Black Diamond Society of Model Engineers


Come See Our Trains in Action


902 East Macada Road, Bethlehem, PA 18017

Contact info

    The Black Diamond Society of Model Engineers, Inc. (BDSME)

has been an incorporated club since March 15, 1965.

Actually, our history goes back before that when the group

was located in the YMCA in Bethlehem, then Hellertown, then Easton.


Nevertheless the BDSME has been around for over 50 years!!



BDSME 2022 Timetable


BDSME Info...

The first floor 650 square foot layout features models of O, On30 and S scale steam trains from the glory days of railroading to the mighty diesel locomotives of today, including prototype sights and sounds. Operating semaphores and signals further enhance the display. Visitors can even operate specific accessories.

The second floor 800 square foot HO scale display has a multitude of trains in operation, including a loaded coal train stretching to more than 100 cars powered by multiple diesel locomotives winding through mountain scenery. A miniature trolley travels between a village and a distant amusement park with both an operating ski lift and rides. Visitors can operate the park train, too


Why not drop by on a Tuesday evening and join in the fun of Model Railroading?

BDSME Contact Line: 610-974-9718


About our Society...

BDSME Membership InfoBDSME Membership Form

BDSME 2022 Timetable

BDSME 2022 Railroad Days Flyer Link

Past Years TRAIN SHOWS (Photos)


We meet Tuesday evenings at 7:30p.m. The Public is always welcome. The first Tuesday of each month is a business meeting. The other Tuesdays are either work or operating sessions. Membership in our Society is open to all persons with an interest in model railroading. Memberships are available starting at $15.00 a year. For more information, click on the links below, drop by on a Tuesday evening or send us some email. We would love to hear from you.



Incorporated as a nonprofit organization in March, 1965, the Black Diamond Society of Model Engineers was formed from the nucleus of previous model railroad clubs in the area dating to 1948. Our membership has many vocations but as rail enthusiasts, our common bond is the flanged wheel on the steel rail. The Society's objectives are to promote cooperation, fellowship and understanding to persons who are interested in Model Railroading, obtain facilities for meetings, discussions, exchange of information, construction and operation of model railroads.

We celebrate the anniversary of our incorporation with a Charter Night dinner each April, enjoy the fellowship of other hobbyists at our Model Railroader Night and hold an Open House on scheduled dates each December through February. Visits to individual and club layouts are slated throughout the year. Day trips to Tourist railroads, Trolley operations and Rail museums are arranged as opportunities arise.

Our miniature world of railroads include trolley cars, turn-of-the-century logging railroads, freight yards, roundhouse operations, passenger stations, farms, villages, coal mines, tourist railroads, small town hi-jinks and more. Several trains are operated simultaneously. They rumble across bridges, disappear into tunnels and glide around sweeping curves enroute to their destinations. Trains are controlled by their "Engineers" while the overall operation is under the watchful eye of the "Trainmaster". Switch engines busily sort cars from incoming freight manifests and ready other trains for departures. Other crews work the diesel engine terminal and the steam engine roundhouse with it's accompanying turntable. Lean down to track level, gaze down the right of way and enjoy the fun and satisfaction of Model Railroading.



Annual Dues for Friend of the Society (non-voting) are $15.00 per year with no visitation or age requirements. (Adobe Reader required for application)

Associate Membership (non-voting) applicants must be a minimum of 14 years old and require personal visits to the Club before applying. The annual dues are $25.00 per year.

Senior Membership applicants must be a minimum of 18 years old and first serve as Associates for a probationary period and requires personal visits to the Club.

Senior Membership annual dues are $60.00 per year. There is a one-time initiation fee of $50.00 assessed upon approval for membership.

Only Senior members have voting privileges or can hold office.

Friends and Associates are invited to bring their equipment on operating night, but must operate initially under the supervision of a Senior member as time and circumstances permit.

We invite persons who are interested in building, maintaining and operating model railroads to visit us and check out our layouts and facilities. For membership information, click here.



The first floor display has been completely rebuilt to cover over 600 square feet since teardown of the prior layout in 2009. The benfits of the rebuild include the utilization of the latest digital model railroad control systems to add more flexibility in train operations.

The second floor HO scale 800 square foot layout is designed for multi-train operations.

Full utilization of both layouts require several operators. During our operating sessions, we simulate day-to-day operations of prototype railroads. At our annual Open House sessions, held December through February, visitors enjoy the "action" wherein we keep the maximum number of trains running. There are also operating trackside accessories which enhance the train operations.



From Interstate 78: Take Route 33 North to US Route 22 West (Approx. 5 miles) Follow Directions for US Route 22 West below...

From US Route 22 West: Take US Route 22 to next Exit, Route 191. South on Route 191 for 2.5 miles. Make right onto Macada Road. BDSME is 0.33 mile on left (after St. Thomas Church)

From US Route 22 East: Take Route 512 (Center Street), turn left at 2nd traffic light onto Macada Road. BDSME is 0.66 mile on right (just before St. Thomas Church)



We look forward to seeing you . . . soon! All Aboard!


YEAR 2015: Lehigh Valley Live Article (HTML)

YEAR 2014: Allentown Morning Call Article (PDF)

Flickr BDSME Photos

(Thank to Becky Fenner for the Flickr page)

BDSME Timetable Info