Crane Definition and 133 Threads

I bought this truck crane for my dad. I want to calculate the mechanical advantage of it. http://www.harborfreight.com/1-2-half-ton-capacity-pickup-truck-crane-1647.html I know how to calculate the mechanical advantage of a hydraulic jack and of a lever but I am not sure about where...

Hi As an assignment for uni, we had to design and build a derrick crane. After having designed it on catia, I've realized i haven't made any tolerances for any of the holes. All the holes are 8mm and 6mm diameter, but i don't know what tolerance limits I should put, as we built the crane...

i am working on a project of 450t eot crane project for final year. want detail on hoists and motor used for hoist. how i choose it?

A crane uses a force of 2.3 x 103 N of force to lift a steel ball 32.0 m in 1300 s, calculate the power of the crane. Would i use the equation: p=force x displacement /time (2.3x10^3n)(32m)/1300s?

Hi, i was just wondering with this question because I'm unsure if I am supposed to add both kinetic and gravitation energy into this answer? thanks. 1 A crane on a building site lifts an 8.00 × 102 kg load from ground level to a vertical height of 90.0 m at a constant speed of 2.00 m s–1...

A crane lifts the 18,000kg steel hull of a ship out of the water. The density of steel is known to be 7.8 x 103 kg/m3, while that of water is 1000 kg/m3. A) While the steel hull is fully submerged in the water, what is the volume of water displaced by the hull? I really have no idea how to...

Homework Statement I'm to design a crane, and therefore I need to find the reactions in the jib and also make the crane stable. 1. I need to find the max. load that the crane is able to lift. Therefore i have to find the reactions where the horisontal and vertical boom is meeting. 2. I need...

1. The 12.2m crane weighs 18 kN and is lifting a 67-kN load. The hoisting cable (tension T1) passes over a pulley at the top of the crane and attaches to an electric winch in the cab. THe pendant cable (tension T2), which supports the crane, is fixed to the top of the crane. Find the tensions in...

Homework Statement Ok. So, i have been giving the assignment of designing and testing an engine room crane for use on ship. I have designed a crane which has 2 i-beams which a trolley travels along. My questions are:- -How do i find the second moment of area of the I-beams? The equation i...

Homework Statement Need to do calculations for the jib. The jib is 600 mm long and 40 mm wide. It is attached to a base at the bottom with a pin. The cable is going through from the motor, and at the top there is a pulley. We have to lift 2 kg of weight with a motor. The jib is very...

Homework Statement The system in the Figure is in equilibrium. A mass M1 = 230.0 kg hangs from the end of a uniform strut which is held at an angle θ = 48.0° with respect to the horizontal. The cable supporting the strut is at angle α = 29.7° with respect to the horizontal. The strut has a...

Homework Statement A quarry crane is used to lift massive rocks from a quarry pit. Consider the simplified model of such a crane shown in the figure. The ends of two poles are anchored to the ground at the same point (point O). From this point, one pole rises vertically and the second pole...

Homework Statement A quarry crane is used to lift massive rocks from a quarry pit. Consider the simplified model of such a crane shown in the figure. The ends of two poles are anchored to the ground at the same point (point O). From this point, one pole rises vertically and the second pole...

Static equilibrium! Homework Statement A 25-ft crane supported at its lower end by a pin is elevated by a horizontal cable as shown in the figure. A 250-pound load is suspended from the outer end of the crane. The center of gravity of the crane is 10 feet from the pin, and the crane weighs...

Homework Statement A simple crane consists of a rigid rod that is hinged to a wall at one end and tied to the wall with a horizontal cable at the other end. The rod makes an angle θ to the wall. At the same end to which the cable is attached there is also a frictionless pulley. The rope that...

Homework Statement The wall crane in Fig. 3 supports a load of 800 N. Determine the horizontal and vertical components of reaction at the pins A and D. Also, what is the force in the cable at the winch W? http://img182.imageshack.us/img182/992/tutorialse0.jpg...

crane static problem... Homework Statement A 25-ft. crane supported at its lower end by a pin is elevated by a horizontal cable. A 250 lb. load is suspended from the outer end of the crane. The center of gravity of the crane is 10 ft. from the pin, and the crane weighs 200 lbs. What is the...

Can anyone tell what the angle of heel means? (how to calculate it in a barge with a crane)

Hey guys, I'm trying to figure out how the pulley system / gearing works on something like this - http://www.chapman-leonard.com/products/telescoping%20crane%20arms/15'%20Telescoping%20Hydrascope.htm Basically some kind of pulley system make the front 2 telescoping sleeve move in and out...

Homework Statement 2 problems. 1: A man lifts a 91kg person straight up a distance of 1.2m in 0.51s. What power is used to do this? 2: 3.00x10^2kg piano is lifted at a steady velocity from ground to a height of 10.0m. The crane doing the lifting has a steady power of 4.00x10^2W. What time...

Homework Statement A crane with jib AB, 7m long. Centre of gravity 3m from A, inclined at 30 degrees to the vertical. The horizontal tie is attached at C, 5m from A. If the mass of the jib is 200kg and the load at B is 600kg, what is the tension in the tie...

A 500kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob's rope pulls to the left, 15 degrees below the horizontal, with 500 Newtons of tension. Ellen's rope pulls toward the right, 25 degrees below the horizontal. (a) What...

How can you increase the mechanical advantage of geared jib crane machine?

I can't solve this problem, can u ? We have this crane hook which has a force F=3000dN pulling it down and we have to calculate a few designing elements look to the section and calculate the safety factors for: 1. the crane hook (part No. 5 )at the section A-A and B-B . 2. the hook trunion...

hi guys i would like to get data-or informations about the design of mobile cran components such as(hook,boom,wire rope drum and the wire rope)and more if it was allowed,i did a lot of google search and didnt find really what i wanted to get,we are designing a mobile crane its capacity is...

hello- i had this problem: the arm of a crane is 15.0 m long and makes an angle of 20.0 degrees with the horizontal. assume that the maximum load for the crane is limited by the amount of torque the load produces around the base of the arm. a) what is the mximum torque the crane can...

I want to build a foldable engine crane that can lift 2 ton of load. Can anyone tell me how to design it and draw a free body diagram complete with formula to determine loads at each point.

EXCLUSIVE: HANGED FROM A CRANE AGED 16 EXCLUSIVE JUSTICE IRAN STYLE: SICK GIRL EXECUTED BY JUDGE SHE DEFIED Her crime? She had sex with an unmarried man By Susie Boniface Something to be kept in mind when reviewing any crises in the middle east. Iran is constantly exporting its Islamic...

Or, Crane fly, We have millions of the things, i have never seen so many, the daft beggars are crashing about all over, every now and then there comes a Chomp as benji tries to catch one, the law of averages says he will, but he is getting on, I watched one of these flys circle the hob...

First question I want to arise is: what is Crane paper #410?. As far as I have looked for it in the web, it seems to be something like a Handbook for those engineers which are involved in fluid flow calculation in professional enterprises. It has lots of tables and formulation (which surely...

Dan Christensen, Louis Crane Causal sites as quantum geometry 20 pages, 3 figures http://arxiv.org/abs/gr-qc/0410104 Starting a separate thread about the Causal Sites paper in case there's interest. I will quote some exerpts in the next post. Here's my comment where I flagged the paper...

QUESTION: The boom DF of the jib crane and the column DE have a uniform weight of 50 lb/ft. If the hoist and load weight 300 lb, determine the resultant internal loadings in the crane on cross sections through points A, B, and C. (Diagram and answers are attached) I'm just hoping someone...

Im having a bit of trouble with this problem: A crane of mass 5288.51 kg supports a load of 789.67 kg. The crane are is 7m long and the angle it makes wiht the horizontal is 47.627 degrees. The distance between the front and rear wheels is 4 m. Assume that the center of mass of the...