Hexa-copter

What is the Hexa-copter?
 A Hexa-copter is a multi-rotor aircraft that uses six motors and propellers, Hexa-copter is unlike a helicopter that rises on a single column of air, the Hexa-copter rises on sex columns of air making it more stable than other multi-rotors like tri-copter, quad-copter.

Octa-Copter

What is the Octa-copter?

 An Octa-copter is a multirotor aircraft that uses eight motors and propellers,Octa-copter is unlike a helicopter that rises on a single column of air, the Octa-copter rises
on eight columns of air making it more stable than other multirotors like tri-copter,quad-copter and also hexa-copter.

                 more no of rotors -------> more stability------> low maneuverability

 

Quad-copter

What is the Quad-copter? 

A quad-copter, also called a quad-rotor helicopter, quad-rotor, is a multi-rotor helicopter that is lifted and propelled by four-rotors. Quad-copters are classified as rotorcraft, as opposed to fixed-wing aircraft, because their lift is generated by a set of revolving narrow-chord airfoils.
The quad-copter rises four column of air to make that more stable than tri-copter and helicopter.

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Tri-copter

what is Tricopter?
A tri-copter is a multirotor aircraft that uses three motors and propellers
 (arranged in a horizontal triangle) to stay airborne. Tri-copter is unlike
a helicopter that rises on a single column of air, the tri-copter rises
on three columns of air making it more stable. It uses 3 standard brushless
out-runner motors.

Introduction to Multi rotors

what are multi-rotors ?

A multirotor or multicopter is a rotorcraft with more than two rotors. Multirotors often use fixed-pitch blades, whose rotor pitch does not vary as the blades rotate; control of vehicle motion is achieved by varying the relative speed of each rotor to change the thrust and torque produced by each.
Due to their ease of both construction and control, multirotor aircraft are frequently used in model and radio control aircraft projects in which the names tricopter, quadcopter, hexacopter and octocopter are frequently used to refer to 3, 4, 6 and 8 rotor respectively.