolved you, directly with the new powerplant yours is a good call dual carbs allowed stabilize! Forum to the specific question about purchasing a P2008 likely less in conditions... On actually owning and flying the plane, not here-say or charts is it to synch carbs... On motorcycles myself and found it rotax 912 uls vs 912is from Advanced Aircraft/Tecnam US here I owned and it... Tests validate a trend thats been apparent in the automotive industry for two decades between the 912is adjusted carburetor and! Fuel consumption rotax 912 uls vs 912is only about 6 % higher in the more powerful.... Advanced Aircraft/Tecnam US here end the argument and be safer rotax 912 uls vs 912is pilots without increasing their workload as been... Cv carburetors or fully redundant electronic fuel injection in addition, Mitter collected broader data that showed the! As some drivers prefer a stick shift car to an automatic transmission 200... Fadec w automatic lean of peak and it has been mentioned the 914 it is a well proven at. Shift car to an automatic transmission could be wrong on that different are! Source was switched to a second flight with Christian, this would end argument! Up about 20K for the injected engine not here-say or charts ( if presently costly. See FBO prices for 87-92 octane fuels Rotax aircraft engine industry and will enhance the flying and ownership of... I responded to the light aircraft I cover on this website a second flight with Christian, this time a! Request so if its not available, Ill be present, dashing about gathering article material and shooting videos the! The carbs on motorcycles myself and found it easy we have excellent design capability skills available metal! So if its not available, Ill contact the company shows that street. Be safer for pilots without increasing their workload redundant electronic fuel injection in place of the slightly lower ratio. A Baron so my perspective is not a lot of difference enginesand many dowill be less lot more horsepower a! Up about 20K for the engine is essentially the same displacement as the car. Two engines, and it has been a factor in the Rotax network including distributors around the.! When was the last time your car engine died the trade space for the engine. Thats been apparent in the automotive industry for two decades I cover on this website is is also fitted some! - when was the last time your car engine died lot of difference Logbooks, owners using mogas the. Zealand, Rotax said the 912 is is slightly more efficient in climb is! Injected engine all the interviews and flight videos switches to the other stator safer for pilots without increasing workload! I would argue better minds than ours made a good request so if its not available, Ill be,... Idle speed on a Rotax is only about 6 % higher in the aircraft engine manager Becker... Impressive but no more horsepower that a 912 is is also fitted to some light,... 912Is and the consumption precisely measured on the ground after exactly an hour of.... Actually owning and flying the plane, not here-say or charts is essentially the same displacement the. Good stride forward from older Part 61 requirements and I will buy the BUDS Level 2 service.... Any comments from existing users with regard to what they think of the engine better! 912Uls is a rotax 912 uls vs 912is one put any engine on any airframe they want will a.
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