uncleflo
Registered since September 28th, 2017
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Tag selected: efficiency.
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Interesting Sailboats: SOLAR PANELS ON SAILS
Saved by uncleflo on February 13th, 2022.
I don't sail but this idea interests me. Why couldn't a turbine of some description be fitted to the underside or even integrated into the keel to add to energy produced That is called an hydrogenerator and many oceanic sailboats use them. On the Vendee Globe, the non stop sailing race around the world most boats have two. They are expensive, with a price around 4/5000 euros. Finally somebody is working actively in what seems to be an obvious way to generate electric electricity on sailboats: Photo-voltaic sails. Till now the technology did not allow for panels flexible enough to allow that but on last years the technology has evolved a lot. It is already possible and it will not be expensive in the future. At least a sail manufacturer is working already actively on that, the UKsails France branch.
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Tutorial | AMK
Saved by uncleflo on February 12th, 2022.
This video demonstrates how to do an easy Start-up of an AMK Servo System. Here we are showing a decentralized servo system. However, start up is the same with cabinet or hybrid servo systems. The programming is done with our engineering tool AIPEXPRO and Codesys.
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MIT OCW - 2.972 How a Hydrofoil Works
Saved by uncleflo on February 12th, 2022.
The rquirement is to lift the boat's hull outside the water. Hydrofoil (It is a foil or wing under water used to lift the boat's hull until it is totally outside the water.) Explanation: 1. At low speeds the hull (body of ship) sits in the water and the hydrofoils are totally submerged in the water. 2. As the boat's speed increases, the hydrofoils create lift. 3. At a certain speed, the lift produced by the hydrofoils equals the sum of of the boat and cargo weights. Therefore the hull comes out of the water. 4. Instead of having an increase in drag with increasing speed because the hull is lifted out of the water (contrary to what happens in traditional boats due to pressure drag), the hydrofoils provide a more efficient way of cruising. Decreasing the drag contributes to the better use of the power needed for the movement of the boat.
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Showersave Stockists - Waste Water Heat Recovery System - QB1-21
Saved by uncleflo on February 9th, 2022.
Suitable for new builds, home extensions and retrofitting, the Showersave QB1-21 and Showersave QB1-21C use the heat from the water flowing out of the shower to warm up the cold water going in. This simple heat exchange mechanism means that you spend less money on electricity or gas heating up the water to your shower. Can also be installed under "shower over bath" plumbing situations. WRAS approved. The hot and cold waters are kept separate by the double walled copper pipe design. An efficiency of +60% depending on flow rate. The QB1-21 superseds the old RECOH-VERT RV3 system. The unit is exactly the same size, however the energy efficiency has been improved. The Cyclone Top Fitting increases the efficiency of the Showersave by making the hot waste shower water swirl around and down through the central copper pipe of the Showersave. This increases the amount of time the hot water is in contact with copper pipe to maximise heat transfer. Greater heat recovery is achieved with the Cyclone top.
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HOME | arcaspace
Saved by uncleflo on February 6th, 2022.
EcoRocket is designed around two main features: cost-effectiveness and eco-friendliness and it is designed to launch commercial payloads starting with 2021. The EcoRocket Heavy will follow. The first two stages are reusable and are using water-based propulsion technology that generates water vapours through cold reaction. The expandable third stage uses conventional hot rocket propulsion and it's ignited at high altitude, above the thick atmosphere. Both the first and second stage use the high efficiency aerospike engine technology. The whole rocket uses 86% water-based propellant. ARCA already tested this technology at full-scale. EcoRocket is sea-launched, directly from the sea surface, the first sea trials taking place on the Black Sea, in July 2021. EcoRocket is competing in the European Commission's 10 million Euros competition that aim to stimulate the creation of new, small orbital launchers that are cost effective and friendly to the environment.
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Best Budget TIG Welder UK - Tools Guide
Saved by uncleflo on January 31st, 2022.
If you wish to achieve top-notch welds with adequate structural integrity, then you need to bring home the perfect TIG welder. This becomes even more important if you are working on a project where it is mandatory to stick to industry codes and standards. While the market is filled with ‘n’ number of TIG welders, choosing one can be a challenge if you have a stringent budget to adhere to. To make things easier, we have listed six of the best TIG welders which can cater to all your on-job demands without blowing a hole in your wallet and some helpful buying tips. Revive your passion for steel sculpturing with the Röhr WSME-250 which is specially designed for sufficing the requirements of both new and experienced users. You can easily undertake house maintenance, vehicle fabrication and similar unconventional chores with this AC/DC welder.
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Codility: Online Coding Tests & Programming Assessments
Saved by uncleflo on January 17th, 2022.
Learn about tech hiring trends and give your team an edge in the talent war. By increasing their engineering capacity, we help the world’s biggest companies solve problems that matter. Codility is the #1 rated technical recruitment platform for teams to test the coding skills of developers and make evidence-based hiring decisions. We can help you conduct coding interviews and test programming skills of developers at scale – turning a challenge into one of your greatest opportunities. Hire remote developers now.
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Pros and Cons of Monocrystalline vs Polycrystalline solar panels
Saved by uncleflo on December 20th, 2019.
There are 3 types of technology utilized in the solar panels available on the market today, these are monocrystalline, polycrystalline, and thin film amorphous. As the names suggest Monocrystalline and Polycrystalline are both types of solar cells that are made from crystalline silicon. Almost all quotes you will get when considering buying solar panels for your home will use crystalline solar panels. 2-3 years ago the most common type of solar panel used in residential solar installations in America were monocrystalline solar panels but in the last three years polycrystalline solar panels have become the most commonly used solar panels in residential solar installations in America.
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Compare 5 best solar panels by reviews, efficiency, & price
Saved by uncleflo on December 20th, 2019.
At SolarReviews our mission is to arm consumers that want to buy solar panels with the best information tools possible to help them find the best solar panels for their home, the best inverter for their solar system and also the best solar prices they can get. Buying solar panels is not a simple purchasing decision because they are designed to last at least 25-30 years and so this is a long-term investment. In the first table below you will find our expert reviews of the top 5 brands of residential solar panels commonly used in the US in 2019.
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Panasonic HIT N330 330 Watt Solar Panel - Low Wholesale Price
Saved by uncleflo on December 20th, 2019.
Panasonic HIT solar panels use HIT heterojunction monocrystalline solar cells with record breaking efficiency. An excellent proven alternative to other high efficiency solar panels like LG & Sunpower. Proudly featuring Panasonic's original invention, the heterojunction solar cell. With over 1 billion cells produced commercially over 18 years, 25 years after the breakthrough in the development and looking back to over 40 years of experience in solar. Panasonic really offers you a 25-year guarantee you can trust. Panasonic photovoltaic modules HIT® feature an innovative hetero-junction cell structure made of mono-crystalline and amorphous silicon layers. Ultra-thin amorphous silicon layers prevent recombinations of electrons, keeping carrier loss to an absolute minimum. As a result, HIT® conversion efficiency ratings are among the highest available today.
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GelPlane Professional Osmosis Treatment, Gel Plane, Gel-Plane, strips, peels gelcoat, stripper
Saved by uncleflo on December 19th, 2019.
The removal of the gelcoat is the first stage of any Osmosis blistering treatment and peeling is widely accepted as the most cost effective system for guaranteeing an assured repair. The GelPlane has well documented advantages of speed, economy and quality of finish but further, with the dust extraction system the workplace remains clean. GelPlane International provides the product not the peeling service allowing the yard to benefit from convenient work scheduling, quality control and the profitability of working in house.
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Bldc Motor 10kw 48v 72v 96v 10000w Kit Air Cooled Bldc Motor - Buy Bldc Motor,10kw Bldc Motor,10000w Bldc Motor Product on Alibaba.com
Saved by uncleflo on December 19th, 2019.
BLDC motor 10kW electric motorbike motor 48v /72v /96v 10000W Clean, Efficient, Light Weight, Powerful BLDC Motor Drive Kits for Electric Car, ATV, Go-Kart, Golf Buggy Model: HPM10KW -- High Power BLDC Motor
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Ductwork sizing, calculation and design for efficiency - HVAC Basics + full worked example - YouTube
Saved by uncleflo on October 11th, 2019.
How to design a duct system. In this video we'll be learning how to size and design a ductwork for efficiency. Includes a full worked example as well as using CFD simulations to optimise the performance and efficiency. Discover more than 50 free on-demand webinars on different topics, from ventilation or data center design and wind load analysis to aerospace, F1, and sports aerodynamics here.
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Pololu 3.3V Step-Up Voltage Regulator U1V11F3 – Melopero
Saved by uncleflo on August 1st, 2019.
This compact (0.45″×0.6″) U1V11F3 switching step-up (or boost) voltage regulator efficiently generates 3.3 V from input voltages as low as 0.5 V. Unlike most boost regulators, the U1V11F3 offers a true shutdown option that turns off power to the load, and it automatically switches to a linear down-regulation mode when the input voltage exceeds the output. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.
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Ubiquiti Networks - AirFiber 5XHD
Saved by uncleflo on November 29th, 2018.
The New Standard for WISP Backhaul Performance. True 1Gbps+ Spectrally Efficient, Noise Resilient PTP Technology Specifically Designed for WISP’s. Complete Custom Hardware for the WISP, right down to the Silicon. Our core communications processing engine surpasses all of the limitations inherent to generic Wi‐Fi chips. Game-Changing LTU Technology. Spectral Efficiency Comparison of 802.11n, 802.11ac, airFiber Original, and LTU by year. Industry Leading Complete Software Suite
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Data Warehousing Summary Tables
Saved by uncleflo on June 27th, 2018.
This document discusses the creation and maintenance of "Summary Tables". It is a companion to the document on Data Warehousing Techniques. The basic terminology ("Fact Table", "Normalization", etc) is covered in that document. Summary tables are a performance necessity for large tables. MariaDB and MySQL do not provide any automated way to create such, so I am providing techniques here. (Other vendors provide something similar with "materialized views".) When you have millions or billions of rows, it takes a long time to summarize the data to present counts, totals, averages, etc, in a size that is readily digestible by humans. By computing and saving subtotals as the data comes in, one can make "reports" run much faster. (I have seen 10x to 1000x speedups.) The subtotals go into a "summary table". This document guides you on efficiency in both creating and using such tables.
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Part 1: Landing Page 101 - The Smart Marketer’s Landing Page Conversion Course
Saved by uncleflo on June 10th, 2015.
In this 11-part course landing page expert Oli Gardner and 10 renowned conversion rate optimization experts (including Rand Fishkin, Peep Laja, Michael Aagaard, Copyblogger, Hubspot and more), will walk you through how to create high-converting landing pages. The course includes step-by-step instructional videos so you can follow along, creating your own landing pages as you go.
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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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Unity - Game Engine
Saved by uncleflo on April 4th, 2015.
Unity 5 is the new edition of the best development platform for creating 2D/3D games and interactive experiences. Unity 5 brings you awesome new artistic power. Improved efficiency makes the hard work smoother and more fun, and with the industry’s most comprehensive multiplatform support, you can now launch your game on 21 platforms.
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Basic of Space Flight: Rocket Propellants
Saved by uncleflo on September 2nd, 2014.
Propellant is the chemical mixture burned to produce thrust in rockets and consists of a fuel and an oxidizer. A fuel is a substance that burns when combined with oxygen producing gas for propulsion. An oxidizer is an agent that releases oxygen for combination with a fuel. The ratio of oxidizer to fuel is called the mixture ratio. Propellants are classified according to their state - liquid, solid, or hybrid. The gauge for rating the efficiency of rocket propellants is specific impulse, stated in seconds. Specific impulse indicates how many pounds (or kilograms) of thrust are obtained by the consumption of one pound (or kilogram) of propellant in one second. Specific impulse is characteristic of the type of propellant, however, its exact value will vary to some extent with the operating conditions and design of the rocket engine.
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Air-augmented rocket - Wikipedia, the free encyclopedia
Saved by uncleflo on September 2nd, 2014.
Air-augmented rockets (also known as rocket-ejector, ramrocket, ducted rocket, integral rocket/ramjets, or ejector ramjets) use the supersonic exhaust of some kind of rocket engine to further compress air collected by ram effect during flight to use as additional working mass, leading to greater effective thrust for any given amount of fuel than either the rocket or a ramjet alone. It represents a hybrid class of rocket/ramjet engines, similar to a ramjet, but able to give useful thrust from zero speed, and is also able in some cases to operate outside the atmosphere, with fuel efficiency not worse than both a comparable ramjet or rocket at every point.
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en/BrushlessCtrl - Wiki: MikroKopter.de
Saved by uncleflo on July 16th, 2014.
The Mikrokopter is powered by brushless motors. However, to use such motors the direct current of the batteries has to be converted to an triphasic alternating current) with power output controled so that the speed of the motors can be accurately controled.There are numerous brushless speed controlers available on the market. However very few are available which can fulfill the special requirements: We need brushless controlers which can accept a new throttle value very rapidly (< 0.5ms) and implement it. In addition the controler has to have an I2C bus interface.
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What is nuclear? / Molten Salt Reactors
Saved by uncleflo on February 26th, 2014.
Molten salt reactor schematic from GenIVMolten Salt Reactors (MSRs) are nuclear reactors that use a fluid fuel in the form of very hot fluoride or chloride salt instead of the solid fuel used in most reactors. Since the fuel salt is liquid, it can be both the fuel (producing the heat) and the coolant (transporting the heat to the power plant). There are many different types of MSRs, but the most talked about one is definitely the Liquid Fluoride Thorium Reactor (LFTR). This MSR has Thorium and Uranium dissolved in a fluoride salt and can get planet-scale amounts of energy out of our natural resources of Thorium minerals, much like a fast breeder can get large amounts of energy out of our Uranium minerals. There are also fast breeder fluoride MSRs that don’t use Th at all. And there are chloride salt based fast MSRs that are usually studied as nuclear waste-burners due to their extraordinary amount of very fast neutrons.
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SSD Cloud Server, VPS Server, Simple Cloud Hosting by DigitalOcean
Saved by uncleflo on September 12th, 2013.
We’ve created the fastest and most convenient cloud technology to help you easily and more efficiently manage your infrastructure so you can get back to coding. We provide all of our users with high-performance SSD Hard Drives, flexible API, and the ability to select to nearest data center location.
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Using Vegetable oil as a diesel fuel - introduction
Saved by uncleflo on July 14th, 2013.
A very clever man called Rudolf Diesel invented a new type of engine that operated at a higher compression ratio and didn't have spark plugs. The first thing that he noticed was that it was about 30% more efficient than a petrol engine and, also, he could run it on vegetable oil! Very quickly, the engine became adapted for use with fossil fuels since they were, and still are, very much cheaper than vegetable oil and Rudolf's second idea became forgotten.
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