We like to say that 4 degrees inclination gives 100 percent improvement. But why do we use these figures? Well the first one is easy. Turny Low Vehicle is installed at a 4 degree inclination to the vehicle floor. No other swivel seats are, but pretty much every vehicle seat from this side of the 1950’s are. This inclination accounts for many benefits of the user experienced comfort when riding in the vehicle: pressure relief, extra head space and the ability to recline the seat without risking slipping forward. Riding in the vehicle is also where the user will spend 99 percent of the time in their seat.
The remaining percent is using the swivel seat to get seated. But if a seat is tilted backwards in the vehicle won’t it be tilted sideways when swiveled out? Yes it will, and that’s the good part. You see, the highest point in the front door opening of most vehicles today, no wait, ALL cars of today, lies where the B-pillar meets the roof. The 4 degree inclination places the user’s head right at this point.