Amtrack Phrase 3 passengers wont couple

[usher42]

My lHO layout is 4x6 and i'm using 22" radius curves and my passengers wont couple. Should i us a larger radius curves.

[Conrail Quality]

22" radius should work fine. The couplers themselves are probably the problem. Try replacing them with Kadee #5's or #148's.

[ebtbob]

Usher,

       First of all,  with a 4x6 railroad,  22 inch radius is as large as you can go.  Remember,   that measurement of the radius is a track centerline measurement so you basically have no room left.
        As for the cars,   how long are they, and who makes them.  If they are Walthers,  there is a good chance that the diaphrams at the ends of the cars the real culprit.   A friend and I discovered that you can put a long shank Kadee coupler on one end of each car.   Attach that to the shorter shank coupler of the next car.   This creates a larger distance between the diaphrams but it is not unsightly and the cars will negotiate a tighter radius than before and the couplers will hook together.