Flight Mechanics

Brake Specific Fuel Consumption (BSFC) is a key performance parameter used in flight mechanics and aerospace engineering to measure the fuel efficiency of an aircraft’s engine. It is defined as the amount of fuel consumed by the engine per unit of thrust produced or power delivered. BSFC (g/kW·h) = (Fuel Flow Rate in grams per […]

Specific Fuel Consumption (SFC) in flight mechanics is a measure of the fuel efficiency of an aircraft’s engine. It represents the rate at which fuel is consumed by the engine to produce a specific amount of thrust or power. Using Thrust (SFC in g/kN·h): SFC (g/kN·h) = (Fuel Flow Rate in grams per hour) /

In flight mechanics and aircraft propulsion, the term “power stroke” is not commonly used to describe the fuel consumption process. Instead, fuel consumption is typically analyzed over the entire operation of the engine rather than isolated power strokes. The mass of fuel taken in power stroke =Vs*(density/air fuel ratio AFR) Vs: Swept volume Density: Density

In flight mechanics and aircraft engineering, the propeller diameter refers to the size or dimension of the circular area swept by the propeller blades during rotation. It is a critical parameter that directly influences the propeller’s performance and efficiency. d=(v/n*j) v: True airspeed (TAS) of the aircraft. or velocity n: Rotational speed of the propeller

The power required to overcome drag in flight mechanics is often referred to as “Drag Power” or “Power Required.” It represents the amount of power that the aircraft’s engines must produce to counteract the aerodynamic drag that opposes the aircraft’s forward motion. Power Required = 1/2 * ρ * v^3* s * CD    

In flight mechanics, the term “glide” refers to a controlled descent of an aircraft without the use of engine power. During a glide, an aircraft’s engines are typically either shut down or set to idle, and the aircraft relies on its aerodynamic properties to maintain forward motion and generate lift. R = (h * Cl

In flight mechanics, the angle of glide refers to the angle between the flight path of an aircraft during a glide and the horizontal plane. It is a crucial parameter that pilots use to control the descent and manage the aircraft’s energy during glide operations, especially during emergencies or engine-out situations. sin γ = d/w

In flight mechanics, the term “total head behind the disc” refers to the total energy that exists behind a rotating propeller or rotor disc in an aircraft. It is also known as “total pressure recovery” or “total pressure behind the disc.” “p∞ + 1/2 * ρ * v^2∞” Atmospheric pressure (p)infinite in n/m^2 Density (Rho)

In flight mechanics, the term “total head ahead of the disc” refers to the total energy present in the airflow ahead of a rotating propeller or rotor disc in an aircraft. It is also known as “total pressure” or “stagnation pressure” ahead of the disc. Total head is the measure of a pump’s ability to

In flight mechanics, the term “area of disc” refers to the total area swept by the blades of a rotating propeller or rotor. This concept is important in the study of aircraft propulsion systems and rotorcraft aerodynamics. A = π/4 * d^2 d means diameter of the propeller