On 03/10/2016 10:39 AM, Mr Macaw wrote:
By lap belts, do you mean seatbelts or something special? When driving
I find that since I'm holding the steering wheel, I don't fall out of
the seat and have no need for a belt.

Just the belt across your lap, not the whole across your torso rigs of
today. Find yourself a nice old tank with a vinyl bench seat and try to
get up to a 1G sideways force in a turn. The car will probably break
loose before you get 1G, but your ass is going to be headed across the
seat well before then.