The original 80 hp (60 kW) 912 UL engine has a capacity of 1,211 cc (73.9 cu in) and a compression ratio of 9.1:1. à 2000 heures pour les moteurs). If the ULS engine are installed with Open Loop Cooling, You will see slow warmups and owners taping over the radiators during cold weather in order to keep the engine from being Over-Cooled. Contrary to common belief, the thermostat is Not there to keep the engine Cool, it is there to keep the engine HOT! Must be due to the turbocharger and lower compression ratio. Forgive my ignorance, but if a 912 ULS or 914 UL engine loses electrical power, what happens to the functionality of these carbureted engines? Customer Service Information Report (CSIR), 912ULS runs rough and limited to 3400 RPM, Rotax 912ULS powered Kitfox V Pre-Buy Inspection, Rotax-powered Kitfox V Pre-Buy Inspection, SI-912 i-002_SI-915 i-002 B.U.D.S. 915 iS (Series) Turbocharger Heat Shield Inspection. Rotax 912 ULS DCDI 100CV* Moteur 4 temps développé exclusivement pour les aéronefs récréatifs. Conçu pour les grandes randonnées, très endurant, il est aussi apprécié par les professionnels et les Centres de formation. The hardest part is having to get so close to a spinning prop. I concur with Andy. I'm told over in the VAF RV-12 forum that the 912iS warms up to 122F Oil Temp much faster than the 912ULS. My 912is has both an Oil Thermostat and a Coolant Thermostat.It warms up quickly due to the fact that both coolant systems are essentially disabled by the thermostats until the temperature reaches 185°F. Forgive my ignorance, but if a 912 ULS or 914 UL engine loses electrical power, what happens to the functionality of these carbureted engines? Fuel burn for 912iS is 4 gph vs. 5gph for the ULS, on a cross-country that can easily mean an extra fuel stop. Remove Cookies Is that an option for you? ULS requires higher maintenance cost as well as higher fuel cost. ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. This decision can be reversed. Le Tanarg neo représente la quintessence de l’ULM Pendulaire. What do you get for your 50 pounds? Aircraft Installation Instructions, SI-912 i-004, SI-912-018, SI-914-020, SI-915 i-003 Purging of lubrication system, SI-PAC-016 and SI-912i-025 Optional Fuel Pump Assy, Intro to SI PAC 020 Fuel Pressure Damper Assy. I'm told over in the VAF RV-12 forum that the 912iS warms up to 122F Oil Temp much faster than the 912ULS. The O-200 is a reliable engine, but I haven't heard of issues with Rotax either. The Rotax 912 was first sold in 1989 in non-certificated form for use in ultralights and motorgliders. (Other than 50 pounds.). ROTALK NEWS Episode 3Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations. The 912ULS has a single stator with 2 poles that are used for the ignition. However the IS injection system runs the engine "leaner" an IS system has closer to correct fuel ratio all throughout the range. Prop speeds are substantially lower. Reconsider Cookies Here's some statistics from my personal database of homebuilt accidents (1998-2017): Has anyone done the research on the difference in insurance rates for equal aircraft with certified and non- certified engines ? Rotax engineers have set the engines to run in what they call Eco mode (until 97% power is demanded). ASB-915 i A-006, ASB-912 i-010 Inspection and/or replacement of fuel pump assy. The main downside is the scarcity of certified Rotax mechanics. Flying Sting S4 ( N184WA ) out of Illinois. For instance, changing oil and filter at recommended Rotax intervals and keeping vibrations to a minimum (carbs sync’t). Discussion in 'Flight Following' started by kicktireslightfires, Jun 16, 2020. 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. Bill Hertzel Rotax 912is North Ridgeville, OH, USABill.Hertzel@Yahoo.com Clicking the "Thank You" is Always Appreciated. I fly a 914 rotax turbo. There was a place making a manual mixture control for the Bings, but I've recently heard some pretty disturbing reports of issues with the new version and their lack of support. (You must log in or sign up to reply here. Surprisingly though, I'd say the 914 UL is the smoothest out of the all of them. _____ Eric Paslick EAA Chapter 732 Siloam Springs, AR Sonerai IIL N968KB Flying RV-12 #120991 History's slowest RV-12 build Empennage: In work N62EP Reserved 2019 Donation Made #2 01-17 … There was a crash of a Diamond Twinstar. SB-912-073/ SB-914-055 Replacement of Carburetor Circlip, ASB on Exchange of Exhaust Valves on ROTAX 915iA, 915iB and 914 (Series), SB-915 i A-004/SB-915 i B-004 Replacement of Oil Pump Housing. The main downside is the scarcity of certified Rotax mechanics. However the IS injection system runs the engine "leaner" an IS system has closer to correct fuel ratio all throughout the range. Also, you can take Rotax maintenance classes that will allow you to perform maintenance and inspections yourself. I believe it had been started but had a very weak battery. They all have different operators, different aircraft, different props, so I am of the opinion that it is not the operators. Leaner equels hotter. and ROTAX factory in Gunskirchen, Austria. Rotax-Owner.com is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax 582. Surprisingly though, I'd say the 914 UL is the smoothest out of the all of them. There is a guy at my field that tore down a 912 at TBO and said there was absolutely no need to overhaul it. I know guys who have let them sit for years and never have issues bringing them back to life. You just described an excellent way to make a 20 minute procedure into an all day project. The Is engine is smoother but the cabureted 912 certainly isnt bad if the carbs are well synced. Thank you for your quick responses. My 912is has both an Oil Thermostat and a Coolant Thermostat.It warms up quickly due to the fact that both coolant systems are essentially disabled by the thermostats until the temperature reaches 185°F. Of all the Rotax 100hp 912 uls in our area, non have made it to 1000 hrs, see the above example engines. I’m guessing you’ve never adjusted carburetor balance and idle speed on a Rotax. Présenté en Janvier 2019, le Tanarg neo bénéficie d’une longue expérience partagée avec les utilisateurs, associée au savoir-faire du 1er constructeur d’ULM pendulaire. Remove Cookies It could be an option. You can burn 91-93 octane auto gas (ethanol is NOT an issue with Rotax), it's lighter, quieter, smooth-running, and damn-near bullet-proof. SB-915 i A-005, SB-915 i B-005 Inspection of turbocharger assy. I used to synch the carbs on motorcycles myself and found it easy. In common use, you’ll only need “Power” mode in takeoff phase. ). ULS is cheaper to purchase but ends up costing more over the life of the engine. The ROTAX 912 engine is equipped with a dual ignition unit of a breakerless, capacitor discharge design, with an integrated generator. If the one for the engine fails it automatically switches to the other stator. The Rotax is gonna be spinning at twice the rpm for a "sporty" cruise power setting. ROTALK NEWS Episode 4ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) SB-912-073/ SB-914-055 Replacement of Carburetor Circlip, ASB on Exchange of Exhaust Valves on ROTAX 915iA, 915iB and 914 (Series), SB-915 i A-004/SB-915 i B-004 Replacement of Oil Pump Housing. The iS engine is very nice, but it's $3000 more than the ULS (current CPS pricing) and weights ~22lb more. You really don't notice that. The opinions posted are those of one CFI, and do not necessarily represent the FAA or its lawyers. I see you live in North Ridgeville, OH. 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. Proposé avec les motorisations Rotax 912 UL, 912 ULS et iS, il est doté d’un potentiel extraordinaire (T.B.O. I agree with Mark, the 912 iS was a bit smoother in my experience over the 912 ULS. Van's was asked this question and said it's very noticeable but they don't have an explanation for why it is true. By using our website, you agree that we can place these types of cookies on your device. Plan on attending the Annual Sport Pilot Expo. It's 3.5 gallons (45min) of fuel, or an extra overnight bag. 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. To receive critical-to-safety information on your ROTAX Engine, please subscribe toROTAX-OWNER.COM. The wear on the dogs is only on the drive side of the dog. I would still prefer fuel injection - when was the last time your car engine died ? I have a Rotax 912 ULS (S/N 5645095) that was new in 2005 and has been in an Alpi Pioneer 200 since new. Has anyone considered installing the Rotax 912 iS Sport instead of the 912 ULS? ASB-915 i A-006, ASB-912 i-010 Inspection and/or replacement of fuel pump assy. It's not terribly difficult or time consuming. We have recently found it has been hard to turn over and after finding the thread on here regarding this we slackened off the number 2 cyl studs and sure enough it freed up indicating a fretted crankcase. Be sure you are comparing Apples...The 912is installations may be more "Sophisticated.". Runs on 100LL or mogas, and it's light and powerful. Please, advertisements for Viagra will be promptly deleted!". Rotax-Owner.com is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax 582.