uncleflo
Registered since September 28th, 2017
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Tekna | Ideal Powder At Your Fingertips
Saved by uncleflo on February 12th, 2022.
Leader in ICP Plasma Systems and Manufacturer of Advanced Material Powders Tekna offers turn-key plasma systems and also CUSTOMIZATION OF OUR SYSTEMS. Spheroidization enables the production of highly spherical powder particles, compatible with even the most demanding applications. Nanopowder synthesis enables the production of highly pure nanomaterials, from different types of precursors (solid, liquid or gasses). Deposition by induction plasma enables the production of high-density coatings through efficient melting and deposition. Tekna PlasmaSonic products are used to simulate flight at high velocity or during re-entry conditions under high temperature and heat fluxes. These equipments enable the introduction of low-fluctuation powders into the plasma systems with low or high flow rates.
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The Boat Design Directory from Boat Design Net - the Boat Design and Boatbuilding Site
Saved by uncleflo on February 9th, 2022.
Boat Design . Net - Connecting Boat Designers and Boatbuilders on the Net. Boat Design and Boat Building Projects, Plans, Software, Books, Concepts, Reviews, and Resources. Discussion forums: boat design, boat building, powerboats, sailboats, multihulls, design software, education, services and employment. Join in the boat design & boatbuilding discussion forums today! A gallery of professional and student design work, projects in process, power and sail. Please post your boat design & boat building images for everyone to see. A marine design directory and search engine. Boat plans, designers, boatbuilders, materials, powerboats, catamarans, propulsion, sailboats, multihulls, shipyards, software, books, & resources. A site connecting boat builders and designers, showcasing innovations in design and construction and providing access to articles, resources, software, and inspirational sites.
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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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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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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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The J Class Association
Saved by uncleflo on February 23rd, 2019.
The J Class Association (JCA) was founded to protect the interests of the Class, present and future. To keep the J-Class fleet and races alive and to encourage new build yachts to enter the field, new Class rules were established for the construction of Replica Rebuilds from original plans. One of the key drivers of the J-Class revival was the decision of the J-Class Association to allow aluminium and other materials to be used as a hull construction material. This reinforced the renewed interest among owners to build J-class yachts. After a performance analysis by Gerard Dijkstra of the existing J's as well as the designs that were allowed to be built under the new JCA rules, a specific J Class handicap system was developed in order to enable all yachts built to the J Class designs to race against each other regardless of size, sail area or hull construction.
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Wind Turbine Design
Saved by uncleflo on November 28th, 2018.
Primary objective in wind turbine design is to maximize the aerodynamic efficiency, or power extracted from the wind. But this objective should be met by well satisfying mechanical strength criteria and economical aspects. In this video we will see impact of number of blades, blade shape, blade length and tower height on wind turbine design. The next big factor which is affecting performance of wind turbine is shape and orientation of blade cross section. A moving machine experiences fluid flow at a different velocity than the actual velocity. It is called as relative or apparent velocity. Apparent velocity of flow is difference between actual flow and blade velocity. Absolute velocity of the flow is shown in first figure, while apparent velocity in the second figure. It is clear that apparent velocity of flow is vectorial difference between actual and blade velocity. The vector difference is shown in the first figure at a particular cross section. A rotating blade will experience an apparent velocity of flow.
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Snell's law - Wikipedia, the free encyclopedia
Saved by uncleflo on February 22nd, 2015.
Snell's law (also known as the Snell–Descartes law and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air. In optics, the law is used in ray tracing to compute the angles of incidence or refraction, and in experimental optics to find the refractive index of a material. The law is also satisfied in metamaterials, which allow light to be bent "backward" at a negative angle of refraction with a negative refractive index.
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Interactive Nozzle Simulator
Saved by uncleflo on September 2nd, 2014.
With this software you can investigate how a turbojet or rocket nozzle produces thrust by changing the values of different factors that affect thrust. By changing the shape of the nozzle and the flow conditions upstream and downstream, you can control both the amount of gas that passes through the nozzle and the exit velocity. There is another version of this program that has been modified for rocket nozzles. With the rocket version, you can specify a wider variety of propellant combinations.
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Nozzle Design
Saved by uncleflo on September 2nd, 2014.
A rocket engine uses a nozzle to accelerate hot exhaust to produce thrust as described by Newton's third law of motion. The amount of thrust produced by the engine depends on the mass flow rate through the engine, the exit velocity of the flow, and the pressure at the exit of the engine. The value of these three flow variables are all determined by the rocket nozzle design.
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