Author Topic: BLI P70 - Correcting Coupling Distance How-To  (Read 5474 times)

0 Members and 2 Guests are viewing this topic.

dem34

  • Crew
  • *
  • Posts: 243
  • Gender: Male
  • Respect: +63
Re: BLI P70 - Correcting Coupling Distance How-To
« Reply #105 on: September 29, 2019, 12:25:14 PM »
0
I'm a little surprised that MT or Rapido, with there demonstrated wizardry in casting tiny plastic parts to make up otherwise really great scale models of various passenger cars, haven't created a more refined, closer to scale, functional diaphragm. MT's heavyweights have diaphragms that are 'functional' in that they move when pressed, but they are too small to close the gap between cars, and they're too stiff to function properly even if they were in contact with each other.
Geoff
Costs, MT likes to keep their prices down as much as possible. And Rapido probably feels that most wont care and that adding it might push their prices too far. Guess its easy to just say that most people arent bothered by the lack of Diaphragms for it to be worth the cost.
-Al

NorsemanJack

  • Crew
  • *
  • Posts: 203
  • Respect: +19
Re: BLI P70 - Correcting Coupling Distance How-To
« Reply #106 on: September 29, 2019, 09:12:54 PM »
+2
Diaphragms are the afterthought.  Back on topic, coupling distance is the real issue.  If the coupling distance is close, the space between diaphragms is a minor issue.  If the distance is huge, I don't care what diaphragms are used; it's going to still look really stupid.  Exhibit A:  MT heavyweights.

Lemosteam

  • Crew
  • *
  • Posts: 4159
  • Gender: Male
  • PRR, The Standard Railroad of my World
  • Respect: +1322
    • Designer at Keystone Details
Re: BLI P70 - Correcting Coupling Distance How-To
« Reply #107 on: September 30, 2019, 10:59:13 AM »
+4
So I am developing multiple step/coupler pocket design that snap mounts an MT 2004 underslung coupler (screw optional) that is intended to provide a specifc dimension from coupler hood inside to the diaphragm face on the OEM surface.  I have the ability to adjust this dimension to space that and any other aftermarket diaphragms as close as possible.  Currently I am starting with this dimension at 1mm (providing a 2mm gap).

I have confidence that the 2mm gap will work on all track radii.

I plan to reduce the gap in 0.25mm increments to investigate exactly how close I can get them at various track radii and will lay these out in the days to come.

For those that only wish to improve the look of the steps individually, I now have these available here.




OldEastRR

  • Crew
  • *
  • Posts: 2647
  • Gender: Male
  • Respect: +319
Re: BLI P70 - Correcting Coupling Distance How-To
« Reply #108 on: September 30, 2019, 04:05:07 PM »
0
Really looking forward to a photo of a KyD step set installed.