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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.


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RC Helicopters – Nitroplanes
New Dynam Vortex M100 Infrared RC Micro Helicopter 3.5 Channel RTF + Transmitter with Gyro (Red) 2/1/2012 Out of stock $ ...

4-Channel Co-Axial RC Helicopters - XHeli.com - RC ...
4CH CX Helicopters ... LIKE US BEFORE YOU GO FLYING! XHELI ON FACEBOOK. Get The Latest

Amazon.com: Hero RC H911 2.4GHZ iRocket 4 Channel Fixed ...
Hero RC H911 is a 100 class helicopter. It is a 4 channel fixed pitch helicopter providing true radio control helicopter flight performance. It is constructed with ...


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Editor's picks

  • WL Toys

    Hero RC H911 2.4GHZ iRocket 4 Channel Fixed Pitch Ready to Fly Helicopter w/ bonus Battery, Balance Bar, Main Blade, Connect Buckle, Tail Blade, USB Charger

    Toy (WL Toys)

    Rating (266 reviews):
    (4.1/5)
    WL Toys

    This little bird rocks!

    If you are looking for a quick and short answer, then I'd say YES, buy it. Now if you have time and want to know a little about my RC heli flying experience then read on. I started flying the RC heli with an indoor, toy-grade, 3/3.5-channel, infra-red (The sun light will interfere with infra-red), coaxial (2 sets of main rotor/blades) model. It's cheap, slow, and stable, but less responsive to the control, and the fact that it needs a 20~30 minute charging time for every 3~4 minutes of play is just a pain in you know what. After I became pretty good at it (Also tired of it), I got crazy. I moved up to a 450 class 6-channel collective pitch single rotor model, which was a huge mistake. It's like from playing with a harmless toy to an upside-down lawn mower! It was a money pit! Every crash (Usually happened in 10 seconds after take-off) would cost me at least $10~$20 for parts and lots of time trying to repair and adjust it myself. Stepping from a 3.5-channel model to a 6-channel one is... 5/5 gt507866 - See all my reviews Verified Purchase(What's this?) This review is from: Hero RC H911 2.4GHZ iRocket 4 Channel Fixed Pitch Ready to Fly Helicopter w/ bonus Battery, Balance Bar, Main Blade, Connect Buckle, Tail Blade, USB Charger (Toy) If you are looking for a quick and short answer, then I'd say YES, buy it. Now if you have time and want to know a little about my RC heli flying experience then read on. I started flying the RC heli with an indoor, toy-grade, 3/3.5-channel, infra-red (The sun light will interfere with infra-red), coaxial (2 sets of main rotor/blades) model. It's cheap, slow, and stable, but less responsive to the control, and the fact that it needs a 20~30 minute charging time for every 3~4 minutes of play is just a pain in you know what. After I became pretty good at it (Also tired of it), I got crazy. I moved up to a 450 class 6-channel collective pitch single rotor model, which was a huge mistake. It's like from playing with a harmless toy to an upside-down lawn mower! It was a money pit! Every crash (Usually happened in 10 seconds after take-off) would cost me at least $10~$20 for parts and lots of time trying to repair and adjust it myself. Stepping from a 3.5-channel model to a 6-channel one is... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , March 4, 2013

    Awesome Heli! A must buy over the standard V911!

    After reading some forums, there were nothing but rave reviews for the WL Toys V911 (a single bladed fixed pitch heli) as the next step from 3 ch coax helis....so I bought one. After receiving it I was literally wow'd by it's speed, agility and stability. It was as stable as a coax but could tear across the room with just a slight push of the stick. What an amazing heli! I've flown the V911 at least once a day for the last few weeks and am still amazed with it.After browsing Amazon one day, I came across the Hero RC H911 Warbird Edition (a rebranded and upgraded ver. of the V911). I liked the shark mouth canopy and already loved the V911 so I picked one of these up too! There are some very slight differences between the original V911 and the Hero H911 though. This model comes with larger 180 mAh batteries vs. the V911s 120-130 mAh batteries equating to longer flight time. This model also comes with a different, more aggressive swash plate. Because of it, I can get... 5/5 Johnnyrocket - See all my reviews Verified Purchase(What's this?) This review is from: Hero RC H911 2.4GHZ iRocket 4 Channel Fixed Pitch Ready to Fly Helicopter w/ bonus Battery, Balance Bar, Main Blade, Connect Buckle, Tail Blade, USB Charger (Toy) After reading some forums, there were nothing but rave reviews for the WL Toys V911 (a single bladed fixed pitch heli) as the next step from 3 ch coax helis....so I bought one. After receiving it I was literally wow'd by it's speed, agility and stability. It was as stable as a coax but could tear across the room with just a slight push of the stick. What an amazing heli! I've flown the V911 at least once a day for the last few weeks and am still amazed with it.After browsing Amazon one day, I came across the Hero RC H911 Warbird Edition (a rebranded and upgraded ver. of the V911). I liked the shark mouth canopy and already loved the V911 so I picked one of these up too! There are some very slight differences between the original V911 and the Hero H911 though. This model comes with larger 180 mAh batteries vs. the V911s 120-130 mAh batteries equating to longer flight time. This model also comes with a different, more aggressive swash plate. Because of it, I can get... Read more, January 11, 2013

    Great little heli for around the house!

    Like others have said, this is probably the best $45 dollars I've spent! I had a Swann Micro Lighting whose motor died after a crash that has been waiting to be replaced. The difference between these two helis is night and day. The Swann is way too tame by comparison being a coaxial and no aileron functions. The remote isn't half bad either with trim tabs for each channel, an lcd readout (although kinda cheesy), and a form of a dual-rate incorporated into the top button. The heli itself is attractive and practically unbreakable. I've crashed it numerous times, and the worst thing that has happened is that the canopy became dislodged. The gyro system is incredible at keeping the little bird's tail pointing in the same direction until you tell it otherwise with the controller. The tail will start to drift as the battery starts running low (Hint: it's a Lithium Polymer battery, stop flying it as this point and don't run it down anymore. Trust me, the battery will last much much longer)... 5/5 Matt S - See all my reviews Verified Purchase(What's this?) This review is from: Hero RC H911 2.4GHZ iRocket 4 Channel Fixed Pitch Ready to Fly Helicopter w/ bonus Battery, Balance Bar, Main Blade, Connect Buckle, Tail Blade, USB Charger (Toy) Like others have said, this is probably the best $45 dollars I've spent! I had a Swann Micro Lighting whose motor died after a crash that has been waiting to be replaced. The difference between these two helis is night and day. The Swann is way too tame by comparison being a coaxial and no aileron functions. The remote isn't half bad either with trim tabs for each channel, an lcd readout (although kinda cheesy), and a form of a dual-rate incorporated into the top button. The heli itself is attractive and practically unbreakable. I've crashed it numerous times, and the worst thing that has happened is that the canopy became dislodged. The gyro system is incredible at keeping the little bird's tail pointing in the same direction until you tell it otherwise with the controller. The tail will start to drift as the battery starts running low (Hint: it's a Lithium Polymer battery, stop flying it as this point and don't run it down anymore. Trust me, the battery will last much much longer)... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , December 2, 2013
    Servo Cyclic Control
    Indoor/Outdoor capability
    Dual Mode Operation
    Convenient Binding
    LCD Transmitter/Fine Tuning


  • Syma

    Syma F1 Armor 3 Channel RC Helicopter 2.4ghz w/ Gyro (Red)

    Toy (Syma)

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


  • Haktoys

    Haktoys HAK448 4 Channel 15" RC Helicopter, Gyroscope, Rechargeable, Ready to Fly, and with LED Lights - Colors May Vary

    Toy (Haktoys)

    Rating (68 reviews):
    (4.3/5)
    Haktoys

    It has great control and you can do just about anything you ...

    0 5/5 C. Walker (Iowa, USA) - See all my reviews, October 23, 2014

    Fathers Day In Afghanistan!

    0 4/5 Joe - See all my reviews This review is from: Haktoys HAK448 4 Channel 15" RC Helicopter, Gyroscope, Rechargeable, Ready to Fly, and with LED Lights - Colors May Vary (Toy) My wife bought this for me and had it sent to Afghanistan, as I am currently deployed there. We have had a lot of fun with it, everyone in the shop wants one now. In fact I have a few female Soldiers in my shop that are going to by one for their husbands who are stateside minding the home front.The only negative is because of strong winds and bad guys we can't fly it outside, so it has taken a beating and I am unable to locate repair parts for it. Still looking though. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , June 7, 2014

    Great performance for the price

    0 5/5 Saruhan - See all my reviews This review is from: Haktoys HAK448 4 Channel 15" RC Helicopter, Gyroscope, Rechargeable, Ready to Fly, and with LED Lights - Colors May Vary (Toy) Having purchased and played with many RC helicopters I found this one to give the highest price to performance ratio among double bladed helicopters. I would highly suggest purchasing this great toy. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , June 28, 2014
    List Price: $89.99
    Optimum charge time: 90 minutes, flight time: 7-10 minutes, flight range: up to 250 feet
    Stable flight & flexible materials with side propellers
    Built-in gyroscope for maximum stability
    Ready to fly right out of box, indoor/outdoor flight
    Withstands up to 5 mph breezes, spare parts available, great for beginners


  • Wltoys

    WLtoys Large V912 4CH Single Blade RC Remote Control Helicopter With Gyro RTF

    Toy (Wltoys)
    List Price: $169.99

    Control Distance: About 150m Flying Time: About 8 Minutes Charging Time: About 60 Minutes
    Frequency: 2.4GHz Channel: 4 Channels
    3D action & side flying Up, Down, Forward, Backward, Turn Right, Turn Left, Left Fly, Right Fly
    WLtoys V912 Helicopter


  • UTO

    UTO Drone U907 Huge Quad Copter 20.5 Inch 2.4Ghz 6 Axis Gyroscope Quadcopter Helicopter 4 Channel RC Plane Toys Ready to Fly Green

    Toy (UTO)
    List Price: $250.00
    Price: $99.99
    You Save: $150.01 (60%)

    Bright and colorful LED lights
    Charging Time is about 120 minutes while Flight Duration is about 7-9 minutes.
    20.5*20.5 inch super size makes it fly stably even under the strong wind
    Lightweight airframe, durable material, High quanlity battery and powerfull motors
    6 AXIS GYRO with posture control - Integrated design guarantee the precise positioning of the aircraft.


  • WL

    4CH 2.4GHz Mini Radio Single Propeller RC Helicopter Gyro V911 RTF White&Blue

    Toy (WL)
    List Price: $76.99
    Price: $25.23
    You Save: $51.76 (67%)


  • JXD

    JXD 4 Ch Indoor Infrared RC Gyroscope Helicopter "Drift King" - Colors May Vary

    Toy (JXD)


  • Top Race

    Top Race® TR-808 Mini 6 Channel 3D Stunt RC Helicopter RTF (Indoors/Outdoors)

    Toy (Top Race)

    Rating (27 reviews):
    (3.8/5)
    Top Race

    This is an awesome helicopter for the price

    0 5/5 Amazon Customer - See all my reviews Verified Purchase(What's this?) This review is from: Top Race® TR-808 Mini 6 Channel 3D Stunt RC Helicopter RTF (Indoors/Outdoors) (Toy) This is an awesome helicopter for the price. The rotator linkages are pretty easy to break and they don't seem to make parts for this heli. So I looked everywhere for parts that might fit and found that the helimax axe 100 cp linkages work great and I'm pretty sure that most of the other parts will fit too. I love this helicopter and would recommend it to anyone with some experience with 6 Channel choppers 0 Help other customers find the most helpful reviews  Was this review helpful to you? , August 5, 2014

    Great heli, the only thing was it took some ...

    0 5/5 DariusF - See all my reviews This review is from: Top Race® TR-808 Mini 6 Channel 3D Stunt RC Helicopter RTF (Indoors/Outdoors) (Toy) Great heli, the only thing was it took some time find where to get parts, i am posting this just as a help to anyone else who got this heli, http://www.rchelicopterparts.net/rc-helicopter-parts/parts-for-top-race-helicopter The parts come from China but they got to me in a week. Fun and very challenging therefore why i needed parts many many parts. have fun 0 Help other customers find the most helpful reviews  Was this review helpful to you? , April 24, 2015

    Awesome heli. Have not gotten good enough to do ...

    0 5/5 Brett Jacobsen - See all my reviews Verified Purchase(What's this?) This review is from: Top Race® TR-808 Mini 6 Channel 3D Stunt RC Helicopter RTF (Indoors/Outdoors) (Toy) Awesome heli. Have not gotten good enough to do 3d yet but great for learning 3d on helis. For a little chopper, this thing flies very stable and seems to handle bumps pretty well. The connector buckles will pop off on hard landings but that is what you want since it reduces likelihood of swashplate or blade damage. I reached out to Top Race and they will have parts available soon. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , January 5, 2015
    List Price: $189.00
    Price: $95.99
    You Save: $93.01 (49%)
    Durable Metal Design, automatic correction flight, Ready To Fly
    The Top Race TR-808 is the first mini Indoor/Outdoor 6 Channel Stunt RTF RC Helicopter
    Includes: TR-808 Helicopter, 2.4GHz Digital Transmitter, Spare Lipo Battery, USB, Charging hub, Spare Propellers & Tail Blade, Screw Driver, User Manual.
    Charging time: 60 mimutes, Flying time 8 Min. Distance more then 100 ft. Size: 29.5 * 5 * 7.5cm,
    Single propeller design, 3 -axis gyro , Flybarless balance, Electronic control system,


  • Syma

    Syma S107G 3.5 Channel RC Helicopter with Gyro, Blue

    Hobby (Syma)

    Rating (0 reviews):
    (4.2/5)
    Syma

    Great little toy

    Most of the other reviews have hit the major pros and cons with this, but there are still a few more that I can add. Hope they help in making your purchasing decisions!PRO:- Thanks to the gyro, very short learning curve. Remote has two joysticks. Left side only moves up/down and controls speed of the rotors, which controls how much lift they generate. Right joystick moves up/down (controlling forward/reverse) and left/right (makes heli spin). You can also moving the right stick diagonally to make various turns while moving forward or backwards (reverse "figure-8's" are always impressive).- Surprisingly large number of "mods" that can be done to a $30 heli. After experimenting, I have settled on two minor ones. First, I removed the spring from the left joystick in the controller. This lets me put the heli in a hover and let go of the remote ("look ma, no hands!"). I have also moved the landing gear forward in their mounts to push the center of... 4/5 RJ (NY, NY) - See all my reviews Most of the other reviews have hit the major pros and cons with this, but there are still a few more that I can add. Hope they help in making your purchasing decisions!PRO:- Thanks to the gyro, very short learning curve. Remote has two joysticks. Left side only moves up/down and controls speed of the rotors, which controls how much lift they generate. Right joystick moves up/down (controlling forward/reverse) and left/right (makes heli spin). You can also moving the right stick diagonally to make various turns while moving forward or backwards (reverse "figure-8's" are always impressive).- Surprisingly large number of "mods" that can be done to a $30 heli. After experimenting, I have settled on two minor ones. First, I removed the spring from the left joystick in the controller. This lets me put the heli in a hover and let go of the remote ("look ma, no hands!"). I have also moved the landing gear forward in their mounts to push the center of... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , December 24, 2010

    Very Cool RC Helicopter with GYRO- Great for Beginners

    Customer Video Review Length:: 0:19 MinsThis Syma S107G 3.5 Channel RC Helicopter with GYRO great for beginners, like myself. It has a sleek design made of metal and plastic. The helicopter we received is blue, white, black, and silver. It is an awesome price for as well as it works. We have bought others in store for twice the price and they did not work this well. It has a flight time of 7-10 minutes for every 50-60 minutes charged.It requires six AA batteries to power the controller. These batteries are not included. We are learning with this helicopter and it has taken quite the beating. I am literally surprised that we haven't broke it yet. I am very pleased with the quality. It has four blades and gyro that helps it stay steady in flight. It is fairly easy to control. The controller has two different joy sticks. One joy stick is for throttle and the other is to control. It also has a knob for trim. (Keeps the helicopter from spinning left to right when you fly it.) The... 5/5 Angela "MEB" (USA) - See all my reviews, August 2, 2015

    An unsung hero of the indoor RC helis - The Syma S107 (7.5 inches long)

    RATING: After flying the 7.5 inch Syma S107 indoor heli for about 3 months now, I have to say that it is one of the most under-rated RC heli out there, hands down. Shop around. At about $30 online with taxes and stuff, this little trooper delivers the looks, detail, durability and performance of a much pricier heli. The Syma S107 has only 3-way controls but it competes surprisingly well with the likes of the Blade MCX2 which has 4-way controls and retails for about $150 off-line.PERFORMANCE: I find it more fun to fly the Syma S107 than the smoother and more mellifluous Blade MCX2. In this sense the Syma S107 hews to a less is more principle: i.e. it delivers more with less. But here is the irony of the whole situation: the Syma S107's ragged performance edge actually connects with you better than the ultra-smooth Blade MCX2. It's almost like the difference between stick shift and automatic transmission. The S107's controls just feel more tactile than those of the Blade... 5/5 C. Rex - See all my reviews Verified Purchase(What's this?) RATING: After flying the 7.5 inch Syma S107 indoor heli for about 3 months now, I have to say that it is one of the most under-rated RC heli out there, hands down. Shop around. At about $30 online with taxes and stuff, this little trooper delivers the looks, detail, durability and performance of a much pricier heli. The Syma S107 has only 3-way controls but it competes surprisingly well with the likes of the Blade MCX2 which has 4-way controls and retails for about $150 off-line.PERFORMANCE: I find it more fun to fly the Syma S107 than the smoother and more mellifluous Blade MCX2. In this sense the Syma S107 hews to a less is more principle: i.e. it delivers more with less. But here is the irony of the whole situation: the Syma S107's ragged performance edge actually connects with you better than the ultra-smooth Blade MCX2. It's almost like the difference between stick shift and automatic transmission. The S107's controls just feel more tactile than those of the Blade... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , November 3, 2010
    List Price: $19.99
    Stabile Flight Characteristics
    Great for Beginners
    Battery Type: Lithium Polymer (LiPO Battery), batteries for remote control not included
    Easy to Fly
    Motor Type: Brushed
    S107 and S107G differ only in labeling. Either may be shipped.


  • SYMA TOYS INDUSTIAL CO.LTD

    SYMA X5C 4 Channel 2.4GHz RC Explorers Quad Copter Drone with Camera

    Hobby (SYMA TOYS INDUSTIAL CO.LTD)
    List Price: $63.99

    Stabile Flight Characteristics
    Great for Beginners
    Easy to Fly


Helicopters