THE magazine of railroading

SEARCH TRAINSMAG.COM

Enter keywords or a search phrase below:

Diesel piston sizes?

2651 views
4 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    August, 2004
  • From: St. Paul, Minnesota
  • 1,865 posts
Diesel piston sizes?
Posted by Boyd on Monday, September 27, 2010 12:04 PM

Don't most 80s and newer diesel engines have pistons that are for a 12" bore?

Modeling the "FARGO AREA RAPID TRANSIT" in O scale 3 rail.

  • Member since
    December, 2001
  • From: Burbank IL (near Clearing)
  • 8,097 posts
Posted by CSSHEGEWISCH on Monday, September 27, 2010 12:15 PM

Here's the dimensions of which I'm aware:

EMD 567 - 8 1/2" bore and 10" stroke

EMD 645 - 9 1/16" bore and 10" stroke

EMD 710 - 9 1/16" bore and 11" stroke

Alco 244, 251 and GE FDL - 9" bore and 10 1/2" stroke

Baldwin - 12 3/4" bore and 15 3/4" stroke, last built in 1956.

Paul The commute to work may be part of the daily grind, but I get two train rides a day out of it.
  • Member since
    February, 2005
  • 1,401 posts
Posted by timz on Monday, September 27, 2010 3:30 PM

And it seems GE's Evo-or-whatever-they-call-it is 250 mm bore. So unless any switchers out there still have De la Vergne or Alco 539 engines, 12-inch bore is extinct in North America.

  • Member since
    January, 2009
  • From: Poulsbo, WA
  • 375 posts
Posted by creepycrank on Monday, September 27, 2010 4:32 PM

The GE FDL engine has a 9 inch bore and a 10 inch stroke like the ALCOs. The GEVO engine is 9.8 inches bore by 12.6 inches stroke which puts it over the theoretical piston speed limit for wear at the 1050 rpm rating. EMD's H engine is about the same but doesn't count as all are out of railroad service.

Revision 1: Adds this new piece Revision 2: Improves it Revision 3: Makes it just right Revision 4: Removes it.
  • Member since
    January, 2009
  • 11 posts
Posted by BLW ENGR on Tuesday, September 28, 2010 3:32 PM

Baldwin 12 3/4 x 15 1/2, not 15 3/4

Join our Community!

Our community is FREE to join. To participate you must either login or register for an account.

Trains free email newsletter
NEWS » PHOTOS » VIDEOS » HOT TOPICS & MORE
GET OUR WEEKLY NEWSLETTER DELIVERED TO YOUR INBOX
Connect with us
ON FACEBOOK AND TWITTER

Loading...