There appears to be many types and brands of close coupling systems for HO, but nothing I can find for O scale. I am keen to replace the large knuckle couplings on my Lionel and MTH passenger coaches to make them close coupled, the diaphragms touching in the straights, but opening up around O72 down to O27 curves. Obviously the length of the passenger coach will have a lot of influence over the ability of the coupling to perform its job.
Has there ever been an after market product replacement?
Does anyone have any designs of close couplings that I can look at?
Is there a reason that no one does O scale close couplings? Maybe its the huge weights of a consist, or the unrealistic radius curves that O scale must endure...
The only pictures of 2x HO systems I can find are here: http://www.keen-systems.com/Couplings.html
Cheers Pete