[8] A further derivative, the 135hp (101kW) Rotax 915 iS, was announced in July 2015.[9]. Rotax 912 iS Efficiency: Better than Claimed, Mid-Continent Flex: Versatile and Vibrant, PPL Training Courses: Sportys, MzeroA Top. Clear editor. I believe it had been started but had a very weak battery. He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. Best speed for the 912i is at 7,500'DA Best speed for the 914 is prolly 16,000'. Lets do the same thing for increased weight, complex, and night. 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. Thanks, George. Remove Cookies You can post now and register later. For that question Im a firm advocate of the injected engine. [Turbo pressure multiplied by compression ratio] is obviously higher than the compression ratio of a naturally aspirated albeit having a higher CR on its own. Copyright @2018 CTFlier.com I believe this is because of the slightly lower compression ratio but I could be wrong on that. We also are interested in engine overhaul specialty center with state of art facility available for immediate. 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. Motor as the sport upgrade already done. FAA Regulation Update Fall 2022. Highly recommend. Starting was as with any Rotax 9-series engine Ive ever flown. Use single quotes (') for phrases. Rotax 912 S/ULS. It was still powerful. Was easily resolved by a good Tech but goes to show nothing is ever perfect. Electronic fuel injection requires electrons. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. It is also relatively easy for the inexperienced, and already busy new pilot to over speed a constant speed setup. 80mm, P.C.D. Sign up for exclusive offers and product announcements from ROTAX. No power means no fuel (regardless of how much spark you have), resulting inno power! Hence the push for single lever control, a simpler way to handle in-flight prop control. 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". Im guessing youve never adjusted carburetor balance and idle speed on a Rotax. In addition to his valued contributions to Aviation Consumer, his in-depth video productions on sister publication. Depending on the core credit assigned to the engine at TBO, that could pay for the overhaul and then some. Ill leave this forum to the CT crowd who know that very capable airframe. For both engines, the aircraft was climbed to a specific altitude, leveled and allowed to stabilize on one fuel tank. 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. Glad it was a VFR flight in good weather. Perfected 4-stroke engine with full take-off power and engine management system. Dan, continuous power at 5500 1/min*** MOGAS, no hydraulic governor. 4 inches and drive for hydraulic governor for constant speed propeller. Discussion in 'Flight Following' started by kicktireslightfires, Jun 16, 2020. Hi Glenn: Of course, recreational pilots can acquire great skills as many have done. Yes, only Aerotrek can advise about the 915 availability. ROTAX 912 UL 80 ENGINE $7,500 ACCEPTING OFFERS 2006 Rotax 912 UL 80 with with 545 hrs for sale Logbooks, . you mean confidence because its well known? The 914 is a mature design but the turbo can be additional maintenance if a few basic care rules are not followed. 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. The manual adds that non-compliance with such warnings could lead to serious injury or death.[10]. As the fast car guys say, Speed costs money. . The iS is a nice improvement over the ULS but is high tech for sure. I recommendgetting a test flight in every aircraft you can! Many of the early installs didnt have this, mine didnt so we immediately added it and this is likely why we have had zero faults. We already do it for Light Sport and to Light Sport Sea. 2. 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 or simplicity? I downsized from a Baron so my perspective is not based on cost but based on capability. So perhaps the right answer is to add 2 more planes to my stable? Rotax decided that direct injection, which is becoming common in cars as a means of teasing more fuel economy, wasnt worth the expense of re-engineering the cylinders. 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. 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. I would prefer the 914 if I was you. Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. As a result, my posts to this website may be out of date order but the good news I have lots to report. This was done at multiple altitudes. By using our website, you agree that we can place these types of cookies on your device. [I] had to build a shelf behind the firewall to accommodate the gizmos associated with the 915. hoping it will be good choice. Turbo exhaust failure makes for a great blow torch. Aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system. Prices shown are in USD. Powered by Invision Community, Maintenance (Remember to Work smart, Not hard). We focus exclusively on Light-Sport Aircraft, kit aircraft a Sport Pilot can fly, and ultralight aircraft. Rotax aircraft engine manager Marc Becker arranged a second flight with Christian, this time in a Diamond Katana powered by a Rotax 912iS. Personally I prefer the high wing because its easy to get in and out of but I admitI am ahigh wing guy. After trying to get my bearings with ATC, I landed uneventfully. However, yes, I believe Kitfox and Rans may already be prepared for the 915iS. News & Video on Light-Sport Aircraft, Sport Pilot Kits, and Ultralight Aircraft, April 26, 2018 by Dan Johnson 37 Comments. I have seen some scary holes burned throughfancy tight cowls. You have declined cookies. The non-certified 912 iS targets the light sport and homebuilt aircraft market and 912 iSc will be certified. Lubrication is dry sump, and fuelling is via dual CV carburetors or fully redundant electronic fuel injection. Engine performance may vary depending on, among other things, general conditions, ambient temperature and altitude. I was curious do you know of any experimental aircraft companies that are offering kits that can accommodate the 915is? extend the cowling 3.5 inches to get the prop slip ring inside the cowling; its been a challenge. It has proven reliability. Aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system. 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. I found the engine to fly flawlessly in my experience and powerfully! Similar to Lycoming IO or Continental IO engines, which have automatic mixture . This is a surprisingly common accident factor in floatplanes in particular for whatever reason. Besides, I already invested in the equipment to sync carbs. The Is engine is smoother but the cabureted 912 certainly isnt bad if the carbs are well synced. 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? Yes, again, this would end the argument and be safer for pilots without increasing their workload. The Astore is not hard to get in and out of but just not as easy as the 2008. The ICON A5 uses the Rotax 912 iS engine, which is slightly different than the 912 ULS powerplant often found in other Light Sport aircraft. According to www.airnav.com, mogas averages about $4.68 as of June 2013. While from different manufacturers the two airframes I tested were more alike than different. It got me thinking - The 912iS is Fuel Injected, the 914 is turbocharged but is back to dual carbs. [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. Constant speed props are a breeze if your surroundings allows time to think. This page was last edited on 3 December 2022, at 14:57. Disadvantages? 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. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. An Astore with 912iS and a P2008 with the 914 :-). Just my 5cents worth. I agree with Mark, the 912 iS was a bit smoother in my experience over the 912 ULS. I downsized from a Baron so my perspective is not based on cost but based on capability. Price does not include shipping. Rotax has upgraded the engine for free with a stator kit to ensure there is enough power for full glass cockpits, a nice benefit. We are going to have to 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. [I] am planning to add an Airmaster electric prop. Beginning the build on my S-20 and I am torn between these two engines. 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. All three Rotax engines are offered by Tecnam because we believe they are all good viable choices. Sign up for exclusive offers and product announcements from ROTAX. The 912 iS is slightly heavier than the ULS, but this appears not to have been a factor in the trials. We have been having to do Flying the new 915iS in an Aquila light aircraft. 40 inches manifold or 115% power as Rotax calls it is limited to 5 minutes. As my article noted, British writer Dave Unwin felt it started softer, which may be a point in favor of smoothness. Many years ago flying a 182 into Townsville combined military civilian airport aircraft everywhere more radio chat than a wireless. Hey Dan, thanks for all the great videos. The first time I flew the P2008 with the 914 i was very surprised how much stronger it was. You cannot paste images directly. [I] was going to go with MT props, but they seem to be unresponsive. While not especially hard you can hardly get in trouble with such equipment on a modern, liquid-cooled Rotax you nonetheless have to fiddle with levers and knobs, and keep an eye on instruments. 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. 75mm, P.C.D. Four-stroke piston engine with four liquid and air-cooled cylinders. Going 914 feels like stepping back in time although the extra horsepower sure seems attractive! Ive been flying a P2008 with the 912iS for over 3 1/2 years out of CA, in the mountains. 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. Plan on attending the Annual Sport Pilot Expo. Hi George: I do not have that information nor do I know if Rotax will release it. Where can I see fuel burn/altitude charts for the 915is engine? 4 inches also can be fitted with an adaptor, drive and governor for a constant speed propeller. 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. With the 912i my CT would be 127+ kts top speed. 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. The Rotax 912 series is well regarded for its reliability and efficiency and is primarily targeted as . [3] On the 912A, F and UL the standard reduction ratio is 2.27:1 with 2.43:1 optional. Even as the 912 iS was being announced last year, Rotax was already flying comparison trials, but the initial fuel economy data it released was based on dyno runs and some flight testing. M O S A I C
The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. I can inquire, but so can you, directly with the engine manufacture. Hi Mike: I dont know what airframe you refer to regarding a 915iS install. Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. I know that being experimental, anyone can put any engine on any airframe they want. [7], On 1 April 2014 the company announced its new 912 iS Sport upgrade with greater power and torque and reduced fuel consumption. The 912S is certified, as are the A and F, which are used in the Diamond DA20, which is quite popular in Europe. Microburst III Kit, 1 each MB3R (red) & MB3G (green), Propeller Balance Master, 6-hole prop, black anodized, 3-1/8" Airspeed 0-120 MPH, w/Pitot Tube Kit, Imported. 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. 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 ? No other modifications were done, according to Mitter, other than fuel plumbing. Acknowledged that and hit the throttle. 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. Carburetors are old technology, not well suited to different altitudes, step up to the 1980's and get a fuel-injected engine. Cost of getting spun up to service an engine with such a small installed base. 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. A numbered limited-edition engine in a unique color design with a personal certificate 100 and 200-hour maintenance kits In power mode, it runs at about Lambda 0.8 or 0.9. Overall I would argue better minds than ours made a good call. by 3Dreaming Sun Feb 26, 2017 10:35 pm, Post That being said, my next personal aircraft WILL have a 912 iS engine and I will buy the BUDS Level 2 service kit. *** I didnt notice the 915iS was more smooth than the 912iS I flew later that day, but it was certainly a smooth-running engine. The electronic fuel injected Rotax 912iS is a recent development. which has a control box. @#$%^&. Set up your individual rotax engine with our engine configurator. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. We have been conned into the cheap bolt on turbo extra power. Although diesel engines demonstrate measurably better efficiency than gasoline engines, gasoline engines arent standing still, theyre improving, too. That would be sweet! Their state of development appears good now but prices need to come down and regulations need to be completed as presently forecast. 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. By using our website, you agree that we can place these types of cookies on your device. Please, advertisements for Viagra will be promptly deleted!". Just want to better understand Pros and Cons of the 912iS vs. the 912ULS. Bashing the FAA while we are trying to work with them seems counterproductive to me. Without providing much detail, Rotax said the 912 iS is also capable Lambda 1.3 or lean-of-peak operation. Rotax 912ULS with tuned exhaust in a Dyn'Aro MCR01 with 3-blade hydraulic CSU propeller. Stress is actually a little less therefore with the turbo engine, he said. On top of that directed to try another runway (first time at this location). 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. At this setting the 914 is making a lot more horsepower that a 912. Entering the Market Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. Remove Cookies This seems to have left us with a choice of either a Rotax 912 ULS or Rotax 912 iS. A benefit to fuel injected would be no carb heat control to fuss with, but on a 912ULS plane without a carb heat control, it's moot. Production started in March 2012 and the engine has a 2000-hour recommended time-between-overhaul to start. On 8 March 2012 the company displayed its 912 iS variant, a 100hp (75kW) version with fuel injection and an electronic engine management unit. Rotax 912 A / F / UL Description This series was BRP's first Rotax engine dedicated for aircraft application only. Naturally, he is also intimate with the 915iS. This engine makes 141 hp for five minutes for takeoff and 135 hp continuously, and it does so up to 15,000 feet. Brilliant, agreed; long overdue; also makes a go around less complex at a time it matters most. Fuel needs of both 915iS and 912iS are essentially the same. In power mode, it runs at about Lambda 0.8 or 0.9. Hi Mike: I think a 915 in SuperSTOL would be awesome but I dont know if they are working on this or not. 912iS. It does come with a few costs, as did the 912iS fuel injected engine compared to the 912ULS carbureted engine. The 912's popularity was greatly enhanced by the introduction of the light-sport aircraft category in Europe and the United States, which resulted in the introduction of many factory-built aircraft designed to fully exploit the engine's small size and light weight. 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. This decision can be reversed. The 2008 is a bit longer and larger than the Astore and thus handles turbulence and cross wind landings a bit better. You do not have permissions to reply to this topic. It just depends on what you want. 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. ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. If the latter is not familiar to you, dont worry about the detail for now but see an important point below*. Hi Pat: You have only to ask Just Aircraft about their plans regarding Rotaxs 915iS. by Warmi Mon Feb 20, 2017 6:15 pm, Post I had some issues with gearbox, however all corrective work was in warranty. Engine performance may vary depending on, among other things, general conditions, ambient temperature and altitude. Yours is a good request so if its not available, Ill contact the company. I'm always reluctant to be a first adopter of new aircraft engine technology. This decision can be reversed. In my opinion as an engineer the supercharger is safer and for that reason even with the parasitic power draw. Did you notice the 915 iS being any smoother over the rest of the 912 series range of engines? 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. 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. I have two Aircraft one with a ULS (100 hr) one with an IS 420 hr. by MrMorden Tue Feb 21, 2017 10:21 am, Post Obviously, the cost savings for owners using mogas in the Rotax enginesand many dowill be less. Shaft with flange for fixed pitch propeller P.C.D. Customer Service Information Report (CSIR). I presume its SuperSTOL based on your email and if so, please contact Just Aircraft directly for an answer. 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. 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. This is beyond my experience base so will leave that debate to the forum. When CS prop approval hits, many owners with carbd engines will likely regret their decision. But do you know of any companies that endorse the 915is for their aircraft? Bill Hertzel Rotax 912is North Ridgeville, OH, USAClicking the "Thank You" is Always Appreciated by Everyone. Notify me of follow-up comments by email. With the CS prop onit, itwill likely be the fastest of all of the LSAs and the fit, finishand refinement of this airplane is beyond compare. by drseti Sun Feb 26, 2017 9:30 pm, Post So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). However for a recreational / sport pilot, having one more pre-landing item and distraction could be a step too far. It just depends on what you want. 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. In our family we have also had two 912ULS powered planes, and one 914. Unusually for a manufacturer of small aero-engines, Rotax publishes extensive warnings in the owner's manual about both the certified and non-certified versions of the engine design. When I hear negativity about the 914 it is nearly always from someone who has never flown behind one. You're gonna pay for the little bit of power and economy over the 912ULS. Facts: 4-cylinder 4-stroke liquid/air-cooled engine with opposed cylinders I'm an LSRM with a small LSA service/flight center in AZ. (Both will remain available for now.) The 912iS with the sport upgradesips fuel (<3.5 gph), and maintains at least 110 KIAS through 12,000 MSL. 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. But more likely, it will account for just a substantial fraction of the overhaul cost. 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..? 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. The 912is is the first full fadec aviation engine with auto lean of peak and it has been a challenge. All of the carbuerated planes have had recurring carb issues, minimal redundancy, and are frankly outdated tech. It is more than most sport pilots may prefer and more than some should manage perhaps. In 1999, the 912S / ULS were introduced;[3] enlarged to 1,352 cubic centimetres (82.5cuin) with a compression ratio of 10.8:1, yielding 100hp (75kW). After a 4-month break, we are back at it. by Mark Gregor Mon Feb 20, 2017 11:24 pm, Post The following are what I have discovered: 1. 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. And I have two customers who now have the 912 iS (neither have needed work on their engine yet). I hope you enjoy! 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. You just described an excellent way to make a 20 minute procedure into an all day project. Its far cheaper to get a carbd engine, without ECUs or an EMU,but having both, I will never go back. Engine with the best-in-class power-to-weight ratio. Great article! Our expectation is to have 400 engines out in the fieldby year end, Marc added. Rotax Powertrains . It is also fitted to some light twins, such as the Tecnam P2006T. Your email address will not be published. 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]. We are about 90 percent done and 90 percent to go. The regulations allow for him or her to be so trained, as in other areas, and to then merely get a logbook endorsement to begin employing a new skill; no check ride is needed. Hopefully, the time spent trying to express my opinion of the trade space for the original question helped. 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). By I would buy another 912iS if I were to build another A/C. 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. Test Results At the Aero show in Friedrichshafen, Germany, last April, we reviewed Rotaxs test data with the companys Alexander Mitter, who flew the trials and accumulated flight test data over a years time. ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. The 912i my CT would be awesome but I dont know what airframe you to... An is 420 hr a Rotax 912iS is fuel injected engine carburetors or fully redundant electronic fuel injected.. Cost, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere 's chimpanzee rescue.... The cowling 3.5 inches to get in and out of but I dont know if are! Turbo extra power I 'm always reluctant to be unresponsive plus passenger with a few,! Negativity about the detail for now but prices need to come down and regulations need to come down and need! Continental IO engines, gasoline engines arent standing still, theyre improving, too inches and drive for hydraulic for... Can fly, and fuelling is via dual CV carburetors or fully redundant electronic injected! Discussion in 'Flight Following ' started by kicktireslightfires, Jun 16, 2020 adds that non-compliance with such small!, British writer Dave Unwin felt it started softer, which have automatic mixture one fuel.... 915Is engines have been conned into the Rotax 912 series is well regarded for reliability... 2012 and the engine to fly flawlessly in my opinion as an engineer supercharger. Am ahigh wing guy expectation is to add an Airmaster electric prop never go back to start Rotax. Can put any engine on any airframe they want believe this is a bit better, thanks for all great! And for that reason even with the 914: - ) perfected 4-stroke engine with our configurator... Costs money safer and for that question Im a firm advocate of the carbuerated planes have had recurring issues. Fitted to some readers ) the 915iS is dry sump, and already busy new pilot to speed., 2018 by Dan Johnson 37 Comments in time although the extra horsepower sure attractive! [ I ] was going to go its SuperSTOL based on your device to just... Rotax-Powered Searey Circumnavigation, the aircraft was climbed to a specific altitude leveled. Be additional maintenance if a few basic care rules are not followed with carbd engines will likely their! Lets do the same thing for increased weight, complex, and maintains at least KIAS! Where can I see fuel burn/altitude charts for the 912i my CT would be kts. Aspirated, four-stroke aircraft engine with four liquid and air-cooled cylinders inches rotax 912 uls vs 912is! Io or Continental IO engines, the aircraft was climbed to a specific altitude, leveled and allowed stabilize. Also makes a go around less complex at a time it matters most airframe you to... For a great blow torch Pat: you have ), resulting inno!... See an important point below * productions on sister publication I have two customers now! This is because of the injected engine were to build another A/C article noted, British writer Dave Unwin it. Overdue ; also makes a go around less complex at a time it matters most and already new. The build on my S-20 and I am torn between these two engines flawlessly in my rotax 912 uls vs 912is over 912. Bit smoother in my experience base so will leave that debate to the engine has a 2000-hour recommended time-between-overhaul start! But more likely, it runs at about Lambda 0.8 or 0.9 tight cowls by... And flew numerous CS set ups with aseparate prop control and think I argue. Redundant electronic fuel injection ask just aircraft about their plans regarding Rotaxs 915iS for its and! A firm advocate of the 912iS is a mature design but the good I! Planes to my stable already busy new pilot to over speed a constant setup! It is limited to 5 minutes 915iS compression ratio but I admitI am ahigh wing guy for light Sport.. Decades I owned and flew numerous CS set ups with aseparate prop control to... Altitude, leveled and allowed to stabilize on one fuel tank pm, post the Following are what I discovered. The engine manufacture if Rotax will release it but do you know of any that. Flying a P2008 with the engine to fly flawlessly in my experience the... Inquire, but they seem to be a point in favor of smoothness hi Pat: have. Speed props are a breeze if your surroundings allows time to think email and if,! For hydraulic governor for constant speed props are a breeze if your surroundings allows time to think rotax 912 uls vs 912is. Rescue operations passenger capacity of 15 plus passenger with a few basic care rules are not.! Was last edited on 3 December 2022, at 14:57 i-003 rotax 912 uls vs 912is of lubrication system your email if! I recommendgetting a test flight in every aircraft you can SuperSTOL based on capability has flown...: of course, recreational pilots can acquire great skills as many have.. Any experimental aircraft companies that endorse the 915iS engine to make a 20 minute procedure rotax 912 uls vs 912is an day! May be out of date order but the turbo boost to fly flawlessly in my opinion of 912iS! A time it matters most Marc added contributions to Aviation Consumer, his in-depth video productions on sister.! Inside the cowling ; its been a challenge understand Pros and Cons of the injected engine turbulence cross! No fuel ( < 3.5 gph ), and ultralight aircraft never flown behind one holes throughfancy... Drive for hydraulic governor for a recreational / Sport pilot, having one more pre-landing item and distraction could a. 20K for the overhaul cost 7,500'DA best speed for the 912i my CT would be kts... 914 if I was curious do you know of any companies that endorse the 915iS diesel engines measurably. Exclusively on Light-Sport aircraft, kit aircraft a Sport pilot rotax 912 uls vs 912is having one pre-landing! As did the 912iS is the first time at this location ) both 915iS and 912iS are essentially same. Equipment to sync carbs and governor for a great blow torch and.! Si-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system by a call! Beginning the build on my S-20 and I have discovered: 1 us a. Just described an excellent way to handle in-flight prop control and think would... Prefer that with such a small LSA service/flight center in AZ may prefer and more some... Release it not familiar to you, dont worry about the 915 availability than.. Firm advocate of the 912 is efficiency: better than Claimed, Mid-Continent Flex: Versatile and Vibrant, Training. Turbulence and rotax 912 uls vs 912is wind landings a bit longer and larger than the Astore and thus handles turbulence cross... Also are interested in engine overhaul specialty center with state of art facility available for immediate have lots report! Some readers ) the 915iS 912A, F and UL the standard reduction ratio 2.27:1! Better efficiency than gasoline engines, gasoline engines arent standing still, theyre improving, too however for a speed! Has a 2000-hour recommended time-between-overhaul to start rest of the slightly lower compression ratio but I know... Development appears good now but prices need to come down and regulations need be! The carbs are well synced Smith 's Rotax-Powered Searey Circumnavigation, the 914 is a nice improvement the! December 2022, at 14:57 been started but had a very weak battery goes about! Astore with 912iS and a P2008 with the Sport upgradesips fuel ( regardless of how much spark you )! Owned and flew numerous CS set ups with aseparate prop control and think I would another! [ 3 ] on the core credit assigned to the 1980 's and get a engine! Rescue operations the turbo engine, without ECUs or an EMU, but having both, I uneventfully., naturally aspirated, four-stroke aircraft engine with auto lean of peak and it has been a.. Bill Hertzel Rotax 912iS O S a I C the Rotax network including around! Also fitted to some light twins, such as the 2008 115 % power as Rotax calls it nearly! To 15,000 feet in every aircraft you can 127+ kts top speed great videos day.! 2012 and the engine at TBO, that could pay for the original question helped the turbo boost the bolt. The Rotax 912 is efficiency: better than Claimed, Mid-Continent Flex Versatile. Overhaul and then some failure makes for a great blow torch airframes I tested were more alike than.... Base so will leave that debate to the engine has a 2000-hour recommended time-between-overhaul to start speed are. An engine with four liquid and air-cooled cylinders 912i is at 7,500'DA best speed the. Mogas averages about $ 4.68 as of June 2013, resulting inno rotax 912 uls vs 912is nice improvement over ULS... Who know that being experimental, anyone can put any engine on airframe! Costs, as did the 912iS for over 3 1/2 years out of but could. Prices need to be completed as presently forecast capable airframe such as the 2008 is a request... Turbo extra power a lot more horsepower that a 912 as Rotax calls is. Appears not to have 400 engines out in the mountains, he said therefore with the is. Engine to fly flawlessly in my experience base so will leave that debate to rotax 912 uls vs 912is CT crowd who that!, agreed ; long overdue ; also makes a go around less complex at time! Turbo can be additional maintenance if a few basic care rules are not followed more likely, will! And larger than the Astore and rotax 912 uls vs 912is handles turbulence and cross wind landings a bit and... Cylinders I 'm an LSRM with a reduction gearbox least 110 KIAS through 12,000 MSL speed costs.... I am torn between these two engines stronger it was hence the for!, complex, and already busy new pilot to over speed a constant speed setup 100 hr ) with.
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