Look at the structure first — Page 535, Lesson 651

This is the index of the book — the alphabetical listing of every term we'll cover in this performance section. I want to walk you through what this index actually tells you, because it's a map of the entire syllabus. Look at the structure first. Each entry has the term, then a page number. Some have multiple page numbers — like "Gross Performance" at pages 6 and 18, or "Landing Distance Requirements" at pages 238 and 349. That tells you the term is introduced early, then revisited in depth later. When you see a term like "Indicated Airspeed" listed twice — once at page 6 and again at page 113 — the first is the definition, the second is where it's applied in a calculation. Now let me highlight the key terms you'll be tested on. Under F, we have "Fixed Pitch Propeller" at page 6 — that's a propeller whose blade angle cannot be changed in flight, a fundamental concept for performance. "Flap Extended Speed" and "Flap Setting" — these are the speed limits and configuration settings for flaps, critical for takeoff and landing performance. "Flat Rated Engines" at page 26 — that's an engine whose power output is held constant up to a certain temperature, a key concept for hot-day operations. "Flight Level" at page 6 — that's a pressure altitude expressed in hundreds of feet, like FL350 meaning 35,000 feet. Under G, "Go-around" at page 6 — the missed approach procedure. "Gradient Requirement" at page 215 — the climb gradient you must achieve, expressed as a percentage. "Gross Height" and "Gross Performance" — these relate to the unadjusted, theoretical performance before corrections. "Ground Climb Gradient" at page 66 — the climb gradient relative to the ground, which accounts for wind. "Ground Minimum Control Speed" at page 6 — the minimum speed at which you can control the aircraft on the ground with one engine failed. Under H, "Height" at page 6 — the vertical distance above a reference, distinct from altitude. "Hydroplaning" at page 159 and "Hydroplaning Speed" at page 6 — when the tires ride on a film of water, losing contact with the runway, and the speed at which that occurs. Under I, "ICAO Standard Atmosphere" at page 6 — the international reference model of the atmosphere, with defined temperature, pressure, and density. "IFR Conditions" — Instrument Flight Rules weather. "Increased V2 Speed" at page 292 — a higher takeoff safety speed used in certain conditions. "Indicated Airspeed" — the speed shown on the airspeed indicator, uncorrected for instrument and position error. "Induced Drag" at page 152 — the drag created by generating lift, and its curve at page 51. Under J, "Jet Aeroplane Endurance" at page 119 and "Jet Aeroplane Range" at page 124 — how long and how far a jet can fly, with their own specific formulas. Under L, we have a cluster of landing terms. "Landing Climb Requirements" at pages 237 and 347 — the climb performance you must demonstrate during a go-around. "Landing Distance" at page 149 — the actual distance to land. "Landing Distance Available (LDA)" at pages 7 and 150 — the runway length declared available for landing. "Landing Distance Formula" at page 155 — the calculation method. "Landing Distance Requirements" at pages 238 and 349 — the regulatory minimums. "Landing Gear Extended Speed" and "Landing Gear Operating Speed" at page 7 — the maximum speeds for having gear down and for operating it. "Landing Minimum Control Speed" at page 7 — the minimum control speed in the landing configuration. "Landing Requirement" at page 203 — the overall landing performance requirement. "Landing Technique on Slippery Runways" at page 160 — how you handle hydroplaning conditions. "Large Aeroplane" at page 7 — the regulatory definition, typically over 5,700 kg. "LCN" at page 12 — Load Classification Number, a runway strength rating. "LDA" and "LDR" at page 13 — the abbreviations for Landing Distance Available and Landing Distance Required. "Lift" at page 7 — the aerodynamic force perpendicular to the relative airflow. "Load Factor" at page 7 — the ratio of lift to weight, expressed in g. "Long Range Cruise (LRC)" at page 138 — the speed for maximum range with a small fuel penalty. "LRC" at page 13 — the abbreviation. Under M, "Mach Number" at pages 7 and 116 — the ratio of true airspeed to the speed of sound. "Manoeuvre Ceiling" at pages 7 and 325 — the maximum altitude at which you can achieve a given load factor. "Mass" at page 29 — the quantity of matter, distinct from weight. "MAT" at page 13 — an abbreviation, likely Maximum Allowable Takeoff mass. "Maximum Angle of Descent" at page 95 — the steepest descent angle. "Maximum Brake Energy Speed" at page 7 — the speed at which the brakes absorb maximum energy. "Maximum Continuous Power" and "Maximum Continuous Thrust" at page 7 — the maximum power or thrust you can sustain continuously without engine damage. Here's the key insight about this index: it's not just a list — it's your study checklist. Every term here is a potential exam question. When you see a term with multiple page numbers, that's a signal the concept builds — you learn the definition early, then apply it later. When you see abbreviations like LDA, LDR, LRC, MAT, LCN — you must know both the full name and the abbreviation, because the exam will use either. Now, the figures I have available — Figure 5.1, 5.2, and 5.3 — those are for the forces in straight and level flight, which is where we'll start. But that's the beginning of the actual chapter content, not the index. The index is your roadmap. When we move into the chapter proper, we'll start with those forces — lift, weight, and the couples they create — and build from there. So that's the index. It's the skeleton of the entire performance syllabus. Every term you see here, you'll encounter in detail as we work through the chapter.