Disc or drum

Of course you must pass thru the max static friction force to realize the skidding kinetic friction situation. That is a standard Physics I class lab which 72BluNblu must recall from his engineering studies. Not sure where "stabbing" the brakes requirement comes from. Even with the smallest brakes and largest stickiest tires some linebacker could surely lockup the brakes.

I never claimed drums are superior to disks, indeed the opposite. I just claim that drums were and still are fine for most daily driving by a competent driver. I have overheated drums in 2 cars - 69 Dart w 9" and 65 Newport. Both were on gravel roads in the mountains on a hot CA day where had to keep braking on turns in 2nd. I could have got down in 1st wo braking but would have taken forever. The Newport has massive 11x3 front drums which can absorb a lot of heat but still take a long time to dissipate the heat. Interesting how trains dissipate the massive potential energy when descending the Sierras (generator w/ banks of resistors).

BTW, everyone should ignore the old stopping distance specs. Tires stop the car and today's are much superior to the skinny bias tires those specs are based on. For winter driving, I read where special snow-ice tires gave half the stopping distance of All-Season tires on ice, which is an amazing difference.