This lesson sorts drones by how they fly and what powers them. It covers fixed-wing, rotary-wing and hybrid VTOL designs, the Drone Rules 2021 size classes and India’s 2026 drone numbers. It also explains why UPSC 2025 Q42 had the answer “None”.
Contents
What should I know first about UAV types?
What is a UAV?
A UAV is an unmanned aerial vehicle. It flies with no pilot on board. A remote pilot or an autopilot controls it.
Where are UAVs used?
PIB says drones are used in India for land surveys and precision agriculture. They also help with infrastructure checks, disaster management and defence.
Precision agriculture means giving a crop only what it needs, where it needs it. Example: Namo Drone Didi gives drones to women self-help groups for farm work. Card 9 shows how drones also map village land.
Why do the types matter?
One design cannot do every job. A research paper says some missions need the speed and endurance of a fixed-wing aircraft. They also need the hovering and vertical take-off of a multi-rotor. That need led to hybrid designs.
Sources: PIB drone backgrounder, the uses, Hybrid VTOL research paper, the need.
How are UAVs sorted by design?
The sorting depends on how the craft gets its lift.
What are the main groups?
A university extension page says fixed-wing and multirotor are the two main types. A research paper lists three basic groups. They are fixed-wing, multi-rotors and blimps. The paper says hybrids sit between these groups.
What does this lesson use?
This lesson uses three groups:
- Fixed-wing: Rigid wings give the lift.
- Rotary-wing: Spinning rotors give the lift.
- Hybrid VTOL: Rotors lift off and wings do the cruising.
VTOL means vertical take-off and landing.
Sources: Mississippi State UAS types page, the types, Hybrid VTOL research paper, the groups.
How does a fixed-wing UAV fly?
A fixed-wing UAV looks like an airplane.
Why does it fly longer?
The wing gives the lift. So the motor does not use all the battery power just to stay up. Some fixed-wing UAVs fly for over an hour on one battery. They can cover hundreds to over 1,000 acres.
What is the catch?
It needs an area to land. The Mississippi State page says crashes are more likely with a fixed-wing. A fixed-wing craft is also launched in a set way. The Shadow 200 uses a hydraulic rail launcher or a wheeled take-off.
Can it hover?
No. A research paper lists hovering and vertical take-off as multi-rotor strengths. It lists speed and endurance as fixed-wing strengths.
Sources: Mississippi State UAS types page, the wing, Army Technology, Shadow 200 launch. Also: Hybrid VTOL research paper, the strengths.
How does a rotary-wing UAV fly?
A multirotor looks like a helicopter with several rotors.
What can it do well?
It can take off and land almost anywhere. It is easier to learn to fly and to land. It can also hover.
What does it give up?
The rotors give all the lift. So the battery drains faster. The Mississippi State page gives 15 to 20 minutes of flight time.
How many rotors can it have?
A hex-copter has six. A quadcopter has four. The student fuel-cell paper tested a hex-copter.
Sources: Mississippi State UAS types page, the rotors, ASEE hybrid copter paper, the hex-copter. Also: Hybrid VTOL research paper, the rotors.
What is a hybrid VTOL UAV?
A hybrid VTOL UAV joins the two designs. The research paper calls this a dual flight envelope.
What does the dual envelope give?
It gives the speed and endurance of a fixed-wing craft. It also gives the hovering and vertical take-off of a multi-rotor.
What are the main kinds?
- Tail-sitters take off and land on their tail. They then pitch over into level flight. They are simple to build but hard to control.
- Convertiplanes keep the body level. They tilt a part, such as the wing or the motors, to change mode.
- Dual-system tilt-rotors use separate motors for up and for forward flight. The extra motors cut efficiency.
- Stop-rotors use a spinning wing to hover. The wing then stops and acts as a fixed wing.
What else is worth knowing?
Which UAVs can hover or land vertically?
Only some can. This is the core of the UPSC trap.
| Design | Hover | Vertical landing |
|---|---|---|
| Fixed-wing | No | No, it needs a landing area |
| Rotary-wing | Yes | Yes |
| Hybrid VTOL | Yes | Yes |
Why does the table say that?
The extension page says fixed-wing needs an area to land. It says multirotors land almost anywhere. The research paper lists hovering and vertical take-off among multi-rotor abilities. It says hybrids bring those abilities to a wing.
What follows?
“All types of UAVs can land vertically” is false. “All types of UAVs can hover” is false too. One fixed-wing example breaks both claims.
Sources: Mississippi State UAS types page, the landing, Hybrid VTOL research paper, the abilities.
What powers a UAV?
Not only batteries.
What do small drones use?
Most civilian drones use lithium-polymer batteries. The student paper says this. Batteries are light. But the energy they hold is limited.
What about fuel engines?
The Shadow 200 has a rotary engine and fuel tanks. Its endurance is 5 to 7 hours. So a UAV can run on fuel, not on a battery alone.
What about solar power?
Airbus says its Zephyr S ran exclusively on solar power. Its first flight began on 11 July 2018. It lasted 25 days, 23 hours and 57 minutes.
What about hydrogen?
The student paper says hydrogen holds 120 kJ per gram. It says lithium-polymer batteries hold about 1 kJ per gram. Their drone paired a hydrogen fuel cell with a battery. The battery covered the switch-on and switch-off of the fuel cell.
Sources: ASEE hybrid copter paper, the batteries, Army Technology, Shadow 200 engine. Also: Airbus Zephyr S release, the solar power.
How does India sort drones by weight?
The Drone Rules, 2021 use five weight classes. The weight counts the payload too.
| Class | Maximum weight |
|---|---|
| Nano | 250 g or less |
| Micro | Over 250 g, up to 2 kg |
| Small | Over 2 kg, up to 25 kg |
| Medium | Over 25 kg, up to 150 kg |
| Large | Over 150 kg |
Why are there classes?
The classes exist to grant exemptions. Light drones are easier to run, so they get fewer rules.
- Nano: no type certificate, no remote pilot licence and no third-party insurance.
- Micro: no remote pilot licence if the use is not commercial.
A type certificate is the approval that a drone model meets the rules. A remote pilot licence lets a person fly a drone from the ground. Example: a 200 g drone is nano. Its owner needs no remote pilot licence.
Is size the same as wing type?
No. A fixed-wing UAV and a multirotor can both fall in any weight class. Weight and design are separate ways to sort drones.
Sources: Bar and Bench, Drone Rules 2021 classes.
What does the 2026 data show?
Where does India stand in 2026?
PIB published a backgrounder on 17 February 2026.
How big is the system?
As at 9 February 2026, 38,575 drones had been registered. India had issued 39,890 remote pilot certificates. It had approved 244 remote pilot training organisations.
What help has the Government given?
- The PLI scheme for drones has an approved outlay of Rs 120 crore.
- GST on drones fell to a flat 5% in September 2025. The old rates of 18% and 28% were removed.
- Namo Drone Didi began in November 2023. It gives drones to women self-help groups.
- Under that effort, 1,094 drones have been given to women SHGs.
What is SVAMITVA?
SVAMITVA stands for Survey of Villages and Mapping with Improvised Technology in Village Areas. It was launched in April 2020. The Ministry of Panchayati Raj, the State Governments and the Survey of India run it. It uses drones to map the part of a village where people live.
Why did villages need it?
For decades, government surveys of rural land covered farm land only. The inhabited part of a village was left out. That part is called abadi land in Uttar Pradesh and Madhya Pradesh. It is lal dora land in Punjab and Haryana. It is gaothan land in Maharashtra and Gujarat.
So many families had no record of rights. A record of rights is a legal paper that shows who owns a property. Without it, an owner found it hard to use the house as security for a bank loan.
How does a drone map a village?
- First, fixed ground stations are set up. They are called Continuously Operating Reference Stations (CORS). They help fix exact ground points.
- Next, the Survey of India flies drones over the abadi area. The drones give high-resolution, accurate maps.
- Then the property cards are issued to the household owners, based on those maps.
Drones suit this job because the maps must be sharp enough to show each property boundary.
What does a property card do for the owner?
A property card is a legal ownership paper for a village house and its land. It helps in four ways:
- Loans: the owner can use the property to get a bank loan.
- Disputes: clear boundaries help settle fights over land.
- Tax: it helps fix property tax, which goes to the Gram Panchayat in States where it is passed on.
- Planning: the maps help prepare the Gram Panchayat Development Plan.
Example: Sukhlal Pargi of Falated village in Rajasthan got a patta and a property card. He used the card to get a bank loan of Rs 3 lakh quickly.
How far has it reached?
About 3.44 lakh villages are the target. As at December 2025, the drone survey was complete in 3.28 lakh villages. That is about 95% of the target.
By then, 2.76 crore property cards were ready for 1.82 lakh villages in 31 States and Union Territories. The survey comes first, so fewer villages have cards than surveys.
Sources: PIB drone backgrounder, the registrations, PIB, 5 Years of SVAMITVA, the scheme, PIB, SVAMITVA booklet 2021.
How did UPSC test UAV types? Exam practice
How did UPSC 2025 test this?
UPSC Civil Services Prelims 2025, General Studies Paper I, Q42.
With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:
1. All types of UAVs can do vertical landing.
2. All types of UAVs can do automated hovering.
3. All types of UAVs can use battery only as a source of power supply.
How many of the statements given above are correct?
Answer: (d) None.
Why is statement 1 false?
A fixed-wing UAV needs a landing area. Only rotary-wing and hybrid designs land vertically.
Why is statement 2 false?
Hovering is a multi-rotor strength. A fixed-wing UAV gets its lift from forward flight.
Why is statement 3 false?
The Shadow 200 runs on fuel. The Zephyr S ran on solar power. A hydrogen fuel-cell drone paired its cell with a battery.
Sources: Mississippi State UAS types page, the crashes, Army Technology, Shadow 200 fuel. Also: Airbus Zephyr S release, the flight.
How do I revise UAV types in one minute?
What should I remember about UAV types?
What are the key points?
- Fixed-wing: Wing lift. Longer flights. Needs a landing area. No hover.
- Rotary-wing: Rotor lift. Hovers. Lands anywhere. About 15 to 20 minutes on a battery.
- Hybrid VTOL: Rotors for take-off and landing. Wings for cruise.
- Power: Battery, fuel engine, solar, hydrogen fuel cell.
- Weight classes: Nano, micro, small, medium, large.
- 2026: 38,575 registered drones as at 9 February 2026.
Sources: Mississippi State UAS types page, the summary, Hybrid VTOL research paper, the summary. Also: PIB drone backgrounder, the villages.
What traps do examiners set on UAVs? Exam practice
What do examiners test about UAVs?
What are the traps?
- “All types.” One counterexample makes the statement false.
- Hover or not. Fixed-wing cannot hover. Rotary-wing and hybrid can.
- Battery only. Fuel, solar and hydrogen also power UAVs.
- Weight or wing. Nano to large is weight. Fixed to hybrid is design.
- Long flight. A long flight does not mean battery power. Zephyr S ran on solar power.
- Numbers. Always read the as-at date on a drone count.
Sources: Mississippi State UAS types page, the traps, Airbus Zephyr S release, the record. Also: Bar and Bench, Drone Rules 2021 summary.
Review your 6 understanding checks
Review the feedback after each answer. The understanding-check score lasts for this page session.
Reset the checks when you want another attempt. This score is separate from the practice score below.
This score resets when the page reloads.
Questions to think through
Why can a camera quadcopter mislead you in an exam?
It hovers and runs on a battery. A reader may assume all UAVs do the same. Fixed-wing UAVs do not hover. Some UAVs run on fuel or solar power.
Why does a hybrid VTOL UAV need two ways to fly?
Hovering costs a lot of energy. A wing cruises with less. So a hybrid uses rotors to rise and a wing to travel far.
Why is a 2 kg drone “micro” and a 3 kg drone “small”?
The Drone Rules cut the classes at fixed weights. Micro stops at 2 kg. Anything over 2 kg and up to 25 kg is small.
Why should you check the date on a drone count?
The number grows. The PIB count of 38,575 is as at 9 February 2026. A later count will be higher.
Sources: Mississippi State UAS types page, the groups, Hybrid VTOL research paper, the design. Also: Bar and Bench, Drone Rules 2021 weights.
MCQ on UAV Types
Test hover and landing, power sources, hybrid VTOL and the UPSC 2025 question. Read the explanation after each answer.
0 of 1 answered Question 1 of 1 0 of 1 answered Question 1 of 1 0 of 1 answered Question 1 of 1 0 of 1 answered Question 1 of 1 0 of 1 answered Question 1 of 1
Leave a Reply