uncleflo
Registered since September 28th, 2017
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An Introduction to the Physics of Sailing | MIT BLOSSOMS
Saved by uncleflo on January 20th, 2021.
The goal of this lesson is to explain how sailboats work by exploring basic physics principles. At the end of this lesson, students will be able to identify the forces acting on a sailboat and explain how the combination of these forces results in the forward motion of a sailboat. Students should be familiar with vectors and be able to use them to represent forces and moments, and also should be familiar with using free body diagrams to represent forces and moments. A basic understanding of fluid flow and/or resistance might be helpful, but not necessary. This lesson and the follow-on assessment will each take about one hour to complete. Students only need pen/pencil and paper to complete the activities in the lesson, although an optional activity where students make their own sailboats would require additional materials. The classroom activity challenges are centered around small-group discussions based on the questions posed before each break. Free body diagrams, or another conceptual representation of his or her answer, should support each student’s solution to the questions posed in the video. Instructions for the option of having students design their own sailboats as part of this lesson can be found here: https://tryengineering.org/teacher/sail-away/
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5086 Aluminum Pipe
Saved by uncleflo on December 20th, 2019.
Request a quote today for 5086 aluminum pipe. We are standing by and ready to take your order fast and with the best customer service around. Tork Systems is a leading supplier to the military and commercial marine industry. We provide a wide range of valves, pipe and fittings to the U.S. Navy, Coast Guard, offshore and shipbuilding companies in the United States. Our experienced team has extensive experience in navy and marine piping applications to assist you with your technical requirements. Our warehouse is strategically located for immediate access to our California Bay Area customers and close proximity to U.S. operations in Hawaii and the Pacific Rim. Tork Systems is proud to represent the finest marine valve manufacturers in the U.S.A. Our American Excellence in Valves™ campaign aligns select manufacturers that adhere to the highest standards of quality, domestic labor force, and American grit to create the most comprehensive portfolio of domestic made valves in the country. It makes sense for our customers, it makes sense for our vendors, and it makes sense for our country.
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On the Comparison of the Long Penetration Mode (LPM) Supersonic Counterflowing Jet to the Supersonic Screech Jet
Saved by uncleflo on December 7th, 2016.
The authors provide a brief overview of the classic tonal screech noise problem created by underexpanded supersonic jets, briefly describing the fluid dynamic-acoustics feedback mechanism that has been long established as the basis for this well-known aeroacoustics problem. This is followed by a description of the Long Penetration Mode (LPM) supersonic underexpanded counterflowing jet phenomenon which has been demonstrated in several wind tunnel tests and modeled in several computational fluid dynamics (CFD) simulations. The authors provide evidence from test and CFD analysis of LPM that indicates that acoustics feedback and fluid interaction seen in LPM are analogous to the aeroacoustics interactions seen in screech jets. Finally, the authors propose applying certain methodologies to LPM which have been developed and successfully demonstrated in the study of screech jets and mechanically induced excitation in fluid oscillators for decades. The authors conclude that the large body of work done on jet screech, other aeroacoustic phenomena, and fluid oscillators can have direct application to the study and applications of LPM counterflowing supersonic cold flow jets.
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Underactuated Robotics
Saved by uncleflo on April 5th, 2015.
This book is about building robots that move with speed, efficiency, and grace. I believe that this can only be achieve through a tight coupling between mechanical design, passive dynamics, and nonlinear control synthesis. Therefore, these notes contain selected material from dynamical systems theory, as well as linear and nonlinear control.
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Compressible Aerodynamics Calculator
Saved by uncleflo on July 16th, 2014.
This calculator is intended to provide a faster more convenient alternative to printed tables and charts (e.g. NACA Report 1135). The core of the code was written in Javascript by William Devenport at the Aerospace and Ocean Engineering Department, Virginia Tech. Five sets of relations are included; The relations themselves are taken from standard aerodynamics texts. Symbols have their usual meanings. 'Gamma' and 'rho' are substituted for the corresponding greek letters denoting the ratio of specific heats and density. Subscript 'o' is used to refer to stagnation or total conditions, superscript '*' refers to sonic conditions.
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Boston Dynamics: Dedicated to the Science and Art of How Things Move.
Saved by uncleflo on May 19th, 2012.
BigDog is the alpha male of the Boston Dynamics robots. It is a rough-terrain robot that walks, runs, climbs and carries heavy loads. BigDog is powered by an engine that drives a hydraulic actuation system. BigDog has four legs that are articulated like an animal’s, with compliant elements to absorb shock and recycle energy from one step to the next. BigDog is the size of a large dog or small mule; about 3 feet long, 2.5 feet tall and weighs 240 lbs.
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