Re: Science Project

[GagiMunjiza]

Hello again forum. I have yet another final project for my physics and this time I must construct a wind powered crane. The rules are: You must build a wind-powered crane that will lift as much mass possible and be as light as possible. The crane is the entire machine, the mass is the object you lift and the gripper( part that holds the mass) must stay attached to crane. Any material can be used for the mass. A high efficiency fan will be placed 1m away and the crane must be 1m x1m x1m in dimension. Also the mass must lift to at least 50cm above ground and drop on its own (No external force).

We will be marked as follows: 100X Weight lifted/(weight of crane+0.100kg. Thanks for your support :)

[belovelife]

http://en.wikipedia.org/wiki/Turby_wind_turbine

 

 

 

i'd try to make these the struvture of the frame, and have then all spin one generator, more power to the gearbox that way i think, unless its just driven by the spin, itself, still more torque i think

[Turtle]

Hello again forum. I have yet another final project for my physics and this time I must construct a wind powered crane. The rules are: You must build a wind-powered crane that will lift as much mass possible and be as light as possible. The crane is the entire machine, the mass is the object you lift and the gripper( part that holds the mass) must stay attached to crane. Any material can be used for the mass. A high efficiency fan will be placed 1m away and the crane must be 1m x1m x1m in dimension. Also the mass must lift to at least 50cm above ground and drop on its own (No external force).

We will be marked as follows: 100X Weight lifted/(weight of crane+0.100kg. Thanks for your support :)

 

hello again bob. hope i'm not too late. when is the project due?

 

 

rather than a complex design like belovelife suggested, i'd stay with the very simple blade style of the water pumping windmill seen on farms in the US and elsewhere. since your "wind" will come from only 1 direction you have no need of a blade style or other apparatus to keep your mill pointed into the wind. here's an illustration and a link with some good info for you. >>

 

wind power

 

the link has an illustration of the gear box, though your specific design will not need the oscillation of a water pumping mill. rather than gears i think you can rig pulleys to get the same mechanical advantage. EDIT: PS looking at the gear box illustration i get an estimated gear ratio of 3 to 1. so the pulley diameter on the wind mill axle would be 3x the diameter of the pulley on the axle that wraps up the lifting line.

 

let's see...what else? oh; when the weight is dropped, is the lifting line supposed to detach, or can it remain attached to the weight?

 

besides all that, i have an idea (as if. :lol:) for an addition that might up your power. this would be to put a shroud [say duct] around the mill blades to contain the incoming wind. again, because your "wind" is only coming from 1 direction this addition has no moving parts. picture the blades inside a short-but-wide hollow tube. (ducted fans are usually used in propulsion, but your project suggest this reverse use to me. )

 

here's a wiki image of ducted fans on a blimp.

 

guess that's good for now. i'll try and check back soon & good luck.

Edited June 1, 2012 by Turtle