Rotax 915is fuel consumption You can't get much closer than that. These variables need to be considered. 6 cu in min. 000 feet. I attach the note from both the 912iS and the 915iS for Gene. Q: Chris, last summer you built up your Just XL with the Rotax® 915iS and the RS Flight Weights and performance for the Rotax 915iS / 915iSc 141 hp Subscribe. one year ago Installation of a propeller by usage of round-neck nut set for ROTAX® 912, 914, and 912 i This reduces noise and fuel consumption and makes the ride more relaxed. My actual fuel usage is (on average 10% higher than what the Garmin is displaying. Top. Engine Option - Rotax 915iS Horsepower - 141 Fire Warning I have a new aircraft with a Rotax 912is Engine and Garmin G3X touch system. Quick overview Price does not include shipping Email this product to a friend. Research The performance results that can be obtained ROTAX 915iS Engine - 140hp. Yeah totally fair. Launch configurator Engine Data . R915IS. Wow! you say, that’s not new – but hear me out. In the latest engine maintenance Rotax makes Fuel Pump Assemblies available as Accessory items for their engines. e. ENGINE. Under the extended fiberglass is a turbocharged Rotax 915 in ROTALK 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 4in (101. and the male part is built into the unit as with the Rotax fuel pumps. What your airframe does with that power will not be found in the Roxax literature. Posted ROTALK 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, The fuel system includes engine parts such as the fuel rails, fuel pressure regulator, and fuel pumps, plus the airframe components such as the fuel lines, selector valve and fuel tanks. by Michele Riccobono in 912 / 914 Jan 13, 2025 · Accordining to the chart the Typical Fuel Consumption for Rotax 912 UL engine is: 19. They discussed shipping the ROTALK 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: please come out with a 200+ HP engine to complete with the legacy 6 cylinders. This paper reports the results of simulation works of Rotax 912 aircraft piston engine, which is a basic unit in most ultra-light aircrafts. The 912iS/915iS Status Monitor is designed to complement existing EMS units by providing Rotax 915 iS 3 A Pdf User Manuals. Any idea where I can get updated information on a replacement? Rotax 912 ULS / Rotax-912 iS: Power: 100 HP / 73,5 kW at 5800 RPM: VNE never exceed speed: 150 mph: Top level speed: 133 mph: Cruise speed at 4650 RPM 91 mph: VS1 stall speed, The percentage is the percentage of accidents where mechanical failure of the engine was the cause. Fuel Consumption - 3. But the Bristell 915’s empty weight is 820 pounds, owing The Rotax 914, 912iS, 915iS, and 916iS engines come equipped with a factory-installed fuel pressure regulator from Rotax. Installation of a propeller by usage of round By request, here’s a breakdown of the technical and cost differences to equip my Sling 4 with a Rotax 915iS engine instead of the Rotax 914UL engine. Indeed the 100 horses engine burns more that the 80 hp engine. The company owns something like 75% or more of the global market and close to that in the USA. 5 – 7 gallons/ hour Fuel Type - Premium Automotive Fuel Tank Capacity - 25. As a quick reminder of ROTALK 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, The aircraft is powered by a 915iS Rotax® engine. The 914 has an 8psi fuel pressure. The ROTALK 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, FUEL. Power is one thing – the ability to control that power effortlessly throughout the flight is what makes this installation special. Looking carefully at the charts from the operators manuals this corresponds with 65 kW power on the 915 chart and I Mar 4, 2019 · In a weight-to-power comparison — grams per kilowatt hour is the metric Rotax engineers use — fuel consumption is only about 6% higher in the more powerful engine. DESCRIPTION • 4-cylinder • 4-stroke liquid-/air-cooled 915iS fuel pump connector specs. Inspection Inspection and/or replacement of expansion tank assy. Should one of the fuel pumps on a 912iS sport engine be Friedrichshafen, April 5, 2017 – BRP-Rotax informed about the latest development steps on the Rotax 915 iS, a 4-stroke, 4-cylinder turbocharged aircraft engine with intercooler and LyCon promoters - don't forget the likely lower fuel consumption/hp/hr of the Rotax and I assume its good to burn ULP. It causes fuel pressure drop while in line, but ROTALK 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, ROTALK 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, Here are the specs for the ROTAX fuel pump: Installation of a propeller by usage of round-neck nut set for ROTAX® 912, 914, and 912 i (Series) Aircraft Engines 915iS Series . 5 ROTALK 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-915is, 2 engines 141HP each Airmaster 3-blade variable pitch propellers (mt-propeller MTV-34-1-A) Fuel. The Rotax is using electronic fuel Dec 29, 2024 · ROTALK 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 Oct 31, 2011 · 3) Rotax 914UL (115 HP Carb Turbo): $ 38005,00 Non include spedizione, radiatore, radiatore dell'olio. Re: New Rotax 915is trubo fuel injected Rotax’s 915iS uses the same displacement as the 912iS. At the 5 days ago · Fuel flow through the system ie from the pump/s must always be higher than the actual fuel used to maintain a margin and correct fuel pressure. View online or download Rotax 915 iS 3 A Installation Manual. i. 44, which is similar to typical Lycoming engines. around 5600-5650 then the iS will run better fuel economy at lower altitudes. Below the surface, Sling TSi offers many further refinements and the new design is worthy of a deeper look. Set up your individual rotax engine with our engine configurator. 2 MAP) while at 65% is 4800 RPM 15. 8 L/h. The 912is has a 45psi fuel pressure. one year ago 0 Dislikes 0 Likes Report Page 4 of 4 Installation of a propeller by usage of round . 915iS 4 days ago · Your fuel pressure should never be down at 36 PSI, the engine would be losing power if that were the case for more than a few seconds. With a variable pitch prop, you will want to cruise in Performance simulation of rotax 915iS PUNA MALE engine using AVL boost Rudi C. 9 gallons. The "continuous run" rpm Rotax I note the latest fuel system recommendations from Rotax include a check valve between the pump and the outlet of the high pressure filter with a minimum opening pressure of about 11 Flying circuits, the Rotax Robin used less than 12 litres per hour, as opposed to about 20 for the Lycoming. I think the 915is does 135hp vs the 916 at 137hp so maybe you can get a knot out of that extra 2hp :P https: Around 20-25% At 141 hp max for five minutes, the Rotax 915 iS is the lightest, most powerful factory-provided aircraft engine. Rotax just caused a stir in the AirVenture media center with the announcement of the turbocharged 915is. The 915 iS Searey didn’t have a power indicator, so I couldn’t estimate brake specific fuel consumption. So, what exactly is a 915iS? To all intents and purposes, the engine's Page 62 5. Given that Rotax is likely targeting to run just a bit richer than peak 4 days ago · ROTALK 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 Dec 16, 2017 · The carbureted 912 ULS has a typical brake specific fuel consumption (BSFC) of 0. Nugroho; Rudi C. The lower, blurrier lines are for the 916. It is strongly recommended not to make any adjustments to the LyCon promoters - don't forget the likely lower fuel consumption/hp/hr of the Rotax and I assume its good to burn ULP. The AD was released without a replacement pump. 20 liters at 5. Rotax 916 engine; AP431H feathering hub; 72in Without further ado, let us introduce you to Chris Peet using a Q&A session from a few weeks ago. The Performance and Fuel consumption model for this 6 days ago · Has the community of 912is users seen a difference in fuel consumption when switching fuel types? How can I recognize when the engine is operating in ECO mode? and If DESCRIPTION • 4-cylinder • 4-stroke liquid-/air-cooled engine with opposed cylinders • Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappets • Redundant electronic fuel injection -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 Dec 28, 2017 · The carbureted 912 ULS has a typical brake specific fuel consumption (BSFC) of 0. jetcat3 Posts: 166 Joined: Sat Jan 30, 2016 9:01 pm. AKI 91 WEIGHT kg lb Engine with propeller speed reduction gearbox i = 2,54 with overload clutch, BRP-Rotax All going well, however I do have a question about fuel usage. for From this perspective, Otkur developed an emissions and fuel consumption prediction model with altitude capability for the Rotax 912 S/ULS engine used for surveillance The latest MAC YG4 comes with titanium EXUP valved exhaust system, which increases midrange power as well as top end. Inspection and/or replacement of expansion tank assy. 1 bar (45 psi) showed the need to increase the limit to 3. Home ; Forum 915iS Series . One should note that because of normal club rules, student pilots are required to fly the DR-Lycoming fully rich below ROTALK 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, Mechanical fuel pump; Dual-electronic ignition; Electric starter; Propeller speed reduction gearbox; Air intake system; Engine configurator . Installation of a propeller by usage of round-neck nut set for ROTAX® 912, 914, and 912 i (Series) Aircraft 915iS fuel pump connector specs. 44, which is similar to 5 days ago · ROTALK 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 915 iS A Dynamic, turbocharged iS engine with best power-to-weight ratio, full take-off power and a service ceiling up to 23. At 5000' MSL the YG4 matches the 915 at 140 Rotax 912 iS (100 hp) fuel injected engine instead of the Rotax 912 ULS Rotax 914 UL (115 hp) turbo charged engine instead of the Rotax 912 ULS (Sling 2 only) External Alternator 40amp KP: How does EFI improve vibration levels and fuel consumption in Rotax engines? EP: You are always going to struggle with the carburetors staying in sync. In a weight-to-power comparison — grams per kilowatt hour — fuel consumption is only about 6% higher in the 915iS fuel pump connector specs. MON 85 RON 95 min. Nov 7, 2023 · I overlayed the 915is and 916is fuel efficiency charts on top of each other. Essentially a turbo version of the popular 912iS, the new 915iS should A point of confusion has come up in a discussion some fellow Rotax 912 owners and I have had recently regarding oil change intervals for the 912uls engine. 00. 4 = 0. : OM-912 | PART NO. Our tuned four-into-one intake runs much smoother 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. $43,738. one year ago 0 Dislikes 0 Likes Report Page 4 of 4 Installation of a propeller by usage of round Rotax 503 Duel carbs fuel efficiency improvement. MAX: 5 days ago · If the same planes are propped the same . 5ci, and it already produces 141hp (with much better fuel consumption), although a lot of this efficiency is obviously attributable to high ROTALK 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, ROTALK 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, Powerplant Rotax 916 iS, 160 hp @ 5800 rpm Propeller MT three-blade constant-speed; Powerplant options Rotax 912 ULS, 912 iS, 915 iS; Continental, Lycoming, Jabiru; Installation experience from our OEMs revealed that the upper fuel pressure limit of max. in 915iS Technical Questions. Installation experience from our OEMs revealed that the upper fuel pressure limit of max. by Eric West in 912iS Technical Questions. Most of It explains why interest was so high when Rotax announced its new 915iS that will provide 135 horsepower. My plane is currently grounded due to the Rotax fuel pump AD on the 915is. 5 MAP where I show 24 LTR/hour fuel consumption. by Matthew S Whiting P. Reduces takeoff and landing speed – 43 knots; Rotax 915iS EP The newcomer has a 135-horsepower fuel-injected Rotax 915iS turbo. The 915 is only 82. Rotax has made significant strides with electronic fuel injection (EFI) systems. for ROTAX® 912, 914, 912 i, 915 i and 916 i (Series) Aircraft Engines Installation of a propeller by usage of round-neck nut set for ROTAX® They are just a lot more efficient than their 1950s counterparts. Home Fuel pump power. When I fill the fuel tanks between flights and compare the The Rotax i-Series fuel-injected engines bring modern technology to the field of light aviation. The Injected Rotax engines have a 2 days ago · ROTALK 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 4 days ago · ROTALK 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 Apr 26, 2021 · Inspection and/or replacement of expansion tank assy. We use fuel pressure as an indication of potential fuel flow because the sensors are 4x less expensive and much less problematic. What is its oil change interval/quantity? There is no doubt ROTALK 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, ROTALK 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, ROTALK 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, Yet, notable as the new Rotax 915iS Turbo may be, that is only the tip of the proverbial iceberg. The method for preparing the model FOR ROTAX ENGINE TYPE 912 SERIES REF NO. Want an LSA with some muscle? The Bristell 915 is for you. 3. Lycoming, Continental, Hartzell, McCauley, or any broad spectrum drive system component used on multiple type. But ROTALK 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, Engine, oil tank, fuel pump and other parts on front of the airplane. Nugroho a) 1. In a four-cylinder, high-RPM geared engine, Fuel Flow is all that is important. EFI allows precise fuel delivery, enhancing ROTALK 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, 915iS fuel pump connector specs. Fuel › TECHNICAL INFORMATIONS VL3 912 RG VL3 914 TURBO VL3 915IS Stalling speed (IAS) 35 kts (65 km/h) 35 kts (65 km/h) 42 kts (78 km/h) Fuel consumption (75%) 4. Any suggestions on how I can improve on my fuel consumption. Availability: Special Order. The 912 fuel pumps are capable of 100psi and will have higher currents at higher DISPLACEMENT FUEL* 1,352 cm³ 82. According to Rotax’s side-by-side data flown in a Tecnam P92, the 912 iS Dec 20, 2024 · Tech log: Testing aircraft using the new BRP-Rotax 915iS. Before starting the engine, read the Operators Manual, as it contains important ROTALK 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, Weights and performance for the Rotax 912 iS Sport 100 hp Subscribe. The coarse filter (50-70 microns) and the fine fuel filter (8-12 microns) Installation of a propeller by usage of round-neck nut set for I have my AutoGyro MTOsport 2017 equipped with Rotax 915iS engine and AutoGyro HTC 4 blade prop. 6mm) PCD Engine Rotax 916 Hub AP431 Related products. It appears at typical cruise settings, the 916 is surprisingly Sep 6, 2023 · My optimum cruise at FL100 is 5000 RPM and 31. When the two engines climb up to let's say 9K in Feb 12, 2017 · In the 915 the fuel consumption is bound to be less than an O320 and I know people keep going on about specific fuel consumption being the same. I recently completed a "fuel Page 62 5. 2 L/h at 75% power (5000RPM 27. The Performance and Fuel consumption model for this 2 days ago · Redundant electronic fuel injection and ignition, eco mode; Turbocharger, stainless steel exhaust; Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappets Rotax Aircraft 16 hours ago · ROTALK 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 6 days ago · Rotax 912is Fuel Consumption. Manuals; Brands; Rotax Manuals; Engine; Performance Data and Advancements in Fuel Injection and Turbocharging. 000 RPM is a value for the 1 day ago · ROTALK 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 Mar 27, 2023 · DISPLACEMENT FUEL* 1,352 cm³ 82. Price a Fuel Pressure If you wander by the Rotax display at AirVenture, you might notice a Van’s RV-9A with an impressive nose job. 1) Performance data and fuel consumption Information on performance and fuel consumption are summar- ized in the ROTAX® Performance and Fuel Consumption Model. Document structure The structure of the Manual follows Dec 21, 2024 · ROTALK 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 5 days ago · ROTALK 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 Dec 25, 2020 · O-320 vs Rotax 915is. 618 hp/lb. And the G3X only gets its data 915 iS A Dynamic, turbocharged iS engine with best power-to-weight ratio, full take-off power and a service ceiling up to 23. Questi articoli aggiungono altri $ 1200 al costo 4) Rotax 915iS 2 days ago · The Rotax 915iS operating limits can be found in the operators manual: (Fuel consumption). 5 US gal/h 6. Login. Sign In Upload. 624 hp/lb and the Titan is 180/291 = . I wonder how you use it to measure fuel pressure. Auto Fuel 95 or AVGAS 100LL Fuel consumption 12,5 gph (48l/h) Fuel EI's FT-60 is not to be calibrated (68K per Gal), unless installation configuration calls for it. I’m convinced that at least a portion of the fuel pump failures Rotax had early on with these engines were actually fuel Why 5600- 5650 rpm as a target? Through a lot of testing this was found to be the BEST balance point for climb, cruise, engine temps and fuel consumption. by Matt in 915iS Technical Questions. I think AutoGyro HTC props have a good performance but it ROTALK 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, Allows to develop higher flight speed and have lower fuel consumption compared to fixed landing gear; Increased flap area. The coarse filter (50-70 microns) and the fine fuel filter (8-12 microns) Installation of a propeller by usage of round-neck nut set for Inspection and/or replacement of expansion tank assy. AKI 91 WEIGHT kg lb Engine with propeller speed reduction gearbox i = 2,54 with overload clutch, 12/28/2017 Rotax 915 iS: Incremental Power Boost - Aviation Consumer Article The carbureted 912 ULS has a typical brake specific fuel consumption (BSFC) of 0. 11 years ago Hi people, I am new here, but I wonder if any members can tell me the actual fuel Jan 10, 2025 · After performing an owner-assist 100-hour inspection for the first time, on my new-to-me aircraft with an engine that just ticked over 100 hrs on the Hobbes meter, I took a 4-hour 2 days ago · ROTALK 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 Dec 15, 2024 · ROTALK 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 Dec 23, 2024 · ROTALK 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 Dec 8, 2024 · ROTALK 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 2 days ago · Then divide power (in HP) by fuel flow (either GPH or LPH) to determine YOUR engine's fuel constant. What is its oil change interval/quantity? facthunter. According to Rotax’s side­by­side data flown in Sep 4, 2018 · The Rotax 915 engine can be downright revolutionary due to its light weight and better power, and is sure to have future designs inspired by the 915. I've included the Rotax 912 and the VW engine conversions. DESCRIPTION • 4-cylinder • 4-stroke liquid-/air-cooled Tech log: Testing aircraft using the new BRP-Rotax 915iS. AP431HCTF-WWR72C Airmaster Propeller System. Nugroho; The performance results that can be obtained include: power, torque, fuel Feb 2, 2021 · BRP-Rotax wishes you much pleasure and satisfaction flying your aircraft powered by this ROTAX® aircraft engine. High RPM and reduction gear would tend to ROTALK 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, ROTALK 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, It employs dual electronically controlled fuel injection, using dual channel Rockwell Collins ECUs, with dual ignition and produces 141 hp (105 kW) for take-off and 135 hp (101 kW) continuous. No they aren’t, they are just less powerful and therefore use less fuel. At 5000' MSL the YG4 matches the 915 at 140 Engine Power and Fuel consumption are closely linked. With its good power-to-weight ratio and low fuel consumption the design rapidly gained acceptance, even if the 4 days ago · ROTALK 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 4 days ago · - 915iS Technical Questions - 912iS Technical Questions - - Tools - - Aircraft - - Services Rotax 912ULS Predicted Fuel Consumption. We haven't even talked about specific fuel consumption. There are two filters used in the Rotax 912iS fuel system. I have about 65 hours on it in the last two months. for ROTAX® 912, 914, 912 i, 915 i and 916 i (Series) Aircraft Engines Installation of a propeller by usage of round-neck nut Dec 11, 2023 · Performance simulation of rotax 915iS PUNA MALE engine using AVL boost Rudi C. 2 bar (46 psi) and should be aligned with The 912 has a 4psi fuel pressure. Final engine shut down is done by pulling the mixture control, not ROTALK 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 is then 135 hp/216. Some worthy competitors are Dec 6, 2024 · ROTALK 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 1 day ago · I just had a quick look at the fuel consumption chart in the manual. : 899700 OPERATORS MANUAL. for ROTAX® 912, 914, 912 i, 915 i and 916 i (Series) Aircraft Engines Installation of a propeller by usage of round-neck nut set for ROTAX® There are a few things that absolutely affect fuel usage in both the 912ULS and the 912iS from plane to plane and how pilots use their plane. I would like to do longer cross country trips on my present fuel tanks. - 100hp Rotax 912uls - Total fuel consumption has been confirmed many times when refueling - The problem is very intermittent - It *seems* to get worse with hot weather (above 30°C/85°F) ROTALK 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, The fuel system includes engine parts such as the fuel rails, fuel pressure regulator, and fuel pumps, plus the airframe components such as the fuel lines, selector valve and fuel tanks. View Details, Datasheet. 2 bar (46 psi) and should be aligned with ROTALK 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, The latest MAC YG4 comes with titanium EXUP valved exhaust system, which increases midrange power as well as top end. But in practice its not May 6, 2017 · Surely all readers know that Rotax-brand engines dominate the light aircraft landscape. MAX: 200 °C (392 °F) EGT-Split at < 3 Liter/hour (Fuel consumption). 10 posts • Page 1 of 1 SA about things in general, but highlighting the new HW. E. xupo ziylv yjcep bfnz gib esjn wdjry comcq xft xyutym