[casafear1] has put out this video detailing how to build the “ground-breaker”, a zombie escaping from the grave. It is a simple frame for the arms and shoulders, with a couple pneumatic pistons to make it jerk as though it were pulling itself from the grave. He goes into a decent amount of detail explaining the physical construction, offering several tips to prolong the life of this prop. Unfortunately, he doesn’t enlighten us as to his control scheme. Is it manually controlled? Is it automated? Does it get activated by passers by or is it always going?
Last year,…

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The engine is the heart of your car, but instead of pumpingblood, the engine pumps air and fuel. The engines main functionis to convert air and fuel into rotary motion so it can drivethe wheels of the car. How does it do that ??…. Well let’sstart with a cutaway of the engine and see all the major partsthen we will get into the actual mechanics. Pistons: Most commonengines have , , or pistons, which move up and down in thecylinders. On the upper side of the piston is what is called thecombustion chamber where the fuel and air mix before…

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What is a -stroke diesel engine?As the name suggests, these engines work on reciprocatingactions of pistons. One stroke means one linear motion of thepiston in one direction. When the piston moves in the oppositedirection, that is counted as another stroke.For a -stroke engine, the piston has to move up, then down,then up again, and then down again to complete one cycle of theengine. In that stroke of the piston, the crankshaft will haveturned revolutions.The strokes of the piston is to complete stages of thecombustion cycle. As you might have known, in order for a fireor explosion to occur to…

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