15 terms

UAS Flex 102

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Electrical Propulsion System
Stores energy in the form of batteries to power electric motors, driving propulsion systems
Electronic Speed Controller
(ESC) An electronic circuit whose purpose is to vary an electric motor's speed and/or its direction
Energy Density
The amount of energy stored in a given system or region of space per unit volume
Fuel Propulsion System
Stores energy in the form of gasoline or nitro fuels and uses an engine to drive propulsion systems
Engine
One or more working cylinders in which the process of combustion takes place within the cylinders
Propulsion
To drive, or cause to move, forward or onward; overcome forces of gravity and drag for prolonged flight
Servo
Rotary actuator that allows for precise control of angular position, velocity and acceleration
Battery
Store chemical energy for conversion to electrical energy
Battery Memory
An effect observed in nickel-based batteries when charged from a less-than-fully-drained charge level, they develop a "memory" and pick up charging at the same level over and over essentially losing capacity
Capacity
Measure of energy stored in a battery when fully charged, measured in either watt-hours (Wh), kilowatt-hours (kWh), or ampere-hours (Ahr)
Discharge Rating
Measure of how quickly the battery can be safely discharged
Lithium-based Batteries
Most commonly used in UAS applications; high energy discharge rate
Nickel-based Batteries
Developed memory when charging, replaced by Lithium batteries
Number Of Cells
Battery specification that tells number of cells and whether are in series or parallel
Voltage
The electric energy charge difference of electric potential energy transported between two points