Many people do not realize that they need a trunk on the roof of the car until the cargo loads have to be transported. In the cabin, they are harder to fix, not to mention the right placement, but a properly equipped roof of the car - perfect for this place. Especially the trunk on the car roof is needed to those who prefer active rest - bicycles or skiing the most difficult to fit in a standard trunk or in the car.
Positive and negative sides
Many cannot decide whether they need a roof trunk. To make a decision advise clearly paint all the pros and cons of this design.
Pluses are extremely obvious:
- More opportunities to carry things
- Roof and paint on it will always be protected from damage
- You can carry objects that do not fit into the usual trunk
- Many options for reliable fixation
- Items do not interfere with the road
- Salon is always free
- In some machines, the roof trunk makes it possible to increase the size of the cabin after the luggage compartment is emptying.
Cons are much less rushed into the eyes, but still have:
- The weight of the subject in the trunk can not be more car carrying capacity
- Even with an empty top trunk begins gasoline overrun. Minimum overrun - 2 l per 1000 km
- Lift heavy items in such a height
- There is a risk badly fix things. In addition, they can make sounds, distracting the driver
- Due to the reduction of aerodynamics, problems will arise when overclocking or car maneuvers
- It is necessary to closely monitor the height of tunnels, arches and bridges due to the increase in car height
Instruments
The top trunk is made in two ways:
- Cook a holistic metal design
- Transversely weld to the railway rains
Realits are two longitudinal mounts on the roof of the machine. Sometimes goods are fixed to them, but it spoils the paint on the roof. In addition, they are not on each model of the machine.
Heavy metals do not use heavy metals to create a trunk, as it will further reduce the ability of the machine to accelerate and maneuvers. In addition to this with such materials it is difficult to work. Therefore, car enthusiasts prefer to use aluminum for the manufacture of the upper trunk.
It is flexible, easy and durable. In addition, it is not afraid of corrosion. Its only minus is the price, so it is replaced with a profile tube with thin walls. In the most extreme case, stainless steel sheets are used.
In addition, you will need:
- Apparatus for welding
- Bulgarian
- Foam for mounting
- Tools for grinding
- Fiberglass
- Clamps for silencers
- Dye
Manufacturing process
For the welding of fasteners to the rails, it will be necessary to find out only the distance between them. But the complete design requires a responsible approach. For its manufacture, calculate the size and weight of the trunk, at the same time the project is drawn.
- Measure the length and width of the roof, determine the parameters of the structure. Then in the drawing mark the location of the jumpers and determine their length, dieting the height of the side and the width of the trunk bottoms.
- When designing, it is taken into account that the rectangular trunk interferes with natural aerodynamics, so it gives a slightly oval form. In addition, it should be remembered that the manufacture of luggage design needs metal welding skills.
- To begin with, the grinders cut off metal pipes to create a frame. In accordance with the drawing, 2 longitudinal and as many transverse tubes with fixed sizes should be obtained. They will be useful for both half the design.
- After cutting and the necessary measurements, the pipes are welded so that 2 rectangular frames come out. Their parameters may not exceed the roof parameters. In this case, the front of the trunk is created from the cut in the form of an arc so that it does not interfere with the air flowing around with air when driving.
- The ribs weld to the lower part to enhance the design. They are located across the iron rectangle through the died distance. If it is planned to transport not only large loads, then an iron grid is welded to the lower frame.
- Then there are four small segments of a thinner pipe and they connect both frames of the rectangular shape, welding them to each other. The top of the side is reserved.
- This design is also enhanced. An even number of metal tubes is harvested with a length of no more than 15 cm. They are placed symmetrically on the sidewalls of the trunk and welded with a welding machine.
- If instead of stainless steel pipes, the material was used, then at this stage it is treated with an anti-corrosion mixture. Sometimes the design is fought or strengthened with fiberglass. Then color in the selected color.
- This design is installed even without rails, for which it is most convenient to fix it. To install it, the roof is drilled and secured the design on it using brackets. This increases the risk of damage to the roof of the corrosion machine.
Despite the seeming difficulties, make the trunk on the roof of the car quite easily. The most important thing is not to be mistaken in the calculations, correctly choose the material and securely secure the metal structure.
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