I have a question about the crashworthiness of Diesel locomotives.
I found that the earliest requirements were PRR passenger cars with a buff load of 200.000 lbs in 1906 followed by RPO cars with 400,000lbs in 1912. It was later doubled to 800,000 lbs.
in 1939 the AAR made the 800,000 lbs a Recommended Practice for passenger cars and a Standard 1949 (S-034: Specifications for the Construction of new Passenger Eqipment Cars).
In 1956 it got mandatory for MU- units.
Locomotives are never mentioned. Rules for locomotives that I know were first published in 1989 with AAR's S-580. Later came the FRA and APTA rules.
Adopted the locomotive manufacturers the above buff loads volontarily? Or were there no crashworthiness measures before 1989?
Regards, Volker
