Transport
Discover facts about transport. Small discoveries that change the way you see familiar things.
Transport
Playing loud music without headphones gets you grounded
On a plane, loud music without headphones competes with crew instructions and alarms. Ignore the cabin rules and the airline may remove you before the plane…
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How cargo ships unload grain like liquid
Pneumatic unloaders blow air through grain to loosen the kernels, then suck the flowing mixture into pipes and send it ashore. The grain moves like a liquid…
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Your swinging arms save effort when you run
The arms counter some of the rotation produced by your legs. Experiments that restricted arm movement found a higher energy cost as runners compensated with…
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Why some subway stations are built like gentle hills
The useful shape is a hump: trains climb toward the platform, turning some speed into height, then roll downhill as they depart. Gravity helps with both…
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Canoes rely on perfect symmetry to glide through water
A canoe’s matching sides keep its weight balanced and its hull moving evenly through the water. A lopsided shape pushes water unevenly and yaws off course,…
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Earth equator measures exactly twenty four thousand miles
The equator is the widest circle around Earth, so it gives the planet its biggest possible lap. Measure a full loop there and you get the famous roughly…
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Safer motorcycle riding meant fewer organ donations
Helmets prevent fatal brain injuries, which means more riders survive—and fewer deaths leave organs suitable for donation. It’s a grim statistic with a simple…
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Why Melbourne drivers turn right from the left lane
Melbourne’s hook turn keeps right-turning cars out of the path of trams running through the center of the road. Drivers wait in the left lane, then turn…
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How jetpacks defeat gravity with thrust
A jetpack points its exhaust downward; the equal push upward lifts the pilot against gravity. The catch is the fuel: the engines burn it fast, so flight…
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Spinner luggage wheels sacrifice interior volume
Spinner wheels sit outside the suitcase’s corners, with housings that eat into the packing space. The bag glides beside you, but those extra wheels charge…
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The A-10 moved its nose wheel aside to make room for the gun
The large 30-millimeter cannon occupies the forward fuselage, so the nose landing gear sits off the aircraft's centerline. The asymmetry is deliberate…
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Why wealthy Romans rode behind curtains
Curtains on a Roman litter blocked sun, dust, and the stares of people on the street. Wealthy passengers got shade and privacy while their bearers supplied…
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Roosevelt Island tramway carries locals high above water
The tram hangs from cables that carry it over the East River, giving Roosevelt Island residents a direct ride to Manhattan without a bridge-bound detour. The…
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Why kick scooters make every bump worse
Their small, solid wheels and lack of suspension send every bump straight to the rider, so even a twig can make the ride jolt.
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A toll plaza can create a bottleneck after you pay
Multiple booths let several drivers pay at once, but those lanes often have to merge back into fewer highway lanes. Stopping at the cashier is only one source…
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Why solid deodorant passes airport security
Airport carry-on rules target liquids, not solid sticks. Deodorant that stays put in the tube gets through while its sloshier cousins face the tiny-bottle…
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Bicycles have the same road rights as cars
On public roads, bicycles are treated as vehicles, so riders follow traffic rules and drivers must share the road with them. The bike gets road rights without…
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Dangling massive weights from factory ceilings
The hanging weight is a shock absorber for the building. When machinery shakes the floor, the mass swings out of step and its damper soaks up some of that…
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Dry vans are standard enclosed road trailers
A dry van is an enclosed box trailer: solid walls and a roof keep ordinary freight out of rain and road spray. ‘Dry’ means protected from the weather, not…
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Early motorists often wore their weather protection
Open cars left drivers exposed to wind, dust, insects, and rain. Goggles and heavy motoring clothing supplied protection that later became part of the vehicle…
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The backpack straps that move weight to your hips
A snug hip belt transfers much of a pack’s weight from your shoulders to your pelvis, where your body can support it more comfortably. The straps turn your…
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Auto-rickshaws navigate heavy traffic with only three wheels
Three wheels give an auto-rickshaw a narrow footprint, so it slips through gaps a car has to admire from behind. The trade-off shows up in a sharp turn: less…
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The wartime aircraft with no way back
The Japanese Ohka was a piloted flying bomb, released from a bomber near its target and powered by rockets for the final attack. It had no landing gear for a…
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Standard vehicle batteries abruptly die at the worst times
A car battery doesn’t fade politely: the starter asks for a sudden flood of electricity. As the battery ages, it struggles to deliver that surge, so the…
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