Forces acting on a plane

What is Total Reaction

Sum of Lift & Drag

How is the Mean aerodynamic chord (MAC) best defined

Median Distance from the leading edge to the trailing edge

Increasing camber moves the CoP where?

Forward on the wing

What do high aspect ratio wings do (lift/drag)

Creast same lift for less drag

Air velocity within the boundary layer compared to RAF is?

Slower

Define Weight → Wheres it act through

Force created by gravity, pulling plane to earth’s centre → through CoG

Define Lift → Wheres it act through

Generated by aerofoil counteracting weight. Acts through Centres of Pressure. Always Perpendicular to RAF

Define Thrust → Wheres it act through

Force created by propellor (enginge produces power) pulling plane forward → The Propellor

Define Drag → Wheres it act through

Created by interaction between plane and airflow, opposite to direction of motion → Parallel to RAF

What is Wing Loading?

How much load the wing carries in S&Lw

Wing Loading Formula

Weight of aeroplane ÷ wing area

Define Streamline Flow

Succeeding molecules following the same path in a flow,

Define Laminar Flow

Streamlined, non - turbulent airflow

Define Turbulent Flow

Molecules not gollowing a streamlined flow pattern

Define Transition point

Flow changes from Laminar to Turbulent

Define Seperation Point

Where turbulent flow seperates becoming turbulent wake

What direction does RAF act to drag/lift

Drag → Parallel, Lift→ Perpendicular

Whats Coandǎ Effect

Fluid flowing over a concave surface following the curve rather than original path

What happens to CoP a AoA increases

Moves Forward

What is the CL dependant on

Camber & AoA

4 Flap Types

Plain, split, fowler, slottedW

What do Slotted flaps do?

Delays seperation of air

What do Fowler Flaps do?

Increase camber & surface area

How long is wake turbulence seperation

3 minutesP

What are the 3 Parasite drag types

Skin friction, Form, Interference