raymondu999 wrote:McLaren IIRC has used a traditional jack, at least until now. Merc were the first to this jack design in 2010, then Ferrari followed suit. Not sure about teams other than those 4.
Actually, I'm pretty sure that the Brawn team were the first to have the swivel jack.
Regarding the comparison to the pump truck and how they get one pump to lift the car, it's not about being on steriods as such. A conventional pallet truck works with a piston attached to the handle lever, and another one attached to the forks, so repeatedly pumping the handle works like a ratchet pumping up the piston attached to the forks.
The one used for pitstops doesn't have this pump up feature as such. When the car arrives, the ledge that the front wing sits on is already in the up position, and the jack-man uses his weight against the lever as per an old fasioned jack, the hydraulics/pneumatics only work to lower the car when the jack man squeezes the handle.
I can only assume that the jack is then re-set somehow before the next pitstop.
My bet would be pneumatic rather than hydraulic, just because it would presumably drop slightly faster as air is less viscous than hydraulic fluid, and the job is merely to temporarily hold in place rather than to jack up from compression on a secondary cylinder.
Actually, thinking about it, I'm not sure it even needs to be hydraulic or pneumatic. A simple latch to hold it in place until the jack man pulls the trigger and let gravity do the work, would probably do the job, less to go wrong! But they do look like hoses in that picture so it's something!