uncleflo
Registered since September 28th, 2017
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Tag selected: airflow.
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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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CB-1210 GRIZZLY Cubic Mini Wood Stove - Cubic Mini Wood Stoves, Canada
Saved by uncleflo on October 6th, 2019.
Our customers asked for it and we delivered! Same as the original Cub CB-1008 but slightly larger. Available in brass or black trim Mini cook stove designed to be used in boats, cabins and RV's Designed to cook and will heat spaces from 200 to 400 square feet Durable! Constructed from laser cut steel plate 1/8 to 3/16 thick! Produces 8000 to 18000 BTU's! Insulated with a vermiculite fire brick
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Theta360 Guide Dealing with Heat during Live Stream
Saved by uncleflo on October 8th, 2018.
The unit below overheated 16 minutes into the shoot. It is using UVC Blender and a USB cable during an indoor shoot at Stanford during a crowded VR event. If the THETA is overheating, point a standard household fan at it. The airflow may be enough to cool the outside of the THETA and help with the internal overheating. People have reported success by sticking $6 Raspberry Pi heatsinks onto the body of the THETA or taping or attaching a small fan used for computer CPUs to the outside of the THETA. 6 piece Addicore heatsink for Raspberry Pi for $5.95; Mudder 8 piece black heatsink cooler for RPi for $6.99; TinkerCad Fan Holder for 3D printing.
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FoilSim Download
Saved by uncleflo on June 3rd, 2014.
FoilSim - Student was developed at the NASA Glenn Research Center in an effort to foster hands-on, inquiry-based learning in science and math. FoilSim is interactive simulation software that determines the airflow around various shapes of airfoils. The Airfoil View Panel (shown below) is a simulated view of a wing being tested in a wind tunnel with air moving past it from left to right. Students change the position and shape of the wing by moving slider controls that vary the parameters of airspeed, altitude, angle of attack, thickness and curvature of the airfoil, and size of the wing area. The software displays plots of pressure or airspeed above and below the airfoil surface. A probe monitors air conditions (speed and pressure) at a particular point on or close to the surface of the airfoil. The software calculates the lift of the airfoils, allowing students to learn the factors that influence lift. The software includes a stall model for the airfoil and a model of the Martian atmosphere for lift comparisons. The latest version (FoilSim III - Version 1.4b) performs a table look-up of experimental data to determine the drag of the foil. A technical paper describing the details of the mathematical method used in FoilSim is also available.
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