Date   

Re: Machining car end?

destorzek@...
 




---In STMFC@..., <hockenheim68@...> wrote :

Dennis,

With one of these car end moulds, after you were done mopping up in the XY did you polish afterwards using a variant of the original tool paths? I've never seen a mould or pattern polished and I'm curious how it is accomplished when it is needed. Is it a matter of ramping into the work and in effect preloading the headstock a tenth or two  while the machine does its magic or something else altogether?
===============

I don't, but I'm not sure that directly answers your question, Since I cut very little directly into the cavity. Maybe Brian Leppert will take a stab at this, as I believe he does more 'hard milling'.

We are mostly an EDM shop (Electro Discharge Machining) so what I'm actually cutting are graphite electrodes that will be used to "sink" the cavity through a controlled erosion process. While the process is designed to erode the steel, it also erodes the graphite, albeit much more slowly, so that tends to obscure the tool marks. The process also leaves a consistent matte frosted finish on the steel.

Any surface that needs a higher polish for release purposes is "benched", polished by hand starting with diamond files, on to fine stones, and sometimes continuing with diamond polishing compound.

The same holds true with cavity work that is cut directly, which in our shop is mostly aluminum. This material is sufficiently soft that the diamond files aren't needed, but fine stones make quick work of the tool marks.

Dennis Storzek


Re: Machining car end?

hockenheim68
 

Dennis,

With one of these car end moulds, after you were done mopping up in the XY did you polish afterwards using a variant of the original tool paths? I've never seen a mould or pattern polished and I'm curious how it is accomplished when it is needed. Is it a matter of ramping into the work and in effect preloading the headstock a tenth or two  while the machine does its magic or something else altogether?

Thanks for your input thus far.

Andrew Hutchinson
Surrey BC Canada


Fascia & Industry

rdherrick@...
 

I have at least one industry that will extend to the front edge of the layout and I can either treat it as a cross section and show the interior or run the fascia up to the roof. There was a discussion on this awhile back, but I don't recall where and I haven't located it in the archives of this group yet. Neither looks right to me, but what is your experience?


Thanks,


Bob Herrick


Southern 40' Flat Cars

Garth Groff <sarahsan@...>
 

Friends,

I've been looking for Southern 40' flat cars for my small layout. I would love one of the Lenoir-built 1926 flats with the shallow fishbelly sides. I know these were once offered by one of the smaller resin manufacturers, but are no longer around.

While looking through the Southern's 1962 general arrangement drawings at http://southernmodeler.info/SRrollingstock/SR_FRT_CAR_DGMS_1962.pdf , I stumbled on two other possibilities.

Drawing 50 is for a 50-ton fishbelly car with a 40' 6" length over the end sills, and 12 stake pockets. Truck centers are 30' 5 1/2". These were numbered 116600-116699 and 116700-116849. Both blocks were built by AC&F in 1925. The trucks are listed as "cast steel", and are on drawing SF-2259. There were still 155 of these left in 1958.

Drawing 51 is also a 50-ton fishbelly car with a 41' 6" length over the end sills, and 12 stake pockets. The truck center is a slightly longer 31' 5 1/2". This group was 116850-117349 built by the Southern itself in 1926. The drawing does not specify the type of trucks; the type is simply listed as "old". There were 308 left in 1958.

I am interested in these cars because the drawings are visually similar to the Red Caboose 42' flatcar, right down to the 12 stake pockets. According to Richard Hendrickson's article in the January 1997 RMJ, cars built to, or similar to, the USRA design ranged from 40' even to 43', with all sorts of lengths in between. It is perhaps telling that no Southern cars appear on his list. Are they all that different?

It appears that there are some minor differences in the pocket spacing over the trucks, but this could be changed, or it might not be worth monkeying with. I definitely favor the 116850 block as a better choice by length. Perhaps some of our Southern gurus might comment on the suitability of the RC model for a layout-quality representation.

Yours Aye,


Garth Groff


Re: Machining car end?

grangerroads@...
 

Dennis, yep, your description of 2-1/2D milling is how I cut contours. To the touch, I can feel no ridges on the rounded surfaces I've cut, and they look great. I'll likely cut the Dreadnaught end from a block of machinable wax to ensure the tiny cutters don't snap all over the place.

My problem is how to CAD draw a square corner (early) 4/4 Dreadnaught end (is EDE correct?) so that I can extract cutting paths from it. I'll have to make an attempt from the 1943 CBC drawing, I guess, since I wouldn't know where to get an End Detail drawing of  the early 4/4. BTW, thanks much for helping me out, always much enjoy reading about your model-making processes. I learn a ton from your postings.

Andrew, CamBam, I will take a look at it. I've got FlashCut hardware and software for machine control, works great for me. Just now checked . . . FlashCut expects to offer a 3D version "soon." Among the offerings on its page are Rhino Cam. Since I have Rhino CAD, maybe I should break down and get Rhino CAM. Hate to see what it will cost. And what it will cost in time learning.

Sure do appreciate your mentioning CamBam though, thank you much.

Brian Chapman
Cedar Rapids, Iowa


SOLD: Tank & House Car Placards

Michael Gross
 

Five of the nine steam-era freight car placards offered last Friday have sold.  Please contact me off-group for a list and photos of what remains:  ActorMichaelGross AT gmail DOT com


Cheers!


Michael Gross

La Cañada, CA



New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake cover.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : Cover for AB brake equipment Part Catalog


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20cover.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 2.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 2


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%202.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 3.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 3


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%203.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 4.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 4


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%204.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 5.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 5


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%205.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 6.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 6


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%206.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 7.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 7


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%207.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 8.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 8


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%208.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 9.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 9


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%209.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 10.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 10


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%2010.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 11.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brakes page 11


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%2011.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


New file uploaded to STMFC

STMFC@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the STMFC
group.


File : /AB brake page 14.jpg
Uploaded by : brianleppert@... <brianleppert@...>
Description : AB brake page 14


You can access this file at the URL:
https://groups.yahoo.com/neo/groups/STMFC/files/AB%20brake%20page%2014.jpg


To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398


Regards,


brianleppert@... <brianleppert@...>


Enhanced HO kits for post-war KCS 40' box car

Andy Carlson
 



Hi folks-

I have 2 of the following kits made with parts gathered together to more accurately model a KCS 40' AAR post-war box car. KCS 18014, photographed in 1952, is pictured in RPC #8 on page 87.

The 1947 built KCS car is a 10'0" IH box car. A suitable start would be an Intermountain undec kit #40799, the 1937 AAR box car with an inside height of 10"0". This kit, though, has the wrong ends, roof and doors.

Each enhanced kit includes;
1 IMRC #80799 '37 AAR undec box car kit
1 pair of IMRC 3/4 Improved Dreadnaught ends with poling pockets
1 Red Caboose Murphy raised panel roof
1 IMRC etched metal Apex running board
1 pair of South West Models 5-6-5 Improved Youngstown Doors
1 Wegmann detail set includes power brake mounting bracket, running board end supports, Ajax power brake and step and other details
1 Wegmann/Details West AB brake set

Offered for sale at $32, shipping included to US addresses. Contact me off-list (Please) if interested, at .
I accept checks and money orders. For a small fee, I also accept PayPal.
Thanks,
-Andy Carlson
Ojai CA





"AB" Brake Help

Guy Wilber
 

Dave wrote:

"AB Valves. Just the dimensions that make up the boxy shapes would probably do as I’m pretty sure I’m just going to plumb the pipes right thru the sides w/o worrying about the various fitting faces."

Dave,

Currently there are numerous WABCo "AB" Brake manuals at Abebooks ranging from 5 bucks to about 15. These don't contain the actual dimensions of the components but do offer both great photos and schematics. Knowing set dimensions between the mounting positions of the reservoir can be used to extrapolate dimensions for the three basic components.

Another option would be to purchase a Grandt Line O scale "AB" set (Part #3049) and use it for scaling. The set is beautifully done and quite accurate.

Regards,

Guy Wilber
Reno, Nevada

56801 - 56820 of 196997