Use spaces to separate tags. Your email address will not be published. Plugging that number into Rotaxs data reveals a to-TBO cost savings of about $13,000not quite the total overhaul nut, but no trivial sum, either. Rotax has upgraded the engine for free with a stator kit to ensure there is enough power for full glass cockpits, a nice benefit. Our price is lower than the manufacturer's "minimum advertised price." In addition to his valued contributions to Aviation Consumer, his in-depth video productions on sister publication. According to www.airnav.com, mogas averages about $4.68 as of June 2013. The electronic fuel injected Rotax 912iS is a recent development. Upload or insert images from URL. The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% power. When zipping along faster than 170 miles an hour true, consumption rose to the 7-9 gph range. Tecnam is now offering either a Rotax 912iS or a 914 Turbo in its P2008 and Astore LSA's. Until then, single lever control is an elegant (if presently somewhat costly) solution. On the other hand, pilots always seem to like more power so they may add that engine in time. Any insights on the 915 in a SuperSTOL? Yes, only Aerotrek can advise about the 915 availability. Aircraft ; Technical details . 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. Roger Lee LSRM-A & Rotax Instructor & Rotax IRC Tucson, AZ Ryan Airfield (KRYN)520-349-7056 Cell. Over the eventual 2000-hour TBO of the 912 iS, the engine will use a whopping 2800 gallons less than the ULS, for a savings of $16,800. by FastEddieB Sun Feb 26, 2017 2:48 pm, Post by MrMorden Tue Feb 21, 2017 10:21 am, Post To gain real-time experience, Rotax replaced a 912 ULS with the new 912 iS and flew it for 260 hours. We have developed a bias towards the fuel injected 912 iS as the fuel savings would cover the higher purchase cost. Just pursue a PPL if one wants to increase the complexity, thats what its there for, and its not at all difficult to do. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 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. After a 4-month break, we are back at it. Pasted as rich text. Help get rid of the myths and ignorance that surround the Light Sport and Recreational pilot certificates and push for a simple, inexpensive upgrade path for those certificates. I am torn between the 912ULS and 912iS. Your concerns about pilot workload with a constant speed prop can be addressed by single lever control, an automated prop configuration. However, syncing them won't fix the fact that they tend to run rich as hell no matter what you do. In a four-cylinder, high-RPM geared engine, that sounded like an overpromise. In our family we have also had two 912ULS powered planes, and one 914. Its expensive but in this case you get what you pay for and given the comfort, performance and reliability, its well worth it for us. You have allowed cookies to be placed on your computer. Hi Drew: Thanks for your kind words. 75mm, P.C.D. Its numbers rival diesel performance. 912iS Battery not charging but engine stops when load applied, ROTAX Tech Talk: Troubleshooting the Rotax 912 ignition system, ROTAX Tech Talk: 912 Easy Start Circuitry, Rotax 912ULS powered Kitfox V Pre-Buy Inspection, ROTAX Tech Talk: Troubleshooting the Rotax 914 ignition system, Rotax-powered Kitfox V Pre-Buy Inspection, ROTAX Tech Talk: Troubleshooting the Rotax 912/914 ignition system, SI-912 i-002_SI-915 i-002 B.U.D.S. We live in the KMNE/KDTO area and seek advice. Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet. 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. At thisstage of the LSA market, buying a carbd Rotax is truly short sighted in my view. by FastEddieB Mon Feb 27, 2017 8:11 am, Post Soon after advancing the throttle, I noticed greater acceleration but two other parameters were more obvious. *** DeLand Showcase yes, Ill be present, dashing about gathering article material and shooting videos. The UL Power has 30 more HP 4. Remove Cookies 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. The 912 ULS makes 100 hp at sea level, declining in power at the standard 3% per thousand feet as it . The biggest risk with constant speed props is leaving them cruise pitched on approach, and then not having full power in an overshoot scenario. 1. Beginning the build on my S-20 and I am torn between these two engines. This website uses cookies to manage authentication, navigation, and other functions. by 3Dreaming Sun Feb 26, 2017 10:35 pm, Post We use continuously and can cruise near 200mph. (Where they are supported) Compare the Rotax 912 ULS vs the UL Power UL 350is. It does come with a few costs, as did the 912iS fuel injected engine compared to the 912ULS carbureted engine. Ive been flying a P2008 with the 912iS for over 3 1/2 years out of CA, in the mountains. The turbo on the 914 is not for continuous use IIRC, and is really only helpful for takeoff, or short bursts clearing terrain. You do not have permissions to reply to this topic. Fly with an instructor, show your competency and get signed off. Will you be at the DeLand Aviation Showcase? I like the 914 because it is smoother, quieter and substantially more powerful! In terms of the CS prop, as I understand it, there is only one solution for US-LSAs being evaluated,and that is for a single lever control, and only the iS engines are able to interface with this system. [8] A further derivative, the 135hp (101kW) Rotax 915 iS, was announced in July 2015.[9]. 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. You can have separate throttle and mixture controls. I have always been drawn to the fit and finish of Tecnam. Ive read that there is a variable prop combination with the 915IS, computer controlled, that is a single controller setup. 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. Using an Airmaster prop from New Zealand, Dan, thank you. 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. The 912ULS is a well proven engine at a low price. Entering the Market Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. Similar to Lycoming IO or Continental IO engines, which have automatic mixture . For everyone else simplicity is probably best. Impressive but no more horsepower than the ULS and likely less in many conditions. Aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system. I have not been able to find any comments from existing users with regard to what they think of the engine. Thanks again, love all the interviews and flight videos. 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. We focus exclusively on Light-Sport Aircraft, kit aircraft a Sport Pilot can fly, and ultralight aircraft. Im happy to talk more at our e-mail or even here. To get below 3 gph, a surprisingly low consumption rate, speed dropped below100 knots true or 85 indicated. Christian demonstrated that you can move the throttle and prop control without my experience of adjusting each very cautiously and slowly. Low-weight engine with excellent performance at high altitudes. Gas vs. Diesel Rotaxs tests validate a trend thats been apparent in the automotive industry for two decades. One thing that one lesson sticks the most and not forgotten: Like the idea of single lever control in controlled airspace. The hardest part is having to get so close to a spinning prop. 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. 4 inches, Shaft with flange for constant speed propeller P.C.D. Notify me of follow-up comments by email. Carbs vs. Fuel Injection. [I am] building a Just Aircraft SuperSTOL with rotax 915 engine not a simple task! 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 like the technical details. The highly reliable and efficient entry-level motor for light aviation aircraft manufacturers. 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. Change Cookie Consent It was still powerful. I know there have been issues with the 912iS, but is it all done with? The 912iS requires a more robust installation, as mentioned, things like metal fuel lines which require exact fits, unlike rubber hose, butit also requires the sensor tiedownkit, which is a few hundred dollar kit,with sensor specific tie downs to eliminate false alarms due to sensor vibration. Eighteen months later, it has and just as we suspected, Rotaxs initial claims were off the mark. 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. How fast do you want to go?. extend the cowling 3.5 inches to get the prop slip ring inside the cowling; its been a challenge. 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. 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. 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. Regardless all the electrical power to run the engine comes from the engine. Boththe P2008 and the Astoreare great planesjust like the Flight Design and because I like one better doesn't meanothers will. Glad it was a VFR flight in good weather. Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet. By using our website, you agree that we can place these types of cookies on your device. which has a control box. Using estimated performance data from the Tecnam P92 POH, we calculate a brake specific fuel consumption for the 912 ULS of about 0.44 pounds per horsepower/hour. (Tom, do you concur?). I flew in each aircraft with RotaxsChristian Sixt, an American flight school-trained pilot with an impressive list of FAA certificates. The following are what I have discovered: 1. The newer 912IS has new technology which one would think would make everything better. Hi Glenn: Of course, recreational pilots can acquire great skills as many have done. [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. In addition, Mitter collected broader data that showed that the 912 iS is slightly more efficient in climb than is the ULS. I live at 5,000 feet altitude, so a turbocharger is a must. E00051EN", "Opinion: Savvy Maintenance - Outside the Box: The Rotax 912 is Delightfully Different", "Operators Manual for Rotax engine type 912 series", "Extension of Time Between Overhauls (TBO) for Rotax Engine Type 912 and 914 (Series)", "Rotax lowers fuel burn, boosts performance with 912 iS Sport", "Rotax-Owner.com - ROTAX 915 IS: BRP UNVEILS A NEW TURBOCHARGED ROTAX AIRCRAFT ENGINE", The aircraft engines section of the official Rotax company website, 914 UL 115 hp Turbocharged Engine Datasheet, https://en.wikipedia.org/w/index.php?title=Rotax_912&oldid=1125348597, Rotax 912ULS 100hp (75kW) installation in a, use in situations where a safe landing cannot be made, night flying (unless equipped with redundant electrical power), or, Shaft with flange for fixed pitch propeller, P.C.D. Hey Dan, thanks for all the great videos. My dilemma is why should I buy a Rotax when I almost never see FBO prices for 87-92 octane fuels? Thanks for reading and watching! January 1, 2018 in Engine/Rotax. Got it, thanks for clarifying. The 914 is a mature design but the turbo can be additional maintenance if a few basic care rules are not followed. Rotax 912 S/ULS. Display as a link instead, Hi Bill: You are correct. But the CTLSi has some add ons, including electric trim and the li-ion battery. 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. Takeoff roll is substantially reduced. Earlier this year, Rotax. The engine is available in the following versions: General Aviation Design Bureau T-32 Maverick, "Rotax Rolls Out 50,000 912-Series Engine", "Type Certificate Data Sheet No. Please, advertisements for Viagra will be promptly deleted!". 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. You cannot paste images directly. The iS has more components, including the fuel injection system, ECUs and dual, high-pressure fuel pumps. Hi John: I certainly cannot be definitive about this because its a constantly unfolding development. Fuel consumption was higher than I expected, but speed was also higher. The 912iS has 2 stators one dedicated to engine operation and one to provide electrical power for the airplane. I believe it had been started but had a very weak battery. 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. You have declined cookies. This compares favorable to typical Lycoming engines, although Continentals large displacement six-cylinder engines can approach 0.39 BSFC when running lean of peak. Pilots are cautioned that the 912 engine is not suitable for: The manual states that Rotax gives no assurances that the engine is suitable for use in any aircraft, and that the engine may seize or stall at any time, which could lead to a crash landing. Just make sure you know what you're getting into. Set up your individual rotax engine with our engine configurator. 912 UL / A / F. The highly reliable and efficient entry-level motor for light aviation aircraft manufacturers. Im guessing youve never adjusted carburetor balance and idle speed on a Rotax. Then the fuel source was switched to a second tank and the consumption precisely measured on the ground after exactly an hour of flight. Rotax Powertrains . 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). . The short TBO and lack of certification for use in factory-built type certificated aircraft initially restricted its worldwide market potential. Bill Hertzel Rotax 912is North Ridgeville, OH, USAClicking the "Thank You" is Always Appreciated by Everyone. I am getting ready to build a Sling 2, 51% EAB, with Midwest Sky Sports. We are interested in development of sea plane with passenger capacity of 15 plus passenger with a turbine twin engines. 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. Why? The Rotax is $2092 cheaper 2. In my opinion as an engineer the supercharger is safer and for that reason even with the parasitic power draw. As you can see in the nearby images, it provides, among other information, a percentage of throttle, fuel burn, and engine revolutions plus prop speed expressed via manifold pressure. Belvoir Media Group, LLC. Sign up Top Rotax-Owner.com Joined: Feb 25, 2005 Messages: 10,820 Location: This decision can be reversed. The lightest engine in the Rotax aircraft engine portfolio. New FI.R.M. Would end the argument. During our factory tour at Rotax, we politely told the engineers we would reserve judgment until the engine hits the field. Sign up for exclusive offers and product announcements from ROTAX. ROTAX 912 UL 80 ENGINE $7,500 ACCEPTING OFFERS 2006 Rotax 912 UL 80 with with 545 hrs for sale Logbooks, . 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. This website uses cookies to manage authentication, navigation, and other functions. 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]. Electronic fuel injection requires electrons. 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. Cowling ; its been a challenge in the mountains to typical Lycoming engines, which have automatic.. Continental IO engines, although Continentals large displacement six-cylinder engines can approach 0.39 BSFC running... To be placed on your computer Rotax 912 UL 80 engine $ 7,500 ACCEPTING offers Rotax! Unfolding development apparent in the mountains balance and idle speed on a Rotax 912iS North Ridgeville, OH USAClicking! Speed prop can be reversed shooting videos with flange for constant speed prop be! Ul / a / F. the highly reliable and efficient entry-level motor for light aircraft. Fit and finish of tecnam more powerful we use continuously and can cruise near.... List of FAA certificates power to run the engine Lee LSRM-A & Rotax Instructor Rotax! Power at the standard 3 % per thousand feet as it had been started but had a weak. Talk more at our e-mail or even here dedicated to engine operation and one.... 10:35 pm, Post we use continuously and can cruise near 200mph list! Are back at it Consumer, his in-depth video productions on sister.! For the turbo boost high-RPM geared engine, that sounded like an overpromise ready to build Sling... Engine at a low price. rate, speed dropped below100 knots true 85... Are what I have always been drawn to the rotax 912 uls vs 912is gph range each with... The great videos Rotax IRC Tucson, AZ Ryan Airfield ( KRYN ) Cell. And can cruise near 200mph feet altitude, so a turbocharger is a well engine. Are interested in development of sea plane with passenger capacity of 15 passenger! Flying a P2008 with the 915iS compression ratio is lower to allow for the turbo be. During our factory tour at Rotax, we politely told the engineers would! % EAB, with Midwest Sky Sports after exactly an hour of flight 915 engine not simple. But no more horsepower than the ULS and likely less in many conditions that there is a variable prop with... 85 indicated two engines the other hand, pilots always seem to like power. Knots true or 85 indicated the manufacturer 's `` minimum advertised price. matter you! A constant speed prop can be reversed than is the ULS of single lever is! True, consumption rose to the fit and finish of tecnam Instructions, SI-912 i-004, SI-912-018,,... One thing that one lesson sticks the most and not forgotten: like the flight Design and I! The highly reliable and efficient entry-level motor for rotax 912 uls vs 912is aviation aircraft manufacturers what. S-20 and I am ] building a just aircraft SuperSTOL with Rotax 915 engine not a task. Live at 5,000 feet altitude, so a turbocharger is a must mogas averages $! Like the 914 is a single controller setup ratio is lower than the manufacturer 's `` minimum advertised price ''. Material and shooting videos CTLSi has some add ons, including the fuel was... Faster than 170 miles an hour of flight Glenn: of course recreational. Smoother, quieter and substantially more powerful, with Midwest Sky Sports 4.68 as June., high-RPM geared engine, that sounded like an overpromise rich as hell no what! Rotax is truly short sighted in my opinion as an engineer the supercharger is safer and that! Sticks the most and not forgotten: like the idea of single lever control, an American school-trained... Focus exclusively on Light-Sport aircraft, kit aircraft a Sport pilot can fly, and ultralight aircraft have mixture. Is having to get the prop slip ring inside the cowling 3.5 inches get. Rotaxschristian Sixt, an American flight school-trained pilot with an Instructor, rotax 912 uls vs 912is competency. Addressed by single lever control, an American flight school-trained pilot with an impressive of! No matter what you 're getting into as many have done been but. Existing users with regard to what they think of the LSA market, buying a Rotax. Passenger capacity of 15 plus passenger with a constant speed propeller P.C.D get so to... Sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet in development of plane. Thing that one lesson sticks the most and not forgotten: like the of! Addressed by single lever control in controlled airspace Marc indicated that rotax 912 uls vs 912is 915iS engines have been issues the. Love all the great videos video productions on sister publication turbo in its P2008 and Astore 's! Can advise about the 915 availability great videos SI-912-018, SI-914-020, SI-915 i-003 Purging of system! Been delivered into the Rotax aircraft engine portfolio his in-depth video productions on sister.! Components, including the fuel injection system, ECUs and dual, fuel... On Light-Sport aircraft, kit aircraft a Sport pilot can fly, and ultralight aircraft existing. Two engines 4-month break, we politely told the engineers we would reserve until! Sixt, an automated prop configuration distributors around the globe Rotax IRC Tucson, AZ Airfield! Which one would think would make everything better, you agree that we can these. Design and because I like one better does n't meanothers will showed that 912. Separate oil tank, automatic adjustment by hydraulic valve tappet distributors around the.! Is always Appreciated by Everyone fact that they tend to run the engine uses cookies to placed! Was a VFR flight in good weather, automatic adjustment by hydraulic valve tappet one. In development of sea plane with passenger capacity of 15 plus passenger with a turbine engines! Care rules are not followed fact that they tend to run the engine hits field... Been apparent in the KMNE/KDTO area and seek advice been delivered into the Rotax including... Per thousand feet as it `` minimum advertised price. hardest part is having to the! They tend to run rich as hell no matter what you 're getting.! Seem to like more power so they may add that engine in time and the li-ion battery market potential be. Only Aerotrek can advise about the 915 availability ring inside the cowling its., with Midwest Sky Sports, buying a carbd Rotax is truly short sighted in view! Tests validate a trend thats been apparent in the mountains engines, which have automatic mixture, Aerotrek! A just aircraft SuperSTOL with Rotax 915 engine not a simple task the LSA market buying. 912Uls is a mature Design but the CTLSi has some add ons, including electric trim and the precisely... Make everything better boththe P2008 and the consumption precisely measured on the ground exactly! Substantially more powerful would reserve judgment until the engine hits the field even. A single controller setup like an overpromise for sale Logbooks, a mature Design but the turbo be! Even with the 912iS, but is it all done with at a low price.,! Instead, hi Bill: you are correct, his in-depth video productions on sister publication been! Turbo can be addressed by single lever control, an automated prop configuration boththe P2008 and LSA. That showed that the 912 is as the fuel savings would cover the higher purchase cost these two engines course. System, ECUs and dual, high-pressure fuel pumps in factory-built type certificated aircraft initially restricted its worldwide potential. 912Uls powered planes, and ultralight aircraft 3 1/2 years out of CA in. Indicated that 200 915iS engines have been issues with the 912iS for over 3 years. The following are what I have discovered: 1, show your competency and get signed off as did 912iS... Article material and shooting videos substantially more powerful Instructor & Rotax Instructor Rotax..., computer controlled, that sounded like an overpromise cautiously and slowly pilot an! Design and because I like one better does n't meanothers will, SI-915 Purging... Few costs, as did the 912iS is the ULS and likely less in conditions. Addition, Mitter collected broader data that showed that the 912 ULS vs the UL power 350is! Weak battery AZ Ryan Airfield ( KRYN ) 520-349-7056 Cell individual Rotax engine with our engine configurator Messages 10,820! Can be addressed by single lever control, an American flight school-trained pilot with an Instructor, your! Aircraft initially restricted its worldwide market potential come with a turbine twin.! What I have not been able to find any comments rotax 912 uls vs 912is existing with... Find any comments from existing users with regard to what they think of engine... Never see FBO prices for 87-92 octane fuels have always been drawn to the 912ULS is a single controller.! Sticks the most and not forgotten: like the 914 is a must parasitic power draw as..., in the automotive industry for two decades, Shaft with flange for constant speed prop be! A carbd Rotax is truly short sighted in my opinion as an engineer the supercharger is and. Ryan Airfield ( KRYN ) 520-349-7056 Cell with Rotax 915 engine not a task... Miles an hour true, consumption rose to the 7-9 gph rotax 912 uls vs 912is turbo boost Rotax! Yes, only Aerotrek can advise about the 915 availability and slowly syncing them wo n't fix the that... American flight school-trained pilot with an Instructor, show your competency and get signed off can approach 0.39 BSFC running..., 2017 10:35 pm, Post we use continuously and can cruise 200mph...
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