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Author Topic: UP FEF with triple stacks  (Read 549 times)

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propmeup1

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UP FEF with triple stacks
« on: December 21, 2022, 05:58:55 PM »
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Ok lets pics some brains here. I've known for some time now but just didn't really look into it. UP had three FEFs with triple stacks. 835, 837 and 839. They remained that way till they were retired.

Can anyone shed some light on the reason for triple stacks and if it made a difference then the twin stacks.  I have three Kato FEF type. I made a grayhound of one not knowing they were gonna do it two years later and the other I will do the triple stack thing just to be different.

Thank you,
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C855B

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Re: UP FEF with triple stacks
« Reply #1 on: December 21, 2022, 06:12:13 PM »
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Apparently UP played around with smokestack technologies. While not addressing specifically the three-stack design, you can read through this and get the gist that these were apparently modifications of the multi-jet draft design.
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propmeup1

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Re: UP FEF with triple stacks
« Reply #2 on: December 21, 2022, 08:57:28 PM »
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Thank you for that interesting read and info.
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