A wing flying up side down can produce upward thrust to lift the craft! (not very well, but it works)How (I think) a wing does work Before looking at real wings airfoils, first some information about how solid objects move through a space filled with pressurized the gas (air). Gravit...
Ever wanted to fly the Stealth Bomber? There's a passenger plane version in the works. Learn more about these futuristic flying wings!
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The hang glider's wing, called a delta wing or Rogallo wing, is an outgrowth of NASA engineer Francis Rogallo's research on kites and parachutes in the 1960s. Rogallo had proposed the wing as a method of returning spacecraft to Earth. The delta-wing parachute was lightweight, durabl...
2. A Deep Understanding of Your Audience (and Your Competition) Standing out on social platforms isn’t about coming up with new ideas. Anything that works will soon be copied, remixed, and reposted anyway. What makes your brand shine is your ability to connect with your target audience. Ev...
In the time before take-off, a pilot reviews this information, works out the flight plan, files it with air traffic control and meets with the rest of the crew. Once the airplane has landed, the captain meets with the arriving flight crew to find out if they experienced any irregularities...
the canopy to inflate the cells and give the parachute an airfoil shape. This shape makes the parachute act like a wing (see How Airplanes Work for a description of wings). Instead of coming straight down like you would with a round parachute, you actually glide in with a ram-air chute...
Still in the conceptual stage,Subsea Shuttles are 400-feet-long, autonomous submarines that would be used to transport carbon dioxide to deepwater storage facilities. This process, known as carbon sequestration, removes carbon dioxide from the atmosphere. Using a flowline, these battery-powered, subm...
The wheel hub is fixed rigidly to an upright, telescopic, tubular strut which has its top end anchored to the frame or to a reinforced wing. On front wheels, the whole strut swivels to allow steering. Pivoted arms extend inward and forward to the frame in order to keep the wheel upright...
Here is an example of using a global variable within multiprocessing. We can clearly see that each process works with its own copy of the variable: import multiprocessing import os import random import sys import time def worker(new_value): old_value = get_value() set_value(random.randint(...