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1. A Basic Overview of Fuel Cellhttp://americanhistory.si.edu/fuelcells/basics.htm 2. Comparison between fuel cells vs electric batterieshttps://protonex.com/wp-content/uploads/2017/02/Protonex_UAV_Presenation_20170126_FINAL.pdf 3. DOE 's technical target (and current status) of energy efficiencyhttps://energy.gov/eere/fuelcells/doe-technical-targets-fuel-cell-systems-portable-power-and-auxiliar..

1. Improper balance of a helicopter’s load can result in serious control problems. In addition to making a helicopter difficult to control, an out-of-balance loading condition also decreases maneuverability since cyclic control is less effective in the direction opposite to the CG location.- What is the cyclic control?https://en.wikipedia.org/wiki/Helicopter_flight_controlsThe control is called ..

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http://large.stanford.edu/courses/2012/ph240/ Introduction to the Physics of EnergyPH240 - Stanford University - Fall 2012R. B. LaughlinReports1FarzanehAfshinmaneshNanophotonics Pave the Way for Solar CellsPlasmonic Solar Cells2ShivAgarwalModeling Transmission LinesElectronic Cooling3HadisehAlaeianLanthanide Doped Up-Converters for Photovoltaic ApplicationsBi-Molecular Up-Converters4HamzaAljamaa..

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Design Guide Line 1. Ribs height and thickness 1-1. Heigh of Boss, H = 2.5DBoss diameter, wall thickness, and height design parameters. While boss heights vary by design, the following guidelines will help avoid surface imperfections like sink marks and voids: the height of the boss should be no more than 2 1/2 times the diameter of the hole in the boss. 1-2. Rib-to-wall thickness ratios, 60% Th..