Williams (2007) highlighted the engineering options for the improvement in aircraft fuel efficiency, and these options had included the changes to airframes, engines, avionics, air traffic control systems, airspace design, and improved market based measures.
Villa learnt his trade of "aircraft mechanic" in the Royal Flying Corps; his first job was fitting Beardmore 160 hp engines to airframes.
The Wright brothers thus differed sharply from more experienced practitioners of the day, notably Clément Ader, Maxim and Langley who built powerful engines, attached them to airframes equipped with unproven control devices, and expected to take to the air with no previous flying experience.
With slight modifications to the airframe, it plans to produce this in China, to be marketed under the name E-Spyder.
Half the machine is already built RotorWay completes all the welds, for example–but the boxes hold the rest of the bits you'll need, many of them preassembled and ready to be bolted to the airframe.
The worrisome flaw is intermittent arcing, in which electricity leaks out to another wire or to the airframe but only briefly, and sometimes repeatedly, a phenomenon known as sputtering.
Encouraging results have been obtained for benchmark test cases using the new technique which is believed to be potentially applicable to other airframe noise problems where both tonal and broadband parts are important.
Rotorcraft are inherently very non-linear, whilst also requiring a greater complexity of mathematical modelling to capture the periodic inputs to the airframe from the rotors.
Today the objective is to utilize an airframe to its maximum service life, a.k.a.a
