An animation of the final product.
Showing posts with label Ramazani Milongo. Show all posts
Showing posts with label Ramazani Milongo. Show all posts
Thursday, 29 April 2010
Saturday, 24 April 2010
Friday, 23 April 2010
Predict Advantages.
. It should be cheaper as it will be used by countries people with small budgets after disaster.
. It would be moved easily by just a Land rover in its roof rack.
. We do not need the electrical or hydraulic power to use it as it will be used in a desaster environment.
. It can be manipulate easily by hand by 2 or 4 people.
. It will be used mostly over rough terrain.
. It will be strong as it is manufactured in metal (Carbon steel and Aluminium).
. It will load a minimum of 1000kg for about 4 m of distance.
. It should be easy to maintain or repair.
. It would be moved easily by just a Land rover in its roof rack.
. We do not need the electrical or hydraulic power to use it as it will be used in a desaster environment.
. It can be manipulate easily by hand by 2 or 4 people.
. It will be used mostly over rough terrain.
. It will be strong as it is manufactured in metal (Carbon steel and Aluminium).
. It will load a minimum of 1000kg for about 4 m of distance.
. It should be easy to maintain or repair.
Choosing a winch
In order to ensure the correct winch selection and correct method of use, we have to take in account somes criterias:
faillure to select correct winch and incorrect operation can potentially reduce the life cycle of our winch and result in premature faillure.
Winches used under certain conditions i.e. Salvage, recovery and off road applications will require a winch high rated winch than that of less frequently used winch.
selection of winch capacity for loading needs to be careffuly considered. It should be powerful enough to pull our charge overcoming the resistance caused by obstacles such as moving gradients, mud, sand or stone.
When choosing a winch we should know the maximum effort that the winch can exert on a single line on the first layer of the winch drum.As the layers of cable build up on the winch drum, the overall cable speed increases, however the rated line pull decreases at the same rate.
I think by using snatch block to obtain a double line pull we can in effect almost double the pulling capacity of our winch, whilst approximately halving the overall recovery speed.
faillure to select correct winch and incorrect operation can potentially reduce the life cycle of our winch and result in premature faillure.
Winches used under certain conditions i.e. Salvage, recovery and off road applications will require a winch high rated winch than that of less frequently used winch.
selection of winch capacity for loading needs to be careffuly considered. It should be powerful enough to pull our charge overcoming the resistance caused by obstacles such as moving gradients, mud, sand or stone.
When choosing a winch we should know the maximum effort that the winch can exert on a single line on the first layer of the winch drum.As the layers of cable build up on the winch drum, the overall cable speed increases, however the rated line pull decreases at the same rate.
I think by using snatch block to obtain a double line pull we can in effect almost double the pulling capacity of our winch, whilst approximately halving the overall recovery speed.
Tuesday, 23 March 2010
MATERIALS
The materials used to manufacture the crane must be strong and resist at the friction and the pressure due to the load.
We have to look for the density, the tensile strength, the yield strength, and the young's modulus of differente materials to help choose which are suitable.
After research we found that Aluminium and Steel are most common materials that can be used in our purpose because of their advantages.
Aluminium: is the most abundant metal to be found in the nature. It is relatively low weigth. Good resistance to corrosion, Good thermal and electrical conductivity. It can be melted, cast, formaed and machined easely.
Young's modulus, 69 GPa
Yield strength, 55 MPa
Tensile strength, 125 MPa
Density, 2.7 Kg/m^3.
Steel:
Low carbon steel( Mild steel) is the most commonly used, readly welded construction material, and has the following typical mechanical properties:
Density, 7.85 Kg/m^3
Yield strength, 250 MPa
Young's modulus, beteen 190 and 210 GPa
Tensile strength, 280 MPa
We have to look for the density, the tensile strength, the yield strength, and the young's modulus of differente materials to help choose which are suitable.
After research we found that Aluminium and Steel are most common materials that can be used in our purpose because of their advantages.
Aluminium: is the most abundant metal to be found in the nature. It is relatively low weigth. Good resistance to corrosion, Good thermal and electrical conductivity. It can be melted, cast, formaed and machined easely.
Young's modulus, 69 GPa
Yield strength, 55 MPa
Tensile strength, 125 MPa
Density, 2.7 Kg/m^3.
Steel:
Low carbon steel( Mild steel) is the most commonly used, readly welded construction material, and has the following typical mechanical properties:
Density, 7.85 Kg/m^3
Yield strength, 250 MPa
Young's modulus, beteen 190 and 210 GPa
Tensile strength, 280 MPa
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