Well, today's post has been a long time coming. I started the design work way back in February, and it's been a lot of revision and waiting for parts and money since then. I wanted to post this back in May I think, and I'm sure glad I waited.
I saw this engine first on a trip up to Flagstaff, AZ at the Pioneer Museum and I fell in love. I will post only a few pictures of it here, I went sort of on a photo spree today trying to make sure I captured adequate photos of all the detailing. The only non-lego parts are the BBB Medium drivers, and the only modified parts are the 2.5 stud flex cables for the drive rods. The rest of the engine is all LEGO.
A picture of the prototype (Courtesy of AirandSpace.com, found by google search!):
It can negotiate all the curves I've put it through with only a bit of slowdown. The best picture of it turning is here: http://www.brickshel...ve/img_0898.jpg, but it is too large to post on EB.
It was tricky with the tender to get all the right shapes and gaps, and although it's a tad too tall I am very pleased with how it turned out.
I run the tender hard-linked with the engine, and the clearance is perfect. The cab floor extends just over the front platform of the tender without ever swinging into it!
I have to give a lot of thanks to Toastie for the help and advice on creating the custom-length flex rods, I can't explain how difficult it was to try and trim those things just right!
You can check out the whole gallery. when moderated, here: http://www.brickshel...ry.cgi?f=517797
Getting this engine to run reliably has been a real challenge, in large part thanks to the number of wheels and the fact that the center driver of each set is offset a stud. This made the Flex System my only workable option (Before Zephyr's rods, which are on their way! ). The tender is a little bit too large, but it was an exaggeration well worth it to me since I can fit a battery box and IR receiver in it; and I can change out the bogies on the tender and the trailing truck on the engine itself and motorise it. It doesnt look as nice, so I prefer unpowered. It's been a real love-hate relationship with it as I've worked the last several months, but I finally have found myself happy enough to share with you. :)
I don't really know what more to say about it, if anyone has questions or wants more detail photos please feel free to ask! Oh, and please do check out that gallery when moderated! There are many more photos there to see, including larger versions of this topic's top photo and a few others. I sincerely hope you enjoy looking at my engine!
Edited by Daedalus304, 05 December 2012 - 08:31 AM.