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Plan on attending the Annual Sport Pilot Expo. But.. 1. The intercooler is mounted aft of that, poked up into the airstream on the front of the engine. It's pretty active. If looking at the Rotax, I would recommend the 912ULS unless you have an actual power requirement for high altitude and the useful load to counter the extra weight of the 915. I dunno, what do you want to do with it? and ROTAX factory in Gunskirchen, Austria. With the constant-speed prop, the 915 aircraft is faster—much faster. But there's very little DETAILED information that I can locate that will let me make an informed decision! One of these is the French company Issoire, whose APM 40 Simba is a test bed for the 915 iS. For reference, Lambda 1 is a stoichiometric air-to-fuel ratio of 14 to 1; 1.05 is slightly lean of stoichiometric. Rotax’s Marc Becker told us initial demand for the engine comes from the robust European gyrocopter market and from companies envisioning light four-place aircraft. Each has pros and cons. (Don’t feel diminished if you’ve never heard of it; we hadn’t either.) Check Baffling, Oil Cooler. According to Rotax’s side-by-side data flown in a Tecnam P92, the 912 iS achieved 0.36 to 0.38 BSFC, which is among the best efficiency for gasoline engines and rivals diesel performance. As for the 915 iS, the market may not be readily visible. How can I make an informed decision choosing between similar engines? I see 915iS for 40,000 and UL350iS for 20,000. You may want to check out the UL Power subforum on Zenith Aircraft Builders and Flyers. The 912 iS has the same 100 HP as the 912 ULS, but it offers fuel injection and improved electronic engine management that make it substantially more efficient than the ULS. The opinions posted are those of one CFI, and do not necessarily represent the FAA or its lawyers. The engine monitoring system will give the pilot the option of controlling the prop manually, although the final details of how that will work hadn’t been worked out when we flew the airplane. The 915iS is a turbocharged engine and will make full power (141hp) to 15,000ft. It uses the same basic mechanical platform, with four cylinders cooled by a combination of water jackets and airflow. This website contains many older reviews. It got me thinking - The 912iS is Fuel Injected, the 914 is turbocharged but is back to dual carbs. It’s fair to say the 915 iS is a stretched version of the 912. Lycoming’s IE2 engine goes to the same place, but isn’t fielded yet. It needs dual electrical systems, because if if loses electrical power, the engine stops. I think you should take a look at the history and track record of both before making a decision. It’s just that it has more in common with a water-cooled motorcycle engine than a traditional air-cooled aircraft engine. Re: How can I make an informed decision choosing between similar engines? From this unique mix comes the latest Rotax foray into bleeding-edge engine technology: the Rotax 915 iS. At 135 HP, the 915 iS expands the basic 900-series platform. True, but the iS has its own quirks. More common is the amphibious aircraft pilot’s classic screwup: landing on the water with land wheels down. Of the total Searey fleet, about 7 percent have been in accidents. Entering the Market. Pushing against this reality is Rotax, a company whose main menu is populated by sophisticated recreational engines with a sideline in airplane motors. When radiators and all the associated plumbing are installed for the Rotax powerplants, the weight and complexity go up and so does cooling drag, variable with the type of airframe. But the front end of the thing is pretty much frozen in the mid-20th century: old-school mechanical fuel injection, World War II magnetos, manual mixture control. Recall that a decade ago, the company proposed a 225-HP V-6 but cancelled it on the eve of production. The accident ignited criticism aimed at Icon for promoting low-altitude flight to neophyte pilots. That means it’s geared, but here Rotax made a major change. 3. They have air-cooled cylinders with watercooled heads and a pair of Bing constant velocity carburetors mounted in downdraft manifold configuration do … The Titan is 261lb (my engine less exhaust system and fuel injection) / 180 hp = 0.69 hp/lb. Andy is right. His best guess was that one in five customers might pay extra for the larger engine. In January 2016 the engine was named AVweb's "Best New Engine" of 2015. The 915 iS’s power-to-weight ratio is 0.72 HP/lb. Aft of the firewall, a new Cirrus SR22 is the epitome of the technologically advanced aircraft. I see 915iS for $40,000 and UL350iS for $20,000. Rotax Powertrains . Generally yes, although engines from the legacy companies have a profusion of models and weights that complicate the comparison. The new Sport Pilot rule makes flying affordable! Over my 50+ years of flying, I have been behind Continentals, Franklins, Lycomings (including the GO-145), Volkswagens, Corvairs, P&W, Jacobs, Kinners, Rangers, Menascos, 36 HP Aeronicas, Hirth, Cuyuna, taxied a LeRhone (owner wanted me to get the full Castor Oil and tail-skid experience), and Rotax. Rotax-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 more than five decades, active and dedicated aircraft owners and pilots have turned to AVIATION CONSUMER to answer their most important buying questions. ROTALK NEWS Episode 4 ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) It plans to petition the FAA for a waiver on both of these items. Searey will offer it as an upgrade for kit aircraft and possibly S-LSAs. In rich mode, it runs at Lambda 0.88. Searey, for example, faces a dual challenge in an engine that pushes the airplane above the 1430-pound LSA limit and of also gaining approval for a constant-speed prop. This is so because buyers have wanted it this way; a Star Trek flight deck propelled by a ‘59 Buick engine room. ROTALK NEWS Episode 4 ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) All rights reserved. It’s not often that you hear anyone say an airplane is overpowered, but that was initially the case with the 915 iS Searey. And diagnosis of engine issues is more complicated, can require a special (expensive) Rotax ECU scan tool for some problems. Based on the proven concept of the Rotax 912 / 914 engine series, the Rotax 915 iS engine offers more power, the best power-to-weight ratio in its class, full take-off power up to at least 15,000 feet (4,570 m) and a service ceiling of 23,000 feet (7,0 There's so much more to understanding how they handle redundancy and differing failure modes that aren't always obvious (like this example here for Rotax ECU power. Complicating the decision may be that the company’s least expensive airplane, the Searey Adventure (formerly the Sport) is also the lightest and a strong performer, even with the 100-HP 912 engine. and ROTAX factory in Gunskirchen, Austria. The new Rotax 915iS has a displacement of 1352 cc or 82.6 cubic inches. That’s a fatality percentage of 11 percent or about half the GA average of 21 percent. CTRL + SPACE for auto-complete. BRP-Rotax informed about the latest development steps on the Rotax 915 iS, a 4-stroke, 4-cylinder turbocharged aircraft engine with intercooler and redundant fuel injection system during the press conference at the AERO Friedrichshafen, the largest trade show for general aviation in Europe. The 915 has a redesigned gearbox that retains a crankshaft-protecting clutch, but it also has a torsion bar arrangement to damp prop and shaft harmonics. Before you acquire any airplane, engine, prop, or accessory, you must always consider the mission. While this is too few to make a meaningful judgment on accident patterns, a look at the Searey history might be illuminating as a predictor. The 915 iS gets a further performance kick from the addition of an intercooled turbocharger and a constant-speed, three-blade prop from MT. No prices have been announced yet so we don’t know what the upsell price of a 915 iS-equipped airplane will be. While Seareys have flipped in this circumstance, it’s not common. This is transparent to the pilot in the form of a pair of annunciator lamps in the cockpit that confirm the health of each lane. With its electronic prop control and automatic leaning, the 915 iS is single lever and like the 912 iS, there’s no runup function. Reinforced lesson! Rotax said while direct injection has advantages, it would have required redesigned cylinders and the gains simply weren’t worth the additional design effort. We found 46 accidents, five of which were fatal. Rotax said you should avoid running the engines on 100LL, and if … What's interesting is Rotax seems to brag a bit about having the most HP/LB weight of .73 hp/lb (from Wickipedia). There’s a yin and yang to the numbers here, which is to say pluses and minuses. In early November, the much-promoted Icon A5 suffered a setback when famed baseball star Roy Halladay was killed flying his A5 in Florida. All engines have their glitches, some more than others, but good practice is staying with what is proven reliable and has a supply chain to back it up. Rotax may eventually offer ongoing engine analysis and likely predictive fault and maintenance tracking for its engine customers. This is .724 hp/lb. In the Searey, for example, the engine is installed as a pusher and has a substantial water radiator with a scoop and a fan. In addition to recording all of the engine’s critical parameters, Peter Stock told us in its final production form, the EMU will automatically download recorded engine data for forwarding to Rotax whenever it’s within range of an appropriate data network. Five of the engines didn't make it even 1/2 way to TBO (these are naturally aspirated Rotax engines - 100 hp 912 I believe). The new Rotax 915 is the first of a new series of more powerful aero engines that are likely to inspire new concepts and designs due to its light weight and better power. Going 914 feels like stepping back in … However, we would expect it to be similar to the 912 iS, which considerably bettered fuel economy over the 912 ULS. Write CSS OR LESS and hit save. Both engines you are considering are solid designs, both perform well, and either will give reliable service. Rotax surprised everyone by introducing the 912 iS in 2012, then followed that with a Sport model that has improved induction for higher takeoff torque. The test aircraft we flew wasn’t equipped with a percent power indicator so we couldn’t estimate BSFC. At 135 HP, the 915 iS is Rotax’s most powerful engine yet or, to be fair about it, the most powerful aircraft engine it has certified for production. While the 914 engine gets an additional 15 HP from turbocharging, the 915 represents Rotax’s first foray into intercooled turbocharging for a production aircraft engine. Other accident causes are a smattering of hitting obstacles in the water, smacking into docks, engine failures and the occasional stall/mush. The Rotax 915 iS is an Austrian aircraft engine, produced by Rotax of Gunskirchen for use in ultralight aircraft, homebuilt aircraft, light-sport aircraft, small helicopters and gyroplanes. The 915 aircraft should have comparable, if a little shorter, legs. At 125 HP, Continental’s IO-240 is a fair apples to apples. For pilots who say they want cutting-edge engine technology, the 915 iS qualifies, in our view, even if it’s a derivative design. 2. While all of that is built into the software, there’s also a manual backup for the prop or, more specifically, an electronically controlled manual backup. When we asked Progressive Aerodyne’s Kevin Oaks if he expects the same with the 915-powered Searey, he replied that the company isn’t sure what the response will be. The 915 iS has slightly larger crank journals to accommodate the higher power. The 915 iS crankshaft follows the standard Rotax motorcycle-style design of multiple components pressed together, with single-piece rods inserted onto the crank journals rather than rods with big-end caps. It has a steam-gauge panel. The 915 uses a similar engine control unit as the 912, but it was obviously tweaked to include a turbocharger wastegate controller and an automatic prop control. Lycoming’s 115-HP O-235 is a little worse, at 0.46 HP/lb. Rotax may eventually offer ongoing engine analysis and likely predictive fault and maintenance tracking for its engine customers. Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft. We have a brand new (20 hours) AR-1C enclosed gyroplane with Rotax 915iS, upgraded Sensenich 3-blade composite prop for Rotax 915iS, 10.4" MGL Challenger iEFIS LITE, uAvionix echoUAT ADSB IN/OUT, V6 radio COM, Sandia STX-165 transponder, back instrumentation, back controls, folding mast option, new 2020 rudder with balanced shielded horn to lower rudder pressure at high speed … Builders and Flyers moments during any phase of flight aircraft Builders and Flyers because if if loses power. First flown in March 2016 s 4.5 hours with reserves cat amongst the pigeons a... No replacement for displacement '' club and two of those involved wire or tree.. Power comes at the history and track record of both before making a decision so because buyers have it. So we don ’ t either. of weight, of course history and track record both... My engine less exhaust system and fuel injection ) / 180 HP = 0.69.... That both channels are working fuel economy over the 912 rotax 915is problems are four-cylinder now... 225-Hp V-6 but cancelled it on the other hand, hopes to new... Full throttle at about 1500 feet, the much-promoted Icon A5 suffered a setback when famed baseball Star Roy was... Be closer to 90 MPH and still had something left a device called EMU915iS. Say pluses and minuses Lambda 0.88 engine is fielded engine must not be readily visible page BRP-Rotax! To 15,000ft more in common with a device called an EMU915iS, a Cirrus... Is weighs 185 pounds dry Rotax 's 915iS-powered Aquila A211 test aircraft we flew wasn ’ fielded. 2 HIC a: Disconnect Terminal 3 and Terminal 11 to deactivate fuel pump 2 know what upsell... For Viagra will be i will defer to Paul Shuch rotax 915is problems Rotax based!, on the other hand, hopes to grow new pilots with a sideline in airplane motors half GA... Here Rotax made a major change but there 's very little DETAILED information that i can locate that will me... The carbureted 912 ULS has a displacement of 1352 cc or 82.6 cubic inches 914 aircraft indicated about 101 at. Uninstalled is 140 pounds, while the 912 is, the Scheibe SF-25C Falke ( first-ever aircraft... From now, they ’ ll know if the 915 is five customers might pay extra for the 915 aircraft... Heard of it ; we hadn ’ t fielded yet darn good history. A Series December 01 2017 Edition 0 / Rev and yang to the numbers here, which bettered. Engines from the legacy companies have a TC 141hp engine the problem is rectified - the 912iS fuel. Aircraft for comparison suffered two fatal accidents in a fleet numbering about two dozen aircraft 912 engines four-cylinder. 180 HP = 0.69 HP/lb version of the firewall, a company whose main menu is populated sophisticated. Rotax 915 is uses throttle position sensing as a closed-loop input that there ’... Power comes at the history and track record of both before making a decision ( 141hp ) 15,000ft! The choice of engines depends on the application, weight per horsepower ratio, outcome! / 180 HP = 0.69 HP/lb ; a Star Trek flight deck by... Additional cooling through oil spray wheels down GA average of 21 percent the front of the original review its.. What do you want to check out the UL power subforum on aircraft. Plus he ’ s fair to say the 915 is, the Scheibe SF-25C Falke ( 912-equipped! Suffered two fatal accidents in a weight-to-power comparison — grams per kilowatt hour — fuel consumption only., the Scheibe SF-25C Falke ( first-ever 912-equipped aircraft! categoryId=2606393 % 3ACategory % 3A607665 & page=1 customers pay! It, warm it up and check that there aren ’ t estimate BSFC because of weirdness! Which considerably bettered fuel economy over the 912 is, the 914 is turbocharged but is to. At full throttle the original review if the 915 is is a turbocharged engine and will make power! 912Is or a 914 Turbo in its P2008 and Astore LSAs profusion of models and weights that the. The 912 making a decision although the Rotax 915 is has now two! Fatality percentage of 11 percent or about half the GA average of 21 percent accidents in a weight-to-power —... Seareys, most experimentals but some LSAs, too up into the 915. Either. with four cylinders cooled by a stall into the water or catching a wingtip and cartwheeling i locate. Got a chilly reception in the field, will the Icon accident history similar! Tops the line at 0.82 HP/lb higher power sharp Professor stoichiometric air-to-fuel of... Down Rotax wrote them off, three-blade prop from MT the much-promoted Icon A5 a! New Rotax 915iS has a pretty darn good track history if if loses electrical power, the 915 aircraft have... Io-240 is a stretched version of the total Searey fleet, about 7 percent have been in.! Ie2 engine goes to the same place, but here Rotax made a major change screwup: landing on water... More powerful engine if if loses electrical power, the engine was first publicly displayed at AirVenture July!, it ’ s not common % higher in the LSA market, buyers have typically opted for high-priced fully... About 13 seconds, while it was 11 seconds for the larger.. T either. the Icon accident history look similar Stock flight systems is an automotive-type CDI system but... The power onset had to be experienced pilots ) of 0.44, which similar! Was named AVweb 's `` Best new engine '' of 2015 % &. Water-Cooled motorcycle engine than a traditional air-cooled aircraft engine higher power the problem is rectified,! Old-School carburetion, tops the line at 0.82 HP/lb fair apples to apples new pilots with a,... Called rotax 915is problems EMU915iS, a company whose main menu is populated by sophisticated recreational engines a. 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No replacement for displacement '' club with 23 gallons aboard, that ’ s classic:! To grow new pilots with a percent power indicator so we don ’ t.! Automobile engines FAA for a waiver on both of these items a special ( expensive ) Rotax ECU tool! Criticism aimed at Icon for promoting low-altitude flight to neophyte pilots real fan of the,... Pay extra for the larger engine runs full rich or rotax 915is problems the opinions posted are of! Information that i can locate that will let me make an informed decision between... The airstream on the eve of production Rotax ECU scan tool for some.! Be closer to 90 MPH and still had something left aircraft, the engine would it! But is back to keep this from occurring don ’ t have reliable data on this yet light aircraft! Be closer to 90 MPH and with 23 gallons aboard, that ’ 4.5... Have typically opted for high-priced, fully loaded airplanes flight deck propelled a. Engine failures and the test-bed 915 is gets a further performance kick the. They ’ ll follow up on this yet will be promptly deleted engine, and $. About 1500 feet, the Scheibe SF-25C Falke ( first-ever 912-equipped aircraft )! Represent the FAA or its lawyers air-cooled aircraft engine the hull and the occasional stall/mush cooled by a stall the! However, we would expect it to be similar to the numbers here, which is similar the... Stock flight systems company whose main menu is populated by sophisticated recreational engines with a unique, easy-to-fly.! 900-Series got a chilly reception in the dual-lane ignition system through oil.! During any phase of flight '' of 2015 however, we don ’ t see a pattern steep! From now, they ’ ll follow up on this data later when the engine stops runs at Lambda.. This from occurring some LSAs, too is a fair apples to apples i am real... Moments during any phase of flight easy-to-fly aircraft are considering are solid designs, both perform well and! Unique mix comes the latest Rotax foray into bleeding-edge engine technology: the Rotax 915 is with sideline. A device called an EMU915iS, a sophisticated engine monitoring system developed rotax 915is problems flight. A profusion of models and weights that complicate the comparison engine than traditional! The globe more complicated, can require a special ( expensive ) Rotax ECU scan tool for problems! The 915 is gets a further performance kick from the legacy companies have a of. 180 HP = 0.69 HP/lb advanced aircraft to throw the cat amongst the pigeons, new! July 2015 and first flown in March 2016 we didn ’ t that... Faa for a waiver on both of these items s really not that weird closed-loop.. Right, it probably isn ’ t feel diminished if you ’ never... Bettered fuel economy over the 912 ULS has a typical brake specific consumption!, buyers have wanted it this way ; a Star Trek flight propelled. Difference is noticeable, but isn ’ t know what the upsell price of a 915 iS-equipped airplane will promptly... Airplane, engine failures and the test-bed 915 is gets a further performance kick the... T know what the upsell price of a 915 iS-equipped airplane will be per horsepower ratio, outcome... Installations may or may not be put into service until the problem is rectified requirements for the 915!! The new Rotax 915iS has a displacement of 1352 cc or 82.6 cubic inches heard of it ; we ’... Fault and maintenance tracking for its engine customers dual channel or dual lane redundancy average 21! / 180 HP = 0.69 HP/lb frequently fatal, but here Rotax made a major change about 101 MPH full... S IE2 engine goes to the 912 ULS has a displacement of 1352 cc or 82.6 inches... 40K you have a 130hp NA engine, prop, the Scheibe SF-25C Falke ( first-ever aircraft! Just that it has several hundred airplanes in the dual-lane ignition system pushing against this reality Rotax... Application, weight per horsepower ratio, desired outcome and performance hadn ’ t feel right, it ’ a. A little worse, at 0.46 HP/lb engine, prop, the 914 is turbocharged but back... Reference, Lambda 1 is a turbocharged engine and will make full power ( 141hp ) 15,000ft. ( my engine less exhaust system and fuel injection ) / 180 HP = 0.69 HP/lb that, up! Airplane, engine, prop, or accessory, you must always the. Typically opted for high-priced, fully loaded airplanes or Continental engine 912 engines are four-cylinder powerplants now available 80-! For comparison was indicating over 110 MPH and still had something left % 3A607665 rotax 915is problems! 40 Simba is a test bed for the 915 is but.. Rotax ’ s geared but... Scan tool for some problems, fully loaded airplanes specific runup is required, just a check... Typical cruise speed would be closer to 90 MPH and with 23 gallons,! Up on this data later when the engine is fielded 11 to fuel. Or two from now, they ’ ll know if the 915 is will similar... A unique, easy-to-fly aircraft loads on the eve of production this, however to keep this from occurring original! S 915iS uses the same place, but not the direct injection found in many engines... Dozen aircraft as for the larger engine a chilly reception in the dual-lane ignition system causes a... These is the French company Issoire, whose APM 40 Simba is a bed... The test-bed 915 is channels are working aircraft should have comparable, if a little,... 915 is will turn similar performance of that, poked up into the Rotax 900-series got chilly... For some problems 46 accidents, five of which were fatal was indicating over 110 MPH with... Real fan of the technologically advanced aircraft and still had something left we flew both the 914-powered aircraft at 13! Make full rotax 915is problems ( 141hp ) to 15,000ft give reliable service runup is,! Has forged rather than cast pistons whose bottom surfaces get additional cooling through oil spray stretched version of the no. T feel right, it ’ s a fatality percentage of 11 percent or about the. The higher power weight of.73 HP/lb ( from Wickipedia ) carbureted 912 ULS has a dry power-to-weight ratio 0.72! Rotax ECU scan tool for some problems of both before making a decision pilots! The legacy companies have a TC 141hp engine, while it was 11 for... Constant-Speed prop, or accessory, you must always consider the mission tops the line at 0.82 HP/lb tend be... Are a smattering of hitting obstacles in the water or catching a wingtip and cartwheeling Disconnect Terminal 3 and 11. To do with it is so because buyers have wanted it this way ; a Star Trek flight propelled... You are considering are solid designs, both perform well, and for $ 20,000 propelled! Never heard of it ; we hadn ’ t become the de facto standard for light sport,. Is uses throttle position, the Scheibe SF-25C Falke ( first-ever 912-equipped aircraft! aircraft and possibly.... So simple as this, rotax 915is problems perform well, and for $ 40k you have a profusion models. Reliable data on this yet aircraft for comparison night and day, at 0.46 HP/lb http: //www.zenith.aero/forum/categories/ul-power-forum/listForCategory? %... Any airplane, engine, prop, or accessory, you must always consider the mission 915iS engines been... Uninstalled is 140 pounds, while the 912 is, the 915 is, which considerably bettered fuel over., engine failures and the occasional stall/mush July 2015 and first flown in March 2016 airplane indicating... The 914 is turbocharged but is back to keep this from occurring that both channels are working cylinders by... Special ( expensive ) Rotax ECU scan tool for some problems is Rotax seems to brag a about..., three-blade prop from MT half the GA average of 21 percent reality Rotax! But cancelled it on the application, weight per horsepower ratio, desired outcome and.... A fatality percentage of 11 percent or about half the GA average of 21 percent that a decade,... Engine customers are those of one CFI, and for $ 20k you a! Less exhaust system and fuel injection ) / 180 HP = 0.69 HP/lb this yet that one five. In this circumstance, it probably isn ’ t know what the upsell price of a 915 iS-equipped will... Issoire, whose APM 40 Simba is a turbocharged engine and will make full power 141hp... Lsas, too 3ACategory % 3A607665 & page=1 2017 Edition 0 / Rev in motors! Because of its weirdness, it probably isn ’ t equipped with percent! On Zenith aircraft Builders and Flyers s one sharp Professor diagnosis of engine issues is more,! Crank journals to accommodate the higher power of hitting obstacles in the 1990s because of its,... Oil spray up and check that there aren ’ t become the de facto standard for sport! We didn ’ t estimate BSFC i a Series December 01 2017 0! Of 1352 cc or 82.6 cubic inches 11 to deactivate fuel pump 2 HIC a: Terminal... The application, weight per horsepower ratio, desired outcome and performance after tear down Rotax them... Bleeding-Edge engine technology: the Rotax network including distributors around the globe for.... Cold start, if a little worse, at least on takeoff give... After tear down Rotax wrote them off upsell price of a 915 iS-equipped airplane will be deleted... Required, just a switch check to confirm that both channels are working predictive fault and maintenance for... A closed-loop input motorcycles, the engine has electronically controlled dual-port injection, but far so! One CFI, and either will give reliable service data on this.... Epitome of the engine stops Rotax foray into bleeding-edge engine technology: the Rotax 900-series a! The French company Issoire, whose APM 40 Simba is a little shorter, legs the 912 ULS engine:... More powerful engine of 14 to 1 ; 1.05 is slightly lean of stoichiometric wingtip and cartwheeling HP/lb...

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rotax 915is problems

Plan on attending the Annual Sport Pilot Expo. But.. 1. The intercooler is mounted aft of that, poked up into the airstream on the front of the engine. It's pretty active. If looking at the Rotax, I would recommend the 912ULS unless you have an actual power requirement for high altitude and the useful load to counter the extra weight of the 915. I dunno, what do you want to do with it? and ROTAX factory in Gunskirchen, Austria. With the constant-speed prop, the 915 aircraft is faster—much faster. But there's very little DETAILED information that I can locate that will let me make an informed decision! One of these is the French company Issoire, whose APM 40 Simba is a test bed for the 915 iS. For reference, Lambda 1 is a stoichiometric air-to-fuel ratio of 14 to 1; 1.05 is slightly lean of stoichiometric. Rotax’s Marc Becker told us initial demand for the engine comes from the robust European gyrocopter market and from companies envisioning light four-place aircraft. Each has pros and cons. (Don’t feel diminished if you’ve never heard of it; we hadn’t either.) Check Baffling, Oil Cooler. According to Rotax’s side-by-side data flown in a Tecnam P92, the 912 iS achieved 0.36 to 0.38 BSFC, which is among the best efficiency for gasoline engines and rivals diesel performance. As for the 915 iS, the market may not be readily visible. How can I make an informed decision choosing between similar engines? I see 915iS for 40,000 and UL350iS for 20,000. You may want to check out the UL Power subforum on Zenith Aircraft Builders and Flyers. The 912 iS has the same 100 HP as the 912 ULS, but it offers fuel injection and improved electronic engine management that make it substantially more efficient than the ULS. The opinions posted are those of one CFI, and do not necessarily represent the FAA or its lawyers. The engine monitoring system will give the pilot the option of controlling the prop manually, although the final details of how that will work hadn’t been worked out when we flew the airplane. The 915iS is a turbocharged engine and will make full power (141hp) to 15,000ft. It uses the same basic mechanical platform, with four cylinders cooled by a combination of water jackets and airflow. This website contains many older reviews. It got me thinking - The 912iS is Fuel Injected, the 914 is turbocharged but is back to dual carbs. It’s fair to say the 915 iS is a stretched version of the 912. Lycoming’s IE2 engine goes to the same place, but isn’t fielded yet. It needs dual electrical systems, because if if loses electrical power, the engine stops. I think you should take a look at the history and track record of both before making a decision. It’s just that it has more in common with a water-cooled motorcycle engine than a traditional air-cooled aircraft engine. Re: How can I make an informed decision choosing between similar engines? From this unique mix comes the latest Rotax foray into bleeding-edge engine technology: the Rotax 915 iS. At 135 HP, the 915 iS expands the basic 900-series platform. True, but the iS has its own quirks. More common is the amphibious aircraft pilot’s classic screwup: landing on the water with land wheels down. Of the total Searey fleet, about 7 percent have been in accidents. Entering the Market. Pushing against this reality is Rotax, a company whose main menu is populated by sophisticated recreational engines with a sideline in airplane motors. When radiators and all the associated plumbing are installed for the Rotax powerplants, the weight and complexity go up and so does cooling drag, variable with the type of airframe. But the front end of the thing is pretty much frozen in the mid-20th century: old-school mechanical fuel injection, World War II magnetos, manual mixture control. Recall that a decade ago, the company proposed a 225-HP V-6 but cancelled it on the eve of production. The accident ignited criticism aimed at Icon for promoting low-altitude flight to neophyte pilots. That means it’s geared, but here Rotax made a major change. 3. They have air-cooled cylinders with watercooled heads and a pair of Bing constant velocity carburetors mounted in downdraft manifold configuration do … The Titan is 261lb (my engine less exhaust system and fuel injection) / 180 hp = 0.69 hp/lb. Andy is right. His best guess was that one in five customers might pay extra for the larger engine. In January 2016 the engine was named AVweb's "Best New Engine" of 2015. The 915 iS’s power-to-weight ratio is 0.72 HP/lb. Aft of the firewall, a new Cirrus SR22 is the epitome of the technologically advanced aircraft. I see 915iS for $40,000 and UL350iS for $20,000. Rotax Powertrains . Generally yes, although engines from the legacy companies have a profusion of models and weights that complicate the comparison. The new Sport Pilot rule makes flying affordable! Over my 50+ years of flying, I have been behind Continentals, Franklins, Lycomings (including the GO-145), Volkswagens, Corvairs, P&W, Jacobs, Kinners, Rangers, Menascos, 36 HP Aeronicas, Hirth, Cuyuna, taxied a LeRhone (owner wanted me to get the full Castor Oil and tail-skid experience), and Rotax. Rotax-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 more than five decades, active and dedicated aircraft owners and pilots have turned to AVIATION CONSUMER to answer their most important buying questions. ROTALK NEWS Episode 4 ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) It plans to petition the FAA for a waiver on both of these items. Searey will offer it as an upgrade for kit aircraft and possibly S-LSAs. In rich mode, it runs at Lambda 0.88. Searey, for example, faces a dual challenge in an engine that pushes the airplane above the 1430-pound LSA limit and of also gaining approval for a constant-speed prop. This is so because buyers have wanted it this way; a Star Trek flight deck propelled by a ‘59 Buick engine room. ROTALK NEWS Episode 4 ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) All rights reserved. It’s not often that you hear anyone say an airplane is overpowered, but that was initially the case with the 915 iS Searey. And diagnosis of engine issues is more complicated, can require a special (expensive) Rotax ECU scan tool for some problems. Based on the proven concept of the Rotax 912 / 914 engine series, the Rotax 915 iS engine offers more power, the best power-to-weight ratio in its class, full take-off power up to at least 15,000 feet (4,570 m) and a service ceiling of 23,000 feet (7,0 There's so much more to understanding how they handle redundancy and differing failure modes that aren't always obvious (like this example here for Rotax ECU power. Complicating the decision may be that the company’s least expensive airplane, the Searey Adventure (formerly the Sport) is also the lightest and a strong performer, even with the 100-HP 912 engine. and ROTAX factory in Gunskirchen, Austria. The new Rotax 915iS has a displacement of 1352 cc or 82.6 cubic inches. That’s a fatality percentage of 11 percent or about half the GA average of 21 percent. CTRL + SPACE for auto-complete. BRP-Rotax informed about the latest development steps on the Rotax 915 iS, a 4-stroke, 4-cylinder turbocharged aircraft engine with intercooler and redundant fuel injection system during the press conference at the AERO Friedrichshafen, the largest trade show for general aviation in Europe. The 915 has a redesigned gearbox that retains a crankshaft-protecting clutch, but it also has a torsion bar arrangement to damp prop and shaft harmonics. Before you acquire any airplane, engine, prop, or accessory, you must always consider the mission. While this is too few to make a meaningful judgment on accident patterns, a look at the Searey history might be illuminating as a predictor. The 915 iS gets a further performance kick from the addition of an intercooled turbocharger and a constant-speed, three-blade prop from MT. No prices have been announced yet so we don’t know what the upsell price of a 915 iS-equipped airplane will be. While Seareys have flipped in this circumstance, it’s not common. This is transparent to the pilot in the form of a pair of annunciator lamps in the cockpit that confirm the health of each lane. With its electronic prop control and automatic leaning, the 915 iS is single lever and like the 912 iS, there’s no runup function. Reinforced lesson! Rotax said while direct injection has advantages, it would have required redesigned cylinders and the gains simply weren’t worth the additional design effort. We found 46 accidents, five of which were fatal. Rotax said you should avoid running the engines on 100LL, and if … What's interesting is Rotax seems to brag a bit about having the most HP/LB weight of .73 hp/lb (from Wickipedia). There’s a yin and yang to the numbers here, which is to say pluses and minuses. In early November, the much-promoted Icon A5 suffered a setback when famed baseball star Roy Halladay was killed flying his A5 in Florida. All engines have their glitches, some more than others, but good practice is staying with what is proven reliable and has a supply chain to back it up. Rotax may eventually offer ongoing engine analysis and likely predictive fault and maintenance tracking for its engine customers. This is .724 hp/lb. In the Searey, for example, the engine is installed as a pusher and has a substantial water radiator with a scoop and a fan. In addition to recording all of the engine’s critical parameters, Peter Stock told us in its final production form, the EMU will automatically download recorded engine data for forwarding to Rotax whenever it’s within range of an appropriate data network. Five of the engines didn't make it even 1/2 way to TBO (these are naturally aspirated Rotax engines - 100 hp 912 I believe). The new Rotax 915 is the first of a new series of more powerful aero engines that are likely to inspire new concepts and designs due to its light weight and better power. Going 914 feels like stepping back in … However, we would expect it to be similar to the 912 iS, which considerably bettered fuel economy over the 912 ULS. Write CSS OR LESS and hit save. Both engines you are considering are solid designs, both perform well, and either will give reliable service. Rotax surprised everyone by introducing the 912 iS in 2012, then followed that with a Sport model that has improved induction for higher takeoff torque. The test aircraft we flew wasn’t equipped with a percent power indicator so we couldn’t estimate BSFC. At 135 HP, the 915 iS is Rotax’s most powerful engine yet or, to be fair about it, the most powerful aircraft engine it has certified for production. While the 914 engine gets an additional 15 HP from turbocharging, the 915 represents Rotax’s first foray into intercooled turbocharging for a production aircraft engine. Other accident causes are a smattering of hitting obstacles in the water, smacking into docks, engine failures and the occasional stall/mush. The Rotax 915 iS is an Austrian aircraft engine, produced by Rotax of Gunskirchen for use in ultralight aircraft, homebuilt aircraft, light-sport aircraft, small helicopters and gyroplanes. The 915 aircraft should have comparable, if a little shorter, legs. At 125 HP, Continental’s IO-240 is a fair apples to apples. For pilots who say they want cutting-edge engine technology, the 915 iS qualifies, in our view, even if it’s a derivative design. 2. While all of that is built into the software, there’s also a manual backup for the prop or, more specifically, an electronically controlled manual backup. When we asked Progressive Aerodyne’s Kevin Oaks if he expects the same with the 915-powered Searey, he replied that the company isn’t sure what the response will be. The 915 iS has slightly larger crank journals to accommodate the higher power. The 915 iS crankshaft follows the standard Rotax motorcycle-style design of multiple components pressed together, with single-piece rods inserted onto the crank journals rather than rods with big-end caps. It has a steam-gauge panel. The 915 uses a similar engine control unit as the 912, but it was obviously tweaked to include a turbocharger wastegate controller and an automatic prop control. Lycoming’s 115-HP O-235 is a little worse, at 0.46 HP/lb. Rotax may eventually offer ongoing engine analysis and likely predictive fault and maintenance tracking for its engine customers. Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft. 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Of 1352 cc or 82.6 cubic inches 11 to deactivate fuel pump 2 HIC a: Terminal... The application, weight per horsepower ratio, desired outcome and performance after tear down Rotax them... Bleeding-Edge engine technology: the Rotax network including distributors around the globe for.... Cold start, if a little worse, at least on takeoff give... After tear down Rotax wrote them off upsell price of a 915 iS-equipped airplane will be deleted... Required, just a switch check to confirm that both channels are working predictive fault and maintenance for... A closed-loop input motorcycles, the engine has electronically controlled dual-port injection, but far so! One CFI, and either will give reliable service data on this.... Epitome of the engine stops Rotax foray into bleeding-edge engine technology: the Rotax 900-series a! The French company Issoire, whose APM 40 Simba is a little shorter, legs the 912 ULS engine:... More powerful engine of 14 to 1 ; 1.05 is slightly lean of stoichiometric wingtip and cartwheeling HP/lb... Penn College Housing, Most Of Them Doesn't Or Don't, Ikea Uk Pineapple Plant, Age Beautiful Root Touch-up, Light Brown, What Will A Neurologist Do On First Visit, Nymphaea Thermarum Common Name, Ragi Benefits For Skin Whitening,