What is ‘Greased Lightning-10 (GL-10)’, recently in the news?
Contents16
- AElectric plane tested by NASA
- BSolar-powered two-seater aircraft designed by Japan
- CSpace observatory launched by China
- DReusable rocket designed by ISRO
Show answer
Answer: (A) Electric plane tested by NASA
Answer: (a) Electric plane tested by NASA
Greased Lightning-10 (GL-10) has 10 electric engines that can take off vertically (like helicopter) then tilt wings to fly horizontally (like airplane).
Fully electric, no fossil fuels.
Why not others?
- (b) Solar aircraft by Japan - GL-10 is by NASA, electric not solar.
- (c) Space observatory by China - It is a plane.
- (d) Reusable rocket by ISRO - It is a plane.
GL-10 is NASA's experimental aircraft with 10 electric engines that can take off vertically like a helicopter then tilt its wings to fly horizontally like an airplane.
This was part of NASA's push toward electric aviation around 2015-2016, making it a current affairs topic for that exam cycle.
UPSC is testing whether students can distinguish between different types of experimental aircraft - electric vs solar-powered vs space technology vs rockets.
NASA Greased Lightning GL-10
Science And Technology Greased Lightning-10 GL-10
NASA Greased Lightning GL-10: Electric VTOL Aircraft
GL-10 is NASA's experimental electric aircraft with 10 electric engines
Combines vertical takeoff (helicopter mode) with horizontal flight (airplane mode)
Fully electric - no fossil fuels, zero emissions during flight
Part of NASA's distributed electric propulsion research program
What Makes GL-10 Special
The Greased Lightning-10 represents a breakthrough in electric aviation technology. Unlike conventional aircraft, it uses distributed electric propulsion - multiple small electric motors instead of one large engine. This design enables unique flight capabilities that solve key aviation challenges.
VTOL capability: Takes off vertically like a helicopter, no runway needed
Efficient cruise: Tilts to horizontal flight for energy-efficient forward motion
Zero emissions: Fully electric operation during flight
GL-10 vs Other Aircraft Types
Aircraft Type | Takeoff Method | Power Source | Primary Use | Example |
|---|---|---|---|---|
GL-10 | Vertical (VTOL) | Electric batteries | Research/Future cargo | NASA experimental |
Conventional Aircraft | Horizontal runway | Jet fuel/Gasoline | Commercial/Military | Boeing 737, F-16 |
Helicopter | Vertical | Jet fuel | Rescue/Transport | Apache, Mi-17 |
Solar Aircraft | Horizontal runway | Solar panels | Long endurance | Solar Impulse |
GL-10 Flight Process
%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
s1["`**Vertical Takeoff**
**10 electric engines** point upward, aircraft rises like helicopter`"]
s2["`**Transition Phase**
Wings and engines **tilt forward** during climb`"]
s3["`**Horizontal Flight**
Engines now point forward, flies like conventional airplane`"]
s4["`**Landing Transition**
Engines **tilt back to vertical** for controlled descent`"]
s1 --> s2
s2 --> s3
s3 --> s4GL-10 in Flight
Source: Reddit — NASA's Greased Lightning Ten-Engine Electric Plane Prototype ('can ... · www.reddit.com
Question Context
This 2016 UPSC question tested knowledge of contemporary aerospace developments. The correct answer required recognizing GL-10 as NASA's electric aircraft, not confusing it with solar-powered planes, space observatories, or rockets from other countries.
Trap: Confusing electric (GL-10) with solar-powered aircraft - different energy sources
Trap: Mixing up space agencies - GL-10 is NASA (USA), not ISRO (India) or China
Trap: Aircraft vs spacecraft confusion - GL-10 is an airplane, not a space observatory or rocket
Electric Aircraft Technology
Science And Technology electric
Electric Aircraft Technology & Future Aviation
Electric aircraft use electric motors powered by batteries instead of combustion engines
Distributed propulsion uses multiple small motors rather than few large engines
Advantages: Zero emissions, lower noise, reduced maintenance costs
Current limitation: Battery weight restricts range and payload capacity
Technology Overview
Electric aircraft represent the next frontier in sustainable aviation. They replace traditional combustion engines with electric motors powered by rechargeable batteries. This shift enables new aircraft designs and flight capabilities while addressing environmental concerns in aviation.
Electric Aircraft Components
# Electric Aircraft System
## Power Source
- Lithium-ion batteries
- Fuel cells
- Hybrid systems
## Propulsion
- Electric motors
- Distributed engines
- Variable pitch propellers
## Control Systems
- Flight computers
- Motor controllers
- Battery management
## Advantages
- Zero emissions
- Low noise
- High efficiency
- Simple maintenanceElectric vs Conventional Aircraft
Aspect | Electric Aircraft | Conventional Aircraft |
|---|---|---|
Fuel/Power | Rechargeable batteries | Jet fuel/Gasoline |
Emissions | Zero during flight | High CO2 and pollutants |
Noise Level | Very low | High engine noise |
Range | Limited (50-500 km) | Long range (1000s km) |
Maintenance | Lower - fewer moving parts | Higher - complex engines |
Current Status | Experimental/Small aircraft | Mature technology |
Key Players & Applications
NASA X-57 Maxwell: 14-motor distributed electric propulsion demonstrator
Urban air mobility: Electric aircraft for city transport (air taxis)
Training aircraft: Electric planes for pilot training programs
Cargo drones: Large electric UAVs for package delivery
Regional aviation: Short-haul passenger flights under 500 km
Trap: Don't confuse electric (battery-powered) with solar (solar panel-powered) aircraft
Trap: Electric aircraft are still experimental for large passenger service - not yet commercial
Trap: Range limitation is the key challenge - not speed or altitude
Major Aerospace Agencies
Science And Technology NASA
Major Aerospace Agencies & Their Focus Areas
NASA (USA) leads in space exploration, Mars missions, and advanced aircraft research
ISRO (India) focuses on cost-effective satellites, Mars/Moon missions, and launch services
CNSA (China) rapidly expanding with space station, Mars rover, and lunar programs
JAXA (Japan) specializes in planetary exploration and space technology partnerships
Key Aerospace Agencies
Agency | Country | Major Focus Areas | Notable Recent Projects |
|---|---|---|---|
NASA | USA | Deep space exploration, Mars missions, advanced aircraft | Perseverance rover, Artemis Moon program, GL-10 |
ISRO | India | Cost-effective satellites, planetary missions | Chandrayaan-3, Mangalyaan, PSLV launches |
CNSA | China | Space station, lunar exploration, Mars missions | Tiangong station, Chang'e lunar program, Tianwen-1 |
JAXA | Japan | Planetary exploration, technology demonstration | Hayabusa2 asteroid mission, BepiColombo |
ESA | Europe | Earth observation, space science, launchers | James Webb telescope, ExoMars, Ariane rockets |
NASA Research Areas
# NASA Programs
## Space Exploration
- Mars missions
- Artemis Moon program
- Deep space probes
- ISS operations
## Earth Science
- Climate monitoring
- Weather satellites
- Ocean studies
- Atmospheric research
## Aeronautics
- Electric aircraft (GL-10)
- Supersonic flight
- Urban air mobility
- Green aviation
## Technology Development
- Propulsion systems
- Life support
- Materials science
- AI and roboticsIndia-Specific Context
ISRO achievements: World's most cost-effective Mars mission (Mangalyaan at $74 million)
Recent success: Chandrayaan-3 successful Moon landing in 2023
Gaganyaan mission: India's first crewed spaceflight program under development
Commercial space: ISRO's PSLV popular for international satellite launches
Space policy reforms: Private sector participation encouraged through IN-SPACe
UPSC Relevance
UPSC frequently tests current aerospace developments from major agencies. Students must distinguish between agencies by country and their signature projects - NASA's advanced research, ISRO's cost-effective missions, China's rapid expansion, and Japan's specialized exploration programs.
Trap: Mixing up agencies by country - NASA = USA, ISRO = India, CNSA = China
Trap: Don't assume all space news is from NASA - ISRO and China are very active
Trap: Reusable rockets - SpaceX leads this, not ISRO (though ISRO is developing RLV-TD)