Re: Ice vs Mechanical Reefers - Off Subject?
In 1954 NP bought 50 mech reefers mostly for frozen food service,
and in 1956 MILW (URTX) bought 40 cars from PC&F. Both groups had
electric heaters and could maintain -10 to 60 degree temperatures
in any weather.
But as Tony noted unless the cargo is pre-cooled ice was still
required. I saw a load of carrots being unloaded once (circa 1968)
from a mech reefer and there was "top ice" (shaved ice) that had
obviously been blown over the load through the doors. This also
was a practice used in ice cooled reefers.