Let me start with the first entry: Fixed Pitch Propeller, page 6 — Page 535, Lesson 651

This is the index of the book — the alphabetical list of every topic covered in this Mass and Balance and Performance manual. I want to walk you through what this index tells you about the structure of the course, because it's a map of everything we're going to cover. Let me start with the first entry: Fixed Pitch Propeller, page 6. A fixed pitch propeller is one where the blade angle is set at the factory and cannot be changed in flight. It's a simple, lightweight design, and it's a performance term because the propeller's efficiency changes with airspeed. Next, Flap Extended Speed, page 6. This is the maximum airspeed at which you may fly with the flaps extended. It's a structural limit — exceed it and you risk damaging the flap mechanism or the flap structure itself. Then Flap Setting, page 31. This refers to the selected position of the flaps — typically measured in degrees of deflection. Different settings change the wing's camber and therefore its lift and drag characteristics. Flaps or Gear on Total Drag, page 54. This is a key performance concept: extending flaps or landing gear increases total drag. Flaps increase induced drag primarily, while gear adds parasitic drag. The index is pointing you to where we'll study that relationship. Flat Rated Engines, page 26. A flat rated engine is one whose power output is limited by a control system to a constant value up to a certain ambient temperature, even though the engine could produce more. This is important for takeoff performance calculations. Flight Level, page 6. This is a pressure altitude expressed in hundreds of feet, referenced to the standard pressure setting of 1013.25 hectopascals. So Flight Level 350 means 35,000 feet on the standard altimeter setting. Moving to G: Go-around, page 6. This is the procedure of aborting a landing and climbing back out — a critical performance case because you need enough thrust and climb gradient with gear and flaps extended. Gradient Requirement, page 215. This is the minimum climb gradient — the ratio of vertical height gained to horizontal distance — that regulations require for a given phase of flight, like takeoff or missed approach. Gross Height, page 6. This is the height above the ground, as opposed to pressure altitude. It's the actual physical height. Gross Performance, pages 6 and 18. This is the performance of the aeroplane as calculated from the manufacturer's data, before any operational margins are applied. It's the raw capability. Ground Climb Gradient, page 66. This is the climb gradient measured relative to the ground, which accounts for wind — it's the gradient you actually achieve over the terrain. Ground Minimum Control Speed, page 6. This is the minimum speed at which, during takeoff, you can maintain directional control with one engine inoperative and the other at takeoff thrust, without deviating from the runway centreline. Height, page 6. This is the vertical distance above a specified datum, usually the ground or a reference point. Hydroplaning, page 159. This is when a layer of water separates the tyres from the runway surface, causing loss of braking and directional control. Hydroplaning Speed, page 6. This is the speed at which hydroplaning begins — it depends on tyre pressure and water depth. I: ICAO Standard Atmosphere, page 6. This is the international reference model of the atmosphere — sea level temperature 15°C, pressure 1013.25 hPa, and a specific lapse rate. All performance calculations are referenced to it. IFR Conditions, page 6. Instrument Flight Rules conditions — weather where you cannot maintain visual reference and must fly by instruments. Increased V2 Speed, page 292. V2 is the takeoff safety speed. Sometimes regulations require you to use a higher V2 than the minimum — that's the increased V2 speed, and it affects climb performance. Indicated Airspeed, pages 6 and 113. This is the airspeed shown on the instrument, uncorrected for instrument and position errors. Induced Drag, page 152. This is drag created by the generation of lift — it's the drag that results from the wing's downwash and tip vortices. Induced Drag Curve, page 51. This is the graphical representation of how induced drag varies with airspeed — it decreases as speed increases. J: Jet Aeroplane Endurance, page 119. This is the time an aeroplane can remain in the air on a given fuel load — for jets, it's maximised at a specific speed. Jet Aeroplane Range, page 124. This is the distance a jet can fly on a given fuel load — a different optimum speed than endurance. L: Landing Climb Requirements, pages 237 and 347. These are the regulatory climb gradient requirements for the go-around configuration during a landing. Landing Distance, page 149. This is the horizontal distance required to land and bring the aeroplane to a stop. Landing Distance Available (LDA), pages 7 and 150. This is the length of runway declared available and suitable for landing — the physical runway length you have. Landing Distance Formula, page 155. This is the calculation method for landing distance, accounting for factors like weight, wind, and runway condition. Landing Distance Requirements, pages 238 and 349. These are the regulatory requirements that the landing distance must not exceed the LDA, with margins. Landing Gear Extended Speed, page 7. This is the maximum speed at which you may fly with the landing gear extended. Landing Gear Operating Speed, page 7. This is the maximum speed at which you may extend or retract the landing gear — it's often lower than the extended speed. Landing Minimum Control Speed, page 7. This is the minimum speed for directional control during landing with an engine inoperative. Landing Requirement, page 203. This is the overall regulatory requirement for landing performance. Landing Technique on Slippery Runways, page 160. This covers the correct technique — like avoiding heavy braking — to manage landing on wet or contaminated surfaces. Large Aeroplane, page 7. This is a regulatory definition — typically an aeroplane with a maximum takeoff mass above a certain threshold, which triggers specific performance requirements. LCN, page 12. Load Classification Number — a number that rates the load-bearing capacity of a pavement. LDA, page 13. Landing Distance Available — the runway length available for landing. LDR, page 13. Landing Distance Required — the distance the aeroplane needs to land. Lift, page 7. The aerodynamic force perpendicular to the relative airflow that supports the aeroplane's weight. Load Factor, page 7. The ratio of the lift to the weight of the aeroplane — expressed in g. Long Range Cruise (LRC), page 138. A cruise speed that gives near-maximum range with a small fuel penalty — a practical operating speed. LRC, page 13. The abbreviation for Long Range Cruise. M: Mach Number, pages 7 and 116. The ratio of true airspeed to the speed of sound. Manoeuvre Ceiling, pages 7 and 325. The maximum altitude at which the aeroplane can still achieve a specified load factor or manoeuvrability. Mass, page 29. The quantity of matter in the aeroplane — the correct technical term, distinct from weight. MAT, page 13. This is likely an abbreviation for a performance term — I'll cover it in context when we reach that page. Maximum Angle of Descent, page 95. The steepest descent angle achievable — used for obstacle clearance. Maximum Brake Energy Speed, page 7. The maximum speed from which the brakes can absorb the energy of stopping without overheating — a critical limit for rejected takeoffs. Maximum Continuous Power, page 7. The maximum power an engine can produce continuously without damage. Maximum Continuous Thrust, page 7. The same concept for jet engines — the maximum thrust that can be maintained indefinitely. So this index is your roadmap. Every one of these terms — from fixed pitch propellers to maximum continuous thrust — is a performance limit, a regulatory requirement, or a calculation method that you'll need to know precisely. We'll work through them in order, and by the end you'll understand how each one fits into the safe operation of an aeroplane.