Chairing of parallel-wing crossover

[Martin Wynne]

@Steve_Cornford @James Walters @Hayfield @Phil O @Phil G

parallel-wing crossover

even at present you can get most of the way there, as you can see.

the chairing conflicts at 1 can be resolved in several ways:

model:

file the corners off the chairs to clear. the sockets are clear, so it will work ok and barely notice;​

or skew the timber a bit to increase the chair separation.​

prototype:

most likely -- swap the L1 to an M1 which is 3/8" shorter at that end and would probably clear;​

or swap the CC to an L1CC if it doesn't.​

I haven't done either of those chairs yet, nor completed the chair heaving function to allow the swaps. I would likely be near to have that ready for an initial test by now, but for my accident. As it is it is going to take a while.

chairing errors at 2 and 3 on the lengthened BB chair for parallel wings need addressing too. at 2 there is no middle jaw, which needs adding as a slide-in insert similar to DD.

asymmetric AB/BB parallel-wing chairs are not yet done. the flaring error at 3 can be resolved by extending the flare bend clear of the chair jaw. the result at 4 looks fine -- I wouldn't be surprised if that's not a frequent prototype arrangement too.

Martin.

 

[Martin Wynne]

.
To explain how to create the above crossover, I will do a Zoom meeting, and post a recording. See:

https://85a.uk/templot/club/index.php?threads/more-plug-track-developments.792/

martin.