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 Post subject: Re: General Steel Castings Technical Drawings
PostPosted: Tue Jul 07, 2020 12:27 am 

Joined: Mon Jan 17, 2005 9:06 pm
Posts: 2305
Location: Thomaston & White Plains
In addition to the cast-in air reservoirs, there were integral pilot beams, compressor brackets, valve gear and crosshead guide brackets, etc. Amazing castings.

I recall being told (by an old-timer) that there was close to a 50% reject rate on the engine beds. The duds went right back into the melt pot.

Howard P.

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 Post subject: Re: General Steel Castings Technical Drawings
PostPosted: Tue Jul 07, 2020 9:36 am 

Joined: Sun Sep 14, 2014 5:05 pm
Posts: 1024
Modern welding technology has largely removed the need for such castings. One story I remember is a large pit casting was being poured and they noticed it was taking more metal than it should. Assuming the mold was leaking they kept pouring in hopes of saving the casting. Then someone ran in saying the sewer was on fire! The molten metal had broken into the sewer and filled the pipe for quite a ways.


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 Post subject: Re: General Steel Castings Technical Drawings
PostPosted: Tue Jul 07, 2020 10:22 am 

Joined: Sun Aug 22, 2004 8:31 am
Posts: 1205
Location: South Carolina
I recall one of my mechanical engineering professors talking about this but I didn’t know what a cast engine bed was at the time. He said they had to make multiple simultaneous pours to do these castings. The molten metal from a single pour would start to solidify before it filled the mold. It must have been a heck of a coordination effort.

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 Post subject: Re: General Steel Castings Technical Drawings
PostPosted: Wed Jul 08, 2020 2:35 am 

Joined: Sat Feb 05, 2005 1:05 am
Posts: 420
55 ton cast multiple throttle for super-critical power plant. Not quite as intricate as a frame or a loco throttle.

Attachment:
55-ton-casting.jpg
55-ton-casting.jpg [ 95 KiB | Viewed 271 times ]



Other examples of current large casting technology:


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 Post subject: Re: General Steel Castings Technical Drawings
PostPosted: Wed Jul 08, 2020 3:20 am 

Joined: Sun Apr 02, 2017 3:13 am
Posts: 65
3801's cast steel bed:

Image

Only bit of the loco not made in Australia, yes it was General Steel Castings Corp. Must have been fun importing them during WW2.


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