Although with dual circuit brakes, as are common these days, there's not
so much need. However, it's perfectly possible to design a drum brake of
this size which would lock the wheels at say 30 mph. Or indeed to use the
rear calipers for the job - I had a Rover P6 with Girling disc brakes
where the handbrake was part of the rear caliper, and that would exceed
90% efficiency at the annual MOT.
*(on a baby-size shirt) "Party -- my crib -- two a.m
Dave Plowman firstname.lastname@example.org London SW
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