The Mydeltapi Webstore - rc models of cars, trucks and construction machines
Remote controle model cars and construction machines, also electric scooters
Welcome to this online store of remote radio control model road and offroad vehicles. By clicking at the link of a presented model, you can learn more about the selected model, you can buy the model, or you can find a lot of more models to learn about or buy.
Good online warehouses for model cars
Electric model cars formed as replicas of famous street car
Electric trucks, buggies and truggies made for though driving
Electric models of construction mashines and special duty cars
Electric scooters for kids to ride on
Nitro driven model replica cars
Nitro driven high duty truggies, buggies and trucks for racing or offroad use
Links to other types of hobby and technical products
About model vehicle motor and power technology
Good online warehouses for rc model cars
Store with good offers on
hobby items and consumer electronics - and also many RC car models
- In addition to all kind of electronics you will
also find a fine collection of hobby products you will find a lot of remote controle hobby
aircraft models for an affordable prize. Most models are electric driven but there are also some nitro
models. You will also find many other types
of hobby items.
Great general hobby stores that include helicopters, airplanes, boats rc cars
and much more - Items for all age generations
- In these two collections of hobby products you will find a lot of remote controle hobby
car models for an
affordable prize. Most models are electric driven. You will also find all other types
of hobby items.
Among other things high power redcat racing models and redcat equipment. Nitro driven redcats: 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.
Electric RC replica cars
Electric trucks, buggies and truggies made for though driving
Electric RC construction vehicles
Electric scooters to ride on
Nitro driven replica cars
Nitro driven RC truggies, buggies and trucks for high performance
Please click here to see more RC car models
Links to pages with other types of products
Back to main menu of all hobby and professional products
Advanced helicopter models and drones
Exhibition of fast-winged aircrafts and some helicopters and drones
Advanced fast-winged aircrafts
An exhibition of helicopter models
Advanced helicopter models
An exhibition of drones
RC model boats
More RC model boats
RC redcat models
RC car information
The working principles of an airplane
Motor Technologies for RC aircrafts and vehicles - please scroll down
About remote controle transmitters and resceivers
About RC helicopters
About helicopter history
Battery technology for RC vehicle models - please see below
CAR EQUIPMENT - Comodities, spare parts and tools for your car
Good stores for car eqyipment
- By clicking at the banners below,
you will find all types of car equipment and repair parts for your car. You will
also find any type of accessories to increase the performance of your car or to
style up the exterior or interior of the car in your own fashion. There are also
any type of auto electronics, like: Auto radio / stereo / music, communication
electronics, security equipment, nevigation equipmen and more. Here are
presented three good stores of car equipment. They all have all types of
equipment, but are strongest in the fields indicated. All the tree shops have
great stocks of performance parts.
This store has big collections of tools for garage work and grooming and for all things that make your driving and journey comfortable:
This store has a great stock of core mechanical part for the motor, suspension, air intake, exhaust system, transmission system, electric supply and stearings system:
INFORMATION ABOUT VEHICLES
TECHNOLOGY - Especially RC vehicles
Here are explained some terms regarding motors used in RC aircrafts, cars and boats.
Electric motors: Electric motors are steadily taking over as the driving force for hobby helicopters, airplanes, cars and boats, due to advancement in battery technology. It has since long been possible to make small electric motors with a high effect output. The problems has been shortment of battery performance. It has been difficult to make small batteries that can deliver a high enough effect to drive an aircraft or a high performance car or boat. It has also been difficult to make small batteries that store enough energy for a high effect output during a long enough time to be practically useful. However, this situation has changed with the emergence of small high performance batteries of the technology types Nicle-cadmium (NiCd), Nicle - metalhydride (Nimh) and Lithium - polymer (Lipo).
There are many types of electic motors. Since batteries deliver direct current (DC), these electric motors are DC-motors. The cheapest motors used for hobby vehicles use magnets made of common ferrite (an iron variant). More expensive types with higher performance use magnets made of a cobalt-samarium alloy delivering a bigger magnetic force.
Two-stroke piston engines: A two stroke engine is a piston engine operating in this way: When the piston is near the bottom after the explotion, the eshaust after the combustion is let out, or blown out, and a new blending of air and fuel is rapidly forced in. On the way up, the blending is compressed. At the top the blending is ignited, and then the piston is pressed down again. The way of achieving this rapid refill of air-fuel-blending differs from construction to construction.
The classical way of doing it, is like this: The blending of air and fuel is sucked into the room under the cylinder when it is near the top by the under-pressure the cylinder makes in this room.. This is done through an inlet at the lower part of the cylinder that the cylinder closes when it is not near the top. When the piston is at the bottom, the blending is under high pressure from the cylinder. Another inlet from the room under the cylinder into the cylinder higher up is however by now free, and so is also an exhaust outlet. The air-fuel blending expands into the cylinder and presses the exhaust out. When the cylinder goes up again this second inlet and the exhaus outlet is covered by the cylinder, and the gas inside the cylinder is trapped and can be compressed.
Four-stroke piston engines: A four stroke engine operates with such a cycle: Beginning with the piston on top with a compressed air-fuel-blending, the blending is ignited and burns rapidly making a great pressure.The pressure presses the piston down. When going up again the piston presses the exhaust out. When going down the second time, the piston sucks in a new blending of air and fuel. When going up the second time, the piston compresses the new blending. Then new ignition can take place and the cycle repeates.The inlet of air and fuel and outlet of exhaust is in a classical construction controlled by valves that open and close.
Glow-plug-motors. This is a piston motor that uses a permanently glowing object in the top to ignite the fuel. The object is warmed up by sending electricity through it before the motor is started. Glow-plug motors are typically two-stroke, and they mostly use nitro-methane as fuel. Formerly methanole was much used in glow-plug motors. Most piston engines for model airplanes are glow plug motors.
Diesel motors: A diesel motor is a piston motor that igites the fuel by first pressing fresh air so hard together that it results in the ignition temperature and then by ingecting the fuel into the hot air. The fuel then detonates. Detonation is a combustion where all parts of some blending ignites at exactly the same time.
This kind of motor is suited for using slowly burning fuel. A diesel motor typically uses diesel as a fuel, but can use other types of slowly burning fuel as well. A diesel motor can be two-stroke or four stroke.
Jet motors: Basicly a jet motor consists of a tube that has a larger hole at the back end than in the fromt end. Inside the tube, there is a rapid combustion of some fuel that gives a high pressure. The front end hole is used to supply air, and the exhaust goes out through the back end hole. Because the hole in.the front is smaller, than the back end hole, the pressure will have more to press on in the front end than in the back, and this pushes the motor foreward. Jet motors differ by the way air is supplied to the inside. There are types like ram-jet, pulsating jet or turbo-jet. Turbo-jet is the only type used in remote controle vehicles.
Turbojet motors: This jet motor type is the classical jet type, and this is the type used in hobby jet planes. In a turbujet motor, there is a pivot going through the tube form the front to the back. In the front there is a system of small fans that pushes air inside. At the other ende after the combustion, there is a larger fan system driving the pivot around, and thus also driving the fan system in the front.
Pulsating jet: A pulsating jet consists basically of a tube where the back outlet is of greater area that the front inlet. At the front inlet there is mounted a grid that is automatically opened and closed. Every time it opens, air is let in and exhaust is pushed out from the tube. When it is closed, fuel is quickly injected and the blending of fuel and air is igneted. The pressure from the explosion has more material to push at in the front porsion of the tube than at the back because the tube narrows towards the front end. Therefore the motor and the airplane is pushed foreward. Pulsating jets are hardly ever used in model vehicles. It has been used in some special militæry missiles. It may be used in the possibly existing secret high speed and high altitude espionage aircraft popularily named Aurora, since possible observations of that aircraft include a pattern of noise from narrowly spaced explotions and a pattern of smoke rings or smoke balls let out within short intervals.
Ramjet: This is the most simple jet engine. It consists only of a tube where the front end inlet is narrower than the back end outlet. As the airplane moves foreward, the pressure from the air approaching the motor presses air into the front hole. Inside the tube, fuel is injected and the blending of fuel an air is burned. The pressure inside the burning blending has more material to push at in the front porsion of the tube than at the back because the tube narrows towards the fron end. Therefore the motor and the airplane is pushed foreward. A ramjet only work at high speeds, because the speed must be so high that the pressure from the air approaching the motor must exceed the pressure that is made only by the burning blending of air and fuel. Ramjets has perhaps only been used experimentally. It may be used in the possibly existing secret high speed and high altitude espionage aircraft popularily tamed Aurora. The motors of this aircraft are perhaps designed to be used as pulsating jet at lower speed, and as ramjet at the highest speed. To start the aircraft, the motors are perhaps used as rocket engines utilizing a small amount of stored oxygen to be blended with the fuel. Ramjets are never used in model aircrafts.
Electric fan-jet motors or ducted fan motors:These motors have an inlet for air and an outlet, and they look like a turbojet motor from the outside. Inside there is a fan that pumps the air through the motor and creates the pressure that drives the aircraft foreward. The fan is driven by an electric motor or by some arrangement working as an electric motor. For example can the fan be constructed so it works as an electric motor anchor and static electric magnets can be integrated in the duct around the fan.
Turbine motors: A turbine motor is built like a turbo-jet motor, but the back end fan is so great that the pressure exerts a greater power than that necessary to drive the compressor around. This power can be used to drive propellar, the wheels of a vehicle or anything else. The shaft and fan of a turbine motor must rotate with a much higher speed than a propellar or wheel that the motor drives. Therefore there must be some gearbox between the motor and the mashinery driven by the motor to transform down the speed of rotation.
Turboprop-motor: A turboprop motor is simply a turbine motor used to drive a propellar of a fast-winged aircraft, or the rotor of a helicopter.
Rocket motors: A rocket motor is simply a cylinder open in the back end. In the cylinder are placed fuel pellets that are ignited by means of a wick fuce. The pellet contain both some combustable material and some material that gives out oxygen for the combustion when heated. The rocjet engine only burns of a short time. It is sometimes used in glider planes to make the glider lift into the air from the ground.
Nitro driven motors and nitro-methane:
A nitro motor is fueled by the chemical compound nitromethane. A nitro driven motor can be any of the allready listed motor types, perhaps except diesel motors. Nitromethane has the formula CH3-NO2, or written more correctly: CH3-N=O(-O).
Nitromethanne has several properties makeing it suited for hobby vehicle powering. First of all, the molecule has inside oxygen atoms that can be used during the combustion process. Therefore very little air is needed in the cylinders or in the combustion chambers during operation. Each piston stroke or turbine round will therefore contain 8 times more fuel than a hydrocarbone based fuel, and greater effect is delivered. The burning process with the optimal amount of oxygen added is:
4CH3NO2 + 3O2 → 4CO2 + 6H2O + 2N2
Because of the inner oxygen content, the fuel can even burn without oxygen. In this case, the process goes like this:
4CH3NO2 → 4CO + 4H2O + 2H2 + 2N2
The fuel combusts very rapidly, making it very suitable for high speed engines (having a high number of rounds or piston strokes per time unit).
The fuel has a tendency to pre-ignite and detonate in the cylinder if the oxygen content is high, which will counter-act a good motor action. Therefore a oxygen-poor blending is usually used, so that a mixture of the two combustion processes normally occur.
Nitomethane has a high heat capacity. This makes it a good as a cooling medium for the motor mechanics and cylinders. Using nitromethane as a fuel, and letting the fuel cool the motor, eliminate the need for advanced cooling mechanisms.
Being able to burn without oxygen supply, means that nitromethane also is an explosive. It is however difficult to make it explode without using very special arrangements. It is safe against normal handling and under the conditions during use as a motor fuel. It should however be stored under the usual precautions of a high flammable compound, in so small quantities and in such a place that an explotion does not exert serious damage.
Methanol is the simplest type of alcohol. It has the chemical formula CH3OH. It burns according to this process:
2 CH3OH + 3 O2 → 2CO2 + 4H2O
Since the fuel needs more oxygen to burn than nitromethane, methanol is less effective than nithro-methane. Methanol is also very toxic, and must be handled with care both as a toxic substance and as a flammable compound. This fuel was formerly much used for glow-plug motors, but it is by now mostly replaced by nitromethane.