Separation of Lift and Thrust

Free to try, no login

In the text below some words are missing. Drag words from the box below to the appropriate place in the text. There are more words than you need.

Early aviation pioneers struggled because they attempted to combine lift and propulsion into a single mechanism. In the nineteenth century, an English engineer proposed these functions, establishing modern aeronautical principles. By designing fixed-wing gliders with cambered , he demonstrated that air flowing over a curved wing lift. This conceptual breakthrough allowed later experimenters to refine structural before introducing mechanical engines.

Drag a word into a gap, or tap a word and then a gap. Tap a filled gap to empty it.

Questions 2–5

In the text below some words are missing. Drag words from the box below to the appropriate place in the text. There are more words than you need.

Read them here; log in to answer and check them.

Weight-Shift Flight Control

Before aerodynamic rudders became standard, early hang glider pilots relied on shifting their 1 weight to control flight attitude. By swinging their legs and torso, aviators 2 the centre of gravity relative to the wing's centre of pressure. Although this method enabled basic steering and descent 3, it proved dangerously inadequate in turbulent wind conditions, where sudden gusts easily 4 the pilot's strength.

altered
regulation
physical
balanced
velocity
overwhelmed
restored

Truss Bracing in Biplanes

Early gliders required lightweight yet 1 frameworks to withstand aerial forces without collapsing. Engineers addressed this challenge by adapting architectural bridge trusses, 2 two parallel wings with vertical wooden struts and diagonal wire bracing. This biplane configuration 3 aerodynamic loads effectively while minimising structural mass. The resulting airframe possessed immense torsional 4, creating a robust platform that significantly improved safety during unpowered test flights.

connecting
rigid
altitude
transmitted
stiffness
yielding
distributed

Wing Warping Mechanics

Achieving three-axis control was the 1 obstacle confronting early glider designers. To govern roll, experimenters devised a system known as wing warping, which twisted the trailing edges of the 2 wings in opposite directions. By pulling control cables, the pilot increased lift on one side while 3 it on the other, initiating a controlled banking turn. This mechanism established the 4 for modern movable ailerons.

flexible
propulsion
decreasing
secondary
foundation
primary
releasing

Thermal Soaring Techniques

Unlike powered aircraft that rely on engine thrust, modern sailplanes gain altitude by exploiting rising atmospheric air currents. Solar radiation warms the ground unevenly, creating 1 columns of ascending warm air called thermals. Glider pilots 2 these invisible updrafts and fly in tight circles within them to climb 3. Once sufficient height is achieved, the sailplane glides efficiently toward the next thermal, covering vast cross-country 4.

abruptly
buoyant
dissipate
locate
steadily
distances
turbulent

Want to answer the other 4?

Log in to practise Reading: Fill in the Blanks in the BandLadder app: the full question bank, instant scoring the way Pearson marks it, and answer explanations.

Ready for the whole test?

Take a full PTE mock with every question type, the real timings and a score on Pearson's 10–90 scale the moment you finish.

Try a free PTE mock →

Keep practising

Early Gliders and Aerodynamics