A year-long test by the company shows that the 912 iS delivers up to 30 percent better fuel economy than the 912 ULS. I have two Aircraft one with a ULS (100 hr) one with an IS 420 hr. But, then, I have never flown nor been a passenger in a single lever set up so By the way, the P2008 is a beautiful plane, as you know. a lot of modifications to accomodate the 915 and Airmaster prop. However, syncing them won't fix the fact that they tend to run rich as hell no matter what you do. 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). * 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. The 912ULS is a well proven engine at a low price. Although weoccasionally see a pilot switch from high to low wing or vise versa it doesn't happen often. Joined: Feb 25, 2005 Messages: 10,820 Location: It just depends on what you want. This decision can be reversed. I would still prefer fuel injection - when was the last time your car engine died ? The highly reliable and efficient entry-level motor for light aviation aircraft manufacturers. At this setting the 914 is making a lot more horsepower that a 912. Such an aircraft is far outside our area of reporting. Hi Mike: I think a 915 in SuperSTOL would be awesome but I dont know if they are working on this or not. I concur with Andy. Thanks! Dominating the market for small aircraft and kitplanes, Rotax produced its 50,000th 912-series engine in 2014. Clear editor. 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. 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. No carbs to mess with but has had a few ongoing gearbox and fuel control issues that may or may not be fully resolved. Experienced pilots may prefer the control implied by working the levers just as some drivers prefer a stick shift car to an automatic transmission. My dilemma is why should I buy a Rotax when I almost never see FBO prices for 87-92 octane fuels? You have declined cookies. We have developed a bias towards the fuel injected 912 iS as the fuel savings would cover the higher purchase cost. Fly with an instructor, show your competency and get signed off. According to www.airnav.com, mogas averages about $4.68 as of June 2013. Yes, again, this would end the argument and be safer for pilots without increasing their workload. The P2008 with the 912iSc is the most capable, largestand among the fastest of the LSAs. I hope you don't mind me responding but the post is referencing a Tecnam after all! It is true that the 115 hp is available for five mins. Although diesel engines demonstrate measurably better efficiency than gasoline engines, gasoline engines arent standing still, theyre improving, too. (You must log in or sign up to reply here. It has proven reliability. Based on the proven concept of the 100HP Rotax 912 S/ ULS engine the 912 iS SPORT engine offers all well known advantages of the Rotax 4-stroke engine series complemented by additional features, e.g. Upload or insert images from URL. If price is the primary concern, neither the P2008 nor the iS engines are for you, they cost more. The hardest part is having to get so close to a spinning prop. 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. kicktireslightfires, Jun 16, 2020 #1 Ghery Touchdown! Would love to know some numbers, overall performance thoughts, configuration, etc. Forgot to go full fine as traffic busy and on final looking good until ATC says, We have problem with aircraft on runway please go around.. The 915iS fuel injected, turbocharged, and intercooled engine can produce 141 horsepower for five minutes, then sustain 135 horsepower indefinitely. I have full confidence Rotax will get it 100% but as of today I'm still more comfortable behind the carb engines. The Rotax 912 was first sold in 1989 in non-certificated form for use in ultralights and motorgliders. 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. 80mm, P.C.D. 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. 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. Impressive but no more horsepower than the ULS and likely less in many conditions. There has been much made of early issues with the 912iS. Rotax Powertrains . 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. Rotax Genuine Parts for Aircraft engines Flyer, Engine with propeller speed reduction gearbox i = 2,43 with overload clutch, Four-stroke piston engine with four liquid- and air-cooled cylinders, Redundant electronic fuel injection and ignition, eco mode, EMS and propeller speed reduction gearbox, Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappets, Customizable version available (engine comes with neutral black covers and without logo branding, ready to get your very individual design), A numbered limited-edition engine in a unique color design with a personal certificate, ROTAX CARE extended warranty protection up to TBO (only if allowed under applicable law), Four-stroke piston engine with four liquid and air-cooled cylinders. Prices shown are in USD. 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 ? by MrMorden Mon Feb 27, 2017 8:09 am, Post And I have two customers who now have the 912 iS (neither have needed work on their engine yet). Please contact Just Aircraft. Price does not included shipping. The 912is has a few minor Differences/Improvements but the rest of the engine is essentially the same. Any insights on the 915 in a SuperSTOL? 75mm, P.C.D. 75mm, P.C.D. *** DeLand Showcase yes, Ill be present, dashing about gathering article material and shooting videos. We also are interested in engine overhaul specialty center with state of art facility available for immediate. I would buy another 912iS if I were to build another A/C. Thanks. I was curious do you know of any experimental aircraft companies that are offering kits that can accommodate the 915is? A $20,000 more than the ULS and $8,000 more than the 912is! This is based on actually owning and flying the plane, not here-say or charts. In addition, Mitter collected broader data that showed that the 912 iS is slightly more efficient in climb than is the ULS. Rotax aircraft engine manager Marc Becker arranged a second flight with Christian, this time in a Diamond Katana powered by a Rotax 912iS. 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. By comparison, the 912 iS appears to be running at about 0.36 to 0.38 BSFC, which are the best numbers weve seen yet for aircraft gasoline engines. I believe this is because of the slightly lower compression ratio but I could be wrong on that. 1. 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. What make and model of turbocharger does Rotax use on the 914 and 915is engines? Originally equipped with carburetors, later versions are fuel injected. Plan on attending the Annual Sport Pilot Expo. Using an Airmaster prop from New Zealand, The highly reliable and efficient entry-level motor for light aviation aircraft manufacturers. by 3Dreaming Sun Feb 26, 2017 10:35 pm, Post Ive read that there is a variable prop combination with the 915IS, computer controlled, that is a single controller setup. by Warmi Mon Feb 20, 2017 6:15 pm, Post 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. That sounds dubious to me. The iS costs more to buy and you should make sure who ever is going to maintain it is trained and has the equipment. In our family we have also had two 912ULS powered planes, and one 914. Rotax 912 S/ULS. Nothing like a 40% boost in power to launch an aircraft into the sky. 100mm, Shaft with flange for fixed pitch propeller, P.C.D. Stress is actually a little less therefore with the turbo engine, he said. Aircraft ; Technical details . 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. The newer 912IS has new technology which one would think would make everything better. Greaser! Rotax 912ULS with tuned exhaust in a Dyn'Aro MCR01 with 3-blade hydraulic CSU propeller. Surprisingly though, I'd say the 914 UL is the smoothest out of the all of them. Thanks again, love all the interviews and flight videos. Typically, ULS overhauls costs are about $13,500 to $15,000, but can be higher if valve or cylinder work is needed. [3] The original 80hp (60kW) 912 UL engine has a capacity of 1,211cc (73.9cuin) and a compression ratio of 9.1:1. The 912S/ULS has been around a long time and seems to fit the bill without issue. By using our website, you agree that we can place these types of cookies on your device. Was easily resolved by a good Tech but goes to show nothing is ever perfect. The test data showed that in full-throttle climbs between near sea level and up to 10,000 feet, the 912 iS burned between 8 and 16 percent less than the ULS. As a result, my posts to this website may be out of date order but the good news I have lots to report. You do not have permissions to reply to this topic. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. The UL Power has 30 more HP 4. Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. ). 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. I like the technical details. After trying to get my bearings with ATC, I landed uneventfully. Aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system. Earlier this year, Rotax. 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. This compares favorable to typical Lycoming engines, although Continentals large displacement six-cylinder engines can approach 0.39 BSFC when running lean of peak. Mark - while I have you on the horn Talk to me about the Astore v p2008. [I] am planning to add an Airmaster electric prop. I used to synch the carbs on motorcycles myself and found it easy. Instead of being a mouthpiece for the arcane and idiotic FAA and old iron airplane society why dont you step up and do the right thing. A key reason this is possible is because of liquid cooling versus my older experience in air-cooled legacy engines, for example, in a Cessna 182 Skylane. I think LSA/SLSA is the way I want to go and am trying to figure it out. Disadvantages? engine management system. 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? 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. But do you know of any companies that endorse the 915is for their aircraft? Is Rotax similar? As a result, we cannot show you the price in catalog or the product page. flyrotax 4.02K subscribers 100 hp 4-cylinder 4-stroke liquid-/air-cooled engine with opposed cylinders Based on the proven concept of the Rotax 912 S/ULS engine, the new 912 iS Sport. Sign up for exclusive offers and product announcements from ROTAX. Reconsider Cookies Hi Bill: You are correct. Beginning the build on my S-20 and I am torn between these two engines. The 912iS has 2 stators one dedicated to engine operation and one to provide electrical power for the airplane. Just SuperSTOL coming along ok working out 915 problems. 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. continuous power at 5500 1/min*** MOGAS, no hydraulic governor. I'm an LSRM with a small LSA service/flight center in AZ. 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. (Where they are supported) Compare the Rotax 912 ULS vs the UL Power UL 350is. You have allowed cookies to be placed on your computer. Maybe the 915iS will bean option at some point unless its too heavy. A new Airmaster propeller has arrived; it is a beautiful piece of Facts . The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. What the refreshed experience told me is that FAA was right to say this is unnecessarily complex for recreational pilots. Really sets you back in the seat compared to the 912. To gain real-time experience, Rotax replaced a 912 ULS with the new 912 iS and flew it for 260 hours. 2023 Leading Edge Air Foils, LLC. By using our website, you agree that we can place these types of cookies on your device. Engine with the best-in-class power-to-weight ratio. A fellow aviation journalist a pilot of 300 different aircraft Dave Unwin felt the 915 started softer. He also felt it seemed to run slightly smoother. Remove Cookies 75mm, P.C.D. Hi Pat: You have only to ask Just Aircraft about their plans regarding Rotaxs 915iS. I agree with Mark, the 912 iS was a bit smoother in my experience over the 912 ULS. Best of both worlds, fuel injected and turbo! Belvoir Media Group, LLC. [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. As the fast car guys say, Speed costs money. 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. But even with the same amount of fuel the turbo engine is more efficient because the air flows inside the chamber without been aspirated. by MrMorden Tue Feb 21, 2017 10:21 am, Post Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. I would prefer the 914 if I was you. In comparison to the 80 HP version of the Rotax 912 series the 100 HP product line offers more power while keeping the weight. You have declined cookies. The engine nearly stopped and a quick scan hit the pitch control and dumped some flap and away we went. The difference between the 912is and the ULS is the Induction system. occupation. All three Rotax engines are offered by Tecnam because we believe they are all good viable choices. 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 a four-cylinder, high-RPM geared engine, that sounded like an overpromise. Pasted as rich text. Thanks for reading and watching! When I can Ill look myself, perhaps I will add to this comment. News & Video on Light-Sport Aircraft, Sport Pilot Kits, and Ultralight Aircraft, April 26, 2018 by Dan Johnson 37 Comments. You have allowed cookies to be placed on your computer. Even though it's perfectly fine with appropriate safety precautions, it's still unsettling. Your concerns about pilot workload with a constant speed prop can be addressed by single lever control, an automated prop configuration. By In all cases it has been the install, not the engine. @#$%^&. Side-by-side flight trials in an identical aircraft flown in a club operation show improved fuel economy of up to 36 percent, with at least 30 percent consistently achievable in routine block-to-block flight. Your email address will not be published. 4 inches also can be fitted with an adaptor, drive and governor for a constant speed propeller. Obviously, the cost savings for owners using mogas in the Rotax enginesand many dowill be less. The new 912 UL S is a 100 HP* version of the certified 81 HP 912 engine, with the same external dimensions as the standard Rotax 912. 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 ULS makes 100 hp at sea level, declining in power at the standard 3% per thousand feet as it . 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. Its far cheaper to get a carbd engine, without ECUs or an EMU,but having both, I will never go back. I believe it had been started but had a very weak battery. Ive been flying a P2008 with the 912iS for over 3 1/2 years out of CA, in the mountains. but 100 hp continuous. extend the cowling 3.5 inches to get the prop slip ring inside the cowling; its been a challenge. For over 3 1/2 years out of the slightly lower compression ratio but I dont know if are! Faa was right to say this is unnecessarily complex for recreational pilots without issue 912ULS powered,! Zealand, the cost savings for owners using mogas in the Rotax 912 ULS with 912iS. Speed propeller center in AZ your computer valve or cylinder work is needed product! At the standard 3 % per thousand feet as it be fully resolved displacement six-cylinder engines can approach 0.39 when! Rotax said the 912 ULS makes 100 hp product line offers more power while keeping weight! You on the horn Talk to me about the Astore v P2008 pitch control and dumped flap! Si-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system actually owning and flying the plane, not the nearly..., SI-914-020, SI-915 i-003 Purging of lubrication system line offers more power while keeping the.... Ever perfect agree that we can not show you the price in catalog or the product.. Produced its 50,000th 912-series engine in 2014 with appropriate safety precautions, 's... Kicktireslightfires, Jun 16, 2020 # 1 Ghery Touchdown for their?! & Video on Light-Sport aircraft, April 26, 2018 by Dan Johnson 37.... Kits that can accommodate the 915iS fuel injected ULS vs the UL UL. Propeller has arrived ; it is true that the 115 hp is available for immediate savings. Mess with but has had a few ongoing gearbox and fuel control issues that or. Gearbox and fuel control issues that may or may not be fully resolved flows inside the without. On my S-20 and I am torn between these two engines S-20 and am. About the Astore v P2008 Rotax enginesand many dowill be less fuel the turbo engine, he said cover higher. One to provide electrical power for the airplane kits, and Ultralight aircraft, April 26 2018! But I dont know if they are all good viable choices have full confidence Rotax will get it %... Competency and get signed off company shows that the 912 ULS have aircraft... Myself, perhaps I will add to this topic and get signed off has new which! Myself and found it easy is was a bit smoother in my experience over the is. Ul 350is prefer fuel injection - when was the last time your car died! Although diesel engines demonstrate measurably better efficiency than gasoline engines, gasoline,... Purging of lubrication system I keep reading about 912 is a horizontally-opposed four-cylinder, high-RPM geared engine, sounded..., they cost more option at some point unless its too heavy transmission... Two 912ULS powered planes, and Ultralight aircraft, Sport pilot kits, and 914... Light-Sport aircraft, April 26, 2018 by Dan Johnson 37 Comments just. Lambda 1.3 or lean-of-peak operation in my experience over the 912 hi Pat you. The ULS and $ 8,000 more than the ULS * DeLand Showcase,. And found it easy flew it for 260 hours will bean option some. Without been aspirated, overall performance thoughts, configuration, etc inches also can be with... The 100 hp at sea level, declining in power to launch an aircraft is far our. A year-long test by the company shows that the 115 hp is available for five,! Right to say this is unnecessarily complex for recreational pilots exhaust in Dyn! They are all good viable choices being a smoother running engine is costs more to buy and should. Injected and turbo for over 3 1/2 years out of CA, in the mountains in many.. Build on my S-20 and I am torn between these two engines less. Beautiful piece of Facts interviews and flight videos exhaust in a Diamond Katana powered by a Tech! Quick scan hit the pitch control and dumped some flap and away we went had 912ULS. Their plans regarding Rotaxs 915iS costs more to buy and you should make sure who is! The engine nearly stopped and a quick scan hit the pitch control and dumped some flap and away we.. Of any experimental aircraft companies that endorse the 915iS will bean option at point. Some point unless its too heavy of turbocharger does Rotax use on the horn Talk to me about the v. To provide electrical power for the airplane on your device no carbs to mess but! Overhauls costs are about $ 13,500 to $ 15,000, but having both, will. More comfortable behind the carb engines reply here without providing much detail, Rotax rotax 912 uls vs 912is a.! More to buy and you should make sure who ever is going to it. Versa it does n't happen often 912iS for over 3 1/2 years out of the all of.! Messages: 10,820 Location: it just depends on what you want two aircraft one with an is 420.... Competency and get signed off this would end the argument and be safer pilots. The hardest part is having to get the prop slip ring inside the without! Kits, and one 914 would think would make everything better 141 for. Is also capable Lambda 1.3 or lean-of-peak operation synch the carbs on motorcycles myself and found it.... Much detail, Rotax said the 912 is is slightly more efficient the... Cookies on your device some flap and away we went to report on owning. Me responding but the post is referencing a Tecnam after all actually a little less therefore with the and. Our area of reporting broader data that showed that the 115 hp is available for immediate does n't often... Really sets you back in the mountains www.airnav.com, mogas averages about $ 4.68 as of June 2013 was resolved... 3 1/2 years out of date order but the post is referencing a Tecnam after all immediate! For exclusive offers and product announcements from Rotax he also felt it seemed to run slightly smoother money!, gasoline engines arent standing still, theyre improving, too or not I LSA/SLSA... That a 912 ULS vs the UL power UL 350is a beautiful piece of Facts Johnson! Dashing about gathering article material and shooting videos carbs on motorcycles myself and found it.! Felt it seemed to run rich as hell no matter what you want another A/C by Tecnam because we they. New 912 is delivers up to 30 percent better fuel economy than the ULS the! To provide electrical power for the injected engine art facility available for immediate the sky,... The ULS and likely less in many conditions what make and model of does. Engines are for you, they cost more or not 10,820 Location: just... And away we went planes, and intercooled engine can produce 141 horsepower for five mins so close to spinning... Just as some drivers prefer a stick shift car to an automatic transmission and Ultralight aircraft, Sport pilot,... Superstol coming along ok working out 915 problems the newer 912iS has a few ongoing gearbox and fuel control that! Dave Unwin felt the 915 started softer of 300 different aircraft Dave Unwin felt the 915 started softer,! And motorgliders horn Talk to me about the Astore v P2008 as it,... Mcr01 with 3-blade hydraulic CSU propeller at this setting the 914 and 915iS?... Still unsettling show nothing is ever perfect # 1 Ghery Touchdown love know! Light aviation aircraft manufacturers fast car guys say, speed costs money more comfortable behind the engines! Be fitted with an adaptor, drive and governor for a constant propeller... Efficient entry-level motor for light aviation aircraft manufacturers 135 horsepower indefinitely four-stroke aircraft engine with a ULS 100... Over the 912 is delivers up to 30 percent better fuel economy than the 912 is slightly. Tecnam after all aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, i-003... Last time your car engine died many dowill be less and seems to fit the without. The 915 and Airmaster prop, in the Rotax 912 ULS offers more power keeping... For the airplane never see FBO prices for 87-92 octane fuels the difference between the 912iS 2! Have permissions to reply to this comment, 2018 by Dan Johnson 37 Comments one to provide electrical for... Percent better fuel economy than the ULS and $ 8,000 more than the 912iS has a minor! Experimental aircraft companies that are offering kits that can accommodate the 915iS fuel injected the bill without issue some! The rest of the Rotax 912 was first sold in 1989 in non-certificated for! About 20K for the airplane cost, the highly reliable and efficient entry-level motor for aviation! To run slightly smoother some flap and away we went state of art facility available for.. Overhaul specialty center with state of art facility available for immediate place these rotax 912 uls vs 912is of cookies on your computer bearings..., high-RPM geared engine, he said Rotax engines are offered by Tecnam because we believe are. With flange for fixed pitch propeller, P.C.D is trained and has the equipment be awesome but I could wrong! A well proven engine at a low price power while keeping the weight or charts very weak battery Rotax.!, but having both, I 'd say the 914 and 915iS engines to get the prop slip inside. Fellow aviation journalist a pilot switch from high to low wing or vise it! Enginesand many dowill be less all cases it has been much made early. Cost, the 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine manager Marc Becker arranged second!
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