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Rc 4 Channel Helicopters - Bookshelf

Performance Data From a Wind-Tunnel Test of Two Main-Rotor Blade Designs for a Utility-Class Helicopter

The aerodynamic characteristics of the RC(4)-10 airfoil have been obtained but have not been reported on at this time. ... The rotating-blade data are transferred through a 30-channel slip-ring assembly. Rotor forces and moments are ...



368 pages

The Son Tay Raid, American POWs in Vietnam Were Not Forgotten

Creator: John Gargus | 2010-09-28

There they would provide fuel for two Air Force Combat Apple RC-135Ms and for one radio relay RC-135. ... Their aircraft would be configured with additional equipment to monitor four more UHF channels used by the raiders.

Publisher: TAMU Press

About this book
In May 1970, Aerial Photographs Revealed what U.S. military intelligence believed was a Pow camp near the town of Son Tay, twenty-three miles west of North Vietnam's capital city. When American officials decided the prisoners were attempting to send signals, they set in motion a daring plan to rescue the more than sixty airmen thought to be held captive.On November 20, a joint group of volunteers from U.S. Army Green Berets and U.S. Air Force Special Operations Forces Perfectly executed the raid, only to find the prisoners' quarters empty; the POWs had been moved to a different location. Initially, the Son Tay raid was a devastating disappointment to the men who risked their lives to carry it out. Many vocal critics labeled it as a spectacular failure of our nation's intelligence network. However, subsequent events proved that the audacity of the rescue attempt stunned the North Vietnamese, who implemented immediate changes in the treatment of their captives. The operation also restored the prisoners' faith that their nation had not forgotten them.John Gargus not only participated in the planning phase of the Son Tay rescue, but also flew as a lead navigator for the strike force. This revised edition incorporates the most recent information from raid participants and also includes recent translations of North Vietnamese perspectives. No previous book on this top-secret action has given such a full account or such insight into both the execution and aftermath of Son Tay. This book will be an invaluable addition to the history and historiography of the Vietnam War.



168 pages

Maximum PC

2006-12

The sim ships with a USB controller that mimics an actual Futaba 4-to-10 channel transmitter. The controller includes inputs and patch cords to connect the transmitter from your own RC kit, if you prefer to use that instead, ...

About this book
Maximum PC is the magazine that every computer fanatic, PC gamer or content creator must read. Each and every issue is packed with punishing product reviews, insightful and innovative how-to stories and the illuminating technical articles that enthusiasts crave.


Helicopters Directory

4 Channel RC Helicopters - Hobbytron
Find the best selection of 4 Channel Helicopters at the lowest prices anywhere at HobbyTron.com.

Best 4 Channel RC helicopters | Top Ten RC Helicopters
Remote Controlled Helicopters are favorite of millions of hobbyists across the globe and 4 channel RC helicopters are certainly popular for a reason.

4-Channel Co-Axial RC Helicopters - Xheli
Electric coaxial rc helicopters, sometimes referred to as dual-rotor or contra-rotating helicopters, have been responsible for bringing thousands of new people into ...

4 Channel Rc Helicopters | UJToys.com - RC Toys | Remote ...
UJToys.com offers High Performance RC Helicopters and Accessories, RC Sports Cars, RC Boats and Spare Parts. Our online support team is always available to assist ...

4-Channel RC Helicopters - Nitroplanes.com
Exceed RC 2.4Ghz Falcon 40 V2 4-Channel RC Helicopter RTF Fixed Pitch - 100% Ready-to-Fly w/ Lipo Battery & LCD Transmitter Monitor (Blue) 8/3/2010


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Editor's picks

  • UDI

    New with Video Camera! UDI U13A 3 Channel 2.4GHz Metal RC Helicopter w/ Video Camera

    Toy (UDI)

    Rating (140 reviews):
    (3.8/5)
    UDI

    Weeeeeeeeeeeeeeee!

    This is my second one. I broke the first using a pipe to get it out of a tree. Why buy another? It is without a doubt the best rc video helicopter I have received here. I intend to buy several more so I can rotate them when I am out and about flying them. Keeping one charged while we fly the others....thats how much fun these are. Durable? You bet! Outdoor flying? Not the greatest if there are any winds aloft at all, but on a calm day, there is nothing better than flying this toy over and over and videotaping your exploits. I have flown up to about 30 meters, and could have gone higher, but the darned thing was hard to see. Incredibly stable, you will find yourself flying this helicopter through increasingly more difficult paths, as it is rock steady when it is calm out.BUY THIS! for the money, it is amazing.As with anything, there are pros and cons. I guess in keeping with the other comments, the cons of this helicopter is that flying outdoors is a challenge if there is any... 5/5 Dave Francis (Bellevue, WA, US) - See all my reviews = Durability:, December 1, 2012

    Nice all black, good quality camera, stable flight.

    I received this today and charge it right away for test flight. It is very solid, as nice looking as Syma brand S031G only a bit smaller. Charging time is 20-30 min, and flight time is 5-7 min quite short. If you can upgrade the battery to keep it longer in the air that would be more fun. The 2.4G transmitter is neat, it's not bulky and has an electronic display. Binding take some time, i don't know why, my transmitter sometime takes up to full 5 min for it to bind with the black bird. But once they both hooked up, it's fun to fly. Operating the camera/still photo is no brainer. There are one button for each action on the transmitter, on or off, however it take some time to get used to. The slot for the SSD is as easy to operate as in any p/s cameras, insert the card, soft push to eject it. Over all, it's nice. But with the price of $50+, it's a little expensive. The "party light" led display along the tail boom is just sicken me (my kids love it); and annoying as well making it look... 4/5 Kevin - See all my reviews = Durability:, June 26, 2012

    New with Video Camera! UDI U13A 3 Channel 2.4GHz Metal RC Helicopter w/ Video Camera

    0 5/5 Brandon G. Racine "WRENCHRIGHT" (ROUSES POINT, N.Y.) - See all my reviews, November 6, 2012
    4-in-1 infra-red receiver assemble 3-axis gyro, ESC, mixer and receiver
    Metal alloy frame with elastic blades and flybar endure crash. Transmitter supports 3 channels for 3 heli fly at the same time
    channels for 6 directions: up, down, forward, backward, turn clockwise and anti-clockwise
    Good quality helicopter with camera to take pictures and videos
    Over charging protection prolong life span of Lipo battery. Over current protection technology


  • Syma

    Syma X1 4 Channel 2.4G RC Quad Copter - UFO

    Toy (Syma)

    Rating (523 reviews):
    (3.9/5)
    Syma

    Critical Piece of Instruction....

    We were disapointed in this toy on Christmas morning. It was impossible to fly - it just went sideways as soon as it took off and nothing we did seemed to calibrate it sufficiently to hover. The instruction manual says "After charging the aircraft the light will flash for ten seconds. Turn on the aircraft and controller and wait for flashing lights to indicate the aircraft is ready for flight." What it fails to mention is that it is critical to place the "aircraft" on a flat surface at his time IMMEDIATELY after inserting the battery. The model then apparently is able to calibrate itself and will hover reasonably stablely. The online manual clued me in to our mistake (we were probably holding the model in our hands in an un-level position for the first dozen seconds after plugging in the battery)"When insert the charged battery, quad copter will into automatic detection state (the indicator light flashing swift in the first ten seconds when power on) at that time,... 4/5 D. Reading (Houston, TX USA) - See all my reviews, December 26, 2012

    $50 of Awesomeness

    Let me preface by saying that I own around 40 RC helicopter ranging from high end $3000 gassers to cheap $25 fp toys. This was my first quad. I bought this at the 49.99 price point and have no regrets even though they are now 39.99This has been the best $50 that I have spent in a long time. There are so many things going for this kit, where do I begin.The Good-Incredibly durable. I have crashed countless times from goofing around and flying indoors and have yet to cause any permanent damage. Even though this is a cheap product they made good choices in durable materials.-Very stable and easy to fly. My wife has no experience with helicopters, but I was able to get her to try this out in our living room.-Stable in outdoor conditions. I was surprised at the ability to fly this in light-breeze conditions.-Payload capacity. For fun, I strapped an iPod nano to the bottom to shoot video. This weighs 35 grams and the quad seemed to be able to... 4/5 Gadget Junkie (Bay Area,, CA United States) - See all my reviews Verified Purchase(What's this?) This review is from: Syma X1 4 Channel 2.4G RC Quad Copter - UFO (Toy) Let me preface by saying that I own around 40 RC helicopter ranging from high end $3000 gassers to cheap $25 fp toys. This was my first quad. I bought this at the 49.99 price point and have no regrets even though they are now 39.99This has been the best $50 that I have spent in a long time. There are so many things going for this kit, where do I begin.The Good-Incredibly durable. I have crashed countless times from goofing around and flying indoors and have yet to cause any permanent damage. Even though this is a cheap product they made good choices in durable materials.-Very stable and easy to fly. My wife has no experience with helicopters, but I was able to get her to try this out in our living room.-Stable in outdoor conditions. I was surprised at the ability to fly this in light-breeze conditions.-Payload capacity. For fun, I strapped an iPod nano to the bottom to shoot video. This weighs 35 grams and the quad seemed to be able to... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , November 23, 2012

    Revised instructions - UPDATED

    ***** UPDATED Jan. 11, 2014 **********I had a couple of people tell me that they could not get their copter transmitters to connect. After playing with the sequence a bit, we found that on some copters (not all... go figure) the TX should be turned on and initialized BEFORE the copter gets to the gyro initialization process - which makes it even more important to be ready to set it on a level surface before plugging the battery in. Anyway, this sequence change seems to address the problem some of the copters were having. The instructions have been updated to reflect this change.Now back to your regularly scheduled review...*****************************************I've been in R/C for 30+ years, and was very involved in R/C helis. This was my first quadcopter, and have enjoyed it very much. The hardest thing about this copter is getting it out of the box. Lots of cheap fun, and definitely a gateway drug to the hobby-grade... 4/5 Melsman (Central California) - See all my reviews Verified Purchase(What's this?) This review is from: Syma X1 4 Channel 2.4G RC Quad Copter - UFO (Toy) ***** UPDATED Jan. 11, 2014 **********I had a couple of people tell me that they could not get their copter transmitters to connect. After playing with the sequence a bit, we found that on some copters (not all... go figure) the TX should be turned on and initialized BEFORE the copter gets to the gyro initialization process - which makes it even more important to be ready to set it on a level surface before plugging the battery in. Anyway, this sequence change seems to address the problem some of the copters were having. The instructions have been updated to reflect this change.Now back to your regularly scheduled review...*****************************************I've been in R/C for 30+ years, and was very involved in R/C helis. This was my first quadcopter, and have enjoyed it very much. The hardest thing about this copter is getting it out of the box. Lots of cheap fun, and definitely a gateway drug to the hobby-grade... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , November 16, 2013
    Two Fly Mode:Indoor/Outdoor
    2.4GHz Radio control
    Controlling distance: About 40 Meters
    3 way precision controller: up/down, left/right, forward/backward
    Stabilty and agility in flight simplify professional 3D maneuvers like pirouettes 3D fun flips,rolls,and more.


  • Syma

    Syma X1 4 Channel 2.4G RC Quad Copter - Spacecraft

    Toy (Syma)

    Rating (540 reviews):
    (4.2/5)
    Syma

    Syma X1 Quad Bind Process / Radio not working

    Hey fellow owners and potential owners!Noticed others are having the same problem my buddies and I had when I first received the Syma X1 Quad, they should UPDATE THE INSTRUCTIONS ASAPI had an issue with the radio transmitter not binding with the Syma X1 quad and there IS A EASY SOLUTION.The instructions are lacking in this area and are responsible I'm sure with a lot of frustration and probably returns.In between my friends and I we have over 6 of these to date, they all work with this procedure that I quickly wrote for another amazon user.SYMA X1 QUAD - RADIO TRANSMITTER BIND PROCESSIMPORTANT SOLUTION TO ALL OWNERS - RADIO NOT WORKING WITH THE SYMA X1 QUAD1. CONNECT BATTERY TO QUAD, THE LED WILL FLASH SLOWLY2. LED WILL BEGIN TO FLASH RAPIDLY,.... IMMEDIATELY TURN ON RADIO TRANSMITTER3. LED IS SOLID, BIND PROCESS COMPLETE. READY TO FLYAfter connecting the battery to the quad the led will... 4/5 Amazon Customer (USA) - See all my reviews = Durability:, December 13, 2012

    how to switch from mode 1 to mode 2

    Excellent little machine. When I first turned it on and tried to fly, it flew sideways into the wall. Tried several times with the same result.solution: First, make sure that transmitter is off. Place battery into unit and immediately place it on the floor or other level surface. Wait for unit to stop flashing rapidly and is flashing slow, THEN make sure that throttle is off and turn on the transmitter, unit will pair with a steady light and an audible beep.Happy flying. Remember it is a 4 channel. I have yet to flip it, just not enough room where I fly indoors and I have yet to determine where the 'A' button is to change it from mode 1 to 2.FOUND IT!! thankfully!!Transmitter offHold right horizontal trim button to the rightPower on transmitterrelease trim buttondisplay now reads Mode 2Myself... I am so much happier with the unit now that I found mode 2. I am used to flying coaxials in this mode and... 4/5 Custom Communications "customcommunications" (massachusetts, usa) - See all my reviews, December 21, 2012

    Tough and Great flying machine

    This is an incredible tough little flying machine and a great way to get in to the world of RC flying and quad copters.I have purchased various indoor and outdoor RC flying toys and this is the first one that has made it intact after the first week.First the toy, it comes with a decent 2.4ghz transmitter with a short rubber antenna which can't break unlike the old steel ones of years gone by. The flying instructions look quite complicated but who really reads a manual anyhow and the only way to learn is by practice and it does take a while.The Quad comes fully assembled and once charged it is ready to fly. Charging time is about an hour and flight time is over 10 minutes. I think continuous fly time would be around 6 - 7 minutes but it will be a good few days until you can keep it in the air for over 1 minute.We have crashed this endless times, landed in the tallest of trees, got tangled in branches, my garden is now littered with long poles... 5/5 furnic (Florida, USA) - See all my reviews = Durability:, November 16, 2012
    Two Fly Mode:Indoor/Outdoor
    3 way precision controller: up/down, left/right, forward/backward
    360° Eversion
    2.4GHz Radio control
    The latest 3-axis flight control system with adjustable gyro sensitivity that permits super stable flight.


  • NC Metal Gyro

    Newest NC Model Gyro 3.5 Channels Metal RC Helicopter - Free USB & AC Charger - Value of $14 -

    Toy (NC Metal Gyro)

    Rating (20 reviews):
    (2.8/5)
    NC Metal Gyro

    It sucks

    0 1/5 Mohammad Amin Abou Harb - See all my reviews, July 4, 2011

    Great for the Price but missing AC Charger on all that I bought

    0 1/5 Renee - See all my reviews = Durability:, December 7, 2011

    Kyanite 3.5 Channel rc helicopter

    0 1/5 gadget hobbyist - See all my reviews = Durability:, March 7, 2011
    List Price: $79.95
    Price: $18.99
    You Save: $60.96 (76%)
    Brand New in Retail Packaging: - NC New Gyro 3.5 CH Metal Mini RC Helicopter - Remote Controller (required 6 AA batteries , not included)- 1 Spare tail rotor (Free)- 1 Spare Blade A & 1 Spare Blade B (Free)- 1 USB Cable (Free)- AC Home Charger (110V)- Instructions manual
    Length : Approx. 7.5 Inches. Width : Approx. 1.65 Inches.Height: Approx. 4.5 inches (from landing gear to balance bar).Main Rotor Surface Diameter: Approx 7.1 Inches.Weight : Approx. 1.4 Ounces.Suitable for Indoor flight or outdoor with NO wind .Suitable for Children 14+ ages.
    The first Gyro 3.5 Channels Metal RC Helicopter. Better than the famous Syma S107. 3 colors to choose from.
    This newest NC Gyro 3.5 CH Mini Metal RC Helicopter can be charged directly from the Remote Controller, or directly from your PC/Laptop by using the included USB Cable (Free), or charged from AC Adapter (included).
    This new 3.5 channels Gyro Metal can fly up, down, left, right, forward and backward, plus it let you control the speed, you can either fly in low or high speed by simply switch the speed control button.


  • Syma

    Syma S33 3 Channel RC Helicopter 2.4ghz (Black)

    Toy (Syma)

    2.4ghz radio frequency technology
    Flashing lights with search light allows helicopter to be seen in low light situations
    Gyro Technology allows helicopter to be more stable
    High speed and low speed function
    Double Protection, helicopter throttle will power off automatically when blades are caught


  • SkyMaster

    SkyMaster 7" Mini RC Remote Control Helicopter, 4 Channel Infrared Remote Control Built-In Gyroscope with Metal & Plastic Frame, Multiplayer Up To 3 Helicopters

    CE (SkyMaster)

    Build-in gyro
    USB charger
    LED Light
    Indoor Flight
    Battery protection Board


  • Syma

    Syma S108G 3.5 Channel RC Helicopter with Gyro

    Hobby (Syma)
    List Price: $69.99

    Motor Type: Brushed
    Great for Beginners
    Battery Type: Lithium Polymer (LiPO Battery)
    Easy to Fly
    Stable Flight Characteristics


  • Syma

    Syma X1 4 Channel 2.4G RC Quad Copter - BumbleBee

    Toy (Syma)

    Rating (113 reviews):
    (4.3/5)
    Syma

    Capable, Durable, and Fun Quadcopter!

    The Syma X1 is an excellent entry-level quadcopter. It is durable (already survived 100+ crashes), relatively easy to fly, and an impressive value. It is suitable for indoors and outdoors use and I can't recommend it enough for any looking to get into R/C quadcopters or simply looking for something fun to try out.Design/Build:The Syma X1 is a very basic model - it has the four propellers, plastic frame, small electronics board, and a thin plastic cover (either a UFO, Bumblebee, or Spaceship - simply aesthetic). It is very light and the battery (included) clips into the undercarriage of the craft. I was surprised at how durable this quadcopter was - I've crashed it countless times into walls, ceilings, down the stairs, etc. Each time I cringe slightly at the sound, but the worst that has happened is the battery has popped out. Also, Syma includes an extra set of propellers in case you do damage any of them.Remote Control:Again, a very... 5/5 Arbitrage (Boston, MA) - See all my reviews = Durability:, March 14, 2013

    The Most fun!

    0 4/5 Amazon Customer - See all my reviews = Durability:, December 26, 2012

    Don't forget ....

    I was completely new to RC aircraft. This was the 1st time I'd had the belief that it wouldn't be killed by my lack of coordination. So far, it is still working.#1 - calibration is needed every time the battery is pulled. DO NOT SKIP THIS STEP. See the manual for the necessary steps. It took me 3 charge cycles to figure this out.#2 - The guide is Engrish - really, really bad Engrish. After re-re-re-re-reading the 2nd page with the description of the features, I still haven't a clue. Would have been nice if any reference to the numbered buttons was included. The large diagram was useable. Mode A/B ... I still haven't a clue.#3 - Fun!So I'm not at the level of being able to hover yet. Afraid to take it outside - cold and wet here.Get a few extra flying batteries. 7 minutes is just not enough time. So far none of my crashes have been bad enough to break anything.Really wish there was an On/Off switch on the... 5/5 TunaMan "Engineer Nerd" (Georgia USA) - See all my reviews Verified Purchase(What's this?) This review is from: Syma X1 4 Channel 2.4G RC Quad Copter - BumbleBee (Toy) I was completely new to RC aircraft. This was the 1st time I'd had the belief that it wouldn't be killed by my lack of coordination. So far, it is still working.#1 - calibration is needed every time the battery is pulled. DO NOT SKIP THIS STEP. See the manual for the necessary steps. It took me 3 charge cycles to figure this out.#2 - The guide is Engrish - really, really bad Engrish. After re-re-re-re-reading the 2nd page with the description of the features, I still haven't a clue. Would have been nice if any reference to the numbered buttons was included. The large diagram was useable. Mode A/B ... I still haven't a clue.#3 - Fun!So I'm not at the level of being able to hover yet. Afraid to take it outside - cold and wet here.Get a few extra flying batteries. 7 minutes is just not enough time. So far none of my crashes have been bad enough to break anything.Really wish there was an On/Off switch on the... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , December 29, 2013
    2.4GHz Radio control
    3 way precision controller: up/down, left/right, forward/backward
    The latest 3-axis flight control system with adjustable gyro sensitivity that permits super stable flight.
    360° Eversion
    Two Fly Mode:Indoor/Outdoor


  • V911-04 Connection buckle (set) RTF V911 4CH 4 Channel 2.4GHz Single Blade RC Radio Control Helicopter with Gyro part

    Single Detail Page Misc

    Rating (2 reviews):
    (5.0/5)

    Buckle set

    0 5/5 Lost Pilot - See all my reviews Verified Purchase(What's this?) This review is from: V911-04 Connection buckle (set) RTF V911 4CH 4 Channel 2.4GHz Single Blade RC Radio Control Helicopter with Gyro part If you fly very much you will certainly be needing these parts, just a matter of learning where they go in the helicopter.... 0 Help other customers find the most helpful reviews  Was this review helpful to you? , May 9, 2013

    Solid design

    0 5/5 Jim Best - See all my reviews Verified Purchase(What's this?) This review is from: V911-04 Connection buckle (set) RTF V911 4CH 4 Channel 2.4GHz Single Blade RC Radio Control Helicopter with Gyro part Although this is a micro heli part, the design is perfect and the strength is great for something so small 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 3, 2013


  • Cool City Trading

    38cm Double Horse 9116 2.4GHz 4CH 4 Channel RC Single Blade Helicopter Gyro Big 450 Size (COLORS MAY VARY)

    Toy (Cool City Trading)

    Rating (188 reviews):
    (3.5/5)
    Cool City Trading

    Great single rotor, four channel helicopter!!

    I purchased my Double Horse 9116 from a seller on Ebay. Got a great deal on it as well ($89.88- current price) with free shipping. I was very pleased with my experience from the Ebay seller.What's in the box?You will receive a very nice looking DH9116 4 channel electric helicopter measuring 19.5 inches in length if you stretch the main and tail rotors out front to back and measure tip to tip. It stands 5.5 inches tall if measured from the bottom of the skids to the top of the main rotor assembly. Main rotor length is 15 inches. The DH9116 is fully assembled and ready to fly (after it's charged). You will also receive a four channel, mode 2 radio with a high/low rate switch and four trim buttons. The radio also sports a lighted LCD screen that shows trim and stick positions as well as battery life. The menu button allows for stick reversing and set up for left or right handed flyers. You will also receive a wall charger, plug and manual.What is "Mode... 5/5 Kenneth Marcum "Harley Man" (Fort Wayne, IN. USA) - See all my reviews, December 30, 2011

    Big step up from the toy 3ch copters

    Someone already wrote a really nice review of this copter so I'll keep this fairly short. First and foremost, if you think you know how to fly helicopters from flying 3ch coaxial helicopters, you don't. Although they have provided you with some of the physics of rotary flight, they've also provided you with a huge comfort level in that they are able to hover continuously. Forget most of that with this one.A 4ch single rotor is getting the user closer to collective pitch flying will still providing a greater degree of safety via being able to hover for brief periods and with some input from the flyer. More challenging but a lot more fund when you've mastered it. This is a great beginner copter for someone who hopes to progress to 6ch CP and likes to fly outdoors. Most coaxials do very poorly in the wind, this does better. Still not great but able to be confidently flown in 5mph breezes.The copter itself is very well made IMO. Real hobbyists will... 5/5 tom4416 "bookie monster" (Virginia) - See all my reviews, January 18, 2012

    Love flying this heli! Great value.

    This was an upgrade from my strictly indoor dual-rotor helicopter. I had mastered the easy 3-channel Syma, and wanted to try a single rotor 4-channel. I have never flown any RC helicopters prior to the Syma, nor do I have any real-life aircraft piloting experience.Your experience may differ from mine, but thought I would share. I do not think the 9116 is an indoor helicopter, as it requires a lot of free open space to safely fly (without damaging the helicopter). It takes about 1.25 to 1.5 hours to fully charge the helicopter, and once you are used to flying this heli, it will be a LONG 1.5 hours to wait! It is slightly idiosyncratic at times, but "resets" easily when you turn off and turn on the helicopter (when it starts to act erratically after a full charge, at the beginning of your... 5/5 ppmd "Professional" (Arizona, USA) - See all my reviews = Durability:, February 11, 2012
    Gyro stabilization system
    Helis battery: 7.4/650mAh Li-po battery ( Included)
    Flight distance: About 100 meters
    Products Function: Up and down, turn left and turn right, forward and backward, Left flying and right flying ,Gyro function with light
    Controler battery: 6*AA Batteries (Excluded)


Helicopters