uncleflo
Registered since September 28th, 2017
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Arvel Gentry | North Sails
Saved by uncleflo on April 10th, 2021.
In the first edition of the Art and Science of Sails, written by Tom Whidden, president of North Sails Group, LLC, and Michael Levitt, and published by St. Martin’s Press, the authors used Arvel Gentry’s now famous Bathtub Experiment to demonstrate the existence of Circulation, or a second force, that operates around an airfoil, like a sail, wing, or keel etc. Big picture: it’s the combined effort of these two forces that makes the wind speed up on the leeward side — and thus show low pressure — and slow down on the windward side of a sail — high pressure. Gentry was the Boeing engineer who first taught sailors aerodynamics. These diagrams first appeared in Gentry’s Sail magazine articles. In the Revised Edition, the authors used computer testing to show where the wind speeds up around a sail plan and where it slows down. And why and by how much? Nevertheless, Gentry’s experiment is the standard — still popular on the web — and it was left it out of the Revised Edition with trepidation, but we linked in the book to this web page.
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Linear Motion, Linear Bearings, Linear Guides, Linear Actuators, Shafting
Saved by uncleflo on August 1st, 2019.
At PBC Linear, product design engineers come together from a wide range of disciplines in R&D, product design, and application-specific engineering. This mingling of minds and degrees of expertise allows us to specialize in several key industries. Our roots in aerospace, commercial, medical, hydraulic, and paper industries provide customers with a multi-dimensional approach to every type of project. The end results are cost-effective solutions that customers can use to get their linear motion applications up and running quickly.
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LEE Linear Precision Linear Motion Components
Saved by uncleflo on July 30th, 2019.
Visit the Configurator for custom configurations, CADs, and quotes! Our latest tips, tricks, and information, all in one place! Lee Linear has produced world-class, linear motion components and linear shafting for over 40 years. With the ability to manufacture custom shafting—threading, diameter reduction, keyways, flats, plating, and more—to required standards in a short amount of time, Lee Linear is able to fulfill orders on time, eliminating downtime and increasing profits for our customers.
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Sensor Fusion Algorithms For Autonomous Driving: Part 1 The Kalman filter and Extended Kalman
Saved by uncleflo on July 24th, 2019.
Tracking of stationary and moving objects is a critical function of Autonomous driving technologies. Signals from several sensors, including camera, radar and lidar (Light Detection and Ranging device based on pulsed laser) sensors are combined to estimate the position, veloctiy, trajectory and class of objects i.e. other vehicles and pedestrians. A good introduction to this topic can be found at: http://www.onenewspage.com/video/20161006/5695999/Mercedes-Benz-presents-the-Sensor-Fusion-at-2016.htm
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Waterfall model - Wikipedia
Saved by uncleflo on January 18th, 2019.
The waterfall model is a relatively linear sequential design approach for certain areas of engineering design. In software development, it tends to be among the less iterative and flexible approaches, as progress flows in largely one direction ("downwards" like a waterfall) through the phases of conception, initiation, analysis, design, construction, testing, deployment and maintenance. The waterfall development model originated in the manufacturing and construction industries; where the highly structured physical environments meant that design changes became prohibitively expensive much sooner in the development process. When first adopted for software development, there were no recognized alternatives for knowledge-based creative work.
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Euler-Bernoulli Beams: Bending, Buckling, and Vibration
Saved by uncleflo on September 2nd, 2014.
Euler-Bernoulli Beams: Bending, Buckling, and Vibration. 2.002 Mechanics and Materials II Department of Mechanical Engineering MIT February 9, 2004
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Isotropic Linear Elastic Stress Concentration, Massachusetts Institute of Technology
Saved by uncleflo on September 2nd, 2014.
The primary objectives of this lab are to introduce the concept of stress and strain concentration factors in notched structural configurations. The notion of stress concentration is experimentally explored qualitatively, using photoelasticity, and quantitatively, using experimental, analytical, and numerical methods. 2.002 Mechanics and Materials II, Spring 2004
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