Before the advent of helicoptering, aspiring for one's children was not always considered a primary good.
BEFORE the advent of affordable helicopter rides, a backcountry ski trip was primitive.
Inhabiting an area of several thousand square miles accessible only by boat until the advent of the helicopter, the marshes were a traditional center of rebellion and banditry.
Brigadier Sebastian Roberts, one of the architects of British land-war doctrine, insists that, for the foreseeable future, western armies will need heavy armour to hold territory and make the point in a tangible way that "I'm here and I'm staying .British thinking about land warfare is evolving with the advent of attack helicopters which can loiter, gather information and wield huge firepower.
Not even Leonardo, who 500 years ago foresaw the advent of bicycles and helicopters.
The advent of jet engines provided helicopters with more power and flexibility, for they allowed operations at higher altitudes and temperatures.
At that time no one could have foreseen the advent of jet aircraft, turbine-powered helicopters, ski-planes, data-recording machines powered by radioactive isotopes, and polar-orbiting satellites that automatically collect meteorologic and upper atmosphere data across the continent and transmit it to a base collection station.
Britain's own official Ministry of Defence publication, the Manual of the Law of Armed Conflict, says there are practical difficulties around surrenders to aircraft, but adds: "With the advent of close-support and ground-attack helicopter units, the surrender of ground troops … has become a more practical proposition".
The helicopter animation consisted of projecting a series of helicopter movements with the main and tail rotor of the helicopter rotating, each lasting 20 sec, separated by 20-second periods of projecting gray air.
