bogieman

Nice model, that locomotive left the property before I worked at ASF-Granite City for a couple of years. They had a GE centercab when I was there. The second picture in @kozoz's post shows an "F" to define what is the front. Most every locomotive in the US carries a similar designation so it's not ambiguous what end is which when reporting defects, for example.

We think alike. I've never been afraid to cut a part or print a part to get the look I desire. This 3D printed windshield for the EMD E & F units is one of my creations: https://bricktraindepot.com/shop/accessories/resin-printed-f7-windshield/ I'm printing some arch bar truck sideframes as I write this. Dave

Well done, very clever! Those circuit cube motors are amazingly powerful. Dave

Great rendition. I was in London in November and road that line several times. Amazed at how long those have been in service.

Very cool, when I first saw the picture, I thought it was an amusement park bumper car.

Just an update to my post above from 2021. I then reported that I tried the Kadee couplers from Brick Model Railroader and had trouble with them disconnecting on the transitions between flat and grades on my home layout, so I went back to magnets. I had a lot of trouble, though, with the magnets not being strong enough, even the Studly Trains neodymium magnets with supplemental disc magnets such that it limited my train length. About a year ago I finally redid the profile of the grades on my layout to get rid of the worst transitions. I've now sold off all my magnets on ebay and have fully converted to the Kadee's with no issues on the layout or the train length. I've installed magnets below the track in 3D printed track sections that activate the uncoupling capability of the Kadee's at my yard and sidings. Dave

Nice work. The fixed single axle rear truck would have to be built to rotate somehow coupled to the front truck to make it capable of Lego tracks. Always loved the Aerotrain which came out when I was about 6 YO. Started my love of trains and my career at EMD. I've seen both preserved trains, one in Green Bay under roof in great condition, the other in St. Louis, parked outdoors and deteriorating. I hope they someday put it under roof; Google maps shows it's still outside. Dave

That is truly outstanding, what scale is it? I especially like the detail on the trucks as I designed those on the prototype. Dave

The L-motor is geared 1:1 with the drivers so benefits from their larger diameter. In my experience, it's not necessary to worry about closely matching the speeds, the motor characteristics take care of it. It's not much different that IRL putting an SW1500 into a train of SD70's. They all contribute to the total tractive effort according to their abilities. I connect my motors in parallel to the Tsunami2 DDC controller so they all see the same voltage. As long as they aren't experiencing wheelslip, they will find an operating point on the torque-speed curve where they're happy. I'm not sure if it would be any different using a PF infrared receiver for power as that puts out a PWM voltage. This terrific resource shows how all the Lego motors produce more torque as they are slowed down when operating at a constant voltage: https://www.philohome.com/motors/motorcomp.htm This is similar to the series-wound DC motor characteristic of real locos.

Looks great running! I can't tell from the second video if the trailing set of drivers rotate relative to the boiler. If they do, where did you locate the pivot? Dave

Really looks great! Nicely done. Do you print your own valve gear and rods? Dave

Outstanding, been following your progress on Flickr. Particularly love the timber bridge.

Looks like a great show layout. Will you have it at Brickworld Chicago this year?

Great work! Love all the gears.

Well done! Love all the colors, especially the dark blue and dark green. Dave