Central Airlines Convair 580
N4811C (c/n 101)
In 1967 North Central, in common
with several other carriers elected to modernize its Convair 440s
to prop-jet status.
This entailed, among other things, the substitution of the radial
piston Pratt &
Whitney R-2800-CB16 engines
for Allison 501-D13D turboporops delivering some 3750 shp each.
The conversions were done by PacAero in California. (Other Convair 440
conversions had either
Napier Elands, who did the very
first turboprop conversion incidentally, or Rolls Royce Dart engines.
were not as popular in the US as those with the Allison turboprops
- NIH syndrome?). The
shot above was taken
by Bob Garrard at Port Columbus (Ohio) International Airport in May of
1970 and illustrates well a 580 in the original
North Central markings. Later versions of the livery
deleted the gold trim.
Trademark "Herman" now features large on the fin and rudder.