Took this time some inspiration from @johndrinkin and his art deco/retrofuturistic trains and some existing trains with smooth "bathtub" cowl appearance.
Here few versions of it with a slight forward and backward cowl and with standard parts and customs wheels that suits better  

With custom wheels that are slightly bigger XLL

https://www.bricklink.com/v3/studio/design.page?idModel=440333
With standard partlist 

https://www.bricklink.com/v3/studio/design.page?idModel=439655
Due too similarity of them here some other photos and angels 

Hoses job (it was painful and full of struggle but I`ve made it! )


Size comparison between desighn with custom wheels and sandart(sorter)



Been working on this for way too much time but got a few new ideas and some of them use as improvements for PRR GG1 family 
Maybe will try to make a "tank version" based on some German/Dutchland streamlined train (if not fall fully insane)

Edited June 7, 20231 yr by Darkkostas25
add link to bricklink

Wow! Love the Art Deco style here, would love Lego to do something like this.

20 minutes ago, Crazy bricks said:

Wow! Love the Art Deco style here, would love Lego to do something like this.

yeah we don't get enough representation from lego  trains from Streamline/art deco era except for good old Santa Fe 

On 4/30/2023 at 5:47 PM, Crazy bricks said:

Wow! Love the Art Deco style here, would love Lego to do something like this.

yeah we don't get enough representation from lego  trains from Streamline/art deco era except for good old Santa Fe 

Update!

Red Silver Arrow (tank engine)(Custom wheels)) (maybe do later variation with standard)

https://www.bricklink.com/v3/studio/design.page?idModel=439660

Red Silver Arrow (tank engine)(Custom wheels))

 

Apotheosis of rounded shapes, beautiful model and great construction technique!

8 hours ago, LEGO Train 12 Volts said:

Apotheosis of rounded shapes, beautiful model and great construction technique!

Thanks! 

I'm liking this, very clever working in this build. Thinking further, what would a railroad of that age have done? If this was part of a crack passenger train it would probably have a blunt rear end that continues smoothly into the coaches behind. This has more the feeling of second generation streamliners that were mostly diesels, e.g., a steam punk version of EMD FT or F3... or for the tank engine a BL2 might be more accurate with the bidirectional view.

On the mechanical side, the points of articulation in the side rods would likely cause problems. If this were to be built in real bricks a sandwich of 1/2 thickness technic beams would be the best purist solution (and a custom rod non-purist, grin).