Hovercraft
A hovercraft (or "air cushion vehicle") is a machine that "hovers" on a cushion of air above the surface it is traveling over.Hovercraft is a craft which is capable of travelling any surface like land ,mud, water, ice etc.
BLDC :-
The Brushless DC (BLDC) motor is the ideal choice for applications that require high reliability, high efficiency, and high power-to-volume ratio. Generally speaking, a BLDC motor is considered to be a high performance motor that is capable of providing large amounts of torque over a vast speed range. BLDC motors are a derivative of the most commonly used DC motor, the brushed DC motor, and they share the same torque and speed performance curve characteristics. The major difference between the two is the use of brushes. BLDC motors do not have brushes (hence the name "brushless DC") and must be electronically commutated.
Advantage:-
- A BLDC motor can operate at speeds above 1000 Kv under loaded and unloaded conditions.
- Inner rotor Brushless DC motors have low rotor inertia, allowing them to accelerate, decelerate, and reverse direction quickly.
- BLDC motors have the highest running torque per cubic inch of any DC motor.
Propeller :-
- A well-designed propeller typically has an efficiency of around 80% when operating in the best regime. The efficiency of the propeller is influenced by the angle of attack (α). This is defined as α = Φ - θ where θ is the helix angle (the angle between the resultant relative velocity and the blade rotation direction) and Φ is the blade pitch angle.
- Increasing the prop’s pitch or length will cause a higher amp draw.
- Decreasing the prop’s pitch or length is the easiest way to solve a heat problem with the motor.
- Low pitch numbers tell you it’s a torque prop. With this type of prop, the motor generally does not work as hard so it pulls fewer amps. If you want to do a lot of stunts, a torque prop has a lot more acceleration, and the power system will rarely need any heat management.
- High pitch numbers tell you it’s a speed prop. This type of prop will push your plane to faster speeds. This is not your best choice for stunts. A speed prop has a lot less acceleration, and the motor will run hotter.
The first number is the length of the propeller and the second number is the pitch. Higher the pitch, faster your hovercraft will go. Propeller pitch is a theoretical value but it give you an idea to select right propeller. The given image below to make you understand what propeller pitch actually does…
We can see that higher pitch propeller faster than low pitch propeller.
ESC(electronic speed controller) :- It controls the speed of the motor .
Selection of right component:-Selection of motor, propeller, esc and battery related to etch other and depend upon the size of the hovercraft (i.e. load or weight of the hovercraft).
Let us take a 1000KV/25A motor so we have to choose esc not less than 25A and not a larger value. There are 30A esc, sufficient to derive the motor. Propeller can be choose according to the above information otherwise propeller specification given in the motor datasheet.
connection diagram:-
images:-
video:-
Other link:-
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