Working diaphragms - Model Train Forum - the complete model train resource
Model Train Forum - the complete model train resource  

Go Back   Model Train Forum - the complete model train resource > Scale Specific Model Train Forum > HO Scale
Forgotten your password?

HO Scale Discussion of HO scale model trains.


Reply
 
Thread Tools Display Modes
Old 01-11-2012, 11:33 PM   #1
BionicJcs
Brakeman
 
Join Date: Jan 2012
Location: Deland, Fl
Posts: 167
Working diaphragms

So what are working diaphragms? I have several on my pullman cars, and they seem like they would flex or something, but I cant figure how they work. Are they supposed to couple up? And if so how do you get them apart for automatic uncoupling of cars?
BionicJcs is offline   Reply With Quote
Old 01-12-2012, 09:25 AM   #2
tjcruiser
Moderator
 
tjcruiser's Avatar
 
Join Date: Jan 2010
Location: Rhode Island
Posts: 14,682
Scales Modeled: HO ... and growing Lionel O
Images: 64
It might help if you clarify what brand/manufacturer, what specific cars, etc. Maybe add a photo?

Regards,

TJ
tjcruiser is offline   Reply With Quote
Old 01-12-2012, 10:00 AM   #3
raleets
Dispatcher
 
Join Date: Jan 2011
Location: Flint, MI
Posts: 2,254
Scales Modeled: HO
Quote:
Originally Posted by BionicJcs View Post
So what are working diaphragms? I have several on my pullman cars, and they seem like they would flex or something, but I cant figure how they work. Are they supposed to couple up? And if so how do you get them apart for automatic uncoupling of cars?
I have 7 Walthers Amtrak Superliner cars that are equipped with diaphragms that actually flex from side to side. When the cars are going around 24" or
26" curves they touch very slightly and the diaphragms "give" a little. If it didn't, the car would probably derail.
In real life the diaphragm acts as an enclosure and allows passengers to walk from car to car without being subjected to the great outdoors at 90mph. I know this to be fact 'cause I did Amtrak trips twice from Chicago to Tucson in the '80's.
Bob
raleets is offline   Reply With Quote
Old 01-12-2012, 02:01 PM   #4
BionicJcs
Brakeman
 
Join Date: Jan 2012
Location: Deland, Fl
Posts: 167
Yea, i know how the real ones work, but these models can be moved a little, but they dont extend or touch or anything. they are on Walthers cars, and on my Proto 2000 e-7 Hiawatha
BionicJcs is offline   Reply With Quote
Old 01-12-2012, 06:18 PM   #5
gc53dfgc
Station Master
 
gc53dfgc's Avatar
 
Join Date: Apr 2010
Location: Oh
Posts: 2,609
Scales Modeled: HO, O, G, N, OO
Images: 11
They are not designed to literally couple together rather just sit snug against each other and flex going around the curves of a layout if they are not to tight giving the real effect.
__________________
<----- One day I am going to build one of those trains
gc53dfgc is offline   Reply With Quote
Old 01-12-2012, 06:36 PM   #6
raleets
Dispatcher
 
Join Date: Jan 2011
Location: Flint, MI
Posts: 2,254
Scales Modeled: HO
Quote:
Originally Posted by gc53dfgc View Post
They are not designed to literally couple together rather just sit snug against each other and flex going around the curves of a layout if they are not to tight giving the real effect.
Presto! Right on the money!!
Bob
raleets is offline   Reply With Quote
Old 01-12-2012, 08:35 PM   #7
BionicJcs
Brakeman
 
Join Date: Jan 2012
Location: Deland, Fl
Posts: 167
Yeh i would have thought that, but all they do is just sit tight against the car and do nothing. You cant even "accordion" them out any. All they do is wiggle a little bit
BionicJcs is offline   Reply With Quote
Old 01-12-2012, 08:46 PM   #8
gc53dfgc
Station Master
 
gc53dfgc's Avatar
 
Join Date: Apr 2010
Location: Oh
Posts: 2,609
Scales Modeled: HO, O, G, N, OO
Images: 11
that is how they are designed. If they made them so they could truly fold out they would quickly fall apart, get stuck, or no longer be able to handle tight curves. I think the only place you will ever find true HO scale diaphragms would be for a museum quality piece to exact blueprints and full interior meant to never run or very seldom. Now a person could model it and i am thinking of doing that when I make my Blue Comet but it will be daunting.
__________________
<----- One day I am going to build one of those trains
gc53dfgc is offline   Reply With Quote
Old 01-12-2012, 08:50 PM   #9
BionicJcs
Brakeman
 
Join Date: Jan 2012
Location: Deland, Fl
Posts: 167
I hear that. Does seem silly tech to make it look that way when all they need is a black door frame. But it kinda does look like a bellows folded up, so maybe that's all they're after
BionicJcs is offline   Reply With Quote
Old 01-13-2012, 01:20 AM   #10
NIMT
Yard Master
 
NIMT's Avatar
 
Join Date: Jan 2011
Location: Three rocks south of the Sun
Posts: 5,522
Images: 35
It's also a matter of how much $$ you spend on your rail cars because my Super Liner cars do have working diaphrams that do couple together tightly with magnets and stay coupled on curves, but I run my cars on 48" or greater curves.
__________________
http://www.northidahomodeltrains.com
NIMT is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


» Visit These Sites:
LGB World

Or Our European Train Website ModelRailForum




All times are GMT -5. The time now is 12:16 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©2008-2013 Model Train Forum