My N&W class A 1239 (gauge 5", 1 in 10 scale)

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Asteamhead
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Location: Germany, Duesseldorf

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Wed Feb 20, 2019 3:30 pm

Hello friends,
We had a great weekend at Dresden :D . For the curves of the layout were a little tight for my A, I had it steaming on a roller board. Much better for the interested visitors to see her life directly in front of their eyes 8) instead down on the floor (so I think).
We had her working there at both low speed and full throttle with working stoker :wink: . You can imagine the cinders thrown out off the double stack! The Y6b of steamchris was coupled to the tender but not under steam due to the lack of a second roller board.
All the best by
Asteamhead
Attachments
A cab, working stoker red.jpg
A Cab view with working stoker
A firebox, working stoker red.jpg
Firebox flash to be see from the side

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Steamchris
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Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Steamchris » Fri Feb 22, 2019 12:42 am

Hey Steamers,

yes the exhibition at Dresden was Fun.
We also had the J runing with Air and our Y6b and our narrow gauge Loco on display, on the tracks we moved our freelance 0-4-0. Here a video

https://youtu.be/zD9BXPKsXhs


all the best
Chris
The light at the end of the tunnel could be a train ;)

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Asteamhead
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Joined: Tue Jul 31, 2012 1:59 pm
Location: Germany, Duesseldorf

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Sat Jun 22, 2019 4:31 pm

Hello friends,

After spending almost a year to paint my old DB class 44 and bring it back to life, I started finishing my A again :D .
First project are the two Westinghouse CC air pumps.
The cylinders were sand casted of bronze. The mold included a shaft which made centering in the lathe quite easy :idea: . The the LP bore of diameter 35 mm and the front side were turned first. Then a shaft of precise fit is used for both turning the back side and milling the HP bore of 22 mm. All threads will be bored on the turntable, too.
Just 2 steam passages will be bored into the cylinder body. All the rest can be bored into the upper cyl. cover.
Thus there will be not flat (paper or ptfe) sealings, just 2 O-rings between cylinder and upper cover :idea: .
To be continued!
Asteamhead
Attachments
A CC-air pump, cyl._1939red.jpg
CC air pump, cyl. on the lathe
A CC-air pump, cyl.._1936red.jpg
CC air pump, cyl. on the mill (turntable)
44 1167 fuel at DBC-T_1846red.jpg
44 1167 fuel ready to steam

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Andypullen
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Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Andypullen » Sun Jun 23, 2019 2:55 pm

Beautiful work Asteamhead!

I'm looking forward to meeting you and Chris in about 6 weeks!

Andy
Clausing 10x24, Sheldon 12" shaper, ProtoTrak AGE-2 control cnc on a BP clone, Reed Prentice 14" x 30", Sanford MG 610 surface grinder, Kalamazoo 610 bandsaw.

gamh44
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Location: Australia

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by gamh44 » Tue Jun 25, 2019 6:46 pm

Asteamhead

Very much looking forward to seeing how the CC pumps turn out. Look great so far. Please provide as much detail as you are willing!

Geof

Asteamhead
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Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Wed Aug 21, 2019 3:13 pm

Hello Geof,
Now there is some progress with my CC-air pumps. Method of making might be of interest to other modelers, too :?:
The sand casted steam cylinders made of bronze worked out as intended. The idea of casting a mandrel :idea: helped a lot turning the LP bore and the bottom side very precisely. For turning the other surface and drilling the flanges I used a seperate mandrel and the turntable for precise centering. The HP bore was made the same. Please see photos.
To avoid any sort of flat sealings in favour of O-rings throughout :) , I decided to turn :idea: the covers from flat bronze. Thus the LP seat including a grove for an O-ring is a bit enlarged to be used as mandrel :idea: . The separate HP seat will then be inserted to achive precise centering.
Steam chanals will part of the cover plate. Just two chanals to the lower side of the steam cylinders will need O-rings between the cover plate including the valves and the steam cylinders. This method worked fine already with both the stoker engine and the pwer reverse :D .
Construction of the piston valves- similar to those of the prototype -is underway and will be made next. Some ideas are still pending.
Construction of the tiny air valves has been started, too. For I have some experience with my working air pump of my DB class 44, this somewhat difficult job might be solved, too.
Some more photos to follow.

Asteamhead
Attachments
CC- drilling the steam cylinder_2055red.jpg
CC-air pump, drilling the steam cylinder
CC-Air pump, milling the HP steam cylinder_2053red.jpg
CC-air pump, milling the HP bore
CC- turning the cover plate with grove for the O-ring and mandrel_2058red.jpg
CC-turning the cover plate with grove for the O-ring and the mandrel
CC- finishing the outside cover_2062red.jpg
CC finishing the outside cover by means of the mandrel
CC-milling the cover_2069red.jpg
CC-milling the cover plate

Asteamhead
Posts: 412
Joined: Tue Jul 31, 2012 1:59 pm
Location: Germany, Duesseldorf

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Wed Aug 21, 2019 3:19 pm

Some more photos of making the CC-air pumps.
Have fun!
Asteamhead
Attachments
CC-steam cylinder with cover plate_2078red.jpg
CC-steam cylinder with cover plate inserted
CC-steam cylinder with cover. (Mandrel not removed yet)_2074red.jpg
CC-steam cylinder with cover. Mandrel not removed yet
CC-steam cylinders with cover plate, O-ring inserted.  Mandrel not removed yet_2077red.jpg
CC-steam cylinders and cover plate, O-ring inserted

gamh44
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Location: Australia

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by gamh44 » Thu Aug 29, 2019 4:21 am

Asteamhead

Thank you so much for these details. The photos are great and you are making steady progress. Are you planning on using superheated steam? If not, how will you drain the cylinders?

Geof

Asteamhead
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Joined: Tue Jul 31, 2012 1:59 pm
Location: Germany, Duesseldorf

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Thu Sep 26, 2019 4:17 pm

Hello friends,
Progress had been slowed down due to several steam events which called for a visit, sorry :( .
Here are some more photos of making the air cylinders of those CC-pumps. Same method used as with the steamcylinders. Bores were made a bit smaller (30 / 20 mm) to achieve safer action at medium steam preasure. The air valves will be made as separate parts inserted into the cover plates by means of a thread.

And remember there is a lot of steam around the world which isn't 'Big Boy :) '. Thus we had a pleasant steam meeting at Apeldoorn (Netherlands) where VSM showed 3 (!) locomotives of DB series 23, all under steam :!: Another 8 steam locomotives of different series were running some trains all the time.
So much fun, when I got the rare opportunity of a cab ride, too 8) .

All the best by Asteamhead
Attachments
A CC-Air pump, turning the sand casting_2129red.jpg
Turning the flange by means of the mandrel as part of the sand casting
A CC-Air pump, turning the LP bore_2132red.jpg
Turning the LP cylinder bore and seat for an O-ring
A CC-Air pump, air cylinders_2137red.jpg
Air cylinders being turned and drilled
VSM 3 former DB class 23 under steam _2103red.jpg
VSM: 3 locomotives of DB class 23 under steam!
VSM cab ride on DR class 50_2092red.jpg
Cab ride on DR class 50

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JBodenmann
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Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by JBodenmann » Thu Sep 26, 2019 7:17 pm

Hello Asteamhead. Very cool, and a cab ride too. What is the wheel arrangement of the type 23 locomotives. I always liked German steam.
Jack

Asteamhead
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Joined: Tue Jul 31, 2012 1:59 pm
Location: Germany, Duesseldorf

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Fri Sep 27, 2019 3:43 am

Hello Jack,
Yes it was, indeed! The VSM / NL has up to 11 steam locomotives, some guests come to that special meeting every first weekend of September.
Those 105 pieces of class 23 engines were produced in the mid-50s as modern (and last) replacements for elder steam locomotives.
Their wheel arangement was 2 - 6 - 2. Roller bearings and open economizer systems made them quite modern. The last went to storage back in 1976.
Wulf-Dieter
Attachments
VSM 23 071, 076 at Loenen_2118.JPG
VSM 23 071 and 23 076 at Loenen NL

Asteamhead
Posts: 412
Joined: Tue Jul 31, 2012 1:59 pm
Location: Germany, Duesseldorf

Re: My N&W class A 1239 (gauge 5", 1 in 10 scale)

Post by Asteamhead » Fri Oct 18, 2019 12:44 pm

Hello friends,
Here is some more progress constructing the CC-air pumps for my A.
Same method as desribed above just a bit more complicated due to the air valves to be inserted. Use of the mandrels instead a vice makes it a lot easier to both fix the parts when milling and to find the center and correct position before start drilling :D . All w/o a CNC mill 8)
As with the prototype the air valves will be constructed as sets :idea: . These are inserted into threads, sealed by O-rings. All air chanels are to be drilled into cylinders and cover plates - diameters just 2 mm. Thus the intermediate lantern of the pump is constructed of seperate parts rather than casted. These parts will be turned, drilled and milled separately before silver soldered to the final piece.

All the best
Asteamhead
Attachments
CC-pump, air cyl. with covers_2162red.jpg
CC-pump, air cylinders with cover plates
CC-pump, milling cover by means of a mandrel_2156red.jpg
CC-pump, milling cover plate
CC-pump, milling cover on the turntable_2154red.jpg
CC-pump, milling cover on the turntable
CC-pump, drilling a valve seat by means of a mandrel_2142red.jpg
CC-pump, drilling a valve seat by means of a mandrel

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