Scissor (Lambo) doors
Scissor doors (also beetle-wing doors, jack-knife doors, switchblade doors, Lamborghini doors, and Lambo doors) are automobile doors that rotate vertically at a fixed hinge at the front of the door, rather than outwardly as with a conventional door.
The first vehicle to feature scissor doors was the 1968 Alfa Romeo Carabo concept car, designed by Bertone's Marcello Gandini. The door style was dictated by Gandini's desire for an innovative design, and by his concern over the car's extremely poor rear visibility. In order to reverse the car, the driver would be able to lift the door and lean his upper body out of the hatch in order to see behind the car. The first production car to feature the doors was a Lamborghini, Gandini's Countach; the sports car's wide chassis created similar problems to those found on the Carabo, calling for the unusual door configuration. The doors were used on the Countach's successor, the Diablo, on its replacement, the Murciélago, and on a low-production run derivative of the Murciélago called the Reventón. The Aventador is the latest Lamborghini car to feature the trademark doors. Having used the exotic door style for several of its cars, the Italian manufacturer has become synonymous with the implementation of scissor doors, which are sometimes colloquially referred to as "Lambo doors".
1968 Alfa Romeo Carabo concept
- Offers the possibility of operating the car with the door open, in a manner that would be difficult or impossible in a car with conventional doors.
- Because the doors stay within the car's track throughout their range of movement, they are useful when parking in tight spaces. A gullwing door style offers similar visibility, but the doors swing out from the car's area slightly.
- The hinge is placed in a similar location to a conventional door, so a convertible version of the car is possible with the same door style.
- The door still impedes access/egress much more than a gullwing and, in some cases, more than a conventional door.
- The manufacture cost of the door hinge can be more than that of a conventional door.
- If the height of the parking lot ceiling is insufficient, the door may come into contact with it when opened.
- In the event of a rollover, emergency egress may be more difficult than with conventional doors, if not impossible.
There are different types of scissor doors. The conventional type rotates to 90 degrees. Scissor doors can be powered and they usually are.
Vertical Lift System
VLS doors have a scissor door configuration. The biggest difference is that they are designed to initially open slightly outward before opening upward to allow the top edge of the door to clear the door frame and A-pillar. Although butterfly doors also move upwards and outwards, VLS doors are not butterfly doors, this is because VLS doors move outwards to a very small degree compared to the angle of butterfly doors.
Although conventional scissor doors rotate to 90 degrees, some can rotate up to 130 degrees; these are commonly used for modified cars. These have the benefit that they don't obstruct the entrance or exit to the car as much as conventional scissor doors. VLS doors also can rotate to 130 degrees.
Scissor-conventional door hybrid
Some aftermarket example scissor doors are also designed so they can open vertically, and horizontally like a conventional car door. These are used so the user can get the benefits of both types of door and open the door in whichever style is best suited to the situation.