Flying saucers

Sikorsky Cypher

The Sikorsky Cypher and Cypher II are types of unmanned aerial vehicles developed by Sikorsky Aircraft. They are vertical takeoff and landing aircraft which use two opposing rotors enclosed in a circular shroud for propulsion. (Wikipedia).

Sikorsky Cypher
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Crazy VTOL Aircraft Type and Size Comparison 3D

VTOL - A vertical take-off and landing aircraft is one that can hover, take off, and land vertically. Some VTOL aircraft can operate in other modes CTOL - conventional take-off and landing aircraft STOL - short take-off and landing aircraft STOVL - short take-off and vertical landing a

From playlist Comparison

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The First Air Commando Group's combat helicopter rescue.

The History Guy remembers the first combat helicopter rescue and the Sikorsky R-4b in the China/Burma/India theater. The practical use of rotary aircraft came sooner than many people realize. Pushing the new technology to its very limit, one pilot undertakes a dangerous mission to save c

From playlist US History

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Isosceles Triangle Theorem: Dynanic Desmos Illustrator

Isosceles triangle theorem animation & explorer made in #Desmos. https://teacher.desmos.com/activitybuilder/custom/60742b18afd8ae0d274b6efb #MTBoS #ITeachMath #math

From playlist Desmos Activities, Illustrations, and How-To's

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The US Marine CH-53K King Stallion Helicopter is Worthy of Its Name

The Sikorsky CH-53K King Stallion heavy-lift helicopter has passed the initial operational test and evaluation phase of its development ahead of its entry into service in 2022. Join our YouTube channel by clicking here: https://bit.ly/3asNo2n Find us on Instagram: https://bit.ly/3PM21xW F

From playlist Military Mechanics

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America's lost stealth helicopter - RAH 66 Comanche

https://brilliant.org/CuriousDroid It was going to be the next generation helicopter of the 21st century bringing stealth and the digital battlefield into rotary aircraft but it ended in cost overruns, delays and cancellation after just two prototypes, this is the story of Americas lost st

From playlist Planes, Trains and Automobiles

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Katyn - WWII's Forgotten Massacre

The disturbing story of the Soviet massacre of thousands of Polish officers and intelligentsia at Katyn, Russia in 1940 and the subsequent cover-up and German investigation of the crime scene. Dr. Mark Felton is a well-known British historian, the author of 22 non-fiction books, including

From playlist Poland

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The Sikorsky JRS-1, the Forgotten Heroes of Pearl Harbor

So many aircraft were destroyed in the attack on Pearl Harbor that the United States Navy lacked planes to search out the Japanese fleet still lurking nearby. The Sikorsky JRS-1, called the "flying pickup truck," was pressed into service. This is original content based on research by T

From playlist US History

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Search And Rescue Helicopter Transported Inside Unique Aircraft Carrier | Huge Moves | Spark

A team of engineers race to move a £20 million search and rescue helicopter, almost 3,500 miles, from a Pennsylvania factory in the USA to its coastguard base in the Shetland Islands. The Coastguard has a tight deadline to get the helicopter into service so they can’t afford to wait for de

From playlist Huge Moves

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Ruby Conf 2013 - Being Boring: A Survival Guide to Ruby Cryptography

We all know that security is hard, and that math is hard, but what happens when you put them together? Cryptography is an increasingly essential tool for building secure systems, but also a perilous minefield where any number of mistakes can lead to insecure systems. This talk will take y

From playlist Ruby Conf 2013 - Miami Beach, FL

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From playlist Daring Raids

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Generalized Bisection Method for Systems of Nonlinear Equations

Generalization of the Bisection Method for solving systems of equations. This lesson explains the algorithm for a 2 dimension example based on Harvey-Stenger's approach using bisecting triangles. It includes a visualization of the method in action on an example nonlinear system. Other meth

From playlist Solving Systems of Nonlinear Equations

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What is a radian? 🤔 Interactive dynamic radius wrapping exploration for Ss: https://www.geogebra.org/m/e3aamere #GeoGebra #MTBoS #ITeachMath #algebra #geometry #trigonometry #mathchat

From playlist Trigonometry: Dynamic Interactives!

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