Must have been pretty scary in the cab, stopping that quickly.
I was shunting an unloaded Volvo FH tractor unit earlier today.
Step on the brakes and the whole cab rocks forward, it’s nothing but glass in front of you and it feels quite exposed..
Some bad info above also, air disc brakes are far superior to any drum combo in every way, but drums are still favoured still by some operators/fleets. They can also be favoured for heavy off road applications but not always.
UK is mainly drums and trailers still having had bad experience with bad Meritor disc brakes back circa 2000. A bad product really hurt the technology. Compared to Europe who are 80%+ ADB.