How can military transport aircraft deliver supplies and paratroopers without landing?

Military transport aircraft deliver supplies and paratroopers without landing by utilizing specialized design features, most notably large, operable cargo doors in the rear or side of the fuselage. These doors can be opened and closed during flight, allowing personnel and cargo to be deployed via parachute while the aircraft remains airborne.12

Historically, the Douglas C-47 became the definitive aircraft for this capability during World War II. Its design included a reinforced floor to support heavy loads and large doors that allowed for the efficient dropping of paratroops and supplies directly into combat zones. This logistical flexibility enabled Allied forces to insert troops behind enemy lines and resupply units in areas where landing was impossible or too dangerous. Beyond direct drops, these aircraft could also tow gliders to deliver troops and equipment to landing zones without the transport plane itself having to touch down.21