This is indeed brilliant work.

Posted by Akshay Marathe on 2009 May 29 10:34:11 +0000

Very nice. As to displaying it, I think the CPRO of your zone/ PRO of your division would be able to help you out.

Posted by Manish on 2009 May 29 10:17:22 +0000

This is a good example of fusion of rails using the alumino-thermit process. Here a prefabricated mold is placed in between the rails and the whole assembly is pre-heated. A mixture of aluminium and iron oxide is ignited using magnesium, which results in an strongly exothermic reaction in which oxygen from iron is exchanged to aluminium.

Fe2O3 + 2Al -> 2Fe + Al2O3 + Heat

The molten iron is now poured in the mold which has a sprue (from where the hot metal is poured), mold cavity containing the rails to be fused and a runner (from where the molten metal rises up to indicate the filling level in the mold). The cylindrical structure that you see in the image is either a sprue or a runner, and most likely in my opinion a runner. An identical cylindrical portion should also exist on the other side with a basin which acts as sprue which receives the metal. Hot metal is NOT poured in the gap between the rails directly.

Lastly, this interesting technology is in fact very...

This is a good example of fusion of rails using the alumino-thermit process. Here a prefabricated mold is placed in between the rails and the whole assembly is pre-heated. A mixture of aluminium and iron oxide is ignited using magnesium, which results in an strongly exothermic reaction in which oxygen from iron is exchanged to aluminium.

Fe2O3 + 2Al -> 2Fe + Al2O3 + Heat

The molten iron is now poured in the mold which has a sprue (from where the hot metal is poured), mold cavity containing the rails to be fused and a runner (from where the molten metal rises up to indicate the filling level in the mold). The cylindrical structure that you see in the image is either a sprue or a runner, and most likely in my opinion a runner. An identical cylindrical portion should also exist on the other side with a basin which acts as sprue which receives the metal. Hot metal is NOT poured in the gap between the rails directly.

Lastly, this interesting technology is in fact very old and is called the "Goldschmidt reaction" or "Goldschmidt process" after the German chemist Hans Goldschmidt, who discovered in 1893.

Posted by M S M Saifullah on 2009 May 29 10:16:44 +0000

Interesting capture of semaphores and catenary together.

BTW, Varuna appears to be missing one SLR.

Posted by Manish on 2009 May 29 10:13:32 +0000

Looks like molten steel is poured in the gap and extra piece chopped off.
What are the charactesitics of this steel to ensure uniform expansion / contraction with temperature changes. Do they melt some existing rails an pour it in the gap? thanks for this interesting piece of IR technology....

Posted by Milind on 2009 May 29 09:26:20 +0000

Apologies for the iron grills as I shot from a partially constructed flyover without any side walls. I have cropped the photo at the bottom which otherwise is somewhat scary to see.

Posted by Samar on 2009 May 29 08:34:18 +0000

Nice shot

Posted by Arvind Yadav (guest) on 2009 May 29 08:06:36 +0000

yes, I also suggest you to develop msts models. It will be really very great. You have done a really great job here. It looks real. Just imaging how it would look if the engine is used for msts

Posted by N.Prakash Prasad (guest) on 2009 May 29 07:11:10 +0000

Saifullah sir, excellant shot...

Posted by Krupa Ratnam on 2009 May 29 06:26:44 +0000

Nice pic.

Posted by Ashish (guest) on 2009 May 29 05:17:09 +0000