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Funny you should ask about an after market coupler box for Sergent Sharon couplers in HOn3. Right now I’m working on a design to send to Shapeways to have them do in some kind of nylon. I’m not promising anything just yet. I have to see if my design will work with Shapeways production capabilities.
I’m thinking of a spring centering design that would use the coil spring that comes with the couplers. You would need to drill a tiny hole in the back end of the couplers shank and put a brass pin in the hole that would have about 1mm left sticking out the shanks back end. This pin would act as a keeper for the spring that would be mounted behind the shank. Or you could just leave the spring off like I do a lot of the time.
The box would be one piece with a length that is roughly the minimum of the distance between the inside back of a cars end beam and the front side of the bolster beam.
Right now all I use is the bottom half of a Kadee 714 coupler box on my scratch built cars. They do the job very nicely. But, I can see where are times where a self-centering coupler would be helpfull.
On Wednesday, February 7, 2018, 15:04, John Niemeyer <reverend455@...> wrote:
I modified the draft gear box from a Micro Trains Line (MTL)
1025/1029 to work with the RNB87K couplers for several of my HOn3 models,
including some Labelle. It would be nice if someone better than me, would make
that draft gear box and sell it. I would buy hundreds for my HOn30
Also if you’re worried about shorting thru the couplers. How
often are you going to couple a rod engine front to front? The rear coupler is
almost always insulated anyway, so not an issue. For my brass engines, I have
successfully use Sergent RS1P87 & ES1P87 front pilot couplers with very
little modifications to the engine.
"bit the bullet" today and ordered a "starter kit" of RNC87's. I have some
LaBelle box cars that have very little space between them when coupled together,
so I am hopeful the C's will leave room for the uncupling wand. These cars will
belong to the Red Mountain R.R., a switchback line off the summit of my HOn3
Colorado R.R.. I got an email back from Frank @ Sergent last night, and he said
I would have no compatibility issues mixing the Sharon's with SBEC87P130K's. I
plan to use the sbec's as pilot couplers on my rod engines. All my loco's are
DeadRail, so I don't have to worry about electrical shorts if I double head the
hill. :-) He also said he can supply the bulk (144) pack of RNC87K's. Said just
order the B's, and send an email stating I really want the C's.