What are drones.
An unmanned aerial vehicle also referred to as drone is an aircraft piloted by remote control or onboard computers without interference of a human pilot aboard. UAVs are a component of an unmanned aircraft system (UAS) which include a UAV, a ground-based controller, and a system of communications between the two.

BASIC PRINCIPLE OF DRONES.
The drone can work on various principles as : COMMUNICATION :- Communication between the vehicle with the control headquarter. LOOP PRINCIPLE :-Almost all drones uses closed loop or open loop. The open loop here provide the positive control of the signal without needing feedback from sensors. While the close-loop, it employs feedback from the sensors to adjust. FLIGHT CONTROL :- this is the similar principle in manned aviation. It controls something like flight dynamics, automation and similar parameters.

uses of drones
Military surveillance Surveys and inspections Agriculture Search and rescue operations Traffic monitoring Exploring hazardous sites Weather and climatic mapping.

CONSTRUCTION OF DRONES.
COMPONENTS THAT EVERY DRONE MUST HAVE : WATERPROOF MOTOR FRAME FLIGHT AND MOTOR CONTROLLERS MOTORS TRANSMITTERS AND RECIEVERS PROPELLERS SOURCE OF ENERGY SPECIAL EQUIPMENT.

ADVANTAGES OF DRONES.
SAVES TIME MORE EFFICIENT LOW RISK IMPROVED SAFETY EASY TO DEPLOY

DISADVANTAGES OF DRONES.

CAN BE POTENTIALLY MISUSED. VIOLATION OF ANY REGULATION MAY LEAD TO SERIOUS OFFENCE. LEADS TO UNEMPLOYMENT TO A CERTAIN EXTENT. LESS ECONOMICAL PRESENTLY CANNOT COMMUNICATE WITH PEOPLE FOR DETAILED INFORMATION ON SITES.

Importance of drones in construction practices.
CAN BE POTENTIALLY MISUSED. VIOLATION OF ANY REGULATION MAY LEAD TO SERIOUS OFFENCE. LEADS TO UNEMPLOYMENT TO A CERTAIN EXTENT. LESS ECONOMICAL PRESENTLY CANNOT COMMUNICATE WITH PEOPLE FOR DETAILED INFORMATION ON SITES. Application of drones in construction

IDENTIFYING PROPERTY BOUNDARIES SUB DIVIDING LAND PLACEMENT OF BUILDINGS TO PRODUCE TOPOGRAPHIC AND HYDROGRAPHIC MAPS VOLUMETRIC CALCULATIONS

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