How helicopters work. Advanced remote control helicopter models

The Abicana webstore

Mail: aquila_grande@yahoo.no

To find RC models of helicopters, other RC models and other cool products, please see further down

The working principles of helicopters

Here is an article about helicopter working principles. Further down you find a presentation of some model planes using electric motors and other hobby items, including remote control hobby helicopters.

THE WORKING PRINCIPLES OF HELICOPTERS

The hobby helicopters presnted above are operated by the same mechanical and aerodynamilcal prinsiples as a full scale helicopter.

Helicopter lift is obtained by means of one or more power driven horizontal propellers which called Main Rotor. When the main rotor of helicopter turns it produces lift and reaction torque. Reaction torque tends to make helicopter spin. On most helicopters, a small rotor near the tail which called tail rotor compensates for this torque. On twin rotor helicopter the rotors rotate in opposite directions, their reactions cancel each other, the same is through about the four-rotor hobby helicopters depicted above.

Main rotor

The main rotor produces the lifting force. Each blade produces an equal share of the lifting force so that the weight of a helicopter is divided evenly between the rotor blades. If the helicopter also accelerates up, the rotor also has to provide for the force needed for acceleration. Furthermore it has to provide the force to overcome air resistence towards the helicopter due to upward motion.

Tail rotor

The spin of the main rotor will make a force on the rest of the helicopter that brings it to spinning in the opposite direction if something does not counteract this spinning. This is called torque reaction. The tail rotor compensates for this torque thus holding the helicopter straight. On twin-rotors helicopter or the four rotor hobby helicopters, the rotors spin in opposite directions, canceling out this reaction. The tail rotor in normally linked to the main rotor via a system of driveshafts and gearboxes , that means if the main rotor makes one turn , the tail rotor is also turn a definite number of times. Most helicopter have the tail rotor turn 3 or 6 times for each turn of the main rotor.

Lifting dissymmetry

All rotor is allways experiencing Dissymmetry of Lift in forward flight . As the helicopter gain air speed , the advanceing blade develops greater lift because of the increased airspeed and the retreating blade will produce less lift , causing the helicopter to roll. This has to be compensated for in some way . The compensation is mostly effectuated passively by blade flapping. Increased airspeed and lift on the advancing blade will cause the blade to flap up and decreasing the angle of attack . The decreased lift on the retreating blade will cause the blade to flap down and increasing the angle of attack . This combination equalizes the lift over the two halves of the rotor disc.

Regulating the force of the main or tail rotor.

This is usually done on a real helicopter by regulating the angle of the rotor blades without changing the speed of the rotors, thus giving the rotors more or less power. At the same time the force of the motor must be regulated up or down by adding or decreasing the gas given. In a hobby helicopter the force may be regulated by changeng the speed of the rotors because the mechanical system used here is simpler.

Regulating the flying direction for the helicopter

A helicopter can hover still in the air, fly forewords, backwords or sidewords. This is done by tilting the helicopter main rotor so that a component of the force from the rotor points in the wanted flying direction. The vertical force component of course still is used to make the helicopter hover. The force used by the motor must also be regulated so that it deliveres enough force both for the horisontal component and the vertical component.

The mechanical regulation of the rotor blade angles and tilting.

This is done by the folowing mechanism in a real helicopter.

Swash Plate Assembly : The swash plate assembly consists of two primary elements through which the rotor mast passes, one of which is a disc, linked to the cyclic pitch control. This disc can of tilt in any direction but does not rotate as the rotor rotates. This non-rotating disc is attached by a bearing surface to a second disc, often refered to as the which turns with rotor and linked to the rotor blade pitch horns.

The Collective Control : When pilot raises the collective control or pull collective control up , the collective control will raises the entire swash plate assembly as a unit . This has effect to the blades by changing the angle of all blades simultaneously.This causes to increase angle of attack and give more lift.

The Cyclic Control : The pilot has a so-called cyclic control stick at his disposal. The cyclic control will push one side of the swashplate assembly up or down, so that the rotor will be angled in the desired direction. This causes the helicopter to move left or right, forward or backward.

In a hobby helicopter, the remote control system is usually more authomatic, freeing the pilot from thinking about blade angles or tilting. He only has to decide if he will move up or down, in what direction and at what speed.

Online hobby equipment store

Welcome to this online store for hobby articles. Buying hobby equipment online, you can get it for a better prize than from your local stores. Often you can also find items or product variants you do not find locally.

At this page collections of advanced remote controle model helicopters are presented and some of the models are exhibited. You can also find other types of RC models and other hobby items. Please click at the links to read more or buy.

ONLINE STORES WITH HELICOPTER MODELS

A huge store of helicopter models and helicopter accessories - In this store there are all cathegories of remote controle helicopter models. There are simple helicopters that are easy fo fly for a smalll child. There are models of medium sophistication. You also find advanced RC helicopters made for acrobatic flights or flights high up and far away. You can also find all kinds of spare parts and equipments for helicopter models. You can for example find remote controle digital camera equipment to install on the helicopter. There are also a lot of basic modules you can combine to put together your own helicopter as you like it to be.

Xenonproject.com - Large store of remote controle models - In this store you can find nitro and electric helicopters and all other types of RC models.

NitroModels.inc - This is a very great collection of nitro diven helicopters and airplane models. Also electric models.

General hobby stores with helicopters and all other things - Wireless models of helicopters, aircrafts, cars and boats. Electronic sets, telescopes, computers and a lot more. Models in all size and prize cathegories, and suitable for all ages. Electric driven models that are suitable for indoor and outdoor use, and extreme speedy gas driven models for the advanced modeller.

EXAMPLES OF HELICOPTER AND AIRPLANE MODELS

6-channel RC helicopter for expert pilots with counter-rotating rotor blades

Most Stable 6-Channel Heli! Exceed-RC G2-V2 6-Channel Type Z400 Belt-Driven Electric RC Radio Remote Control Helicopter Ready to Fly w/ LiPoly Battery

Exceed G2 Version 2 Exceed RC 3D aerobatic capable 400 class size RC electric 6 channel 3D RTF helicopter, the Exceed-RC G2! READY TO FLY! The Exceed-RC G2 is ready to fly out of the box within minutes. Everything needed to fly is included and installed such as a battery pack, motor, electronic and a 6 channel 72Mhz FM radio system. All that is needed are 8 "AA" batteries for the transmitter. Plus, each Exceed-RC G2 is test-flown at the factory to ensure precise performance and control which makes it truly ready to fly right from the box. Exceed-RC G2 SE - 3D Inverted Flight with tic tocs+lawn mower (Requires Upgrade Package Brushless Motor+25A ESC+LiPo 11.1V 1800mAH- On Sale $74.95 Now) We are also proud to offer this magnificent model as 3D capable right out of the box. Combining the knowledge of RC nitro collective precision along with the most advanced micro electric design concepts, we have arrived at a model that excels prepared to wipe out the competition. The Exceed-RC G2 Type 400 (Now in Version 2) offers collective pitch control that will let helicopter pilots to fly in almost any direction. Transitioning from forward flight to hover with smooth, solid control is a cinch and negative pitch is a breeze for aerobatics like loops and rolls.

4-channel Apache RC model helicopter with counterrotating rotorblades

Newest 2009 4-Channel Colco Desert Apache AH-64 Military RC Helicopter Version 3 100% Ready to Fly!!

This is the newest 2009 version of the 4CH Colco Apache V3 with improvements. This Apache is a beginner-friendly helicopter that are also liked by experienced flyers. Its unique design makes it easy to configure, control, and more fun to fly. It is designed to both train pilots and entertain them by delivering a stable flying platform capable of controlled indoor and outdoor flight. The Apache has two sets of main rotors and a freewheeling tail rotor that does not affect flight. The counter-rotating main rotors eliminate the need for tail rotor compensation because they move in opposite directions, canceling each other’s rotational torque . In addition, the blade sets give it an added bit of gyroscopic stability, which allows mere mortals to hover it with prowess. The lower rotor provides cyclic control for the heli. To yaw the helicopter (left and right), one of the main rotors either slows down or speeds up to create an imbalance in torque. This results in the Apache turning in the direction opposite to the rotation of the faster moving rotor. Since the Apache is fixed pitch, collective control is governed exclusively by throttle.

4-channel Eurocopter EC-120 remote controle model helicopter with contrarotating rotor blades

The New EC-120 Eurocopter Electric 4 Channel Double Counter Rotation Helicopter

This is the brand new 4 CH EC-120 Twin-Rotor-Coaxial helicopter. This helicopter is one of the newest dual-rotor in the market. The Twin-Rotor-Coaxial-Twin-Rotor design the helicopter has extreme stability in taking off and easily control by any beginner pilots. The CH EC-120 is a beginner-friendly rc helicopter enjoyed by inexperienced/experienced flyers. Its unique design makes it easy to configure, control, and more fun to fly. It is designed to train pilots and entertain them by delivering a stable flying platform capable of controlled indoor and outdoor flight course . The CH EC-120 has two sets of main rotors and a freewheeling tail rotor that does not affect flight. The counter-rotating main rotors eliminate the need for tail rotor compensation because they move in opposite directions, canceling each other’s rotational torque . In addition, the blade sets give it an added bit of gyroscopic stability, which allows mere mortals to hover it with prowess. The lower rotor provides cyclic control for the heli. To yaw the helicopter (left and right), one of the main rotors either slows down or speeds up to create an imbalance in torque. This results in the CH EC-120 turning in the direction opposite to the rotation of the faster moving rotor. Since the CH EC-120 is fixed pitch, collective control is governed exclusively by throttle. On the CH EC-120, the roll cyclic is a bit more responsive than its pitch cyclic (fore/aft control). This is because the very small range of cyclic control can more easily roll the heli than it can pitch it along the length of the body.

Advanced RC helicopter with classic design and stabilizing gyro blades

TransPro V2 EXI 450-ZL Super Edition RC Helicopter Kit 90% Assembled w/ Tons of Hot CNC Upgrades!!!! The Latest in Radio Control RC Helicopters

h1 { font-family: Arial, Helvetica, sans-serif; font-size: 16px; font-weight: bold; color: #ffffff; margin:1px; line-height: 14px} --> Pro Version EXI 450ZL ARF Electric Mini Heli More Stuffs for Pro Version EXI 450ZL Alpha 400 (3500kv) Outrunner Brushless Motor $26.95 11.1V 1300mAh 15C "Exceed RC Fusion Power Series" High Performance Lithium Polymer Battery $24.95 Upgrade Package (ESC+Battery+Brushless Motor) Key Features Extreme 3D capability right out of the box 95% factory-assembled Direct-to-swash CCPM linkages Carbon fiber frames Aluminum and composite swashplate Tail servo boom mount Stainless steel tail rotor hub 325mm PRO symmetrical plastic main blades Belt-driven tail rotor Auto-rotation system Gun-metal gray aluminum head block Gun-metal gray aluminum skids and tail boom Overview The Pro Version EXI 450ZL uses a combination of tough, lightweight aluminum and carbon fiber and is designed and equipped to be capable of the most extreme 3D maneuvers right out of the box. And since it’s 95% assembled, you can have it flying in just a few hours. Specs Main Rotor Diameter:27.6 in (700mm) Tail Rotor Diameter:5.9 in (150mm) Gross Weight:22?4 oz (620?80 g) Length:25.6 in (650mm) Kit/ARF May we suggest the following recommendations for the Pro Version EXI 450ZL: Alpha 400 (3500kv) Outrunner Brushless Motor $26.95 11.1V 1300mAh 15C "Exceed RC Fusion Power Series" High Performance Lithium Polymer Battery $24.95

Advanced, but easy to fly RC helicopter with stabilizing gyro blades

Exceed-RC G2 RC Helicopter * Brushless CNC Premium Edition * Radio Remote Controlled RC Helicopter * 100% Ready-to-Fly *

This is a fully loaded G2 Premium Edition (G2 PE) radio control helicopter. The G2 PE is a great 3D helicopter 100% Ready to Fly with CNC Aluminum parts, brushless motors and lipo battery suitable for Beginner to Advanced Pilots. The helicopter is test flown and trimmed by the factory, ready to go out of the box. fiber glass main blades, Head Lock Gyro, brushless motor and 11.1V Li-Po battery, Li-Po balance charger and pre-setup transmitter make the helicopter an excellent machine for beginners and even for very first time helicopter flying. The G2 PE with collective pitch function and Hi-power brushless motor can make great Aerobatic-Flying. A PC simulator cable to connect your radio to your PC is also included to make a perfect package for all kind of flyers and you get all for an amazing low price.

Remote controle Eurocopter EC-135 4 Channal helicopter model with contrarotating rotor blades

The New 19" 2.4Ghz Art-Tech EC-135 4 Channel Eurocopter Helicopter Fully Loaded w/ LiPo Battery 100% RTF

The EC135 can trace its history back to before the formation of Eurocopter. It was started as the BO 108 by MBB of Germany in the mid-eighties. A technology demonstrator ('V1') flew for the first time on 17 October 1988, powered by two Allison 250-C20R/1 engines. Now XHeli.com is proud to present you a 2.4Ghz model type radio control helicopter of the EC-135 by Art-Tech. Roughly the same size as Esky's Big Lama, it is one of the few true beginner's helicopter that can be flown both indoor and outdoor. Powered by two 370 motors, the EC-135 has great power against the wind. Any beginners helicopter pilot will be amazed at how easy it is to fly this chopper. The EC-135 is included with everything that is required to fly (less the 8-AA transmitter batteries). It comes assembled right out of the box so all you need to do is charge the lipo battery and you're set to go! Flies about 8-10 minutes each charge. Bonus includes a FREE replacement set of main rotor blades! For beginners, flying the Art-Tech EC135 out of ground effect (first few inches off the ground) is not difficult either. Unlike other micros, the Art-Tech EC135 tends to rise evenly rather than skate across the floor laterally. If you punch the throttle, it has no hesitation in climb either.

Blade runner Remote control helicopter with two contararotating rotors

Dark Knight 3-D CP SRC 6-CH helicopters.

Electric remote controle classic airplane

REMOTE CONTROL CARS

HobbyTrons car collection - Please click on this product link to see more about the exhibited product or other models.

Whisker Top Speed Racer RC Electric Car

This high speed Whisker Top Speed Racer RC Electric Car comes with a rechargeable battery and charger. This Whisker Top Speed Racer RC Electric Car comes ready to race right out of the box! This baby is sweet and super fast, and can reach very high speeds. You also get a uniquely designed LCD transmitter.

Nitro and electric driven redcats: Examples: Hurricane XP PRO, Monsoon XP, Avalamche XP, Tornado BP, Tsunami, Tsunami ultrawide, Volcano SV SV Pro, Tremor ATV XTB XtG XTK XTR. Electric redcats: Lightning XTK, Tornado EPX, Tsunami EPX, Volcano EPXr.

High performance rc model cars: This is a general collection of high performance RC cars, especially nitro-driven cars.

.

HAVE FUN DESIGNING YOUR OWN CLOTHES - and get them sent to you as you have designed them

Create your T-shirts, underwear, sportswear and other clothes as you want them yourself with SpreadShirt designer - By clicking at the banners here, you will find a flash-based tool that you can use to design your own clothes. You can give them the background colors and patterns you want, choose drawings and place them where you want on the clothes, and create texts to place on strategic sites on the clothes. You can then purchase the clothes of your own design and get them sent to you within 48 hours.

If you live in America, please click at this banner.

If your home is in UK, please click here.

PARTS AND EQUIPMENT FOR YOUR CAR HOBBY

Here are tree online shops with affordable parts and equipment for your car. All shops have much of the same equipment, but the titles over the banner, indicates what area each shop is best at.

Technical parts for repair and performance

Internal and external equipment and comodities, car electronics and GPS navigation

Comodities to take with you on your journey, car electronics, workshop tools.

Books reading materials and elecronic media about cars and other motor vehicles - By clicking at this banner you will find a grat range of books, calendars, manuals, videos and collectibles about: Modern and classic cars, auto racing, motorcycles, trucks, tractors, trains, boats, aviation, military history, bicycles, americana, and collectibles.

CAMERAS, BINOCULARS, NIGHT VISION DEVICES, TELESCOPES, OPTICS

Here are two examples of optical devices. Through the product links you can find whole collections of telescopes, binoculars, night vision devices and microscopes.

Quest 5 Binocular Night Vision Device from Night Detective®

Although compact and lightweight, Night Detective® BQ 5 is a powerful Night Vision binocular featuring 5x optical magnification and two carefully calibrated Generation 1 Image Intensifier Tubes. Efficient circuit design delivers extended operational times from a single battery source. Multicoated all-glass lenses enhance the sharpness of the image and reduce glare. Modern design combined with technological excellence makes ND BQ5 essential unit for any situation that involves nighttime observations. Infrared illuminator is built in to allow operation in complete darkness. Perfect for campers, hunters, detectives, police officers, surveillance work and much more. Two premium quality Generation 1 Image Intensifier Tubes 5x image magnification Multicoated lenses for higher precision Built-in Infrared illuminator Efficient circuit design Comes in its own protective shoulder bag for comfortable transportation Technical Specifications: Generation: 1 Magnification: 5x Range of View(feet): 675 Power Supply: 3v lithium (not included) Weight (lbs): 2.7 Dimensions (in): 7 x 6.4 x 2.4 Focal Length (in): 3.15 Aperture: 1/1.7 Focusing Range ( feet ): 12'-infinity According to the manufacturer, this first generation item typically uses an S-20 photo cathode (with photosensitivity of 180 - 200 mA/Im), electrostatic inversion, and electron acceleration to achieve gain. Consequently, Gen I was the first passive image intensifier. Gen I is characterized by geometric distortion, weak performance at low light levels, and blooming. Expected lifespan is 1500 hours.

LINKS TO OTHER PRODUCT PRESENTATIONS

Music instruments - guitars, keyboards, violins, brasswind instruments, woodwind instruments, drum sets and more

Electronics - computers, PDAs, cellphones, electronic hobby kits, electronic components, software, internet products

Skincare items: Products targeted against any type of medical skin problem: Whiteheads, blackheads, pimples, eczema, irritation, inflammation, skin hurt by the sun, cellulites, wrincles, miscolored skin, and more.

Please click here to see the products

Products to help against many common diseases: Items based on herbs, vitamins, minerals and anti-oxydants targeted at specific health problems. By clicking this link, you will se a menu where you can choose the names of specific diseases or health problems. Then you will get a presentation of the product for the purpose of helping against that exact problem. You find products for skin conditions, heart and circulation, problems with nose, throut and lungs, muscular and joint conditions, difficulties with the digestive functions, hormonal imbalances, nervous and mental symptoms, hormonal problems like slow thyroid production, urinary and reproductive organs, and more.

Pleace click here to find the right product