ALL THINGS BIG BOY

Discussion of steam locomotives from all manufacturers and railroads

Moderators: Typewriters, slide rules

us.trains

Union Pacific Railroad (U.P.) class 4000 "Big Boy”.

Post by us.trains » Fri Sep 02, 2005 3:50 pm

Hi everybody.

I'm a french guy who fall in love with this fantastic machine, I find a lot of picture of this machine, but I'm afraid to miss some, so if you have beautiful picture of it, I'm very Interested.

I prefer "in action" pictures

For who are interested, my best pictures are here :

http://us.trains.chez.tiscali.fr/lien_t ... el.htm#bbr

rlsteam
Posts: 151
Joined: Sun Mar 14, 2004 10:37 am
Location: Hamilton, Illinois

Big Boys

Post by rlsteam » Sat Sep 03, 2005 11:04 pm

Visit my "Big Boys and Challengers Gallery," www.forecyte.com/bigboys , for some action shots in the 1950s.
Dr. R. C. Leonard, "Richard Leonard's Rail Archive" ( http://www.railarchive.net/ )

us.trains

Re: Big Boys

Post by us.trains » Sun Sep 04, 2005 2:15 pm

rlsteam wrote:Visit my "Big Boys and Challengers Gallery," www.forecyte.com/bigboys , for some action shots in the 1950s.
Many thanks for your link, very beautiful pictures as I like. Your web site is very interesting too I will explore it and link it in mine.

FourTwelveTwo

Post by FourTwelveTwo » Wed Sep 14, 2005 8:53 pm

Olivier,

Have you purchased "The Big Boy Portraits" book? It's a mixture of roster and action shots, but there are many angles and views not normally seen in other publications.

I share your love for these machines!

John

JeffK
Posts: 1626
Joined: Fri Mar 12, 2004 10:05 pm
Location: Western suburbs

Post by JeffK » Mon Sep 19, 2005 5:58 pm

Bonjour! Vous écrivez bien l'anglais - mieux que je puis écrire en français.

Comment se fait-il que vous vous intéressez aux locos américains?

x-press
Posts: 295
Joined: Mon Aug 16, 2004 11:32 am
Location: Baltimore, MD

UP Big Boy Steam Turret: Vents?

Post by x-press » Mon Jan 15, 2007 2:12 pm

Greetings:

In old 1950's footage I have seen of the UP 4000-class engines, an overhead view of the steam turret shows TWO vents releasing steam. Neither one is the generator, which is ahead and to the left. I know the blowdown separator is up there somewhere, but the "thing" I thought was the separator doesn't seem to be doing anything in the shot (no steam). One vent is located just ahead of the cab, the other just ahead of it and to the left, still on the dome.

Does anyone know what these are?

Thanks in advance!

JPS

tacomalarry

Big boy !

Post by tacomalarry » Tue Jan 23, 2007 1:00 am

I enjoy photos of Big boy and S.P. cab fowareds
Mr Stewart from tacoma

TRAINSFORBRAINS

bigboy drawings

Post by TRAINSFORBRAINS » Tue Feb 06, 2007 1:26 pm

http://www.uphs.org/index.html

I bought full drawings of the Bigboy about two years ago from the folks that put up this site. At the time I paid 30 dollars. I just went there and dont see the offer but if you contact them I'm sure they could direct you on how to purchase the disk. It contains all the mechanical drawings used to build the bigboys including drawings made obsolete during the process of constructing the series. I dont have the disk in front of me but there are hundreds of drawings on the disk. I'm sure your questions would be answered and maybe more questions would be raised. I love going through them to figure out how things work.

tacomalarry

Big Steam

Post by tacomalarry » Tue Jul 24, 2007 10:45 pm

I enjoy photos of big boy the Best UP made
big steam fan Lawrence

Dataview Publishing

Big Boy 4012 walk-around

Post by Dataview Publishing » Wed Oct 24, 2007 6:19 pm

For those who may be interested, I've posted a series of walk-around shots of 4012 on my blog at:

http://rrheritage.blogspot.com

Thanks!

Chris

Image

sheeju

Interactive virtual guide to big boy loco

Post by sheeju » Sun Dec 09, 2007 2:51 pm

hi


http://www.geocities.com/upbbloco


about big boy


regards

Interactive virtual guide to big boy loco

pennsy
Posts: 1697
Joined: Sat Mar 11, 2006 4:07 pm
Location: Southern California

Re: Union Pacific Railroad (U.P.) class 4000 "Big Boy”.

Post by pennsy » Sat May 09, 2009 5:10 pm

Got this one of # 4012. Enjoy. Had to give you a photo in full color.
You do not have the required permissions to view the files attached to this post.

joeburgard540
Posts: 7
Joined: Tue Oct 12, 2010 6:51 pm
Location: Texas

Re: UP Big Boy Steam Turret: Vents?

Post by joeburgard540 » Tue Oct 12, 2010 7:09 pm

I know this answer is a long time in coming...but here you go. :-D

The two plumes of steam coming from near the steam turret casing are the exhausts from the Pyle-National turbo-generator and the cold water centrifugal pump (mounted underneath the fireman's side of the cab). The centrifugal pump (Elesco type TP) pumped water from the tender to the exhaust steam injector (located underneath the running boards on the fireman's side of the smokebox).

Cheers
Joe
"If a nation expects to be ignorant and free, it expects what never was and never will be." Thomas Jefferson

joeburgard540
Posts: 7
Joined: Tue Oct 12, 2010 6:51 pm
Location: Texas

UP Class 4-8-8-4 "Big Boy" Maximum Cut-Off

Post by joeburgard540 » Tue Oct 12, 2010 7:14 pm

Does anyone know for certain what the maximum cut-off was for the Big Boys in both forward and reverse (if the figures are different)? I'd assume it would be about the same as Challenger #3985 since they both use the 12" ALCO Type "M" power reverse and had very similiar designs.

I just revisited #4018 in Dallas, but the cab is locked so I couldn't see the reverse quadrant. I asked one of the employees, but he didn't have the keys.

Are any of the reverse quadrants clearly visible on any of the Big Boys that are on display?

Thanks,
Joe
"If a nation expects to be ignorant and free, it expects what never was and never will be." Thomas Jefferson

Typewriters
Posts: 278
Joined: Fri Mar 12, 2004 8:29 pm

Re: UP Class 4-8-8-4 "Big Boy" Maximum Cut-Off

Post by Typewriters » Wed Oct 13, 2010 4:06 pm

Cutoff on the UP 4000's was 81% maximum, forward - haven't found a figure for reverse yet.

Comparable figures between the 4000's and the 3950-3969 include lap, lead and overall valve travel. RME lists the 4000's as having been equipped with ALCO Special Type H reverse, and the 3950's with Type H.

-Will Davis
Moderator- Steam Locomotives forum

http://www.railroadlocomotives.blogspot.com

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