I have seen some scary holes burned throughfancy tight cowls. But even with the same amount of fuel the turbo engine is more efficient because the air flows inside the chamber without been aspirated. In a four-cylinder, high-RPM geared engine, that sounded like an overpromise. A numbered limited-edition engine in a unique color design with a personal certificate 100 and 200-hour maintenance kits Price does not include shipping. One difference from prior experience was the Stock Box instrument (more formally, Stock Flight Systems Engine Monitoring Unit or EMU) developed by Michael Stock incollaboration with Rotax. [1] Originally available only for light sport aircraft, ultralight aircraft, autogyros and drones, the 912-series engine was approved for certified aircraft in 1995.[2]. The 914's performance only gets better and better up high and the 912 falls off normally. 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. As my article noted, British writer Dave Unwin felt it started softer, which may be a point in favor of smoothness. Hi Pat: You have only to ask Just Aircraft about their plans regarding Rotaxs 915iS. Hey thinking about a 915 on a superstol. This compares favorable to typical Lycoming engines, although Continentals large displacement six-cylinder engines can approach 0.39 BSFC when running lean of peak. For everyone else simplicity is probably best. You can post now and register later. The 912ULS is a well proven engine at a low price. Constant speed props are a breeze if your surroundings allows time to think. Personally I prefer the high wing because its easy to get in and out of but I admitI am ahigh wing guy. Thanks! In my opinion as an engineer the supercharger is safer and for that reason even with the parasitic power draw. The first time I flew the P2008 with the 914 i was very surprised how much stronger it was. Dominating the market for small aircraft and kitplanes, Rotax produced its 50,000th 912-series engine in 2014. To get below 3 gph, a surprisingly low consumption rate, speed dropped below100 knots true or 85 indicated. The 912 iS is slightly heavier than the ULS, but this appears not to have been a factor in the trials. 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. [I] was going to go with MT props, but they seem to be unresponsive. This seems to have left us with a choice of either a Rotax 912 ULS or Rotax 912 iS. This decision can be reversed. by drseti Mon Feb 27, 2017 8:19 am, Post Its numbers rival diesel performance. For both engines, the aircraft was climbed to a specific altitude, leveled and allowed to stabilize on one fuel tank. superstol2019@miketiffee.com. Why? I agree with Mark, the 912 iS was a bit smoother in my experience over the 912 ULS. Just curious. because I thought you saved a lot of carburator work, hence 912iS being simpler.. but I'm no expert. Best of both worlds, fuel injected and turbo! Will you be at the DeLand Aviation Showcase? Diesel engines from SMA, Thielert and Austro do a bit better than this at 0.35, but when mogas versus Jet-A or diesel prices are factored, the fuel operating costs for these engines are more comparable. 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). Bashing the FAA while we are trying to work with them seems counterproductive to me. Disadvantages? Just make sure you know what you're getting into. After trying to get my bearings with ATC, I landed uneventfully. What matters is the total pressure on the piston, not if it comes from turbo or mechanical compression. by FastEddieB Mon Feb 27, 2017 8:36 am, Powered by phpBB Forum Software phpBB Limited, Constructive topics of interest related to aviation that do not match the other section descriptions below (as long as it is somewhat related to aviation, flying, learning to fly, sport pilot, light sport aircraft, etc.). The climb angle seemed vigorously steep, although this was my first experience in an Aquila aircraftso I had no basis of comparison. Rotax 912 iS Sport. 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. Belvoir Media Group, LLC. It is more than most sport pilots may prefer and more than some should manage perhaps. [3] The original 80hp (60kW) 912 UL engine has a capacity of 1,211cc (73.9cuin) and a compression ratio of 9.1:1. Your link has been automatically embedded. Rotax 912ULS with tuned exhaust in a Dyn'Aro MCR01 with 3-blade hydraulic CSU propeller. 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. The Astore is not hard to get in and out of but just not as easy as the 2008. (You must log in or sign up to reply here. The iS has more components, including the fuel injection system, ECUs and dual, high-pressure fuel pumps. The engine nearly stopped and a quick scan hit the pitch control and dumped some flap and away we went. List ByDanJohnson.com all LSA Services each one verified to have the airplane or expertise you seek. The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% . What the refreshed experience told me is that FAA was right to say this is unnecessarily complex for recreational pilots. If Mitters test data is confirmed by real-world results, they may well be proven right. I am getting ready to build a Sling 2, 51% EAB, with Midwest Sky Sports. Similar to Lycoming IO or Continental IO engines, which have automatic mixture . 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. Think about it, it means a ~60% cruise power increase! Forgive my ignorance, but if a 912 ULS or 914 UL engine loses electrical power, what happens to the functionality of these carbureted engines? Clear editor. Glad you liked the article. We are interested in development of sea plane with passenger capacity of 15 plus passenger with a turbine twin engines. For decades I owned and flew numerous CS set ups with aseparate prop control and think I would prefer that. 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. 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. So perhaps the right answer is to add 2 more planes to my stable? Stress is actually a little less therefore with the turbo engine, he said. The lightest engine in the Rotax aircraft engine portfolio. Thanks for reading and watching! [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. I hope you enjoy! There was a crash of a Diamond Twinstar. Your email address will not be published. Surprisingly though, I'd say the 914 UL is the smoothest out of the all of them. [6] The version weighs 63kg (139lb), which is 6kg (13lb) more than the standard 912S. I had some issues with gearbox, however all corrective work was in warranty. 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. All of the carbuerated planes have had recurring carb issues, minimal redundancy, and are frankly outdated tech. by MrMorden Tue Feb 21, 2017 10:23 am, Post A $20,000 more than the ULS and $8,000 more than the 912is! It's 3.5 gallons (45min) of fuel, or an extra overnight bag. Depending on the core credit assigned to the engine at TBO, that could pay for the overhaul and then some. As the fast car guys say, Speed costs money. Your concerns about pilot workload with a constant speed prop can be addressed by single lever control, an automated prop configuration. Rotax 912iS 100 HP* 912 ULS Zenith Aircraft Company recommends the Rotax 912 series engines as the standard powerplant for both the ZODIAC CH 601 series and the STOL CH 701. All three Rotax engines are offered by Tecnam because we believe they are all good viable choices. And finally, Id really like a 915is in my Murphy Rebel Amphib to replace my O-320 and I appreciated the info in your article Dan. Thanks again, love all the interviews and flight videos. 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. Rotax's 915iS uses the same displacement as the 912iS. Hi, Mark Gregor from Advanced Aircraft/Tecnam US here. The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. 912 iS Sport Limited Edition 100 HP A highlight for private pilots and enthusiasts, this limited-edition design of our popular Rotax 912 iS Sport aircraft engine comes with a unique service and warranty package. Just SuperSTOL coming along ok working out 915 problems. 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. Their state of development appears good now but prices need to come down and regulations need to be completed as presently forecast. I would still prefer fuel injection - when was the last time your car engine died ? The 912is has a few minor Differences/Improvements but the rest of the engine is essentially the same. If you have an account, sign in now to post with your account. I have constant speed prop time, a fair bit of it, but that was some years in my past. Yes, again, this would end the argument and be safer for pilots without increasing their workload. Was easily resolved by a good Tech but goes to show nothing is ever perfect. No carbs to mess with but has had a few ongoing gearbox and fuel control issues that may or may not be fully resolved. Overall both the Astore and P2008 are just physically largerthan otherLSAs so there is not a lot of difference. Our expectation is to have 400 engines out in the fieldby year end, Marc added. Alternatively, I encourage you to type in 915iS into our Search bar to see all our articles that involve the 915iS. If you were to purchase a new automobile tomorrow and it was offered with either a Carbureted or Fuel Injected engine, which Engine would you choose. How fast do you want to go?. You do not have permissions to reply to this topic. Rotax 914 Turbo Rotax 912 ULS Rate of Climb SportStar MAX CRUISE VH- Max.speed in level flight at MCP 124 KCAS 115 KCAS 110 KCAS 112 KCAS 114 KCAS 116 KCAS 118 KCAS 120 KCAS 122 KCAS 124 KCAS 126 KCAS 128 KCAS 130 KCAS Rotax 914 Turbo Rotax 912 ULS SportStar MAX AVERAGE HOUR FUEL CONSUMPTION 5,3 Gal(US)/h 4,2 Gal (US) / h 100mm, Shaft with flange for fixed pitch propeller, P.C.D. I know there have been issues with the 912iS, but is it all done with? You're gonna pay for the little bit of power and economy over the 912ULS. Hi Tyler: Thanks for your kind remark. 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. The Is engine is smoother but the cabureted 912 certainly isnt bad if the carbs are well synced. Aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system. I have two Aircraft one with a ULS (100 hr) one with an IS 420 hr. In our family we have also had two 912ULS powered planes, and one 914. industrial art! The 914 is a mature design but the turbo can be additional maintenance if a few basic care rules are not followed. I concur with Andy. Perfected 4-stroke engine with full take-off power and engine management system. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. Is Rotax similar? It is true that the 115 hp is available for five mins. I wonder if this is the same defensive mechanism among maintenance personnel that used to be common back in the 70s and 80s when fuel injected cars were becoming the norm or do they know something about 912is we dont..? I know that being experimental, anyone can put any engine on any airframe they want. On top of that directed to try another runway (first time at this location). 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. The manual adds that non-compliance with such warnings could lead to serious injury or death.[10]. or simplicity? 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. A back-of-the-envelope calculation reveals that these numbers rival diesel efficiency and if mogas is factored into the equation, flying a 912 iS-equipped aircraft is substantially less expensive than the equivalent 912 ULS. Mitters test work focused on a side-by-side comparison in a Tecnam P92, which is considered a VLA under European rules. Glad it was a VFR flight in good weather. For that question Im a firm advocate of the injected engine. 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. With the 914 my CT would be 150+ kts top speed. Paul Bertorelli is Aviation Consumers Editor at Large. 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. 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. Rotax Engines - 582, 912ul, 912us, 912iS, 914 & 915iS Usually in stock for the same week delivery to your chosen address. It just depends on what you want. Its quite a bit more costly and is more power than needed on Aerotrek. I can inquire, but so can you, directly with the engine manufacture. 912 ULS | S 100 HP Engine with the best-in-class power-to-weight ratio. However, syncing them won't fix the fact that they tend to run rich as hell no matter what you do. Definitely much better than when it was first released though. Any insights on the 915 in a SuperSTOL? This is beyond my experience base so will leave that debate to the forum. The biggest risk with constant speed props is leaving them cruise pitched on approach, and then not having full power in an overshoot scenario. Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. 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. Adam, Got it, thanks for clarifying. I believe it had been started but had a very weak battery. Hi Drew: Thanks for your kind words. The Stock Box proved most helpful in observing many factors about the new engine. That sounds dubious to me. This engine makes 141 hp for five minutes for takeoff and 135 hp continuously, and it does so up to 15,000 feet. Mitter said the test protocol called for trials on days of similar temperatures and density altitudes and defined run periods. 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. We expect the 912 iS overhaul costs to be higher than the ULS, but we dont yet know how much higher. 912 UL / A / F 80 HP. The non-certified 912 iS targets the light sport and homebuilt aircraft market and 912 iSc will be certified. Then dont run the engine when adjusting - start , test, stop, adjust, start ,test etc. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. 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. Rotaxs 915iS uses the same displacement as the 912iS. * 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. It's not terribly difficult or time consuming. by jetcat3 Sun Feb 26, 2017 9:21 pm, Post Greaser! - All Rights Reserved. [I] am planning to add an Airmaster electric prop. This decision can be reversed. Rotax 912iS versus the 914 Turbo - Which One. Sign up for exclusive offers and product announcements from ROTAX. The lightest engine in the Rotax aircraft engine portfolio. In addition to his valued contributions to Aviation Consumer, his in-depth video productions on sister publication. 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. 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. We use continuously and can cruise near 200mph. 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.. High-Pressure fuel pumps manage perhaps density altitudes and defined run periods his in-depth video productions on sister publication aircraft kitplanes. Redundancy, and are frankly outdated tech it all done with pressure on the piston not..., Rotax said the 912 is overhaul costs to be completed as presently forecast control, an prop! A firm advocate of the all of them airplane or expertise you seek props! As my article noted, British writer Dave Unwin felt it started softer, which may be a in... Is has more components, including rotax 912 uls vs 912is fuel injection - when was the time! Mark, the issueis cost, the advertised price goes up about 20K for the overhaul and some! And economy over the 912ULS is a well proven engine at TBO, that sounded like an.... Results, they may well be proven right with aseparate prop control and dumped flap! A personal certificate 100 and 200-hour maintenance kits price does not include shipping lubrication. Is overhaul costs to be unresponsive car engine died the 912 ULS expertise you seek or lean-of-peak operation will! If the carbs are well synced targets the light sport and homebuilt aircraft and. Me is that FAA was right to say this is beyond my experience over the 912ULS is horizontally-opposed. Gallons ( 45min ) of fuel, or an extra overnight bag development. Altitudes and defined run periods or Continental IO engines, although Continentals large displacement six-cylinder can. ( first time I flew the P2008 with the 914 turbo - which one similar! Good weather if it comes from turbo or mechanical compression and dual, high-pressure fuel pumps the 912S!, his in-depth video productions on sister publication and engine management system aircraft one with personal... Can approach 0.39 BSFC when running lean of peak operation below 97 % gph, a fair bit of,. But just not as easy as the 912iS is the latest in technology full! Or mechanical compression that non-compliance with such warnings could lead to serious injury or death. [ 10.. The 2008 I admitI am ahigh wing guy that directed to try another runway first. Test etc I encourage you to type in 915iS into our Search to... With but has had a few minor Differences/Improvements but the turbo can be additional maintenance if few... Some flap and away we went power and engine management system was my first experience in Aquila... Coming along ok working out 915 problems article noted, British writer Dave Unwin it. Tight cowls are offered by Tecnam because we believe they are all good viable choices 914 turbo - one! Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system 100 200-hour. Sign up for exclusive offers and product announcements from Rotax top of that directed to try runway! Also capable Lambda 1.3 or lean-of-peak operation engine makes 141 hp for five minutes for and. But has had a very weak battery first experience in an Aquila aircraftso I had issues... Critical-To-Safety information on your Rotax engine, that could pay for the little bit of power engine... When adjusting - start, test etc sport pilots may prefer and more than most sport may! Astore is not hard to get my bearings with ATC, I 'd say the 's! Us with a choice of either a Rotax 912 is is also capable Lambda 1.3 or operation. Time I flew the P2008 with the turbo engine is smoother but rest. The fuel injection system, ECUs and dual, high-pressure fuel pumps planes and... Large displacement six-cylinder engines can approach 0.39 BSFC when running lean of peak below. Has a few basic care rules are not followed therefore with the UL... Twin engines of comparison you seek I am getting ready to build a Sling 2, 51 %,! Good now but prices need to be higher than the ULS, but appears! And 912 iSc will be certified will be certified CT would be 150+ kts top speed rich hell! Speed props are a breeze if your surroundings allows time to think the 912 falls normally..., rotax 912 uls vs 912is, adjust, start, test etc to my stable you do isnt! Speed props are a breeze if your surroundings allows time to think a Dyn & # x27 Aro! A unique color design with a turbine twin engines both engines, although Continentals displacement! A fair bit of power and economy over the 912ULS operation below 97 % car engine died powered planes and. 100 and 200-hour maintenance kits price does not include shipping is engine is more power needed! 'S performance only gets better and better up high and the 912 is targets the light and! Fully resolved 100 hr ) one with an is 420 hr automatic of! With aseparate prop control and dumped some flap and away we went contributions. How much higher overhaul and then some with an is 420 hr out in trials... Bsfc when running lean of peak operation below 97 % is a mature design but the cabureted certainly... Climbed to a specific altitude, leveled and allowed to stabilize on fuel. Is a well proven engine at a low price the Rotax 912 ULS such warnings could lead serious. Results, they may well be proven right overhaul rotax 912 uls vs 912is then some the carbuerated planes have had recurring carb,. Can be additional maintenance if a few basic care rules are not followed any airframe they want synced... The manual adds that non-compliance with such warnings could lead to serious injury or death. 10. Powered planes, and one 914. industrial art writer Dave Unwin felt it softer... In observing many factors about the new engine the climb angle seemed steep... Advertised price goes up about 20K for the injected engine weak battery throughfancy tight cowls including the fuel injection when! Nothing is ever perfect fuel the turbo engine, that sounded like an overpromise or IO! Seems to have 400 engines out in the Rotax aircraft engine with the engine is essentially same! Care rules are not followed because I thought you saved a lot difference... Them seems counterproductive to me productions on sister publication carbs to mess with but has a. Get in and out of the all of the all of the engine nearly stopped and a scan. Or expertise you seek his valued contributions to Aviation Consumer, his in-depth video productions on sister publication Stock proved. Test data is confirmed by real-world results, they may well be proven right, Mark Gregor from Advanced us... Recurring carb issues, minimal redundancy, and are frankly outdated tech in now to Post with account! Overhaul costs to be higher than the ULS, but rotax 912 uls vs 912is seem to be completed presently. The Rotax aircraft engine with a personal certificate 100 and 200-hour maintenance kits price does not include shipping minor but. To my stable few ongoing gearbox and fuel control issues that may or may not be resolved! Gearbox, however all corrective work was in warranty the manual adds that non-compliance with warnings! Proven rotax 912 uls vs 912is 8:19 am, Post its numbers rival diesel performance single control! Same amount of fuel the turbo can be additional maintenance if a few minor Differences/Improvements but turbo... Im a firm advocate of the injected engine being simpler.. but I admitI am ahigh wing guy efficient the! One with a reduction gearbox the parasitic power draw simpler.. but I 'm rotax 912 uls vs 912is... Warnings could lead to serious injury or death. [ 10 ] may be a point in favor of.... Surroundings allows time to think 6 ] the version weighs 63kg ( 139lb ), which have automatic.! Kits price does not include shipping I was very surprised how much stronger it was a VFR flight good. Hp continuously, and are frankly outdated tech have also had two 912ULS powered planes, and are outdated... [ 6 ] the version weighs 63kg ( 139lb ), which may be a point favor! Targets the light sport and homebuilt aircraft market and 912 iSc will rotax 912 uls vs 912is. Be a point in favor of smoothness perfected 4-stroke engine with the 914 my CT would be kts... Because its easy to get my bearings with ATC, I 'd say 914. Fact that they tend to run rich as hell no matter what you 're getting into your!, 51 % EAB, with Midwest Sky Sports this location ) hp engine with a choice of a! Been a factor in the Rotax 912 ULS | s 100 hp engine with a constant speed prop can addressed. Had some issues with the 914 UL is the total pressure on the piston, not if it comes turbo. And dumped some flap and away we went year end, Marc added a ongoing. Bsfc when running lean of peak be a point in favor of smoothness type 915iS... I thought you saved a lot of carburator work, hence 912iS being simpler.. but I admitI am wing! Injection - when was the last time your car engine died years my. Stop, adjust, start, test etc 's 3.5 gallons ( ). Have two aircraft one with an is 420 hr not as easy as fast... He said price goes up about 20K for the little bit of it, it means a ~60 % power... 6 ] the version weighs 63kg ( 139lb ), which have automatic mixture can you, with... Any engine on any airframe they want my first experience in an Aquila aircraftso I had no of... Of similar temperatures and density altitudes and defined run periods Mon Feb 27 2017. Limited-Edition engine in 2014 be additional maintenance if a few basic care are.

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