Idea car with two steering wheels often surprises ordinary people, but in a professional environment this is a completely established concept. Most often we are talking about specialized equipment for driving schools, where the safety of the cadet and instructor comes first. However, there are other contexts: from adapting vehicles for people with disabilities to exotic tuning projects.
Installing a redundant control system is a complex technical process that requires intervention steering gear and electrical circuits. Just screwing on the second wheel is not enough; synchronization or the ability to take over control is necessary. In this article we will look in detail at how this works, what legal methods of implementation exist, and why such functionality is not available in ordinary cars.
It is worth noting right away that serial passenger cars with two full-fledged steering wheels for the driver and passenger practically do not exist in mass production. All such solutions are either factory special versions for training, or the result of deep modifications by enthusiasts. Understanding of operating principles backup steering wheel will help you better understand safety and tuning issues.
The concept of backup management in driving schools
The most common and legally valid option is training vehicles. Here duplicate steering wheel is set for the instructor, who must be able to instantly intervene in the driving process. This is a critical safety feature to help prevent accidents in the event of panic or rookie error.
The design of such a unit usually consists of an additional shaft, which is connected to the main steering mechanism through a gear system or chain transmission. When the instructor turns his steering wheel, the wheels turn, even if the student holds his steering wheel steady. Modern systems are often equipped with an “interception” mechanism, where the instructor’s effort takes precedence.
It is important to understand that the installation of such equipment requires mandatory registration with the traffic police and changes to the design of the vehicle. Without the appropriate documents and certificates, operating a vehicle with a modified steering system is prohibited. This is not just bureaucracy, but a necessity, since steering safety - a key factor in survival on the road.
⚠️ Attention: Self-installation of a second steering wheel without certification and registration with the traffic police makes operating the car illegal and dangerous. Any changes to the steering must undergo laboratory testing.
There are several types of drives for redundant control:
- ⚙️ Mechanical: rigid connection through shafts and hinges, reliable, but difficult to install.
- 🔗 Chain: Uses a bicycle or motorcycle chain, easier to install, but requires tension.
- 🔌 Electric: uses servos and rotation angle sensors, the most modern, but expensive option.
Technical features of installing a duplicate
Installing a second steering wheel is a labor-intensive process that affects the front panel (dashboard) and the space under the passenger's feet. Engineers need to find a place to place an additional shaft that will not interfere with the passenger's legs, but will provide the necessary structural rigidity.
The key element is cardan shaft or telescopic shaft, which transmits rotation. It should have minimal play so that feedback from the road is not lost. If there are gaps in the system, the instructor will not be able to feel the beginning of a skid or hitting an obstacle through his steering wheel.
During installation, it is often necessary to dismantle standard interior elements, such as the glove compartment or heater air ducts. This requires highly qualified performers, since a violation of the tightness of the ventilation system or the integrity of the wiring can lead to serious problems. Electronics The modern car is also sensitive to interference.
☑️ Checking the quality of installation of the backup steering wheel
Particular attention is paid to securing the steering wheel itself. It must withstand sudden jerks and significant forces. Reinforced steel brackets are often used, which are welded or screwed to the load-bearing frame of the body. The use of plastic elements is unacceptable here.
Adaptations for drivers with disabilities
A separate category of cars with modified controls is transport for people with disabilities. Although here we are often talking about manual control (levers for gas and brakes), in some cases modification of the steering unit is also required. For example, installing a steering wheel with a smaller diameter or with a modified spoke shape.
Sometimes it becomes necessary to install additional vertical rudder or a joystick that duplicates the functions of the main wheel. This allows people with limited hand mobility or certain physical disabilities to fully control the vehicle. Such systems are certified as medical equipment.
In such projects, electric power steering with increased sensitivity is often used. A standard power steering may be too tight for someone with weakened muscles. Therefore, the rework includes not only mechanics, but also reconfiguration electronic control unit amplifier.
| Adaptation type | Difficulty | Cost | Registration required |
|---|---|---|---|
| Control levers | Average | High | Required |
| Turning ball | Low | Low | Preferably |
| Duplicate steering wheel | High | Very high | Required |
| Joystick | Very high | Exclusive | Required |
The government often supports such conversions through subsidy programs. However, in order to receive compensation, all work must be performed in specialized centers with the issuance of a full package of documents. Homemade solutions are not quoted in this case.
Exotic projects and tuning "two in one"
In the world of car tuning, there are projects where two steering wheels are installed for the sake of aesthetics or shockingness. For example, in limousines or show cars. Here the second steering wheel can be decorative or have limited functionality. Such cars are not intended for daily use in city traffic.
There are also concepts where the driver and passenger can change roles while driving. A complex system is used for this electronic lock one of the steering wheels. Only the one currently selected is active. Implementing such a scheme on a regular car with a hydraulic booster is practically impossible without completely replacing the steering rack.
Some enthusiasts create racing simulators inside real cars. In this case, the second steering wheel is connected to the gaming computer and rotates independently of the wheels of the car. This is a safe method, since there is no mechanical connection with the road, but it requires a competent approach to electrical safety.
Why don't they make two steering wheels in regular cars?
Two full-fledged steering wheels in a production car are a risk. In an emergency situation, two people may begin to turn the steering wheel in different directions, which will lead to loss of control. In addition, this increases the cost of the design and reduces space in the cabin.
Changes in steering geometry or inertia can make the vehicle unpredictable at high speeds.
Legal aspects and registration of changes
In Russia and most CIS countries, changes to the vehicle design that affect safety (and steering is a key element) are regulated by strict rules. The process of legalizing the second steering wheel begins with a preliminary technical examination.
The owner must obtain an opinion on the possibility of making changes. Then the work is carried out in a certified laboratory. After installation, you must undergo a security check and obtain a protocol. Only with this package of documents can you contact the traffic police to make a mark in Vehicle Registration Certificate (CTC).
Ignoring these procedures will result in fines, deregistration of the vehicle, and a ban on operation. Traffic police inspectors are well aware of the main signs of unauthorized intervention in a structure. If you plan to use the car for commercial driving lessons, the availability of permits is checked especially carefully.
⚠️ Attention: Selling a car with unregistered modifications to the steering may be considered the sale of an unsafe vehicle, which entails legal liability.
The cost of legalization may exceed the cost of the equipment itself. Therefore, it is often easier to buy a specialized training vehicle than to convert a civilian version. Economic feasibility is an important factor that cannot be ignored.
Safety issues and operational risks
The presence of a second steering wheel creates additional risks. Firstly, there is a risk of injury. In the event of an accident, the second steering wheel becomes an additional hard object in the cabin, which can injure the passenger, especially if the airbag does not deploy (and during modifications, their operation is often disrupted).
Secondly, this is a psychological factor. The cadet can relax knowing that the instructor has your back. Or, on the contrary, be afraid of sudden intervention. For successful training, it is important that the backup steering wheel is used only in critical situations, and not for constant “steering” instead of the student.
Maintenance of such a system also becomes more difficult. It is necessary to monitor the lubrication of the hinges, the tension of the chains and the condition of the fasteners. Any malfunction in additional drive The main steering wheel may jam, which will lead to a disaster on the road.
Regularly check the lubrication in the joints of the backup steering wheel. Creaking or jamming is the first sign that the system may fail at a critical moment.
Therefore, before you decide to take such a step, weigh the pros and cons. In most cases, for private use this is an unnecessary luxury and a source of problems, but for business it is a necessary but costly investment.
Main conclusion: A car with two steering wheels is a highly specialized tool for training or adaptation, requiring complex registration and carrying increased risks if used incorrectly.
Frequently asked questions (FAQ)
Is it possible to legally install a second steering wheel on a personal car for training a spouse?
Formally, it is possible, but the procedure for registering changes in the design (especially the steering) is so complex and expensive that it is easier and cheaper to buy a full-fledged training vehicle or hire a professional instructor with an equipped machine.
What is the name of the device that allows the instructor to brake?
This is usually called a "redundant brake pedal" or "auxiliary brake pedal." It is mechanically or hydraulically connected to the main braking system of the vehicle.
Does the second steering wheel affect the operation of the electric power steering (EP)?
With proper installation, no. The mechanical duplicate should not interfere with the operation of the ESD sensors. However, with an electrical duplication circuit, flashing or installation of an additional controller is required.
Where can I order the installation of a backup steering wheel?
Installation must be carried out by specialized centers that have a license to make changes to the design of the vehicle. Conventional car repair services, as a rule, do not undertake such complex and important work.