It is important not to confuse IMC with IFR (instrument flight rules) â IMC describes the actual weather conditions, while IFR describes the rules under which the aircraft is flying. Aircraft can (and often do) fly IFR in clear weather, for operational reasons or when flying in airspace where flight under VFR is not permitted; indeed by far the majority of commercial flights are operated solely under IFR.
Norbert Rillieux. Norbert Rillieux (1806-1894) was the inventor of the multiple-effect vacuum evaporator, which revolutionized the processing of sugar. He gained recognition as one of the prime architects of the modern sugar industry.
Demand increased for smaller units and the Carrier Company obliged. In 1928, Willis Haviland Carrier developed the first residential 'Weathermaker', an air conditioner for private home use. The Great Depression and then WW2 slowed the non-industrial use of air conditioning.After the war, consumer sales started to grow again.The rest is history, cool and comfortable history. Willis Haviland Carrier did not invent the very first system to cool an interior structure, however, his system was the first truly successful and safe one that started the science of modern air conditioning.emand increased for smaller units and the Carrier Company obliged. In 1928, Willis Haviland Carrier developed the first residential 'Weathermaker', an air conditioner for private home use. The Great Depression and then WW2 slowed the non-industrial use of air conditioning.