Today’s top helicopter drones offer impressive specs for every skill level. You’ll find options ranging from 5-34 minute flight times, with models like the RC Helicopter and Wipkviey T28 leading in battery life. Advanced features include altitude hold, gyro stabilization, and HD cameras up to 1080p. For beginners, look to the VATOS RC or Cheerwing S107G with user-friendly controls. From indoor practice to outdoor photography, these drones pack cutting-edge tech into increasingly affordable packages. Discover which features match your flying goals.
Key Takeaways
- Battery life ranges significantly from 5-34 minutes, with dual-battery systems and higher mAh ratings providing longer flight times.
- Advanced stability features like gyro systems, altitude hold, and one-key controls make newer models more beginner-friendly.
- Top models include crash-resistant materials, LED lights, and protective guards for enhanced durability and safety.
- Indoor-focused models offer better stability but limited range, while outdoor models provide extended range with wind limitations.
- Most recommended drones feature 2.4GHz technology, automated landing systems, and varying speed modes for different skill levels.
RC Helicopter with 30 Mins Flight Time, LED Lights and Altitude Hold
- Experience the Fascinating Lights and Demo Mode: The flying aircraft has brilliant lights that can change into 7 attractive colors, providing an eye-pleasing visual...
- Enjoy the Ease of Use: This radio controlled helicopter performs a stable hover with its an Upgraded Gyro system. Release your control, and it will hover in position,...
- Experience Great Durability: With a single modular battery, you can enjoy 15-17 minutes of flight time; two batteries doubles your joy to 30-34 minutes. The helicopter...
The RC Helicopter with 30-minute flight time stands out as an ideal choice for both beginners and intermediate pilots who want extended flying sessions without frequent battery swaps.
You’ll appreciate the dual-battery system providing up to 34 minutes of total flight time. The helicopter’s upgraded gyro system delivers rock-solid stability through one-key take-off/landing and altitude hold features. With 7 vibrant LED colors and engaging flight modes like circle fly and auto-rotation, you’re getting both functionality and flair.
The durable PVC body and alloy structure protection help prevent damage from inevitable learning curves, while thorough safety features include over-charge protection and anti-interference technology. It’s perfect for indoor flying and developing valuable STEM skills.
Best For: Beginners and intermediate RC pilots aged 8+ looking for an indoor helicopter with extended flight time and engaging features for skill development.
Pros:
- Exceptional flight time with two batteries providing up to 34 minutes of combined operation
- Advanced stability features including gyro system and altitude hold make it easy for newcomers
- Durable construction with protective features and comprehensive safety measures
Cons:
- Limited to indoor use due to size and lightweight design
- Each battery requires charging time between flights
- May be too basic for advanced RC helicopter enthusiasts
Wipkviey T28 Mini Drone with 1080P HD Camera
- Easeier To Use: Multiple remote control methods and one-key operating functions are exclusively designed for beginners. You can switch the button control, mobile app...
- Altitude Hold Mode: When the wind is weak, the drone can hover automatically with one button. This mode ensures that the drone hovers stably at a certain height in the...
- 360° Flip: Press the flip button and control the right joystick, the drone will rotate 360° in the air. press the “One Key Start/Landing” button, and the drone will...
Looking for a beginner-friendly drone that won’t break the bank? The Wipkviey T28 Mini Drone packs impressive features into a compact package. With its 1080P HD camera and 90° adjustment capability, you’ll capture crisp aerial shots and videos with ease.
What makes this drone stand out:
- Dual control options via remote or app
- Three speed modes perfect for learning
- 24-minute total flight time (two 1000mAh batteries)
- User-friendly features like one-key takeoff/landing
- Gesture selfie and headless mode
While it’s not ideal for windy conditions, the T28’s propeller guards and altitude hold make it a solid choice for indoor flying and calm days. You’ll appreciate its foldable design and beginner-friendly controls as you master the basics of drone piloting.
Best For: Beginning drone enthusiasts, kids, and casual users looking for an affordable indoor/outdoor drone with basic camera features and easy controls.
Pros:
- Long flight time with two included batteries (24 minutes total)
- Multiple beginner-friendly features (altitude hold, one-key operations, propeller guards)
- Good value with included accessories and 1080P HD camera
Cons:
- Poor performance in windy conditions
- Some users report quality control issues
- Limited range and basic camera capabilities compared to higher-end drones
Remote Control Helicopter with LED Lights for Kids 6
- Engaging LED Light Effects：This RC helicopter features dynamic LED lights that change through multiple vibrant color modes, creating a captivating visual experience for...
- Stable Flight with Altitude Hold & Easy Controls：Equipped with an upgraded gyro system, this helicopter offers exceptional stability. When you release the controls, it...
- Longer Playtime & Durable Design：Enjoy up to 30-34 minutes of flying with two included batteries (15-17 minutes per battery). The sturdy PVC body and reinforced landing...
Designed for young aviators aged 6 and up, this LED-equipped RC helicopter brings vibrant entertainment and learning to budding pilots. You’ll get impressive flight times of 15-17 minutes per battery, with two batteries included for extended play sessions.
The upgraded gyro system guarantees stable hovering and precise control, while the 2.4GHz technology prevents interference. You’ll appreciate the one-key takeoff/landing feature and adjustable speed settings that help master flying skills gradually.
Beyond entertainment, this helicopter develops essential skills like hand-eye coordination and spatial awareness. The durable PVC body and alloy frame withstand learning curves, while safety features protect both the drone and its pilot.
Best For: Young beginners ages 6+ who want to learn RC helicopter flying with a safe, durable, and visually engaging starter drone that offers extended playtime.
Pros:
- Long flight time with two included batteries providing up to 34 minutes total flying time
- Advanced stability features including gyro system and one-key controls make it easy for beginners
- Built-in safety features and durable construction with PVC body and alloy frame
Cons:
- Limited to indoor use only
- May require frequent battery charging for continuous play
- Basic features may not satisfy more advanced users as skills improve
RC Foam Airplane Drone with Light and Auto Hovering
- The rc airplane is not suitable for windy outdoor conditions, as it will be difficult to control.
- Durable and Safe Design: Constructed from lightweight foam material, ensuring durability. The propellers are enclosed by a protective guard for safety, reducing the risk...
- Exciting Movement Capabilities: This kid-friendly drone measures 10 inches and offers a variety of stunt flying options including circle fly, 3D flips, auto rotation, and...
For young pilots and beginners seeking a safe introduction to RC aircraft, HOLYFUN’s foam airplane drone strikes an ideal balance between durability and performance. You’ll get up to 18 minutes of flight time with two included 3.7v batteries, while the protective propeller guards keep pilots and property safe.
The drone’s three-speed modes let you progress at your own pace, while features like one-key takeoff/landing and headless mode help build confidence. You’ll master stunts like 3D flips and auto-rotation within the 164-foot control range. Just keep it indoors when it’s windy – this 10-inch foam flyer performs best in calm conditions.
- Flight Time: 15-18 minutes
- Control Range: 164 feet
- Key Features: Auto-hover, LED lights, 360° flips
- Ages: 8+
Best For: Beginning pilots ages 8+ looking for a safe, durable indoor drone to learn basic flight controls and stunts.
Pros:
- Beginner-friendly features like auto-hover and one-key takeoff/landing
- Durable foam construction with protective propeller guards for safety
- Long flight time with two included batteries (up to 18 minutes total)
Cons:
- Not suitable for outdoor use in windy conditions
- Limited control range of 164 feet
- Some customers report inconsistent performance based on 3.9/5 rating
VATOS RC Helicopter with Remote Control & Super Functions
- All in 1 Super Function - This is a 2.4Ghz rc helicopter with a full range of features: 360° flip, intelligent obstacle avoidance, LED light, one-key take off/landing,...
- 360° Flip and Smart Obstacle Avoidance - One key 360° flip executes impressive flips to make flying more attractive; the RC helicopter has a smart obstacle avoidance...
- Easy to Control & Stable Flight - Equipped with gyroscope balance system and also with fine adjustment correction function. The remote control can easily control the...
The VATOS RC Helicopter stands out as the ideal starter drone for families seeking both entertainment and learning value. With its 2.4GHz frequency and advanced gyroscope system, you’ll enjoy precise control and stable flights right from day one.
Key Features:
- 360° flips and intelligent obstacle avoidance
- One-key take-off/landing and altitude hold
- Dual speed modes for beginners and experts
- LED lights for night flying visibility
- 15-minute flight time per battery (2 included)
You’ll appreciate the drone’s durability and user-friendly design, featuring protective blade covers and foldable wings. Whether you’re 6 or 60, the VATOS makes mastering RC flight accessible while offering enough advanced features to keep you challenged as your skills grow.
Best For: Beginners, families, and first-time drone enthusiasts looking for a user-friendly RC helicopter with safety features and room for skill development.
Pros:
- Comprehensive safety features including obstacle avoidance and protective covers
- Two batteries included for extended play time (15 minutes each)
- Easy-to-use controls with one-key functions and dual speed modes
Cons:
- 15-minute flight time per battery may be limiting for extended play sessions
- Made in China, which may raise quality consistency concerns
- Limited range compared to more advanced RC helicopters
Large RC Helicopter with Remote Control (2 Batteries)
- Oversized 75cm body, domineering appearance, alloy frame anti-fall material, it is your extra large remote control helicopter!
- Use of environmentally friendly non-toxic materials; rechargeable. Products after several tests, owns resistance to fall, the wings are not easy to break, etc. Not easily...
- Durable Alloy Body - RC helicopter helps to protect the interior and ensure its crashworthiness. Because of its design, the helicopter is stable and stable when flying.
Aspiring pilots aged 8-12 will find their perfect introduction to RC flight with this substantial 75cm helicopter drone. The alloy frame and anti-fall design promise durability, while 16 groups of LED lights add visual flair to every flight.
You’ll appreciate the included dual batteries and environmental-friendly materials, though be prepared for some assembly challenges. The 3.5-channel remote control offers decent maneuverability, but you’ll need patience to master the controls.
Key Specs:
- Dimensions: 29.5″ x 3.5″ x 9.4″
- Weight: 2.46 pounds
- LED groups: 16
- Control channels: 3.5
- Batteries: 2 included
While crashworthiness and break-resistant wings are highlights, the 2.9/5 star rating suggests reliability concerns, particularly with the back propeller and blade durability.
Best For: Young RC enthusiasts ages 8-12 who want to learn helicopter flight basics and can handle some trial and error in the learning process.
Pros:
- Comes with two batteries included for extended play time
- Features 16 groups of LED lights for exciting visual effects
- Durable alloy frame with crash-resistant design
Cons:
- Poor reliability with frequent propeller and blade failures
- Assembly can be challenging and parts may arrive crooked
- Difficult control system that takes significant practice to master
FPV Foldable HD Drone with Camera for Beginners
- 1080P HD Camera Adjustable FPV Drone & APP Control-- Equipped with an adjustable-angle 1080P HD camera, this drone is capable of capturing stunning aerial photos and...
- Multiple Functions for Kids Beginners--Features: optical flow positioning, barometric altitude hold, 3D flips, headless mode, three-speed modes, one-key...
- Foldable Drone, Full Accessories, Thoughtful design-- The package includes a portable bag for convenient outdoor travel. Equipped with two 1050mAh batteries, enjoy an...
Beginners seeking their first drone will find an ideal entry point with Velcase’s S101 FPV Foldable HD Drone. You’ll get a solid mix of user-friendly features, including one-key controls, gesture photo capture, and voice commands. The 1080P HD camera lets you share aerial shots directly to social media.
Key features you’ll appreciate:
- 26-minute flight time with two 1050mAh batteries
- Three-speed modes for skill progression
- Optical flow positioning for stable hovering
- Built-in propeller guards for crash protection
- Portable design with foldable body
While it handles minor crashes well, you’ll want to avoid strong winds. The 4.2-star rating from over 2,600 users suggests reliable performance for its price point.
Best For: First-time drone pilots and casual users wanting an affordable, feature-rich camera drone with user-friendly controls and safety features.
Pros:
- Long flight time with two batteries included and stable hovering capabilities
- Multiple beginner-friendly features like one-key controls and propeller guards
- Good value with 1080P HD camera, gesture controls, and social media sharing
Cons:
- Poor performance in windy conditions with stability issues
- Connection problems reported by some users
- Misleading packaging claims regarding certain features
C128 Scout Drone with 1080P Camera, Military Remote Control Helicopter
Military-style remote control enthusiasts seeking professional-grade aerial reconnaissance will find their match in Luminda’s C128 Scout Drone. This sleek black helicopter-style drone delivers 1080P video capture through its CMOS sensor with a respectable 120-meter range.
You’ll appreciate the 6-axis gyro system and automated take-off/landing features, though you’ll need to watch the 7-knot wind limitation. The 580mAh battery provides decent flight time, and the drone’s 1.54-pound frame holds up well to crashes. While the app requires a credit card and replacement props aren’t readily available, the drone’s durability makes it a solid choice for intermediate pilots who don’t mind these trade-offs.
Best For: Intermediate drone pilots seeking a durable, military-style reconnaissance drone with good video quality and automated features within a mid-range budget.
Pros:
- Reliable 1080P video capture with adjustable camera positioning
- Durable construction that withstands crashes well
- User-friendly features including 6-axis gyro and automated take-off/landing
Cons:
- Limited wind resistance (only up to 7 knots)
- Replacement propellers difficult to source
- App requires credit card information for access
SYMA S51H RC Military Helicopter with Remote Control
- Simulated Fighter: Based on the military helicopter, the details of the fighter are highly restored and the workmanship is elaborate, satisfying the military nostalgia of...
- One-key Take off/landing: Ready to use out of the box! Simply press the one-key take off/landing on the remote control, and the syma helicopter can automatically take off...
- Altitude Hold: Equipped with a smart chip, the rc helicopter for adults can hover automatically without controlling the throttle and maintaining the altitude; Equipped...
RC helicopter enthusiasts searching for an authentic military experience will find their match in the SYMA S51H. This Apache-inspired model delivers impressive specs with its dual motors and smart flight features.
Key Features:
- One-key takeoff/landing with auto-hover at 1.5m
- Built-in gyroscope for stability
- 25m control range with 2.4GHz remote
- LED lights for visibility
- Double protection system
You’ll appreciate the smooth handling and intelligent obstacle detection, though you’ll need to master minor throttle adjustments. The 2-hour battery life lets you practice your piloting skills, while the thorough safety features protect your investment. Perfect for indoor flying, this educational toy develops coordination and spatial awareness while delivering military-grade thrills.
Best For: Indoor flying enthusiasts ages 8-15 who want a stable, military-style RC helicopter with smart features for learning and practicing basic flight skills.
Pros:
- Impressive safety features including obstacle detection and emergency shutoff
- Smart flight controls with one-key takeoff/landing and auto-hover capabilities
- Complete package with spare parts and educational value for developing coordination
Cons:
- Limited 25-meter control range restricts outdoor use
- Requires practice to master throttle control and landing
- Battery issues reported after approximately 4 months of use
Cheerwing S107/S107G Phantom Mini RC Helicopter with Gyro
- 3-channel, Remote Control
- 2 Selectable Frequencies to Switch
- Upgrade Gyro System
The compact Cheerwing S107/S107G Phantom stands out as an ideal choice for indoor flight enthusiasts who don’t want to break the bank. With its 3.5-channel control system and upgraded gyro stabilization, you’ll enjoy precise handling and steady hovering capabilities.
Key Features:
- 5-7 minute flight time
- USB charging capability
- Colorful flashing lights
- Dual frequency options
- Durable plastic construction
While it’s best suited for indoor flying, you’ll need to be careful with outdoor conditions, as even light breezes can affect stability. The intuitive controls and reasonable price point make it perfect for beginners, though you might find the battery life limiting. At 16.8 inches long, it’s small enough to maneuver in tight spaces while maintaining impressive durability for minor crashes.
Best For: Indoor hobbyists and beginners seeking an affordable, easy-to-fly RC helicopter for practicing basic flight controls and maneuvers.
Pros:
- Stable flight performance with upgraded gyro system
- Durable construction that withstands minor crashes
- User-friendly controls with dual frequency options
Cons:
- Short battery life of only 5-7 minutes
- Limited to indoor use due to wind sensitivity
- Plastic body construction instead of metal
Factors to Consider When Choosing a Helicopter Drone
When you’re investing in a helicopter drone, you’ll need to weigh several key factors that’ll determine your flying experience. The flight time, range capabilities, and integrated safety features like propeller guards and emergency landing systems should top your checklist, while stability control and camera quality will directly impact your ability to capture stunning aerial footage. You’ll also want to carefully consider the drone’s battery specifications, including charge time and the option for spare batteries, as these elements can make or break your aerial adventures.
Flight Time and Range
Flight time and range represent critical factors that can make or break your helicopter drone experience. You’ll find most modern drones offer flight times between 5 and 34 minutes per charge, depending on their size and motor efficiency.
To maximize your air time, you’ll want to evaluate:
- Battery capacity (450-1050 mAh)
- Number of included batteries for swapping
- Operational range (25-164 feet)
- Wind resistance capabilities
- Altitude hold features
Your drone’s effective range typically relies on 2.4GHz frequency technology, reaching distances of up to 50 meters in ideal conditions. Keep in mind that environmental factors like wind can greatly impact both flight duration and range. For extended sessions, look for models that come with multiple batteries – you’ll be able to swap them out and keep flying for up to 34 minutes total.
Safety Features and Protection
Modern helicopter drones come packed with safety features that can mean the difference between smooth sailing and costly crashes. You’ll want to look for models that incorporate gyroscopic stabilization systems to keep your drone steady and prevent unwanted dips or spins during flight.
Protection doesn’t stop there – here’s what to prioritize:
- Propeller guards or protective enclosures to shield both the drone and nearby objects
- Thorough battery safety mechanisms including overcharge and low voltage protection
- Clear low battery alerts through LED indicators or audio warnings
- Anti-interference technology operating on 2.4GHz frequency
These features aren’t just fancy add-ons – they’re essential safeguards that’ll keep your investment airborne and protect both your drone and those around it. When comparing models, make safety features a top consideration alongside performance specs.
Stability and Control System
A rock-solid stability system forms the backbone of any high-performing helicopter drone, determining how smoothly and precisely you’ll be able to maneuver through the air. Today’s leading models pack impressive tech to keep you flying steady.
Look for these essential stability features:
- Advanced gyroscopic systems that automatically correct orientation shifts
- Altitude hold capability using barometric and optical sensors for precise hovering
- Headless mode that aligns controls with your position, perfect if you’re just starting out
- 2.4GHz anti-interference technology for reliable control up to 164 feet
- One-key take-off and landing for smooth, automated flight maneuvers
You’ll want to prioritize drones that combine these elements effectively. The best models seamlessly integrate these systems, giving you confident control whether you’re capturing aerial footage or simply enjoying recreational flights.
Camera and Video Quality
Image quality stands at the forefront of what you’ll want to evaluate when selecting a helicopter drone in 2025. You’ll need at least 1080P resolution to capture those breathtaking aerial shots with crystal-clear detail and professional-grade sharpness.
Look for drones equipped with adjustable camera angles and FPV capabilities. These features let you experiment with different perspectives while maintaining real-time visual contact with your drone’s viewpoint. Advanced stabilization systems, including gyroscopes and altitude hold, are essential for eliminating unwanted camera shake.
Key features to evaluate:
- High-resolution camera (1080P or better)
- Multi-angle camera adjustment
- First-person view (FPV) transmission
- Built-in stabilization technology
- MP4 video format compatibility
These elements work together to guarantee you’ll capture smooth, professional-quality footage that’s easy to edit and share.
Battery Life and Charging
Beyond capturing stunning aerial footage, you’ll need reliable power to keep your helicopter drone flying. Today’s top models offer flight times ranging from 5 to 34 minutes per battery, with capacities between 450 mAh and 1050 mAh.
Key Battery Considerations:
- Flight Duration: Standard single-battery performance ranges from 5-17 minutes
- Safety Features: Built-in low battery alerts assure safe landing before power depletion
- Extended Use: Dual-battery setups can double your airtime to 24-34 minutes
- Smart Charging: LED indicators help prevent overcharging and optimize battery life
Pro Tip: Always keep a spare battery charged and ready. You’ll want to swap batteries quickly when that low-power warning kicks in, especially during those perfect shooting conditions when every minute counts.
Size and Portability Options
Selecting the right size and portability features for your helicopter drone can make or break your flying experience. Today’s models offer impressive flexibility, with weights ranging from a mere 1 ounce to over 2 pounds.
Key size considerations:
- Foldable designs compress to half their original size, fitting easily in backpacks
- Lightweight models under 1.5 pounds provide superior handling for travel
- Compact drones under 10 inches excel in tight spaces
- Ultra-slim 3-inch widths with carrying cases maximize portability
For everyday adventurers, you’ll want to focus on drones that balance size with functionality. If you’re planning to travel frequently with your drone, opt for foldable models with integrated storage solutions. Indoor flyers should prioritize smaller frames, while outdoor enthusiasts might prefer slightly larger, weather-resistant designs that maintain portable dimensions.
Indoor Vs Outdoor Use
Understanding where you’ll primarily fly your helicopter drone shapes every aspect of your purchase decision, from essential features to size requirements.
For indoor flying, you’ll need:
- Advanced gyro stabilization and altitude hold
- Compact size for maneuvering tight spaces
- Protective propeller guards
- Precise hovering capabilities
- Quick-access charging options
Outdoor operations demand:
- Wind-resistant construction
- Extended battery life with low power alerts
- Higher speed settings
- Larger frame for stability
- Durable materials
If you’re planning to use your drone both indoors and out, prioritize models with adjustable flight modes. Indoor settings should focus on stability and safety features, while outdoor modes can maximize speed and range. Consider dual-purpose drones that offer protective guards for indoor use that you can remove for outdoor adventures.
Build Quality and Durability
Whether you’re flying indoors or outdoors, the build quality and durability of your helicopter drone will determine how well it withstands daily use and inevitable mishaps. You’ll want to focus on models featuring reinforced plastics or metal components that can take a beating without falling apart.
Look for these key durability features:
- Protective propeller guards to prevent damage during collisions
- Shock-absorbing landing gear that cushions impact
- Balanced frame design for improved stability
- Impact-resistant materials that maintain structural integrity
The drone’s overall weight and construction materials play a vital role in its longevity. A well-built drone should feel solid yet maintain efficient flight characteristics. When comparing models, test the frame’s rigidity and examine the quality of connecting points – these areas often reveal the true durability of the craft.
Frequently Asked Questions
How Do Helicopter Drones Perform in Strong Winds Compared to Regular Drones?
You’ll find that helicopter drones typically handle strong winds better than traditional quadcopters due to their larger, more powerful single rotor design. They’re more stable in gusts up to 20-25mph, while regular drones often struggle above 15mph. However, you’ll need more skill to pilot them effectively. Their main drawback? They’re usually heavier and less agile than standard drones, so they’re not ideal for quick maneuvers in windy conditions.
Can Helicopter Drones Be Modified With Aftermarket Parts for Better Performance?
Yes, you can modify helicopter drones with various aftermarket parts to enhance their performance. Common upgrades include:
- Higher-capacity batteries for extended flight time
- Upgraded motors for better lifting power
- Carbon fiber propellers for improved efficiency
- Enhanced flight controllers for steadier handling
- LED lighting kits for night flying
- Camera gimbals for smoother footage
However, you’ll need to make sure modifications don’t exceed the drone’s weight limits or compromise its structural integrity.
What Safety Certifications Should I Look for When Buying a Helicopter Drone?
When selecting safety-certified helicopter drones, you’ll want to prioritize proper protections. Look for these key certifications:
- CE marking (European safety standard)
- FCC certification (US communications compliance)
- RoHS certification (hazardous substances)
- UL certification (electrical safety)
- ISO quality standards
You’ll also need to verify your drone meets your country’s aviation authority requirements, like the FAA in the US. Don’t forget to check for encrypted controls and emergency failsafe features.
Are There Specific Drone Insurance Requirements for Helicopter-Style Drones?
You’ll need liability insurance for your helicopter drone, especially if you’re flying commercially. Most standard policies start at $1M in coverage. Check these key requirements:
- Recreational use: Your homeowner’s policy may cover it, but verify drone inclusion
- Commercial use: Dedicated aviation insurance is mandatory
- Weight class: Heavier helicopter drones often need higher coverage
- Location: Different regions have varying minimum requirements
Consider monthly plans that let you adjust coverage as needed.
How Often Should Rotor Blades Be Replaced on a Helicopter Drone?
Just like changing your car’s tires after a certain mileage, your drone’s rotor blades need regular replacement. You’ll typically need to replace your helicopter drone’s rotors every 20-30 flight hours, though this varies based on:
- Flying conditions (rough weather accelerates wear)
- Flight style (aggressive maneuvers cause more stress)
- Material quality (carbon fiber lasts longer than plastic)
Don’t wait for visible damage – regular inspections and proactive replacement will keep you safely in the air.
