TomH From United States of America, joined May 1999, 960 posts, RR: 2 Reply 1, posted (12 years 6 months 1 week 18 hours ago) and read 1321 times:
Y means service evaluation, X stands for experimental, which is usually associated with a design prototype. The YC-122 info you are after can probably be located in the Avitruk section at www.theaviationzone.com/facts/c123.htm.
I can add that some of the YC-122Cs flew later as civilian aircraft, though I don't know anything about the owners or type of operation they had.
FBU 4EVER! From Norway, joined Jan 2001, 998 posts, RR: 7 Reply 8, posted (12 years 6 months 6 days 2 hours ago) and read 1273 times:
The original design was a Transport Glider,built by Chase,and called CG-18.In 1948,2 R-2000's were added and it became YC-122A.The B version had 2 R-1820's,as did the C model.9 production examples of this latter version were produced.30 seats and fixed gear.Used by the USAF until mid-57.
Chase was acquired by Fairchild later on and they produced the C-123 Provider wich also started out as a Chase glider project,the G-20.