A Hydraulic Crane : The Present Work Is Carried Out On Telescopic Crane Essay

To fire it, the spoke or arm was forced down, against the tension of twisted ropes or other springs, by a windlass, and then suddenly released. As the sling swung outwards, one end would release, as with a staff-sling, and the projectile would be hurled forward. The arm would then be caught by a padded beam or bed, when it could be winched back again. The Onager is usually the first type of catapult

The purpose of the Boomilever Project is to build a cantilevered truss that is light-weight while still able to support 15 kilograms. With this project it serves to reinforce the cumulative concepts that have been taught throughout this semester of Engineering Statics. It has been necessary to research designs, types of wood, and types of adhesive that will create a final result that is consistent with the

“castello, a 65-foot-tall crane with a series of counterweights and hand screws to move loads

A trebuchet is a siege weapon most commonly used in the middle ages. It uses gravity to propel an object. There are competitions held today called "Pumpkin Chunkin '" which use trebuchets to launch pumpkins as far as possible. The common question is what the dimensions should be when making it. Should the arm be longer or shorter? Should the counterweight be heavier or lighter? These questions have been asked by competitors in trebuchet competition as well as engineers. And this is why the project is in the field of mechanical engineering.

Trebuchets are most commonly known as medieval weapons used in the Middle Ages. Us three were to build a smaller scale of the trebuchet and had to make sure it hit the target two out of the five times. We had to build a hinged-counter weight type of trebuchet with wheels that could throw a ping pong or golf ball. Through the paper I will explain the history throughout trebuchets and why to have wheels and to have a hinged counter weight on the trebuchet. Also the calculations on the potential energy and velocity are through this report. Our trebuchet met all of the requirements that were to be made and it hit the target three out of the five times. This report will

At the end of “The Cranes”, the author paints a picture of resolution in the car. The older couple, having made up their mind to end their lives together, make their final preparations in drastic calmness. The wife seems to have a few concerns about their decision, but takes comfort in her husband’s steadfast determination. The end of the story shows the woman closing her eyes one final time as she remembers, for one last minute, a scene from their past. Suddenly, the cranes outside the car shoot upward into the sky, presumably in response to a gunshot that startles them.

Calculations were performed to determine the effectiveness of the design of the platform. Allowing for a safety factor of 1.5 times the design weight of 10kg and considering the bridge must not be overdesigned; plans were made for the bridge to fail at 25kg, 2.5 times that of the design weight. According to the calculations, the bridge would hold a load of over 15kg and experience failure at 20kg in the members. These calculations were later disproven in the testing, breaking 8kg earlier than expected, due to unforseen errors. An analysis of the bridge design and calculations has been included at the end of this report.

To visualize what a sonic boom can look like, you could imagine a boat traveling in the water with the ripples it makes when it moves in the water. A slow riding boat will make the ripples travel around it in all directions, but when traveling at a much faster speed, the ripples of the waves are only seen from behind the boat, unable to get out of the way. When this happens, they are characterized as wakes. How is this compared to a jet flying in the air? Well, when a jet is flying in the atmosphere, sound is produced from all directions, similar how ripples are caused when a boat travels through water. Obviously, sound is traveling a lot faster than the water around a boat. The jet will have to travel at much higher speeds to form a wake. When the jet finally passes the sound barrier, it is traveling faster than the noise around it can travel in front of the jet, therefore wakes are formed and a sonic boom

2. The cable of a large crane applies a force of 2.2x10^4N to a demolition ball as it lifts it

tug of a catamaran design consisting of a barge attached to the tug. After substantial

In this experiment we tested the effect of change in arm length of the Trebuchet on the distance traveled of the projectile. We wanted to do this experiment due to our interests in engineering and our interests in the medieval era siege weaponry. We started by researching different types of Trebuchets and decided to go with the most modular and modern version. We decided to build a floating arm Trebuchet which uses the counterweight as the fulcrum. This allowed us to easily exchange the arms for testing. We built the Trebuchet using long 5.08cm x 10.16cm (2in x 4in) pieces of wood, four 4.54kg (10lb) weights, a single 1.27cm (1/2in) x 1.22m (4ft) piece of rebar, and a pouch made of paracord and duct tap. We tested this by building a Trebuchet

Baxton Technology Company manufactures surface automotive hoists which are used by garages, service stations and other repair shops to lift cars for servicing. Because of its design, quality of workmanship, safety features, ease of installation and five-year warranty, Baxton Lifts achieved a reputation as the “Mercedes” of the hoist industry and is considered a leader in automotive lift safety in Canada and United States.

Most airplanes with a retractable landing gear have a gear warning horn that will sound when the airplane is configured for landing and the landing gear is not down and locked. Normally, the horn is linked to the throttle or flap position, and/or the airspeed indicator so that when the airplane is below a certain airspeed,configuration, or power setting with the gear retracted, the warning horn will sound. Accidental retraction of a landing gear may be prevented by such devices as mechanical downlocks, safety switches, and ground locks. Mechanical downlocks are built-in components of a gear retraction system and are operated automatically by the gear retraction system. To prevent accidental operation of the

Superstructure bears the load that is being passed over the bridge and it transmits the forces caused by the same to substructure. Load received from the decking is transferred on to the substructure by Bearings. They also distribute the load evenly over the substructure material as it may not have sufficient strength to bear the superstructure load directly. Piers and Abutments are the vertical substructures which transfer the load to the earth in the foundation. Wing walls and returns are constructed as the extension of

Hypothesis: If one increases the length of a cantilever, one would expect there to be an increase in deflection/flexion of the cantilever. Similarly, if one increases the mass of the load, one would expect there to be an increase in the deflexion/flexion of the cantilever. In addition, I predict that proportionality will also occur