working of a magnetic crane?
156933
Simple- Just a very large electromagnet on the end of a standard crane's lift cable.
140612
Yep.  A fan will do the trick, or if it's a vehicle used for a specific purpose (like carrying something from set point A to set point B) a pulley system would work.  I don't know the exact equations involved, but the fan's windpower strength should be (obviously) greater than the mass of the vehicle, and should have some kind of failsafe cutoff switch as well as a means to decrease power to the fan, for (again, obviously) safety reasons.
805479
Get two pieces of iron block. Turn a coil round one of them. Pass electric current through the one which has the coil turned round it. This will make the coiled piece of iron act like a magnet and will attract the other piece of iron. And you have made an electromagnet.
252925
The two simplest pulley systems demonstrate the principles of their operation.  First if there is a single pulley overhead and you pull down to lift a load, you must pull with the same force as the weight of the load because oonly one rope pulls up on the load.  100 pound load = 100 pound pull.\n\nSecond, if the load is below you and you pull up on a rope connected to your own level through a pulley, you pull with a force one half the weight of the load because two ropes are pulling now up on the load.  100 pound load = 50 pounds pull + 50 pounds on fixed rope.\n\nThe overhead pulley required you to pull the rope say 10 feet to lift the load 10 feet; but the pulley below you required you to pull the rope 20 feet to lift the load 10 feet.\n\nYou can calculate more complicated pulley systems either by counting the number of ropes that are under tension that actually lift the load and dividing the load by that number or you can determine the length of rope you must pull to raise the load a given distance and use that ratio to determine your force vs the load weight.  you can do this by making sketches rather than actually setting up real pulleys, ropes and loads.  Good luck.
1091575
This is strictly a question for an experienced rigging contractor. There is a lot more to the question than just what cranes you are using. \n\nI have been involved in the lifting of many large vessels up to 150 foot in length and over 600,000 lbs. If you have to ask questions like the above, you have no business even involved in such a project. There are many contractors who are experienced in doing the kind of work you are asking about. \n\nI would not undertake such a job without some very experienced folks taking the lead.
602162
that's a very difficult project to complete, really you should research full size maglev and then just decrease the scale, the complexity will remain the same though.
505538
A mag-levs route is lined with magnets and they use the polarity to move -- almost like a model or toy train; except this is done with magnets. They don't come in contact with anything though they do have retractable rubber wheels but those aren't used when they are moving.\n\nEDIT: P.S. Aproov -- anyone can copy and paste...\n\nThere's more info in the below link:
788485
Magnetic levitation, maglev, or magnetic suspension is a method by which an object is suspended above another object with no support other than magnetic fields. The electromagnetic force is used to counteract the effects of the gravitational force.\n\nStability\nEarnshaw's theorem proved conclusively that it is not possible to stably levitate using static, macroscopic, "classical" electromagnetic fields. The forces acting on an object in any combination of gravitational, electrostatic, and magnetostatic fields will make the object's position unstable. However, several possibilities exist to make levitation viable, by violating the assumptions of the theorem — for example, the use of electronic stabilization or diamagnetic materials.\n\n Methods\nThere are several methods to obtain magnetic levitation. The primary ones used in maglev trains are servo-stabilized electromagnetic suspension (EMS), electrodynamic suspension (EDS), and Inductrack.\n\n\ntry wikipedia or www.oz.net
336860
Mag inspection utilizes the phenomenon of ' magnetic lines of force' to indicate flaws in metal castings or machinings.\n\nThis only works with pieces made of ' magnetic' material, such as Iron, steel. ( Stainless and aluminum will NOT work ). \n\nA fine powder of Iron Oxide is sprinkled liberally on the piece to be inspected.  A strong magnetic field is applied from a coil.  If a crack or void exists, the uniform lines of magnetic force will be ' distorted' around the flaw, making the Iron Oxide gather in that area.  The area can then be marked with a grease pen, and analyzed for quality control, rejected, or repaired.
1142672
A few magnets will do the trick.... even a really large scientific one.
1011022
Safe Working Load of a crane.
1148481
it is a type of Machinery.
433870
make and working elctric circuit like a bell, r a bulb, u can Also explain working of an electromagnet using a model.\nu can also expain the capillarity concept
110961
you could sew flexible magnets into fabric. You may even be able to mount magnets into fabric like you would a button.  \n\nOK I GOTTA ASK... What are you making?
1054406
And just how do you propose I put a diagram on Y!A?\n\nNonetheless, electricity can be used to generate electricity, as mentioned.  Put three magnets around a rotating shaft & you get 3Φ electricity.\n\nMagnets work in compasses to help a person find direction.\n\nMagnets can be used to hold cabinet doors closed.\n\nMagnets can be used to lift things (like in a junkyard to move vehicles to a compactor), or to remotely move magnetic items (like if you can't reach your car keys, you could retrieve them with a strong enough magnet).
920912
Magnetization of materials\n\nFerromagnetic materials can be magnetized in the following ways:\n\n* Placing the item in an external magnetic field will result in the item retaining some of the magnetism on removal. Vibration has been shown to increase the effect. Ferrous materials aligned with the earth's magnetic field and which are subject to vibration (e.g. frame of a conveyor) have been shown to acquire significant residual magnetism.\n    \n* Placing the item in a solenoid with a direct current passing through it.\n    \n* Stroking - An existing magnet is moved from one end of the item to the other repeatedly in the same direction.\n    \n* Placing a steel bar in a magnetic field, then heating it to a high temperature and then finally hammering it as it cools. This can be done by laying the magnet in a North-South direction in the Earth's magnetic field. In this case, the magnet is not very strong but the effect is permanent.\nMagnetization of materials\n\nFerromagnetic materials can be magnetized in the following ways:\n\n* Placing the item in an external magnetic field will result in the item retaining some of the magnetism on removal. Vibration has been shown to increase the effect. Ferrous materials aligned with the earth's magnetic field and which are subject to vibration (e.g. frame of a conveyor) have been shown to acquire significant residual magnetism.\n    \n* Placing the item in a solenoid with a direct current passing through it.\n    \n* Stroking - An existing magnet is moved from one end of the item to the other repeatedly in the same direction.\n    \n* Placing a steel bar in a magnetic field, then heating it to a high temperature and then finally hammering it as it cools. This can be done by laying the magnet in a North-South direction in the Earth's magnetic field. In this case, the magnet is not very strong but the effect is permanent.
1070945
if it is a mass produced crane, look up the manufacturer's number and call them up to request the info or do your best to research it online. if it is some kind of home-made or one-off crane you are SOL unless you can come up with the math and physics to figure it out. which is a whole other question.