Hi all,
OK, so “timmyd” is looking for a practical solution for his logging caboose.
The following is known:
Has to operate with a variety of equipment on a R1 (600mm) radius.
My suggestion: mount the coupler on a tang that pivots ahead of the kingpin - no it is not a proper talgo arrangement. Use the Kadee coupler which is self-contained while having the largest lateral swing.
This will result in a compound movement: a) the coupler will use up all the lateral movement first… then b) the tang will swing as far as necessary without affecting the swiveling of the trucks (as would be the case with a Talgo arrangement). The tang is centered by a spring which connects to the center of the caboose. Since both ends use the same arrangement the tangs can swing independent of each other or the trucks.
Drawing for better illustration coming up in a little while!