TRAILERS BY A.Jayanth joseph Karthik R.Karthikeyan C.Hariharan
WHAT IS A TRAILER A trailer is generally an unpowered vehicle pulled by a powered vehicle. Commonly, the term trailer refers to such vehicles used for transport of goods and materials. Some trailers are made for personal (or small business) use with practically any powered vehicle having an appropriate hitch, but some trailers are part of large trucks called semi-trailer trucks for transportation of cargo. Certain can be towed by commonly accessible pickup truck or van, which generally require no special permit beyond a regular drivers license.
Travel trailer A custom made popup camper.Popup campers are lightweight, aerodynamic trailers that can be towed by a small car . They are built to be lower than the tow vehicle, minimizing drag. Others range from two-axle campers that can be pulled by most mid-sized pickups to trailers that are as long permittable laws Larger campers tend to be fully integrated recreational vehicles, which often are used to tow single-axle dolly trailers to allow the driver to bring small cars on their travels.
SEMI-TRAILER A semi-trailer is a trailer without a front axle. A large proportion of its weight is supported either by a road tractor or by a detachable front axle assembly known as a dolly. A semi-trailer is normally equipped with legs, called "landing gear", which can be lowered to support it when it is uncoupled. . A road tractor coupled to a semi-trailer is often called a semi- trailer truck or semi, or in the UK an articulated lorry. The fifth wheel on a truck connects to a semi trailer Kingpin A semi-trailer leads to more weight on the driven axles of the tractor than a truck plus trailer combination,
MOTORCYCLE TRAILER A motorcycle trailer may be a trailer designed to haul motorcycles behind an automobile or truck. Such trailers may be open or enclosed, ranging in size from trailers capable of carrying several motorcycles or only one. They may be designed specifically to carry motorcycles, with ramps and tie-downs, or may be a utility trailer adapted permanently or occasional Another type of motorcycle trailer is a wheeled frame with a hitch system designed for transporting cargo by motorcycle. Motorcycle trailers are often narrow and styled to match the appearance of the motorcycle they are intended to be towed behindy to haul one or more motorcycles. universal joint to enable the trailer to lean and turn with the motorcycle
POWER TRAILER MOVER A powered trailermover is a powered vehicle made to push and pull trailers that require lifting on one end before maneuvering. Some are also called trailer pushers or powered trailer pullers. The powered mover is capable of pushing and pulling an RV, a camper, an equipment trailer, or a boat.
TRAILER WINCHES Trailer winches are designed to load (or unload) boats and other cargo to and from a trailer. They are made up of a ratchet mechanism and cable. The handle on the ratchet mechanism is turned to tighten or loosen the tension on the winch cable. There are both manual and motorized trailer winches.
LIVESTOCK TRAILERThere are a number of different styles of trailers used to haullivestock such as cattle and horses. The most common is the stocktrailer, a trailer that is enclosed on the bottom, but has openings atapproximately the eye level of the animals to allow ventilation. Thehorse trailer is a more elaborate form of stock trailer.They usually have adjustable vents and windows as well assuspension designed to provide a smooth ride and less stress on theanimals. In addition, horse trailers have internal partitions thatassist the animal in staying upright during travel and protect horsesfrom injuring each other in transit.
Hitching a trailer A trailer coupler is used to secure the trailer to the towing vehicle. The trailer coupler attaches to the trailer ball. This forms a ball and socket connection to allow for relative movement between the towing vehicle and trailer while towing over uneven road surfaces. The trailer ball is mounted to the draw bar, which is usually removable. The draw bar is secured to the trailer hitch by inserting it into the hitch receiver and pinning it. The three most common types of couplers are Straight Couplers, A-Frame Couplers, and Adjustable Couplers. A trailer hitch, fifth wheel coupling or other type of tow hitch is needed to draw a trailer with a car, truck or other traction engine.
FIFTH WHEEL COUPLING The fifth wheel coupling provides the link between a semi- trailer and the towing truck, tractor unit, leading trailer or dolly. Some recreational vehicles use a fifth wheel configuration, requiring the coupling to be installed in the bed of a pickup truck as a towing vehicle. The coupling consists of a coupling pin (or kingpin) on the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. The surface of the semi-trailer rotates against the surface of the fixed fifth wheel, which does not rotate.
TRAILER STABILITY Trailer stability can be defined as the tendency of a trailer to dissipate side-to-side motion. The initial motion may be caused by aerodynamic forces, such as from a cross wind or a passing vehicle. One common criterion for stability is the center of mass location with respect to the wheels, which can usually be detected by tongue weight. If the center of mass of the trailer is behind its wheels, therefore having a negative tongue weight, the trailer will likely be unstable.
TRAILER DECKING Trailer decking is typically either aluminum, wood, or steel. In addition, Rumber has been recommended as an alternative trailer decking solution. Rumber is "lumber" made from recycled tire rubber and plastics. According to the manufacturer, its durable, non-slip, easy to clean, impervious to water, UV-resistant, and it will not crack, rot, or split. Unfortunately rumber shouldnt be used for car trailers. The material cant take the concentrated weight that a car can place in such a small area without additional crossmember support, the original use for rumber was for horse trailers. Therefore, steel decks or wood decks are the choice for car haulers. Steel decks are much easier to maintain and do not "rot". Wood decks are much easier to repair.
Advantages of all-aluminum trailers : Light weight More load capacity Less rolling resistance equals better gas mileage. Non-skid tongue and groove aluminum extruded flooring. Low maintainence surface. Maintains its value.
Advantages of wood decking: Wont rust, can rot. Lighter than steel. Your load wont slide around as much, and the deck wont get oily and slippery when hauling cars leaking fluids. Although, diamond-plate decks help with slipping. Wood can loosen, crack, and warp. Fluids soak in, leaving a mess. With a wood deck, you can screw things down to secure them. Pressure treated decking can last up to 25 years. Cracked or broken planks can easily be replaced.
Advantages of steel decking: Cheap to purchase. Wont rot, but will rust if not suitably painted. Provides a strong durable working surface with low maintainence and upkeep. Comes in a variety of surfaces: smooth, checkplate, grate, etc. Easy to modify, add accessories to, repair, change the appearance of. Stands up to the abuse of dragging wrecks or loads on to it. Surface may become slippery in wet or snow conditions. Subject to rusting, can be powder coated or epoxy painted to resist rusting at a premium.
Advantages of open trailers: Less weight. Oils and fluids leak onto the ground, rather than onto your trailer. You can work under the car while its on the trailer. Are much easier to see what is all around it when empty.