The Abicana webstore
Mail: aquila_grande@yahoo.no
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The Abicana webstore
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Mail: aquila_grande@yahoo.no
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To read about the working principles of helicopters, please see further down
Radio controlled helicopter models and other hobby gear
Here is a presentation of some remote controlled model helicopters driven by batteries and electric motors and other hobby items, Also some good online stores of helicopter models and other hobby products are presented. In these stores you can browse for many more models than those presented at this page.
Please click at the links to read more or to make a purchase.
GREAT 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.
Dino Direct
- a general store with advanced products in many fields for reduced prizes - you
find many very advanced helicopter models here, among those also nitro driven
helicopters
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
Trend Times Toys - General hobby stores with helicopters and all other hobby gear
- This is a general hobby store with products for all age classes, but you will find a huge collection of hobby atricles for the youngest generation. Wireless models of helicopters, aircrafts, cars and boats. Electronic sets, telescopes, computers and a lot more. Models in all size and prize cathegories. 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
The exhibited models are fetched from the above presented shops and some few other good shops. By clicking at any product link you will enter the whole shops and see many mor rc models of various kind.
Helicopter models mith two contrarotating rotors over each over for maintaining stability
Small helicopters suited for indoor use
Easy to use but advanced helicopters for beginners
4 channel chinook military transport helicopter
4-channel Apache RC model helicopter with counterrotating rotorblades
4-channel Eurocopter EC-120 remote controle model helicopter with contrarotating rotor blades
Remote controle Eurocopter EC-135 4 Channal helicopter model with contrarotating rotor blades
Advanced RC helicopter with classic design and stabilizing gyro blades
6-channel helicopters for experienced users.
Advanced nitro driven helicopters
Spy-camera to mount on RC models of airplanes, helicoptesr and cars
REMOTE CONTROL CARS
HobbyTrons car collection - Please click on this product link to see more about the exhibited product or other models.
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.
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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.
LINKS TO OTHER PRODUCT PRESENTATIONS
Skincare, beauty, anti-aging and hot fashion
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.