New Bachmann 4-6-0 (19th century version) info?

[Chris333]

Union Pacific 1010 does not have evenly spaced drivers and looks like a much smaller boiler.
https://d37tikmwcb2tc.cloudfront.net/railroad/image/Bachmann_51470_1_1.jpg

This loco from 1939 looks like a modernized version of it:
https://www.facebook.com/photo?fbid=27716096427981914&set=a.524742344210690

This loco has much bigger drivers:
https://picryl.com/media/union-pacific-no-1434-4-6-0-2d0d21

This one looks close:
https://picryl.com/media/union-pacific-no-1471-4-6-0-ac39ee
"U.P. 1471, 4-6-0, at Ellsworth, Kansas. February 1912"



So what actual drawings were used to design this locomotive?

[track1]

I can't share the original drawing, but it did not have road numbers or class numbers listed on it, only that there were two examples on the UP roster in 1895. It was in an antique book of locomotive plans from 1897.

Our original plans were to base the design on the B&O's "Thatcher Perkins", but the boiler diameter was too small for the motor selected, so we went in search of a period-appropriate engine that had a large enough boiler. We kept the UP road number as 1010 even though it's not an exact match as it had already been publicly announced.

[Dave V]

I feel like that in the age of 3D printing, new steam locomotives can also be viewed as chassis/mech bases for a variety of prototypes rather than being restricted to the model as-is. The question is whether the wheel arrangement, wheelbase, and driver size is close enough for the application.

[Iain]

Maybe a starting point for a few NS D class

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[Chris333]

I can't share the original drawing, but it did not have road numbers or class numbers listed on it, only that there were two examples on the UP roster in 1895. It was in an antique book of locomotive plans from 1897.

Antique Elements of Locomotive Engineering Volume 1 & 2 1897?

[pmpexpress]

Antique Elements of Locomotive Engineering Volume 1 & 2 1897?

Educational materials (i.e., not plan books) that were prepared for Students of The International Correspondence Schools Scranton, Pennsylvania, in 1897 Scranton The Collier Engineer Company published Elements of Locomotive Engineering Volumes I, II, III, and V.

Essentially, Volumes I and II were compilations of all of the Instruction and Question papers from the different International Correspondence Schools Technical Courses that were provided in half leather bound book form.

Volume I Covered Arithmetic Measurement Mechanics The Steam Engine With Piratical Questions and Examples

Volume II Covered Locomotives Dynamos And Motors

Volume III Covered Mechanical Drawing

Volume V Provided A Key To All The Questions and Examples Included In Vols. I and II, Except The Examples For Practice.

[Chris333]

I'd still like to know where the drawing came from. So I can buy the book and possibly have other drawings of interest.

Trying to find something 1935ish with 51" drivers. Adding an air pump and tank along with updated pilot will do wonders.

[up1950s]

So who is going to make the tender a powered "B" unit with matched speed to the front end ? Or a smaller tender swap out ?

[Chris333]

Once you get rid of that pesky DCC and sound the lower tender is simple.

[peteski]

Chris, didn't Neville, few posts above yours provide the book info you're seeking?

[Chris333]

Educational materials (i.e., not plan books)

Sounds like it is not drawings?  I dunno.

On ebay this is all I can find from inside the books:
https://i.ebayimg.com/images/g/6GwAAOSwfP9oC~CV/s-l1600.webp

[Chris333]

The P&LE had a bunch of small drivered 4-6-0's

50" drivers 18x24" cylinders.

[Chris333]

Oh Man!