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Wind turbines. Enough to supply about 10.000 kWh or 10 MWh annually. "We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It's a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary." - MUCH cheaper. Just one foot. Designed to give to higher windspeeds, possibly by using a semi-flexible foot.
HHO Generator - Water to Fuel Converter
Splicing water bottles. For storing compressed oxygen to be used with ethanol/aluminium powder gas jet burner/furnace. Either this or a used propane tank.

Science

5 Pins
a table with a water heater on top of it next to a hose and some other equipment
mywoodworkingsite.com
DIY vacuum chamber (a concrete cylinder with a couple of layers of glass for a window covering the top. Could also be used as a high-pressure chamber, if weight is added to the glass window.
an image of a vacuum pump with the words gravity powered vacuum pump on it's side
Sprengel Vacuum Pump: The most efficient vacuum pump ever?
Sprengel Vacuum Pump: The most efficient pump ever?
a white wind turbine sitting on top of a dry grass field
50 Watt DIY Small Wind Turbine Kit
Wind turbines. Enough to supply about 10.000 kWh or 10 MWh annually. "We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It's a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary." - MUCH cheaper. Just one foot. Designed to give to higher windspeeds, possibly by using a semi-flexible foot.
a person is using a water filterer to make fuel from water
HHO Generator - Water to Fuel Converter
HHO Generator - Water to Fuel Converter
there is a bottle that has been placed on the tree next to some water and trees
Pressure Test 200PSI (14Bar) Water Rocket Spliced Bottles
Splicing water bottles. For storing compressed oxygen to be used with ethanol/aluminium powder gas jet burner/furnace. Either this or a used propane tank.
how to make an electric arc furnace in the shape of a block of cement with flame coming from it
How To Make An Electrical Arc Furnace
Electric furnace. Completely sealed/no heat loss due to air movement. Anaerobic atmosphere to avoid combustion.
two lines are connected to each other with arrows pointing up at the top and bottom
Primitive steam engine provides work, thus freeing up workers and reducing need for draft animals. The goal of any society is to minimize the number of people occupied with manual labour and maximizing the number of skilled craftsmen/artisans, scientists, artists etc.
a hand is holding a plastic object in front of a fish tank with water inside
How to Build an Acrylic Aquarium: 11 Steps (with Pictures)
How to Build an Acrylic Aquarium: 11 Steps (with Pictures)
Hydraulic robot arm. Replace the manual input with (electric motors, threaded rods and polarity reversing switches) and you can do it all using buttons, not levers (this allows greater distance between robot and operator). Mechanical advantage would have to be derived from the gear ratio. This would allow much more precise work too. Achieving a 360-degree rotation from linear movement: 2 gears where half rotation from big gear = 1 full rotation of small gear. Diy Projects, Ideas, Steam Projects, Projects, Cardboard, Projects To Try, Cardboard Robot
Hydraulic robot arm. Replace the manual input with (electric motors, threaded rods and polarity reversing switches) and you can do it all using buttons, not levers (this allows greater distance between robot and operator). Mechanical advantage would have to be derived from the gear ratio. This would allow much more precise work too. Achieving a 360-degree rotation from linear movement: 2 gears where half rotation from big gear = 1 full rotation of small gear.
welder working on an electronic device with flame coming out of the top and bottom
ETHANOL gas jet burner. A can with small hole in top & with a syringe needle placed over the hole. Can is filled with ethanol/veggie oil & placed on hot coals. Ethanol/oil vapors then ignited. Can is insulated. Smaller syringe inside bigger one delivers oxygen (preheated). Let air inside when can is cooling down to prevent implosion & let fuel "boil" for some time before igniting it to prevent explosion. For welding: a stoichiometric fuel/oxygen mix. For cutting metal: "too much oxygen" mix.
a person holding a lighter in their hand with the words, 22n o c on it
Superpowerful Flame 5072 ℉ • Produce Hydrogen from Water - Do it yourself
Superpowerful Flame 5072 ℉ • Produce Hydrogen from Water - Do it yourself
the gears are labeled in red and orange arrows pointing towards each other, with text describing how they work
Sliding mesh transmission.
a machine that is sitting on top of a wooden table in a room filled with tools
Homemade bench vise, using a bolt and matching nut. A vise requires two hard surfaces. One surface can be installed on top of the nut, whereas the other surface attaches to the bolt further away, specifically by having the bolt go through a drilled hole in the "surface" and a washer on the other side to allow the bolt free movement/rotation while simultaneously making that rotation force this 2nd surface closer to the first one on top of the nut. Bolt can be a lot shorter and thinner.
a man is holding up a sand casting in front of him and the words diy green sand for casting
DIY GREEN SAND FOR CASTING - CHEAP, SIMPLE and FAST - MSFN
DIY GREEN SAND FOR CASTING - CHEAP, SIMPLE and FAST - MSFN