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" ... And Airbus test pilot flew this small, electric-powered plane on a short demonstration flight flight ... [+] at the Paris Air Show in 2015. But neither Airbus nor rival Boeing is anywhere close to building a full-size electric-powered commercial plane. That engine nacelle on the plane's side is not a jet engine, but rather an electric fan. MUSTAFA YALCIN/Getty Images ... "
" ... As the accident report details, the Boeing 737-8 (MAX), was certified under the FAA’s Changed Product Rule as a derivative of the 737-800, while introducing the CFM LEAP-1B engine with a larger fan diameter and redesigned engine nacelle compared to engines installed on the 737 Next Generation (NG) family. ... "
" ... Next the nacelle is raised into place which contains the gearbox, the generator and control systems that will be located at the top of the turbine tower. The final stage of the work is lifting the giant set of blades up to the top of the tower. Again guided by hand to prevent damage to the tip of a blade, the hub is finally put into place, and fixed there. The barge then returns to Belfast for another load of components. Each turbine has a rated capacity of 5 MW and it is claimed that 200 of them are needed to match the output of a conventional power station. However, the capacity factor (efficiency) is probably only 20 -30%, and so a mean output from 200 turbines will be nearer 300 MW, far short of the 1,000 MW power output of a typical fossil-fuel fired or nuclear power station. ... "
" ... The trend is toward more blades, and blades that are thinner and more swept to increase efficiency. GE Aviation’s Dowty Propellers in the U.K. is studying a turbo-propulsion system concept that integrates the propeller, nacelle, engine and other systems to achieve 3-5% improvement in fuel efficiency and a 4-6-dB reduction in noise. Concepts include an eight-blade, swept-prop design. ... "