It tells you exactly which concepts matter and where they live in the book — Page 537, Lesson 656

This is the index of the book — the alphabetical list of terms and the pages where they appear. So what I want to do is walk you through the key entries here, because this index is actually a map of the whole syllabus. It tells you exactly which concepts matter and where they live in the book. Let's start with the runway entries, because they cluster together. We have Runway at page 8, Runway Slope at page 30, Runway Strength at page 274, Runway Strip at page 8, Runway Surface at page 31, and Runway Threshold at page 8. Now, the runway itself is the paved surface you land on and take off from. The runway strip is a defined area that includes the runway and, typically, some cleared ground beyond each end and to the sides — it's there to protect an aircraft that overruns or veers off. The runway threshold is the start of the portion of runway that's available for landing — it's the beginning of the landing surface, marked by the threshold bars. Runway slope is the gradient along the runway, and it matters because an uphill slope helps you stop on landing but hurts you on take-off, and a downhill slope does the reverse. Runway strength is about how much weight the pavement can bear — that's a structural limit on the aeroplane's mass. And runway surface refers to the condition and type of the pavement — dry, wet, contaminated, grass, asphalt — which directly affects braking and acceleration. Now, under S, we have Screen at page 8. In performance terms, the screen is an imaginary vertical obstacle at a specified height above the runway — typically 35 feet for land-based aeroplanes — that the aircraft must clear during take-off or landing. It's a certification reference point. Then we have the Segments — Segment 1 at page 301, Segment 2 at page 302, Segment 3 at page 302, and Segment 4 at page 302. These are the four phases of the take-off flight path, and each one has its own gradient requirement. Segment 1 is the initial climb from the screen height with the landing gear still down. Segment 2 is the climb with gear up but flaps still in the take-off setting — this is usually the critical one because it has the strictest gradient. Segment 3 is the acceleration phase where you're levelling off to retract the flaps. And Segment 4 is the final climb to the en-route configuration. Each segment has a minimum climb gradient you must meet, and that's a certification limit. Service Ceiling at page 8 — that's the altitude at which the aeroplane can no longer climb faster than a specified rate, typically 100 feet per minute. Above that, the climb performance is too weak to be useful. SFC at page 14 — that's Specific Fuel Consumption. It's a measure of how much fuel the engine burns per unit of thrust per unit of time. It's the efficiency figure for the powerplant, and it feeds directly into range and endurance calculations. Stabilizer Trim at page 278 — that's the adjustable horizontal stabilizer that you use to balance the aeroplane in pitch. It's a control surface that sets the trim condition so the aircraft flies hands-off at a given speed and configuration. Step Climbs at page 135 — that's a technique where, instead of climbing continuously, you climb in stages. You level off, burn fuel, get lighter, then climb again to a higher altitude. It's used on long flights to optimise fuel burn as the mass decreases. Stopways at pages 9 and 22 — a stopway is an area beyond the end of the runway, cleared and prepared, that an aeroplane can use to stop in the event of an aborted take-off. It's not part of the runway itself, but it's available for stopping. Now under T, we have the take-off family. Take-off at page 21 is the whole manoeuvre. Take-off Distance at page 169 is the total distance from the start of the take-off roll to the point where the aeroplane reaches the screen height. Take-off Distance Available, or TODA, at page 9 — that's the runway length plus any clearway, the total distance available for the take-off to be completed. Take-off Flight Path at page 219 is the actual three-dimensional path the aeroplane follows from brake release until it reaches a specified height. Take-off Mass at page 9 is the mass of the aeroplane at the start of the take-off. Take-off Power at page 9 is the power setting used for take-off. Take-off Requirements / Field Length Requirements at page 170 — that's the set of rules that ensure the take-off distance and the accelerate-stop distance don't exceed what's available. Take-off Run Available, or TORA, at page 9 — that's the length of runway actually available for the ground roll, the run along the pavement. Take-off Safety Speed at page 9 — that's the speed, typically V2, at which the aeroplane can climb safely after an engine failure. Take-off Speeds at pages 29 and 217 — that's the family of speeds like V1, VR, and V2 that govern the take-off. Take-off Thrust at page 9 is the thrust setting used for take-off. And finally, Taxiway at page 9 — that's the path that connects the runway to the apron or parking area, used for ground movement. So this index is your roadmap. Every one of these terms — the runway geometry, the segments, the take-off speeds, the field length requirements — they all come together in the performance chapters. When we get to those pages, we'll build each one up properly.