Front bogie issue

[HenrikLego]

Hi, I'm in the process of making a 2-8-4 Dovregubben. Norwegian steam engine from the 1930s.

I have used a motorization technique by Flickr user Duq:

BR55 Drive train by Duq, on Flickr

But I have some issues with the front bogie:

Front bogie issues by henlorentzen, on Flickr

Front bogie issues by henlorentzen, on Flickr

Anyone who has some suggestions on how I could solve this?

[Daedalus304]

Ah, the problem is that your pivot point is too far forward. With your front driver axle being blind, and then your lead bogie pivot being a few studs ahead of that, it creates the rather extreme angle you've come across. I would replace those technic T-beams with something that lets you mount your pistons from a higher vantage point (Keep them at the same height, just put the attachment higher to free up some room) so that you can move your pivot point to as close to that lead axle as possible.

[PasDeChocolat]

Hi there,

I've just been trough that bogie nightmare. I found one solutions with a "floating pivot point".

You can see the details there... hope it helps .

[jtlan]

Right now your driver go (from front to back) Blind-Flanged-Blind-Flanged. Swap them to get Flanged-Blind-Flanged-Blind. This will make the front overhang better at the expense of the rear, but there are no pistons in the back to cause trouble. To deal with the increased angle at the back, lengthen the connecting link between the rear truck and the drivers, so that the link connects somewhere between the 3rd and 4th driven axles.

The BR55 is an 0-8-0 (UIC: D) wheel arrangement; porting Duq's solution without considering the new context (in a 2-8-4 / 1D2) is a recipe for disappointment. You did the right thing by trying this before you built any more of the locomotive though; I often see people who build a detailed body without thinking about how the chassis will work.