Design and Engineering
Article | January 7, 2022
Airplane travel is one of the most convenient means of transportation. Consequently, air travel is growing, and aircraft need to be more efficient. Furthermore, in the aftermath of the pandemic, the aviation industry appears to be committed to ensuring a sustainable airflight future. So, for this, aircraft need to be more efficient in production costs and fuel consumption.
An aircraft design depends on three of the most critical aspects. The first is the factor of reliability. Aviation is the only industry where it is impossible to overlook, rectify, or investigate a failed flight mechanism on the spot. The second factor is the need to minimize the weight and volume of its components to withstand load and fluctuating temperatures. And, the third factor is that it shows extreme concern from an environmental perspective. Temperatures on the ground can reach 60 °C and even -80 °C in the stratosphere, with supersonic aircraft reaching temperatures of over 200 °C.
As a result of these factors, the aircraft lubrication system and its requirements are critical. From an economic perspective, servicing and maintenance are a significant part of airlines' expenses after the purchase. In addition, the replacement of parts can cause airplanes to remain grounded for an extended period. Such circumstances can lead to a loss of time and money simultaneously.
From a safety aspect, failures at every level should be avoided. Failures like the shutdown of engines or breakage of engine parts can lead to aircraft failures or even crashes. So, by knowing all these issues around air travel, you can easily understand the interest in aircraft engine oil.
An Innovative Lubrication System for Aircraft Engine
Aircraft turbines revolve at up to 18,000 rpm (revolutions per minute). Due to this, internal temperatures can rise compared to the ambient temperature outside. So, aviation engines need an efficient oil-based lubricant to less pollute the environment and sustain long-distance air travel.
Recently, researchers in the EU-funded ELUBSYS project developed a novel way to use specified aircraft engine oil to promote efficiency and reliability. For this, SAF (Sustainable Aviation Fuel) is in high demand. Moreover, the project's innovative oil production will also help reduce an airline’s operating and maintenance costs. In this way, Europe’s aircraft manufacturers are way ahead in supporting future aircraft engine development.
“Aircraft engine turbines rotate at a very high speed with the help of the classic rubberized oil-seals used in the aircraft engine. The extremes of temperature and friction involved would destroy them. Yet aircraft engines need to stay lubricated.”
-Vincent Thomas of Techspace Aero in Belgium
Apart from this, the piston engine looks promising for the aviation piston engine industry. However, it seems like a piston engine holds an optimistic future in fuel economy. Now, with the inclusion of piston engines, there is more importance to using piston engine oil in the lubrication system for an aircraft engine.
So, how piston engine will be the game-changer for aircraft?
Piston Engine—A Game-Changer in Fuel Economy
Numerous aviation firms are developing a new type of internal combustion engine. Such engines promise a notable boost in fuel economy while also plummeting greenhouse gas emissions. In addition, start-ups like EcoMotors, Achates Power, and Pinnacle Engines are building variations on piston engines with the help of specific piston engine oil.
The engines serve as combustion chambers where fuel is ignited. That makes engines lighter in weight and faster in their operations with greater power density. In this way, piston engines result in less energy waste and thus operate more efficiently.
“The technology is worthwhile. However, it is a completely different concept compared to conventional engines,”
- Dean Tomazic, Vice President of FEV in Auburn.
There are more success stories from the aviation piston engine industry. These stories predict that, indeed, aviation is going through a significant transformation.
Another significant achievement comes from Pinnacle, based in San Carlos, Calif. It is developing a four-stroke, gasoline opposed-piston engine. The company’s founder, Monty Cleeves, invented a sleeve valve that ensures energy is used for propulsion instead of getting wasted after converting into heat.
Functions of the Lubrication System for Aircraft Engine Oils
What are the significant functions of lubricants in aviation oils and engines?
It is the function that realizes the importance of things. Isn’t it? So, to realize the importance of aircraft engine oils, it’s crucial to show the potential of the aircraft lubrication systems.
1 Friction and Wear Reduction
Lubricants reduce friction and wear in an aviation engine. The aircraft lubrication system deals with cooling, sealing, clearing, and fighting corrosion and rust in the engine.
Airplanes that are used seldom need the thorough protection from rust and corrosion that good aviation oils can provide. Also, frequently flying airplanes need lubricants for smooth engine operations and functions to avoid failures.
2 Acts as a Cooling Agent
But it is critical to use good aviation oils as lubricants. Oil is a heat-transform medium. Thus, a suitable oil should be used so that lubricants can keep the engine cool and smooth.
3 A life Saver of Aircraft Engines
Lubricants help in extending the life span of an aircraft engine. If an aircraft uses good aviation oil, for example, SAF, biofuels, and more, then there are fewer chances of any engine repairs. In this case, piston engines are the best fit for aircraft with high demand. Piston engines use highly lubricant piston engine oils, which increase the longevity of aviation engines.
Let’s look at some key takeaways from the market study of aircraft engine oil.
Aircraft Engine Oil: Key Takeaways from its Market Study
Commercial planes and business jets will likely witness high aircraft lubricant oil sales.
According to IATA, mineral oil demand is expected to rise by 25% by 2030.
Bio-based oils will dominate the aviation industry in response to soaring environmental concerns.
Maintenance, repair, and operations (MRO) activities will emerge as crucial parts of aviation to drive the global aviation lubricant market.
Lastly, what’s understood is that aircraft engine oil is the engine's lifeblood. Thus, the engine must function efficiently to encompass the length between overhauls.
Frequently Asked Questions
What does engine oil do in an aircraft?
Engine oil functions as a coolant. Up to 40% of an aircraft’s cooling comes from engine oil. Oil creates a seal between the piston rings, which reduces wear and friction andprovides better compression with increased fuel efficiency.
How is the engine oil lubricated?
Engine oil is lubricated with seals using air, which holds back the oil. Air and oil need to be separated. The air eventually vents out in the form of heat. That is why good oil is necessary for aircraft for lubrication.
What are the essential functions of engine oil?
The essential functions of engine oil are:
Minimizes friction and reduce wear
Cleans the engine
Transfers heat
Prevents corrosion
Forms a seal
Cools the engine parts
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Defense and Space
Article | June 8, 2022
When operating aircraft above the Arctic Circle (66.5° N latitude) there are certain hazards to be aware of. We decided to take a look at what aircraft are best suited for Arctic flight.A huge problem with flying in the Arctic is not just icing, but the visual restrictions that are placed on pilots. During the spring and fall, whiteout or flat light can distort what a pilot sees. The horizon can suddenly disappear making objects appear as if they are floating in the air. This can make things like mountain ranges extremely difficult to judge.
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Business Aviation
Article | January 7, 2022
A New System That Aims to Create Carbon-Neutral Aviation
Scientists have achieved an amazing breakthrough in the development of carbon-neutral fuel for the aviation industry. An aviation fuel production system that uses water, sunlight, and carbon dioxide has been put into action. Its design was published on July 20th, 2022, in the journal Joule. The dream of achieving carbon-free aviation could become a reality with this development.
“We are the first to demonstrate the entire thermochemical process chain from water and CO2 to kerosene in a fully-integrated solar tower system.” - Aldo Steinfeld, Professor, Study Corresponding Author, ETH Zurich
The aviation industry accounts for approximately 5% of the global anthropogenic emissions that contribute to global climate change. The industry heavily relies on kerosene, commonly known as jet fuel, a liquid hydrocarbon fuel derived from crude oil. There are no clean options to power commercial flights on a global scale at the moment.
Production of Synthetic Kerosene
This breakthrough, with the help of solar energy, makes it possible to produce synthetic kerosene from water and carbon dioxide instead of crude oil. The amount of CO2 emitted during kerosene combustion in a jet engine equals what is consumed during its production in the solar plant. It is what makes the fuel carbon neutral, especially if the CO2 in the air is captured and directly used as an ingredient, which could be possible in the near future.
As part of the European Union's SUN-to-LIQUID project, Steinfeld and his colleagues put forward a system that uses solar power to generate drop-in fuels—synthetic alternatives to fossil-derived fuels like kerosene and diesel. Solar-produced kerosene is consistent with the current aviation infrastructure for allocation, fuel storage, and use in jet engines. It can also combine with fossil-derived kerosene, according to Steinfeld.
High Hopes for the Future
Steinfeld and his team began scaling the construction of a solar fuel manufacturing plant at the IMDEA Energy Institute in Spain half a decade ago. The plant has 169 sun-tracking reflective panels that redirect and concentrate solar radiation into a tower-mounted solar reactor. This concentrated solar energy then powers redox reaction cycles in the reactor’s porous ceria structure, which is not absorbed but can be reused. It transforms the water and carbon dioxide into syngas, a customized mixture of hydrogen and carbon monoxide. This syngas is then injected into a gas-to-liquid converter and is finally converted into liquid hydrocarbon fuels such as kerosene and diesel. Steinfeld and his team are working on amping up the reactor’s efficiency from the current 4% to more than 15%.
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Aviation Technology
Article | June 2, 2022
This week, the GE Gas Power team launched season five of Cutting Carbon, their award-winning podcast that focuses on climate change, the basics of what decarbonization is and the technologies behind it. In season five, the team is focused on decarbonization closer to home and invited Arjan Hegeman, GE Aviation’s general manger for advanced technologies, to talk about the future of flight.
Learn more about the role of GE Aviation’s technologies available today and in development for tomorrow to make aircraft engines more fuel efficient and reduce carbon emissions. Open fan, hybrid electric and hydrogen combustion are all discussed by Hegeman and the hosts. Over two episodes, Hegeman also explains the importance of Sustainable Aviation Fuel (SAF), along with the new engine technologies, to help the aviation industry reach its goal of net-zero carbon emissions by 2050.
The Future of Flight is a two-part episode, and can be found as Episode 27 and Episode 28 under Cutting Carbon. You can listen to the podcast here or on your favorite streaming platform!
The aviation industry is at an inflection point for new technology introduction and acceleration of technology development, Hegeman says. GE Aviation is currently developing its next-generation suite of engine technologies, including open fan engine architecture, hybrid-electric propulsion, and advanced thermal management concepts. GE Aviation is also supporting industry initiatives to approve and adopt 100% SAF and is partnering on a new flight demonstration program to test zero-carbon hydrogen fuel combustion.
GE’s ambition is to be a net zero company by 2050, including the Scope 3 emissions from the use of sold products. GE is also committed to being carbon neutral by 2030 in its own facilities and operations, including Scope 1 and Scope 2 emissions.
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