I am in too,with the never built Konon Mk3(AU).Designed by Spiros Vasiliades (1904-1986),this DEG dates from 1960.At 125,5m X 14m and 3400tn cancelled with the label "Too Ambitious".Propulsion was CODAD again,with 4 GENME/Pielstick 16V,29760hp total,giving 28-29kn max.Range 8000nm/15kn,4500nm/20kn.
Armament 1 Mk38 5",1 Mk13,Limbo ASW mortar (from withdrawned Hunt DD) or Bofors ASW mortar,two Zelitz ZH-220 helicopters,hangar.Later versions would have ASROC,more capable helicopters and SAM Sea Falcon.
Also there was the Mk3A design,from 1966:Same hull with above,all the impovements mention above,CODAG propulsion with twin Aerodyne J1800 gas turbines in place of rear diesels.Speed 31-32kn for this variant.Range as above.Both designs could reach 22kn max with only two diesel working.
These designs cancelled due to several issues,but lead to Kimon Class DDG some years later.The telescopic hangar of Kimon behind of the Mk13 came from Konon Mk3.
Note that for political reasons the design classified as "FFG".