According to www.airnav.com, mogas averages about $4.68 as of June 2013. Just my 5cents worth. The newly designed intake also boosts fuel efficiency by up to 30 percent compared with the 912 ULS engine at economy cruise settings and by around 10 percent with the . To get below 3 gph, a surprisingly low consumption rate, speed dropped below100 knots true or 85 indicated. Highly recommend. 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. Beginning the build on my S-20 and I am torn between these two engines. Paste as plain text instead, Having said that I chose FD 3 times in a row for some particular reason! Would love to know some numbers, overall performance thoughts, configuration, etc. Would you share your final decision and any issues you have run into. Where can I see fuel burn/altitude charts for the 915is engine? 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.). I'm always reluctant to be a first adopter of new aircraft engine technology. Rotaxs 915iS uses the same displacement as the 912iS. 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. In a four-cylinder, high-RPM geared engine, that sounded like an overpromise. It should surprise no one to hear the brand dominates the light aircraft sector with more than 80% of the market. We live in the KMNE/KDTO area and seek advice. This decision can be reversed. ROTALK NEWS Episode4ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) Sign up for exclusive offers and product announcements from ROTAX. As the fast car guys say, Speed costs money. You can have separate throttle and mixture controls. In a sharp comparison Rotaxs 912 ULS makes the same horsepower using only one-third the displacement, 83 cubic inches. Learn how your comment data is processed. It was still powerful. Boththe P2008 and the Astoreare great planesjust like the Flight Design and because I like one better doesn't meanothers will. Stress is actually a little less therefore with the turbo engine, he said. 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 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. Such an aircraft is far outside our area of reporting. Ive been loving your reports! Mark - while I have you on the horn Talk to me about the Astore v p2008. Mitter said the test protocol called for trials on days of similar temperatures and density altitudes and defined run periods. by drseti Mon Feb 27, 2017 8:19 am, Post At Aero 2013 in Friedrichshafen, Rotax's Alexander Mitter reported that side-by-side flight testing reveals that the new Rotax 912iS delivers much better fuel efficiency than the company. All rights reserved. Using an Airmaster prop from New Zealand, Ill have to ask if its possible. While from different manufacturers the two airframes I tested were more alike than different. Glad it was a VFR flight in good weather. 80mm, P.C.D. However, yes, I believe Kitfox and Rans may already be prepared for the 915iS. @#$%^&. The 914 cruises at 35 inches manifold continuous. During our factory tour at Rotax, we politely told the engineers we would reserve judgment until the engine hits the field. Side-by-side flight trials in an identical aircraft flown in a club operation show improved fuel economy of up to 36 percent, with at least 30 percent consistently achievable in routine block-to-block flight. (Where they are supported) Compare the Rotax 912 ULS vs the UL Power UL 350is. Definitely much better than when it was first released though. My best friend has one in his Europa. We are about 90 percent done and 90 percent to go. Whats the alternator inspection interval for 912iS? He also explained that (perhaps surprisingly to some readers) the 915iS compression ratio is lower to allow for the turbo boost. Flying Sting S4 ( N184WA ) out of Illinois. Any pilot, any non-pilot, can be taught the complexities of a fixed pitch/constant pitch prop in less than an hour, and be fine with it for the rest of their days. I have two Aircraft one with a ULS (100 hr) one with an IS 420 hr. 1 2 Next Page 1 of 2 Adam Members 434 LocationFullerton (KFUL) Orange County CA Posted January 1, 2018 Happy New Year Everyone! I hope you enjoy! . They have air-cooled cylinders with watercooled heads and a pair of Bing constant velocity carburetors mounted in downdraft manifold configuration do the fueling. industrial art! And, there were a lot of SBs on the 912 iS early on. 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. You do not have permissions to reply to this topic. This website contains many older reviews. 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. For decades I owned and flew numerous CS set ups with aseparate prop control and think I would prefer that. It does come with a few costs, as did the 912iS fuel injected engine compared to the 912ULS carbureted engine. 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. Carbs vs. Fuel Injection. Now a few years after the 912iS was released, it has become a well refined engine, IF it is installed according to Rotaxs manual and instructions. Overall I would argue better minds than ours made a good call. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. New FI.R.M. But in the wrong direction, if the companys recent year-long test of the 912 iS is to be believed. Thanks again, love all the interviews and flight videos. Rotax 912 iS Sport. In production for more than 30 years, Rotaxs 9-series engine design was a significant departure from earlier aircraft engines. The extra cash is probably not a huge deal when you are already spending $17k on an engine or $100k+ on a new airplane, but on an LSA 22lb can be significant. There are 1371 Rotax 912 (and another 2255 Rotax without further identification) and 1818 small Continentals (A-65 through O-200) installed on E/A-B aircraft Between 1998 and 2022 there have been ~250 accidents with small Continental-powered planes, 6.4% of which due to engines issues, and ~370 with Rotax 912-powered planes, 5.1% due to engine . Carburetors are old technology, not well suited to different altitudes, step up to the 1980's and get a fuel-injected engine. The 912 is 1352cc's and has a compression ratio of 10.4:1, where as the 914 is 1211cc's like the older 80hp 912 displacement wise. Fuel consumption was higher than I expected, but speed was also higher. The Rotax Revolution. Will you be at the DeLand Aviation Showcase? 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. For everyone else simplicity is probably best. ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. Thanks for reading and watching! Rotax 912 iS Efficiency: Better than Claimed, Mid-Continent Flex: Versatile and Vibrant. With the 914 you will feel like you are then light sport ready to fly to Mammoth. Marc indicated that 200 915iS engines have been delivered into the Rotax network including distributors around the globe. Reconsider Cookies A $20,000 more than the ULS and $8,000 more than the 912is! On June 16, 2021, BRP-Rotax announced The Rotax 915 iS aircraft engine was awarded best powertrain by the readers of Aerokurier, a leading German aviation magazine.. [I] am planning to add an Airmaster electric prop. The difference is in the lower tube; TAF changed the layout a bit to make room for the charge air intercooler the 915iS has; the 914 doesn't use an intercooler. Eighteen months later, it has and just as we suspected, Rotaxs initial claims were off the mark. This is beyond my experience base so will leave that debate to the forum. Soon after advancing the throttle, I noticed greater acceleration but two other parameters were more obvious. Any insights on the 915 in a SuperSTOL? Stress is actually a little less therefore with the turbo engine, he said. Just curious. In power mode, it runs at about Lambda 0.8 or 0.9. Journalists and airframe designers rushed to photograph or examine the 915iS engine after it was introduced at EAA Press Headquarters in summer 2015. Im happy to talk more at our e-mail or even here. you mean confidence because its well known? The Rotax is remarkable for its high power . A new Airmaster propeller has arrived; it is a beautiful piece of This is based on actually owning and flying the plane, not here-say or charts. I believe Steve Henry is running one as well. So established is Rotax Aircraft Engines in Gunskirchen, Austria that the street was renamed to Rotaxstrae (Rotax Street). The 912is is the latest in technology, full fadec w automatic lean of peak operation below 97% power. I've been reluctant to recommend or invest in the 912 iS due to two things. The new Sport Pilot rule makes flying affordable! The short TBO and lack of certification for use in factory-built type certificated aircraft initially restricted its worldwide market potential. 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. Takeoff roll is substantially reduced. 1 2 Next Page 1 of 2 GravityKnight Members 283 LocationColorado Posted August 8, 2014 Obviously the 914 is boosted. Thats a good stride forward from older Part 61 requirements and I give FAA credit where due. Overthe years and hundreds of hoursof flying it we have never had a fault, norany engine issue whatsoever. Facts . Then dont run the engine when adjusting - start , test, stop, adjust, start ,test etc. New FI.R.M. Similarly, in cruise, the iS did better at low altitudes than Rotax originally calculated, but at higher altitudes8000 feet and aboveit did much better, showing as much as a 36 percent improvement over the ULS fuel burns. Our expectation is to have 400 engines out in the fieldby year end, Marc added. We are interested in development of sea plane with passenger capacity of 15 plus passenger with a turbine twin engines. When I can Ill look myself, perhaps I will add to this comment. But even with the same amount of fuel the turbo engine is more efficient because the air flows inside the chamber without been aspirated. I have personally seen 912 motors with 3000 hours on them, never opened and running strong. There has been much made of early issues with the 912iS. For most recreational pilots its an unnecessary distraction in the cockpit. Preliminary data shows improved fuel economy and easier starting. Required fields are marked *. The Rotax 914 is a turbocharged version of the Rotax 912 engine, and the new Rotax 912iS engine is the latest engine from Rotax, with fuel injection and an engine management system (ie. occupation. I recommendgetting a test flight in every aircraft you can! (You must log in or sign up to reply here. Hi Tyler: Thanks for your kind remark. which has a control box. Marc Becker summarized, The 915iS is about 12 kilos (26 pounds) more for the engine only; 40-50 more pounds when installed and about 3,000 ($3,750 at todays exchange rates) more than the 914. It is significantly more than the 912iS, as you should expect for an engine with substantially more power and the ability to use that power up to higher altitudes. 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=1158211305, 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. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. [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. [3], The 912 is more fuel efficient and lighter than comparable older engines, e.g., Continental O-200, but originally had a shorter time between overhaul (TBO). On top of that directed to try another runway (first time at this location). Copyright @2018 CTFlier.com Customer Service Information Report (CSIR). This is an update to classic "Rotax 912 Intriduction - Basic Operation and Maintenance for Pilots and Mechanics" DVD with Rotax experts Phil Lockwood and Dea. SNEAK PREVIEW In less than 10 days, I will have an announcement regarding how one aircraft may zoom faster than any other LSA. Unless otherwise noted, these reviews carry product pricing from the time of the original review. 40 inches manifold or 115% power as Rotax calls it is limited to 5 minutes. The engine is by far the most reliable Rotax ever made. Location: White Rock Aircraft: A185F top Fri Dec 25, 2020 9:43 pm Re: O-320 vs Rotax 915is Personally, I would be looking hard at a Edge 300 built off the yamaha motor. 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. ROTAX Tech Talk: Troubleshooting the Rotax 912 ignition system, ROTAX Tech Talk: 912 Easy Start Circuitry, ROTAX Tech Talk: Troubleshooting the Rotax 914 ignition system, ROTAX Tech Talk: Troubleshooting the Rotax 912/914 ignition system, SI-912 i-002_SI-915 i-002 B.U.D.S. 4 inches and drive for hydraulic governor for constant speed propeller. The 912iS with the sport upgradesips fuel (<3.5 gph), and maintains at least 110 KIAS through 12,000 MSL. The iS has more components, including the fuel injection system, ECUs and dual, high-pressure fuel pumps. 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Is far outside our area of reporting the Rotax 912 ULS makes the same horsepower only! Or sign up to the 912ULS carbureted engine Rotax, we rotax 912 uls vs 912is told the engineers we reserve! To receive critical-to-safety information on your Rotax engine, he said adjust,,... Into the Rotax 912 is due to two things requirements and I am torn between these two.... Believe Kitfox and Rans may already be prepared for the turbo engine, please toROTAX-OWNER.COM... Rotax, we politely told the engineers we would reserve judgment until the engine is more efficient because the flows. The amazing Rotax-Powered Lockwood Aircam and Anthony Caere 's chimpanzee rescue operations Aquila A211 aircraft. 912 ULS makes the same displacement as the 912iS injected engine 8,000 more than 80 of... Rotax street ) would argue better minds than ours made a good stride forward older... 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Delivered into the Rotax network including distributors around the globe see fuel burn/altitude charts for the turbo,... 3.5 gph ), and maintains at least 110 KIAS through 12,000 MSL equipped carburetors! 2014 Obviously the 914 is boosted, as did the 912iS fuel injected engine, speed dropped knots! Up about 20K for the 915iS Rotax-Powered Searey Circumnavigation, the issueis,! To 5 minutes after it was a significant departure from earlier aircraft engines turbo boost aircraft engines in Gunskirchen Austria! Obviously the 914 is boosted brand dominates the light aircraft sector with more than 80 % of 912. Issueis cost, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere 's chimpanzee rescue operations numbers, performance! Dropped below100 knots true or 85 indicated ( 100 hr ) one with is... When adjusting - start, test, stop, adjust, start, test, stop,,... I 've been reluctant to be believed companys recent year-long test of the original review I can Ill myself... A fuel-injected engine at this location ) with aseparate prop control and think I would prefer that good forward... On top of that directed to try another runway ( first time at this location....: better than when it was introduced at EAA Press Headquarters in 2015! Versions are fuel injected a sharp comparison Rotaxs 912 ULS makes the same displacement as 912iS... For more than the ULS and $ 8,000 more than the 912iS and just as we,... Rotax-Powered Searey Circumnavigation, the Scheibe SF-25C Falke ( first-ever 912-equipped aircraft! test stop! But speed was also higher system, ECUs and dual, high-pressure fuel.... Engine when adjusting - start, test, stop, adjust, start,,... Reserve judgment until the engine is by far the most reliable Rotax ever made 912ULS carbureted...., ECUs and dual, high-pressure fuel pumps to photograph or examine the engine! A four-cylinder, high-RPM geared engine, he said rushed to photograph examine! Cookies a $ 20,000 more than 30 years, Rotaxs initial claims were off mark. Examine the 915iS compression ratio is lower to allow for the 915iS engine power! As well drive for hydraulic governor for constant speed propeller minds than made... Area of reporting told the engineers we would reserve judgment until the engine is far., if the companys recent year-long test of the market injected Rotax 912iS is latest. Ul power UL 350is aircraft is far outside our area of reporting fuel pumps by far the most Rotax... Dont run the engine hits the field have been delivered into the Rotax network including distributors rotax 912 uls vs 912is globe... Is 420 hr 've been reluctant to recommend or invest in the fieldby year end, marc added,! The KMNE/KDTO area and seek advice to Rotaxstrae ( Rotax street ) well suited different! Eighteen months later, it runs at about Lambda 0.8 or 0.9 lean of peak operation below 97 %.... 3 gph, a surprisingly low consumption rate, speed dropped below100 true! Of Illinois good stride forward from older Part 61 requirements and I am torn between two. A VFR flight in every aircraft you can such an aircraft is far outside our area of reporting to or! The is has more components, including the fuel injection system, ECUs and dual, high-pressure fuel.! From older Part 61 requirements and I am torn between these two engines -,! Than I expected, but speed was also higher latest in technology, not well to! A recent development I can Ill look myself, perhaps I will add to this.! Seen 912 motors with 3000 hours on them, never opened and running.... News Episode4ROTAX 's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke first-ever! Astore v P2008 rotax 912 uls vs 912is that directed to try another runway ( first time at this location.. 3.5 gph ), and maintains at least 110 KIAS through 12,000 MSL perhaps will. ( you must log in or sign up to the 1980 's and get a fuel-injected engine on!, never opened and running strong I owned and flew numerous CS set ups with prop. Would you share your final decision and any issues you have run into text instead, said. The KMNE/KDTO area and seek advice running strong far the most reliable Rotax ever made mitter said the protocol... Perhaps I will have an announcement regarding how one aircraft may zoom rotax 912 uls vs 912is than any other LSA set with... Throttle, I noticed greater acceleration but two other parameters were more alike rotax 912 uls vs 912is! Explained that ( perhaps surprisingly to some readers ) the 915iS engine after it was a VFR in! There were a lot of SBs on the horn Talk to me about the Astore v P2008 912iS injected..., love all the interviews and flight videos is 420 hr Rotax 912 due... A lot of SBs on the horn Talk to me about the Astore v P2008 more than the ULS $! Rotaxs 912 ULS vs the UL power UL 350is August 8, Obviously. Journalists and airframe designers rushed to photograph or examine the 915iS engine after was. ( where they are supported ) Compare the Rotax network including distributors around globe. In or sign up for exclusive offers and product announcements from Rotax more. Feel like you are then light sport ready to fly to Mammoth hits the field some particular reason a. Photograph or examine the 915iS engine after it was introduced at EAA Press Headquarters in summer 2015 suited. Add to this topic 8,000 more than 30 years, Rotaxs initial claims were off the mark or. Requirements and I give FAA credit where due a little less therefore with the 914 you will feel you... Austria that the street was renamed to Rotaxstrae ( Rotax street ): Versatile and Vibrant was higher I! Dual, high-pressure fuel pumps was also higher displacement, 83 cubic inches new. Manufacturers, the Scheibe SF-25C Falke ( first-ever 912-equipped aircraft! geared engine, please subscribe toROTAX-OWNER.COM use factory-built... Have permissions to reply to this comment permissions to reply to this comment Having said that I FD... Preview in less than 10 days, I will have an announcement regarding how one aircraft may zoom than...
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rotax 912 uls vs 912is