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

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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 » Tue Jan 30, 2018 7:25 pm

Hello friends,
The cab is well on the way now. I decided to drill and set about 500 rivets (1.4 x 6 mm which is about 1/16 ", made of copper) :) . All the drilling was made by using the x / y scales of my mill. Construction was made first of course by means of drawings and some photos.
The angles which were both 2 1/2 x 2 1/2 " and 2 x 2 " at the prototype were made of 10 x 10 x 1 mm sqare profiles :idea: .
The half round profile which surrounds the roof was turned of 3 mm round material and then bent to fit. All was made of stainless steel.
To help TIG weld those profiles onto the roof there are some cooling profiles made of copper :D . Hope, this will be fine!
All the angles are to be riveted to side walls and on top of the roof, a lot of work yet.
Part of the roof will be cut out (removable) for conveniant and safe handling the throttle, power reverse, brake handle, valves and gauges in the cab.
Cab windows and other stuff will be added, too.

Best regards
Asteamhead
Attachments
A cab, angle profiles and tools for TIG welding red_0861.jpg
The angles were drilled first then milled
A cab, drilling the rivet holes (start) red_0824.jpg
Equal distances were achieved by using the mill's scales
A cab, cutting the angles which were drilled in pairs red_0843.jpg
Drilling and milling in pairs to save some time
A cab, side walls the left one with all the angles riveted red_0867.jpg
Some parts will be mounted by 2 mm hex srews instead of rivets
A cab, side wall with all angles riveted (1,4 x 6) red_0875.jpg
I like the rows of tiny rivets quite like those of the prototype

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 » Sat Feb 03, 2018 12:29 pm

Hello friends,
There are some more photos regarding that somwhat critical TIG welding job of the A's cab roof made of stainless steel 304L.
The make of the half round profiles intended to being welded onto the edges of the roof was shown in my last post.
To weld those tiny profiles onto the roof sheet of 1 mm wasn't an easy job to me. Thus I prepared some cooling rails made of copper to avoid burning off the profiles by accidant during the weld process. The TIG welder with puls function :D was adjusted to just 20 resp. 60 A to achive best results. Just one trial ... No option to solder on these profiles due to long time stability - just my opinion. Next locomotive will be built of brass, I believe :lol: !
Next step will be more fun: To set some 300 rivets yet to mount angles and rails onto the roof! But before assembly of all those parts, the necessary cutouts for save handling both the engineer's and firemen' side still are to be made.

Soory for I had some serious problems to attach photos and comments :?

All the best by
Asteamhead
Attachments
A cab, welding the front roof edge_red0877.jpg
A cab,TIG welding the roof edge_0879.JPG
A cab, welding the corner of the roof_red0883.jpg
A cab, halfround profile welded onto front of the roof _red0890.jpg

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 » Mon Feb 19, 2018 8:07 am

Hello fans of the N&W,
With some intensive work the parts for the A's cab are done now. It might be of interest how to mill big a radius on a quite small mill by means of a turntable. Using a very sharp tool and high speed in combination with milling chips of just 1/100 to max. 1/64 per round was successful.
To mill the iner and outer radius' precisely, I drilled 6 bores into the Sheets first to take them on the turntable in a safe manner :idea:
Holes for the rivets were drilled concentricly by the same method then.
The final rivets will be set as last step.

Harold: Works again, thank you!

Asteamhead
Attachments
A cab, milling the iner radius of the front wallf on the turntable red'_0898.jpg
The sheets are fixed to the smaller radius now
A cab, drilling the rivet holes on the turntable red_0900.jpg
Drilling by using the center of the bigger radius. Equal spaces achieved by means of the divider scale. Milling of the outer radius done
A cab, drilling rivit holes red _0903.jpg
Drilling rivet holes by x-y positioning. Both radius' are to be seen.

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

Post by Steamchris » Mon Feb 19, 2018 12:20 pm

Hi,

WUNDERBAR!!!!

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

Health and Safety Notice

due to the current economic circumstances , the light at the end of the tunnel
has been switched off !

Harold_V
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Location: Onalaska, WA USA

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

Post by Harold_V » Mon Feb 19, 2018 3:59 pm

Asteamhead wrote:
Mon Feb 19, 2018 8:07 am
Harold: Works again, thank you!
You're welcome, but it should be understood that I am just the messenger. Mike, who owns the board, has done an exceptional job of keeping it functioning properly.

H
Wise people talk because they have something to say. Fools talk because they have to say something.

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 » Mon Mar 19, 2018 4:01 pm

Hello to all modelers,
Some more parts to complete the A's cab are done. Time to have a close look to the inside of the cab, now. So many parts and fun just to make the slide windows f.e. 8) The inside of the cab is inviting to run that engine by an alert engineer, isn't it :D ? Some parts are still missing yet, but to allow free acceess to each valve or handle of some importance (remember the HT-stoker) isn't an easy job. The rear wall and the roof are getting th necessary cut outs for conveniant and safe handling.

Asteamhead
Attachments
A cab, parts for the slide windows_0982 red.jpg
A lot of tiny parts, very similar to those of the prototype
A cab inside with slide windows_0989 red.jpg
The engineer's side is almost finished despite the brake stand and the wooden floor
A cab inside in the dark_0993 red.jpg
Come, climb onto the engineer's seat to grab the throttle!
A cab, milling the cab floor_0953red.jpg
Lots of rivet holes
A cab seat, casted with brass inserts for fixing_0935red.jpg
Seat casted of lead - simple and adding 3 Pounds each

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 » Sun Mar 25, 2018 3:08 pm

Hello friends,
The cab is finished now. A lot more work than estimated before due to hundreds of bores, rivets and tiny srews.
Some of the photos taken during the manufacturing process may be of interest to other modelers. No CAD / CNC - just simple machine work!
The roof is fixed by just 6 small srews to the side walls of the cab in favour of easy axcess to valves and other parts :idea: . Some trials by means of cardbox dummies resulted in the cutouts as done. Good axcess to each of the valves and handles,free sight on the water glases and minor risk of getting hurt in curves ore even in case of derails was mandatory! And the looks from aside will not be disturbed that much :D .

Asteamhead
Attachments
A cab roof_1014 red.jpg
Some (dummy) rivets are still missing in case of changes if necessary
A cab roof, milling the cutouts_1003 red.jpg
Milling the cutouts wasn't an easy job on that small mill!
A cab roof, milling the ventilation covers_1010 red.jpg
Slide covers were made of 0.5 mm stainless by bending the edges about 150° before pressing around a band of spring steel. To be done very easily!
A cab, milling the slide windows in pairs_0999 red.jpg
Windows were made of 1/8 " Pertinax (pressed paper) by high speed milling. Concentration on the Job was necessary, believe me!

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NP317
Posts: 1916
Joined: Tue Jun 24, 2014 2:57 pm
Location: Northern Oregon

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

Post by NP317 » Mon Mar 26, 2018 9:33 am

Beautiful work, as always. I appreciate seeing your solutions.
On my Mikado I'm finishing cab plumbing now, and already thinking about how to make the cab roof and access openings.
This is a 3-D chess game.
~RN

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 » Sat Mar 31, 2018 4:33 pm

Thank you, NP317!
Just let me show you one more photo of the firemen's side of the A. Now it's ready to go, too :)
The seats were casted of lead :idea: (to increase friction weight by about 6 pounds).
The stoker's lubricator is hidden under the left seat.
Another photo is showing the sight and access to the rider (forget about that cross bar of the case).

Asteamhead
Attachments
A firemens's side_1028.jpg
Valves and handles from top are:
6SA feedwater pump, main steam for stoker jets, blower, main steam for stoker engine and the ashpan water sprayer. The stoker reverse handle is to be seen in front of the seat, the 5 stoker jet valves are on the right side.
It's similar to the locations on the prototype.
Feel invited to be home!
A sight and access to the rider_1036red.jpg
Rider's sight and access (forget about the cross bar of the case to be seen in the foreground)

765nkp
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Location: st louis, mo

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

Post by 765nkp » Mon Apr 02, 2018 11:19 pm

Amazing work, great detail. Thanks for all the pictures and info you have posted.

Tim

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 » Tue Apr 17, 2018 3:48 pm

Thank you Tim for your interest!
Tomorrow the A will be shown on the exhibit 'Intermodellbau Dortmund' running on air. Thus I worked a little harder during the last weeks to get it completed.
Here's a photo of the driver's side of the cab including the 24-RL brake stand. The (upper) independent brake is worked by boiler steam by means of a simple valve. The (lower) train brake is intended to run directly on air using a reduction valve. A fully independent brake could be installed, but is no common practice in our size.
Making of the covers of the washout plugs by use of a simple tool may be of interest.

All the best by
Asteamhead
Attachments
A cab, driver's side with 24-RL brake vale_1084red.jpg
Divers side with throttle, brake, injector and power reverse handle in place
A covers for wash out plugs with tools_1061red.jpg
Raw sheet, round plate and formed cover plates with tools
A covers for wash out plugs, result_1075red.jpg
A job of just 3 hours
A turning the cover plates_1055red.jpg
Raw plates fixed in the tool, turned to desired diameter
A covers of washout  plugs,_1089red.jpg
Look of the firebox with covers

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 » Thu Apr 19, 2018 1:57 pm

Hello,
one more photo from the first day of the actual exibition at Dortmund. The A is running onthe stage by air.

Asteamhead
Attachments
A Intermodellbau Dortmund  2018 red.jpg

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