uncleflo
Registered since September 28th, 2017
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Surfboard Hull Design
Saved by uncleflo on September 14th, 2018.
I have been wondering about this a lot in Mini Simmons surfboard design (surfboard design in general)—what is a hull and how does it influence the board and the ride? Two factors are at work when a planing surfboard is in motion: the propulsion power, or force, that creates forward motion (the wave energy); the resistance that opposes it (your fat ass standing on the board). When at rest, a surfers weight is borne entirely by the buoyant force (also depending on how much beer you drank the night before). At low speeds every hull acts as a displacement hull, meaning that the buoyant force is mainly responsible for supporting the surfer. As speed increases, hydrodynamic lift increases as well. Ok, you got to reach back to some physics for this one.
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PaintCode
Saved by uncleflo on September 19th, 2014.
Few days ago, Apple introduced iPhone 6 Plus. The new iPhone substantially changes the way graphics are rendered on screen. We've made an infographic to demystify this. The downscaling ratio is 1920 / 2208 = 1080 / 1242 = 20 / 23. That means every 23 pixels from the original render have to be mapped to 20 physical pixels. In other words the image is scaled down to approximately 87% of its original size.
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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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Air-Breathing Launch Vehicle Technology Being Developed
Saved by uncleflo on September 2nd, 2014.
Of the technical factors that would contribute to lowering the cost of space access, reusability has high potential. The primary objective of the GTX program (ref. 1) is to determine whether or not air-breathing propulsion can enable reusable single-stage-to-orbit (SSTO) operations. The approach is based on maturation of a reference vehicle design with focus on the integration and flight-weight construction of its air-breathing rocket-based combined-cycle (RBCC) propulsion system.
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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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Test X180 Ignite by Force Factor | Free Trial
Saved by uncleflo on July 15th, 2014.
An interestingly designed website, all part of single images. The website is about creating confidence, muscle, performance, workout routines, boost muscle mass, and other stamina.
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True, Reactive, and Apparent power : Power Factor
Saved by uncleflo on February 23rd, 2014.
We know that reactive loads such as inductors and capacitors dissipate zero power, yet the fact that they drop voltage and draw current gives the deceptive impression that they actually do dissipate power. This “phantom power” is called reactive power, and it is measured in a unit called Volt-Amps-Reactive (VAR), rather than watts. The mathematical symbol for reactive power is (unfortunately) the capital letter Q. The actual amount of power being used, or dissipated, in a circuit is called true power, and it is measured in watts (symbolized by the capital letter P, as always). The combination of reactive power and true power is called apparent power, and it is the product of a circuit's voltage and current, without reference to phase angle. Apparent power is measured in the unit of Volt-Amps (VA) and is symbolized by the capital letter S.
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