airlines never know exactly how much fuel is going to cost. Domestic airlines in the U.S. spend a combined $2 to $5 billion on jet fuel every month [source:Air Transport Association].
Typically, you'll see the prop-driven plane soar upward in a steep ascension, only to stall out and fall into a dramatic spin. The principles of an accidental spin are much the same. A spin has three basic phases. The initial phase is called an incipient spin, in which the dropping ...
Mechanical advantage is a measurement of how much a simple machine multiples a force. The bigger the mechanical advantage, the less force you need, but the greater the distance you have to use that force. The weight rises 1m, but now we have to pull the loose end of the rope twice as ...
7 The metal grains in the blade are now aligned parallel to the blade by a process calleddirectional solidifying.The grain direction is important because the turbine blades are subjected to so much stress; if the grains are aligned correctly, the blade is much less likely to fracture. The sol...
A sink stopper is a clever and inexpensive must-pack gadget. Fill the sink or tub with water, immerse the clothes, and knead them with your hands, much like kneading dough. Then drain off the water, squeeze the clothes to remove as much of the dirty water as practical, and set them ...
The largest deluxe bag systems are capable of lifting as much as 70 tons 20 inches off the ground at full inflation [source: Simplex]. In addition to the lifters, shoring equipment is necessary to make sure the passageways the teams create are stable and safe to travel into. Traditional ...
When jet engines scream through the sky firing hot gases like rocket jets in their wake, they're wasting energy. There's not much we can about that in a plane, but we can do something about it in power station. We can take the hot exhaust gases coming from a gas turbine and use ...
“I’m not doing much loading anymore,” he says, “but I’m still using my skills and imagination to come up with interesting solutions to things.” When Hurricane Sandy hit New York in 2012, to U.S. Postal Service — one of UPS’s biggest customers — lost a massive fleet of truc...
As a digital nomad, I think it’s easy for me to get trapped in the job. The internet will always take as much time as you give it. I get stuck behind my computer and stuck in my itinerary, and I feel that Ihaveto go to X or do Y. I’ve forgotten how travel is always best...
I’m just not working out as much, so that has slowed me down." But Rebel told People in March 2024 that she plans to focus on living a healthy lifestyle again soon. “I think once this press tour is over for the book, I'll just go back to a bit more of a normal schedule ...