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. Motor as the sport upgrade already done. 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. In power mode, it runs at about Lambda 0.8 or 0.9. I have constant speed prop time, a fair bit of it, but that was some years in my past. Although diesel engines demonstrate measurably better efficiency than gasoline engines, gasoline engines arent standing still, theyre improving, too. For decades I owned and flew numerous CS set ups with aseparate prop control and think I would prefer that. The 912S is certified, as are the A and F, which are used in the Diamond DA20, which is quite popular in Europe. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. Rotax has upgraded the engine for free with a stator kit to ensure there is enough power for full glass cockpits, a nice benefit. You do not have permissions to reply to this topic. 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..? At this setting the 914 is making a lot more horsepower that a 912. Carbs vs. Fuel Injection. by MrMorden Tue Feb 21, 2017 10:23 am, Post When Rotax surprised us last year with the rollout of its new 912 iS engine, we were skeptical of a claimed 20 percent improvement in fuel economy against the old standby 912 ULS. Why in Gods name do you insist on perpetuating the idea that pilots with a Light Sport or Recreational license are incapable and inferior to someone with a PPL? That being said, my next personal aircraft WILL have a 912 iS engine and I will buy the BUDS Level 2 service kit. Ive been flying a P2008 with the 912iS for over 3 1/2 years out of CA, in the mountains. Really sets you back in the seat compared to the 912. continuous power at 5500 1/miniS: ASTM compliant | iSc: certified according to EASA CS-E. My best friend has one in his Europa. Please, advertisements for Viagra will be promptly deleted!". It features liquid-cooled cylinder heads and air-cooled cylinders. 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. When I can Ill look myself, perhaps I will add to this comment. or simplicity? But even with the same amount of fuel the turbo engine is more efficient because the air flows inside the chamber without been aspirated. by drseti Sun Feb 26, 2017 9:30 pm, Post I have two Aircraft one with a ULS (100 hr) one with an IS 420 hr. 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. Although I loved the power of the 915iS with its shortened takeoff roll, thrilling climb to altitude, low-speed fuel economy, and quiet running, the 912iS ismore my kind of engine. 80mm, P.C.D. 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. I agree with Mark, the 912 iS was a bit smoother in my experience over the 912 ULS. I would still prefer fuel injection - when was the last time your car engine died ? 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. 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. It is also relatively easy for the inexperienced, and already busy new pilot to over speed a constant speed setup. This is based on actually owning and flying the plane, not here-say or charts. Perfected 4-stroke engine with full take-off power and engine management system. Though my shop is a Rotax independent repair centre, authorized to work on the iS, I choose not to, because of what I'd have to charge in order to amortize that expensive dongle. What make and model of turbocharger does Rotax use on the 914 and 915is engines? [I] am planning to add an Airmaster electric prop. For most recreational pilots its an unnecessary distraction in the cockpit. 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. This requires a novel preflight inspection procedure: before checking the oil level with the dipstick, the engine is "burped" by removing the oil filler cap and turning the propeller until a gurgling sound is heard, which indicates that all oil has been forced into the tank and the oil level can now be checked accurately. Hey thinking about a 915 on a superstol. 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. No carbs to mess with but has had a few ongoing gearbox and fuel control issues that may or may not be fully resolved. The engine is by far the most reliable Rotax ever made. With the 914 you will feel like you are then light sport ready to fly to Mammoth. Sign up Top Rotax-Owner.com I know there have been issues with the 912iS, but is it all done with? Which is your favorite (and why)? Originally equipped with carburetors, later versions are fuel injected. It is more than most sport pilots may prefer and more than some should manage perhaps. This page was last edited on 3 December 2022, at 14:57. Thank you so much. 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. Immediately the engine burst to life. Rotax 912 S/ULS. Hi Drew: Thanks for your kind words. occupation. because I thought you saved a lot of carburator work, hence 912iS being simpler.. but I'm no expert. Bashing the FAA while we are trying to work with them seems counterproductive to me. Thanks, George. To gain real-time experience, Rotax replaced a 912 ULS with the new 912 iS and flew it for 260 hours. Starting was as with any Rotax 9-series engine Ive ever flown. This decision can be reversed. If the latter is not familiar to you, dont worry about the detail for now but see an important point below*. For manufacturers, the issueis cost, the advertised price goes up about 20K for the injected engine. The iS has more components, including the fuel injection system, ECUs and dual, high-pressure fuel pumps. Stress is actually a little less therefore with the turbo engine, he said. - All Rights Reserved. You have allowed cookies to be placed on your computer. The Rotax 912 was first sold in 1989 in non-certificated form for use in ultralights and motorgliders. Joined: Feb 25, 2005 Messages: 10,820 Location: Is Rotax similar? Constant speed props are a breeze if your surroundings allows time to think. We leave passenger aircraft to other magazines or websites. engine management system. Acknowledged that and hit the throttle. However, syncing them won't fix the fact that they tend to run rich as hell no matter what you do. We are about 90 percent done and 90 percent to go. Belvoir Media Group, LLC. You have allowed cookies to be placed on your computer. I have been thinking ULS for great history, lower cost, lower weight, etc. Disadvantages? During our factory tour at Rotax, we politely told the engineers we would reserve judgment until the engine hits the field. ROTAX 912 UL 80 ENGINE $7,500 ACCEPTING OFFERS 2006 Rotax 912 UL 80 with with 545 hrs for sale Logbooks, . [I] had to build a shelf behind the firewall to accommodate the gizmos associated with the 915. hoping it will be good choice. Your concerns about pilot workload with a constant speed prop can be addressed by single lever control, an automated prop configuration. Change Cookie Consent Would end the argument. Flying Sting S4 ( N184WA ) out of Illinois. Price does not include shipping. [7], On 1 April 2014 the company announced its new 912 iS Sport upgrade with greater power and torque and reduced fuel consumption. 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. That requires the not cheap computer dongle (of which there are 4 levels) and the BUDS software. 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 document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. So perhaps the right answer is to add 2 more planes to my stable? In addition, Mitter collected broader data that showed that the 912 iS is slightly more efficient in climb than is the ULS. The 80hp (60kW) versions are sufficient to power the new generation of efficient motorgliders, such as the Pipistrel Sinus and the Urban Air Lambada. The 914 cruises at 35 inches manifold continuous. It is true that the 115 hp is available for five mins. 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. Yes, only Aerotrek can advise about the 915 availability. We are interested in development of sea plane with passenger capacity of 15 plus passenger with a turbine twin engines. No other modifications were done, according to Mitter, other than fuel plumbing. Please update your cookie preferences to see this video. Of carburator work, hence 912iS being simpler.. but I 'm no expert have cookies! Five mins the turbo engine is by far the most reliable Rotax ever made was last on... With Mark, the advertised price goes up about 20K for the inexperienced, and busy... Next personal aircraft will have a 912 Messages: 10,820 Location: is similar. Engine hits the field and 915is engines the field, but that was some years in my.. 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