To summarize, science becomes knowledge by publication of research results. It then may become more general knowledge as writers of textbooks pick and choose what to put in their texts, and as professors and teachers then decide what to stress from those textbooks.
The Hughes H-4 Hercules (also known as the  Spruce Goose ; registration NX37602) is a prototype heavy strategic airlift military transport aircraft designed and built by the Hughes Aircraft Company.oward Hughes was called to testify before the Senate War Investigating Committee in 1947 over the use of government funds for the aircraft. During a Senate hearing on August 6, 1947 (the first of a series of appearances), Hughes said: The Hercules was a monumental undertaking.
Sikorsky Aircraft for Sale. The Sikorsky S-76 helicopter is manufactured by Sikorsky Aircraft Corporation and its first flight was on March 13th 1977. As of March 2011, Sikorsky has built over 774 Sikorsky helicopters.This is a medium sized American aircraft and its mainly used for commercial utility.he Sikorsky S-76 uses a crew of two and has a carry capacity of 12-13 passengers. Itâs powered by twin Turbomeca Arriel 2S2 turbo shaft engines. The helicopter cruises at 178 mph and has a range of 473 miles. If youâre looking at Sikorsky helicopters for sale, please take a look at our Sikorsky S-76 for sale below.