Vojtěch Valda’s shipping container house runs on wind, solar and pulleys. He and his carpenter brother converted the 20-foot (6 meter) high cube into a transforming space for his family of four thanks to his transforming inventions like a retractable porch, table and bed.
His low-tech creations were inspired by the simplicity and reliability of the nautical world.Valda wanted to use a container because he could build it at his workshop and easily transport it to his off-grid site.
The house is equipped with solar panels, as well as a wind turbine, ensuring your batteries can be charged at all times of the day and all seasons. It is equipped with a refrigerator, water heater, and other 12 V and 24 V appliances according to your needs.
He built a wide roof for solar and to collect water for his 1000 liter tank. Valda and his wife documented the build process and sell the plans to other DIY builders./Kirsten Dirksen
The 296 GTB is the first Ferrari road car to sport a V6 turbo with a vee with an angle of 120° between the cylinder banks, coupled with a plug-in electric motor. This new V6 has been designed and engineered from a clean sheet by Ferrari’s engineers specifically for this installation and is the first Ferrari to feature the turbos installed inside the vee.
As the V6 turbo is integrated with an electric motor at the rear, the 296 GTB’s combined maximum power output is 830 cv, putting it at the top of the rear-wheel-drive sports car segment as well as making it extremely flexible.
This is true both in terms of day-to-day contexts (the 296 GTB has a full-electric mode range of 25 km), and in driving enjoyment (accelerator pedal response is instant and smooth at all engine speeds).
The powertrain assembly comprises a V6 turbo ICE, with the 8-speed DCT and E-Diff, and the MGU-K located between the engine and the gearbox. A clutch is set between the ICE and the electric motor to decouple them in electric-only eDrive mode. Lastly there is a high-voltage battery and the inverter which controls the electric motors./DPCcars
This off-the-grid tiny home on wheels is absolutely stunning. Designed to resemble a heritage style home, it’s been beautifully crafted and is packed full of clever design features. Built by husband and wife duo Cera and Oliver, this home has given the couple a brand new lease on life.
After purchasing a large home in town, Cera and Oliver found themselves in a position where they were constantly working to be able to sustain their lifestyle. With mortgage payments and home upkeep, they suddenly found themselves in a situation where they were no longer able to enjoy the things they used to love doing, such as getting out into nature and enjoying sports. That’s when the couple decided to downsize and build their dream tiny house on wheels.
The style of the home was inspired by their original heritage home in Armstrong, British Columbia. The shape, materials and colour all being borrowed from their previous dream home, to create a smaller version more appropriately sized to their lifestyle. The home was designed to be completely off the grid, allowing the couple to capitalise on the fact that their home is on wheels.
Opening it up to a wider variety of parking spaces and potentially even allowing them to travel in their home if they chose to. With Oliver having a background in Construction, and Cera a keen eye for design, the couple decided to share their new-found love of tiny house living by starting their own tiny house building company./Living Big In A Tiny House
In this video from the National Corvette Museum in Bowling Green Ky I check out the 1986 Chevrolet Corvette Indy Concept Car. One of the exhibits they have is on the development of the Mid Engine corvette. When Zora hit the scene He was sure that the mid engine design was the future of the American Sports car.
There were several different concept cars they built on the way to releasing the 2020 C8 mid engine Corvette this 1986 Indy Concept was one.It’s interesting to see the transformation of these cars.The National Corvette Museum is a very interesting place to visit.
It’s full of Automotive history. So even if the Chevrolet Corvette is not your dream car. There is still a lot of cool to see. This 1986 Chevrolet Corvette Indy Concept from the National Corvette Museum is one that I remember from the PPG posters back in the day.
It was cool to get to see it in real life. The way they went about the design back in the day seemed futuristic. How these features made it to market was completely different. Some cool Automotive history for sure./ScottieDTV
Over $1bn in Casitas “reserved” by over 20,000 potential customers in less than one year. Growing everyday. About 10% of these reservations include deposits paid, these customers have a potential of $100,000,000+ in revenue. System protected by 17+ patent filings and growing. Purchase orders totaling over $9mHuge social impact, potential to improve the quality of life for billions of people.
The only building system compatible with automobile style factory mass production. Isn’t it time we manufacture houses the way we manufacture everything else?Guided by Volkswagen Groups Porsche Consulting Inc. for the design and implementation of Boxabl’s new factory.Watch the video from the begining for more info:
Potential to disrupt a massive and outdated trillion dollar building construction market, starting with the rapidly growing USA Accessory Dwelling Unit market.Initial production facility of ~150,000 sq ft projected to produce 3000-5000 Casitas annually. Potential of $150,000,000 – $250,000,000 in revenues.
Plan for worldwide expansion using other people’s capital via a partner factory model. 100+ partners indicated interest in opening partner factories in almost every major countryA product engineered to build almost every building type in almost every country on the planet./Boxabl
The Magnetic Generator from Infinity SAV is complex system with an organized structural arrangement of permanent magnets and bifilar coils and PCB controller with a specially designed software that are used to generate and dispense electrical energy. Initial start is performed by a battery or any other external source of energy to help motor reach needed RPM.
After that the external source can be disconnected.The device is able to operate in autonomous mode and maintain its RPM regardless of amount of useful energy being consumed.The main components of the generator: an integrated stator; bifilar coils (mounted inside with the same and opposite poles); rotor with shaft; permanent magnets (installed with both poles to the outside); axles and bearings.The magnetic generator MG10 consists of 40 neodymium magnets and 40 bifilar coils.Watch the video from Infinity SAV:
The constructional feature that enables generating electrical energy is the precise angular alignment of the coils and magnets inside the drum and the switching regulations to suppress back EMF and effectively collect accumulated energy inside the electromagnets (coils). As a magnet starts approaching a coil, at a certain point the voltage of the coil increases along with the amount of charge it can transfer.
Once the switching regulator detects the maximum voltage of the coil, it switches off the coil. The magnetic field of the coil that has been formed after excitation of the coil will tend to collapse generating a back EMF in the coil windings.The designed software of the generator is able to suppress the parasitic current and transform it into usable electrical energy that can be utilized by the end user.via/read more: infinitysav
Total capacity 13050W Control system consumption 50W Motor consumption: Idle – 200W, full load – 3KW Generated voltage: 900 AC Generated frequency:400Hz Generated current:11.2A Effective power output:10KW Effective frequency output Effective voltage output: 220-230V / 1 phase / 50A 220-230V / 3 phase / 16A 380-440V / 3 phase / 16A
We use keys and locks all the time – but how do they work? There are many different kinds of locks but the most common is called a Pin Tumbler Lock.The pin tumbler lock is a lock mechanism that uses pins of varying lengths to prevent the lock from opening without the correct key.Pin tumblers are most commonly employed in cylinder locks, but may also be found in tubular pin tumbler locks.
The pin tumbler is commonly used in cylinder locks. In this type of lock, an outer casing has a cylindrical hole in which the plug is housed. To open the lock, the plug must rotate.The plug has a straight-shaped slot known as the keyway at one end to allow the key to enter the plug; the other end may have a cam or lever, which activates a mechanism to retract a locking bolt.
Above each key pin is a corresponding set of driver pins, which are spring-loaded. Simpler locks typically have only one driver pin for each key pin, but locks requiring multi-keyed entry, such as a group of locks having a master key, may have extra driver pins known as spacer pins. The outer casing has several vertical shafts, which hold the spring-loaded pins.
When the plug and outer casing are assembled, the pins are pushed down into the plug by the springs. The point where the plug and cylinder meet is called the shear point. With a key properly cut and inserted into the groove on the end of the plug, the pins will rise causing them to align exactly at the shear point. This allows the plug to rotate, thus opening the lock. /wikipedia
Compact DIY AC Air Cooler! Homemade AC! Produces very cold air with No Added Humidity (for an air conditioning “like” feel). Easy to make! The main parts are an aluminum ‘transmission cooler’ along with a 3.6w (12v) water pump and some 3/8″ ID clear vinyl tubing. you just assemble, add cold water and drop a fan in front (or behind) the fins. It blows super cold air. I tested with both low and high speed fans.
With ambient air temps in the 80s (28C) the unit produces air temps in the 50s (10C). Using only one gallon of cold water *from fridge (36F/2.22c) plus 2 ice paks you can get one to 2 hours of cooling! (for longer cooling times use extra ice or ice paks and/or an ice chest). *note: video footage of temp drop is shown at 3x speed. How it works: The cold water is circulated from the bucket through the piping and back to the bucket in a constant loop.
This transfers the ‘cold’ in the water to the fins in the radiator. The room air is then pulled (or pushed) through the fins (by the use of a small AC or DC desk fan) which cools down the exiting air. The fins themselves literally cool down in seconds (20 seconds after start up and they’re freezing).
The model i used was the 401 hayden transmission cooler – cost about $22.00 dollars. Note the unit is all aluminum so it is extremely lightweight (less than 1 pound), and the whole setup uses very little power. The AC fan uses as little as 9 watts and the DC pump is 3.6w so the whole unit runs on less than 15 watts! Note that 12v DC computer case fans (of the same physical size) only draw about 5 watts so then you can run the whole setup on less than 10 watts! For off grid use all you need is one 12v (10 watt or higher) solar panel and you’re set.via: desertsun02
The Aston Martin Valkyrie is the most extreme hypercar of all time! Join me for a ride onboard to get a sense of what happens when absolutely no compromises are made in the pursuit for performance. The V12 is spine tingling, the acceleration is insane, what a feeling!
Aston Martin’s ultimate hypercar is soon to head into production, with the development cars undergoing final testing, including this particular car, VP8 in full exposed carbon fibre. Powered by the Cosworth 6.5l V12 making 1,000hp with the support of a 160hp electric motor, and aerodynamics penned by Adrian Newey of Red Bull, while simultaneously carrying the absolute minimum weight possible, it’s a recipe for excitement. Watch the video by Shmee150:
And Valkyrie does not disappoint; with the engine rigidly mounted to the chassis, the scream of 11,000rpm all-encompassing and a raw experience unlike any other. The cabin is not spacious, it’s not supposed to be, and your heels are sitting above your hips after you’ve clambered in by standing on the seat pads themselves.
This car however is designed to elevate lap times to that of Formula 1 or LMP1, while meeting homologation standards and wearing street legal tyres… this shouldn’t be possible!However, if my first experience is anything to go by, the Valkyrie is unlikely to ever be superseded as the most extreme hypercar to grace our roads.//Shmee150
I built a water powered hammer called a “Monjolo”. I started by making a water spout from half a hollow log to direct water from the creek. This was set up in the creek and water flowed through it. The hammer was made from a fallen tree. I cut it to size by burning it at the points I wanted it cut (to save effort chopping).
Next I carved a trough in one end to catch falling water. This was done first with a stone chisel that was then hafted to an L–shaped handle and used as an adze. This adze only took about an hour to make as I already had the chisel head and cordage made of bark fibre to bind it with./ Primitive Technology
The water then emptied out of the trough (now slanting downwards) and the hammer then slammed down onto an anvil stone returning to its original position. The cycle then repeated at the approximate rate of one strike every 10 seconds. The hammer crushes small soft types of stone like sandstone or ochre. I carved a bowl into the anvil stone so that it would collect the powder. I then crushed old pottery (useful as grog for new pots) and charcoal.
Practically speaking, this hammer worked ok as a proof of concept but I might adjust it or make a new one with a larger trough and bigger hammer for heavy duty work.This is the first machine I’ve built using primitive technology that produces work without human effort. Falling water replaces human calories to perform a repetitive task.via/read more: Primitive Technology
At the end of the SR-71 spy plane program in the 90s, the US was left without a new spy plane to operate across the world. The SR72 is still decades away, and for the last 30 years, supposbly the military has flown blind. There are many reports of strange triangle aircraft flying high above military airbases, and across the world.
little is known about this plane, but it is estimated to fly at a top altitude of 135,000 feet (or possibly 110,000 feet), and cruising around 90,000 feet. At these altitudes the aircraft would have an incredible speed, easily pushing mach 6 and tearing across the sky. Watch the video from Found And Explained for more info:
To reach this pace, it would either have a ramjet or early scam jet like that propossed for the SR72, or it would have a very unquie propulsion called a Pulse Wave Detonation Engine.Its very different form normal engines. All regular jet engines and most rocket engines operate on the deflagration of fuel, that is, the rapid but subsonic combustion of fuel. The pulse detonation engine ioperates on the supersonic detonation of fuel.
If the aircraft had this engine, it would mean it could fly high enough to be out of range of any current anti-aircraft defenses, while offering range considerably greater than the SR-71, which required a massive tanker support fleet to use in operation.The auroras mission profile would be spying, used to bridge the gap between spy satalights and slower aircraft or drones.//via/read more: Found And Explained
A Korean company developed a product to reduce the harsh impacts of guardrails, and hopefully, save lives. The rolling Barrier redirects errant vehicle to the right direction by effectively absorbing impact energy with rollers, upper and lower rails (Impact-energy is converted into rotational energy).
When a car hits the guardrail, the rotating barrel converts shock from the vehicle to rotational energy. Upper and lower frames adjust tires of large and small vehicles to prevent the steering system from a functional loss.
The key to its effectiveness is the energy from an impact being absorbed and then deflected into the barrier and converted into rotational energy along the barrier.
This key lifesaving feature has enabled the barrier to perform exceptionally well in the stringent MASH testing, which additionally delivers its ability to survive moderate impacts and consequently require little or no repair or replacement.
The rollers are made from an ethyl vinyl acetate (EVA) material that is highly shock absorbent, a key design feature. This material is also said to be durable, long lasting and chemically resistant, while not suffering ageing due to UV exposure.
Dimension: L700W370H1000 (Span) Containment level: 100km/h Key Features
Easy installation and maintenance on curved road The high-elastic synthetic resin roller is hardly damaged by impact. (Cover: PE, Core: Urethane) Powder coating on rails with various colors is available upon request. Minimizes damage on motorists and vehicles with rollers and dual guardrails.///shindosafety
The Mercedes-Benz SLS AMG Roadster is a special high-performance supercar — but it’s the “forgotten” supercar of the Mercedes-Benz world. Today I’m reviewing the SLS and I’m going to show you all the quirks and features of the SLS Roadster. Then I’m going to get it out on the road and drive the SLS Roadster.
The SLS AMG Roadster is a convertible variant of the SLS AMG Coupé, with conventional doors and three-layered fabric soft top (having a magnesium, steel and aluminium construction) which opens and closes in 11 seconds, and can be operated on the move at up to 50 km/h (31 mph).
The 6.2-litre V8 engine based on the M156 block was modified to such an extent that AMG gave it a separate engine code—M159—to signify the more than 120 different modifications done to the engine as well as the addition of a dry-sump lubrication system to handle the car’s high cornering speeds.
Certain reinforcements were made to the roadster in order to compensate for the loss of roof which includes side skirts with greater wall thicknesses and more chambers, a dashboard cross-member is supported against the windscreen frame and centre tunnel by additional struts, a curved strut between the soft top and the tank reinforces the rear axle, a reinforcing cross-member behind the seats to support the fixed roll-over protection system./wikipedia
Wood shrinks and swells with changes in the relative humidity (the amount of moisture in the air relative to the temperature). When the relative humidity goes up, the wood absorbs some of this moisture and swells. When the relative humidity goes down, the wood loses moisture and shrinks. Since the average relative humidity in much of the world is lower in the winter than it is in the summer, wood tends to shrink each winter and swell each summer.
For your information On the average, the moisture content of wood changes l percent for every 5 percent change in the relative humidity.
This movement, although it may seem slight, is extremely important to woodworkers. To see why, try this experiment: Using waterproof glue, attach a small, narrow board to a wide one so the grain directions are perpendicular. Set this assembly outside on a rainy day and the boards will separate, despite the waterproof glue. As the wide board expands in the opposite direction of the narrow one, the joint is subjected to an increasing amount of shear stress. Eventually, it breaks. More joints fail from wood movement due to changes in moisture than from abuse and neglect. You must take this movement into account and accommodate it in your joinery. Wood moves in three planes, and it moves differently in each plane (SEE picture 1-9.) All three types of motion are relative to the direction of the wood grain and annual rings: • . Longitudinal movement is parallel to the wood gram. • Radial movement is perpendicular to the annual rings and to the wood grain. • Tangential movement is tangent to the annual rings and perpendicular to the wood grain. Wood is fairly stable longitudinally. An 8-foot-long spruce board will shrink less than 1 /16 inch along its entire length, from the time it’s cut “green” (and about as saturated with moisture as it will ever be) to the time it’s dried to 7 or 8 percent moisture content (dry enough for cabinetmaking and furniture making). Consequently, most woodworkers treat wood as if it were motionless along the grain. Across the grain, its a different story: Some woods may move up to 1/4 inch for every 1 foot of width or thickness. Furthermore, there is a big difference between radial and tangential movements. Most wood species will shrink or swell about twice as much tangent to the annual rings as perpendicular to them. “Tangential/Radial Movement of Common Wood Species” on the facing page compares the movement of several species along these different planes. As the ratio of tangential movement to radial movement becomes greater, it becomes increasingly important that you properly align the tangential and radial planes of adjoining parts. The disparity between radial and tangential movement causes yet another type of movement to consider as you choose the joinery Depending on how a board is sawed from a tree, it may deform as it shrinks and swells. For example, if the annual rings run from side to side in a square table leg, the leg may become rectangular as the wood shrinks faster from side to side than from front to back. If the rings run diagonally from comer to corner, the leg may shrink to a diamond shape. A round dowel becomes an oval as the wood shrinks, and a flat board cups in
1-10 Because the radial and tangential movement of wood is uneven, boards tend to deform as they go through an annual moisture cycle. The way a board will deform depends on how it is cut from the tree.
the opposite direction of the annual rings. (SEE FIGURE 1-10.) Sometimes you can use joinery to help control this deformation; other times you must simply plan for it. This is a lot to think about. Joinery would be far simpler if wood were the relatively stable building material that many beginning woodworkers take it to be. But it’s attention to details such as wood movement that marks the difference between a true craftsman and a novice. To properly join wood, not only must you plan a joint system that allows the wood to move, but you must also “read” the wood figure as you make each joint. Study each board, then orient the grain and the rings so the anticipated movement creates the least possible stress on the joint. There are several simple joinery techniques that help reduce stress and/or control deformation caused by wood movement. Use those techniques that apply to the structure of your project.
Try this trick.
To help visualize the wood movement in a joint, sketch the boards as they will be assembled, showing the wood grain and annual rings. Mark each board with a small arrow to indicate radial movement and a large arrow to indicate tangential movement. Try to orient the wood figure so the large arrows are all parallel.
Orient the wood figure to make each part as stable as possible. Since the longitudinal plane of a board is the most stable, align this plane with the longest dimension (the length). Align the radial plane with the next longest dimension (the width), and the tangential plane with the shortest dimension (the thickness). This may not always be possible, since most boards are “plain-sawn” from logs so the tangential
plane is aligned with the width. If the alignment of the tangential and radial planes is critical, you may have to pay a premium price for “quarter-sawn” lumber, in which the radial plane is aligned with the width. Or you can rip a board into narrow strips and glue it back together with the rings properly aligned. (SEE FIGURE 1-11.)
I -II Usually, the larger the board, the more critical it is that the longitudinal, radial, and tangential planes all be aligned for maximum stability. This is why furnituremakers glue up “butcher block” table tops from narrow strips. Notice that each strip has been turned so the annual rings run top to bottom. The radial plane of each strip is aligned with the width of the table top. The tangential plane – the most unstable dimension of each strip- is aligned with the thickness, where stability matters least
Orient the wood figure so the parts move m unison Whenever poss1ble, join the boards so the wood swells and shrinks in the same direction When the wood gram must cross at right angles, align the tangential planes. (SI·E FIGURES 1-12 AND 1-13.) Cut large boards into smaller parts. When you must glue or otherwise fasten two boards With opposing wood gram, make sure they are as narrow as possible Without compromising the strength of the structure. (SI·E FIGURJ·S 1-14 AND 1-15.)
1-12 On the comer butt joint shown at the left, both the wood grain and the annual rings are opposed to one another. The joint will soon fat I. On the middle joint, the wood grain is aligned, but the annual rings are not – the tangential planes are perpendicular to one another. This joint wlll fail too, though not as quickly as the first. On the joint at the right, both the wood grain and the annual rings are properly aligned. This joint will last for a long time.
1-13 The wood grain on all three of these mortise-and-tenon joints is properly aligned. But on the joint at the left, the tangential planes are directly opposed on the broadest possible surface- where the cheeks of the tenon meet the sides of the mortise. This greatly diminishes the useful life of the joint. On the joint in the middle, the planes are in some-Couto Be BETTER planes are perpendicular to one another. This joint will fail too, though not as quickly as the first. On the joint at the right, both the wood grain and the annual rings are properly aligned. This joint will last for a long time. what better alignment. The tenon moves radially at right angles to the tangential movement of the mortise. But the joint at the right shows the best possible arrangement- the tenon moves radially at right angles to the radial movement of the mortise, and the tangential planes are aligned.
Now that you know the basic types of joinery, how do you choose the right joint for a particular woodworking job? Consider that every joint must fulfill two important requirements: • It must support the load of the other parts and any external weights or forces that might be applied to the completed project. • It must let the wood move as it expands and contracts with changes in temperature and humidity. And if the joint is to be glued or fastened, as most are, there is a third requirement: • It must provide a suitable gluing surface or anchor for a fastener. Use whichever joint best fulfills these requirements. SUPPORT THE LOAD The parts of a woodworking project are elements of what engineers call a “stress system.” Each joint must withstand a certain amount of stress pushing or pulling at the members of the joint. This stress comes from many different sources. It could be external (coming from outside the structure); for example, when you sit on a chair, your weight stresses the chair joints. If you scoot the chair across the floor, the friction between the floor and the chair legs creates stress. Or the stress could be an internal factor, inherent to the structure. The tension in a woven seat, for example, stresses the joints between the rails and the legs. Even the weight of the individual chair pans, no matter how small or light they may be, is an internal stress to be reckoned with. There are four types of stress, categorized by the direction of the force relative to the joint (SEE FIGURE 1-3): • Tension pulls the members of a joint apart. • Compression squeezes the members together. • Shear pushes the members in opposite directions. The lines of force are parallel, but not aligned as they are with tension and compression. • Racking (or bending) rotates the members around one another.
Even before they’ve been glued or fastened, fitted joints resist one or more types of stress. (SEE FIGURE 1-4.) After they’re assembled, they resist all types to a greater or lesser degree. When choosing a joint, try to pick one that will withstand the anticipated stress without glue or fasteners. That way, if the glue bond or the hardware fails, the joint will stay together
Fore your information Of the four types of stress, racking is the most destructive. A racking force bends the members of a joint like levers. A lever, as you know, will move a heavy object when you apply a relatively small force- the force is multiplied by the pivoting action of the lever. For this reason, a small amount of racking will pop a joint that might otherwise withstand large amounts of tension, compression, or shear.
For most woodworking projects, however, you must do more than pick a joint or two. You must design an entire system of joints- this is what a structure is. To build a structure, you must determine not only the types of joints in it but also their size and location relative to each other. This isn’t difficult; it just takes some thought. There are a few simple commonsense methods for designing a strong, durable structure:
1-3 Four types of stress may tear a wood joint apart – tension, compression, shear, and raching. Of these, racking is the most destructive. • Use larger joints and structural members. This distributes the load over a larger area and larger mass. (SEE FIGURE 1-5.) • Use smaller members, but more of them. This too increases the area and mass that supports the load. (SEE fiGURE 1-6.) • Triangulate the members. Rearrange the structural members or add new members, braces, glue joints, or fasteners to create structural triangles. When a triangle is fastened at all three comers, it~ very rigid. This is why engineers triangulate bridges and roof trusses. (SEE FIGURE 1-7.) • Orient the wood grain properly; wood is always strongest parallel to the grain. A tenon or dovetail cut across the grain will soon break. • Increase the glue surface in a joint by making the fitted surfaces more intricate. (SEE FIGURE 1-8.) • Increase the size or the number of fasteners. • Use both glue and fasteners.
I -4 Even before a butt joint is glued or fastened, it will withstand compression, but any amount of tension, shear, or racking will pull it apart. A monise-and-tenon joint, on the other hand, will resist compression, shear, and racking. Only tension can pull it apart before it’s secured.
1-5 The racking force applied to both of these mortise-and-tenon joints is equal. But on the large mortise and tenon (bottom), the load is distributed over a larger area and more mass. The stress at any one point in the joint is a good deal less than that on the smaller mortise and tenon (top).
l-6 You don’t have to use massive structural members or joints to support a large load. On this Shaker rocker, the load is distributed over many small, round mortise-andtenon joints. The chair’s frame and joinery appear very delicate, yet it has survived constant use for almost two centuries .
l-7 Structural triangles don’t all have to look like roof trusses. On a table, the upper part of the leg and the apron form a hidden triangle that keeps the structure rigid. On a board-and-batten door, the nails form triangles that keep the door square.
1-8 The adjoining members of both the butt joint (left) and the box joint (right) are precisely the same size. However, the fitted fingers of the box joint offer more gluing surface than the fiat surfaces of the butt joint. Consequently, the box joint is much stronger.
1-9 Wood moves in three different planes- longitudinal, or parallel to the wood grain, radial, or perpendicular to the annual rings, and tangential, or tangent to the annual rings. Wood is fairly stable longitudinally – it will only shrink or swell .1 percent of its length when originally cut. However, it’s unstable radially and tangentially. Furthermore, the tangential movement in mos t woods is about rwice the radial movement. Radial movement averages 4 percent (of the original cut dimension) and tangential movement averages 8 percent.
Boards can be joined in three different ways: • Fitting joins the mating surfaces of the parts with no gaps or openings. The boards are cut to fit one another. These cuts can be as simple as those in a butt joint or as intricate as the tails and pins of a dovetail joint. • Gluing bonds two boards with a chemical adhesive, such as animal hide glue, aliphatic resin (yellow) glue, or epoxy • Fastening secures one board to another with wood or metal fasteners, such as pegs, nails, and screws. To make most wood joints, you must combine two or more of these basic operations. For example, you might fit a simple butt joint and reinforce it with nails. Dovetail joints are typically fitted and glued. And a few joints, such as a pegged mortise and tenon, combine all three activities- fitting, gluing, and fastening. (SEE FIGURE 1-1.)
FOUR WAYS TO FIT Of these three operations, however, fitting is the most essentiaL You can join wood without glue or nails, but not without fitting. Even a simple butt joint requires that you cut one board to fit flush against the surface of another. Gluing and fastening are important
and I’ll refer to them from time to time- but fitting is the essence of joinery. Most of this text focuses on how to fit four basic types of joints (SEE FIGURE 1-2): • Simple joints, such as dadoes and rabbets, require only a few simple cuts to assemble two parts. • Reinforced joints use a secondary piece of wood, such as a dowel or spline, to strengthen the joint between two or more principal parts. • Mortise-and-tenon joints have one pan that is bored or recessed to hold a second part, and are mostly used to join the parts of a frame. • Interlockingjoints use multiple cuts to increase the adjoining surface area, and usually join the parts of a box.
1-1 Most woodworking joints combine two joining operations – either fitting and fastening, as with the nailed butt joint (l), or fitting and gluing, as with the dovetail joint (2). Some combine all three, such as the pegged mortise-and-tenon joint (3)- it’s fined, fastened , and glued. Note that all of these joints require some degree of fitting. just as joinery is the heart of woodworking, fitting is the heart of joinery.
1-2 Although there are hundreds of fitted joints, they can all be organized into four categories – simple joints (1) such as the rabbetand- dado joint, reinforced joints (2) such as the dowel joint, mortise-andtenon joints (3) such as the haunched mortise and tenon, and interlocking joints ( 4) such as the through-dovetail join
Ground neutral and hot wires explained. In this video we look at the difference and purpose of the ground wire, the hot wire and the neutral wire in a north american residential electrical system. We look at ground faults, GFCI, current, voltage and simple examples for each.
Ground and neutral are circuit conductors used in alternating current electrical systems. The ground circuit is connected to earth, and neutral circuit is usually connected to ground. As the neutral point of an electrical supply system is often connected to earth ground, ground and neutral are closely related. Watch the video from The Engineering Mindset for more info:
Under certain conditions, a conductor used to connect to a system neutral is also used for grounding (earthing) of equipment and structures.Current carried on a grounding conductor can result in objectionable or dangerous voltages appearing on equipment enclosures.
So the installation of grounding conductors and neutral conductors is carefully defined in electrical regulations. Where a neutral conductor is used also to connect equipment enclosures to earth, care must be taken that the neutral conductor never rises to a high voltage with respect to local ground./wikipedia
The brand new Ferrari 296 GTB is certainly shaping up the market with extraordinary technology and performance from the new 3.0l V6 hybrid with 830hp. This car also features the new Assetto Fiorano, and we can explore it in detail to see what it’s all about!
The Ferrari 296 GTB is named after the 2.992cc V6 engine and Gran Turismo Berlinetta, with the engine and motor producing 663hp and 167hp respectively for a total output of 830hp and 740Nm to the rear wheels with the new 8 speed DCT gearbox. Visually it features nods to the 246 Dino, 250 LM and more classic Ferraris, with the distinct livery that then arrives with the Fiorano Pack.Shmee150
Onboard it brings in the 16″ curved dashboard display, touch control steering wheel, the traditional looking gear selector, new Ferrari key and many more great details.
This particular example being the Assetto Fiorano also saves weight with more use of carbon fibre, a lexan rear window, and offers a specific set of Multimatic shock absorbers for a more track orientated drive. In addition to that, it also has the optional painted livery that’s seen here in Grigio Ferro with Giallo Modena stripes./Shmee150
I try and burn a Model rocket engine submerged in liquid nitrogen to see what’s going to happen, also filming with a 4k high speed ( slow motion ) camera it should yield some interesting results.
Model rockets are cool and in this case very cool, -320 °F cool, How does this work ?, lets find out.I build a couple different rigs to see if I can get a clear view of the engine for our high speed camera and see what the high speed footage reveals.
Watching the video experiment from Warped Perception you’re going to see something another that is sparked by curiosity.The rocket engine can fire underwater or even in liquid nitrogen because it makes its own oxygen.
The precise mixture of chemicals means that a rocket engine will burn exactly the same anywhere, even in the vacuum of space.In this video, you wont witness one awesome explosion, but two, making it a really exceptional video.The sudden force of the model rockets ejection charge was proved to be too much./Warped Perception
Project Heaviside is Kitty Hawk’s latest high-performance electric VTOL vehicle. It is designed to be fast, small and exceedingly quiet. Video shows November 2019 flight test footage from Northern California test site.Heaviside is equipped with a custom aircraft recovery parachute as a supplemental safety system.
Through hundreds of test flights, Heaviside continues to prove exceptional handling of single-system faults common-mode failures.100 miles demonstrated on a single charge.Designed to surpass the electric vehicles standards of efficiency, Heaviside uses less than half the energy per mile of travel than a Tesla Model S, at faster speeds.
Heaviside can take off and land in a 30 foot by 30 foot area that does not need to be paved. Through modern integrations of propellers and propulsion units, Heaviside meets and exceeds all criteria for efficiency without burning any fossil fuels on board.
Americans drive an average of 29 miles daily, making Heaviside’s 100 mile demonstrated range and 180 mph speed especially capable of getting people where they need to go, while maintaining reserves for alternate landings.
By delivering on every facet of its promised performance, Heaviside represents the largest achievement in demonstrated range and speed in the entire eVTOL market. Heaviside performed over 237 successful transitions from hover to forward flight mode and back, all while maintaining ¼ of the battery charge in reserves.