Phil B

MOC/MOD - 4-6-0 Hall Class "Olton Hall" - aka The Hogwarts Express

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As already shown in a preview in my Hogwarts Express Carriages thread, I have completed my rendition of the "Olton Hall" steam locomotive, famous for pulling the Hogwarts Express in the fictional wizarding world of Harry Potter. Here she is in close-up:

49364785237_9f03ab73ff_b.jpg[

Hogwarts Express by Phil B, on Flickr

This is a model that started as a Mod of 75955, but has progressed far enough from the original set that you can call it a MOC I think. Here is a list of all modifications I made:

  • Lengthened the entire boiler by 6 studs and placed the middle section under a one-plate angle to better capture the shape of the real Hall Class.
  • Widened the engine to 7 studs (almost 10 across the pistons and driverods). This allowed me to accurately model the forward facing windows in the cab, and allowed me to create openings for the wheel flanges to accommodate a larger wheel size,
  • Upgraded the wheels to Big Ben XL Drivers and Big Ben Medium pilot truck wheels - I like how they have true spokes vs the printed spokes on LEGO's regular train wheels. The model works with standard LEGO Large and regular train wheels as well.
  • Extended the pipes from the side to around the nose of the boiler.
  • Redesigned the front buffer beam. Gone is the "lock" from the original model, but it features the same details as the real-life Olton Hall.
  • With the change to 7 wide I widened the cab, but kept the original firebox and gauges from 75955, which was quite an "offset" challenge to do.
  • Completely redesigned the tender to house a LiIon LEGO battery box and a Power Functions IR Receiver, though the model can work with PFxBricks as well.
  • The tender is 6 wide, with one pivoting axle and a fixed PF train motor.

On the pictures she is pulling my consist of 5 BR Mk I coaches - 2 First Class, 2 Second Class and a combined First Class/Baggage/Brake coach. Each carriage has a fully detailed interior and is 7 wide. Progress on these carriages has been documented in my Hogwarts Express Carriages thread.

Here are the picture and drawing I used for inspiration:

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More pictures of the engine:

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The full consist:

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And the coach interiors:

 

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Edited by Phil B

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Overall, great. I'll offer some minor critiques:

  • Did you consider widening the boiler to 5 studs width? It looks a bit narrow at 4 to me.
  • I think it's possible that the stack could be closer to the real-deal. For example:

AnneGz5.png

  • You could also probably use a more severe angle on the roof of the cab.

These are pretty small nits, though - I can't really spot anything else. Great job.

Edited by SteamSewnEmpire

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30 minutes ago, SteamSewnEmpire said:

Overall, great. I'll offer some minor critiques:

  • Did you consider widening the boiler to 5 studs width? It looks a bit narrow at 4 to me.
  • I think it's possible that the stack could be closer to the real-deal. For example:

AnneGz5.png

  • You could also probably use a more severe angle on the roof of the cab.

These are pretty small nits, though - I can't really spot anything else. Great job.

First of all, thanks for the compliments and the suggestions. A couple of quick reactions:

  • I left the boiler 4 wide on purpose. If you look closely at the front drawing I included in my post, you see that the width of the boiler is equal to the space between the buffers, which in 7 wide is 4 wide.
  • I like your suggestion for the smokestack but currently I have no spot available for an axle to fit in. As I am toying with the idea to make the firebox one stud longer, I might experiment with different smokestack designs as well.
  • The roof of the cab indeed needs a more severe angle to be like the original. As I started this as a Mod of 75955, I just kept the overall look of the cab, while making it 1 stud wider. I also wanted to keep the height of the engine the same, which further restricted my ability to change the roof (I actually made the roof 1 plate less tall compared to the original to compensate for the increased wheelsize.

For now I am happy with how she looks like and she runs smoothly (ok, handling S-curves through switches is problematic but I think that is a common problem with the lead truck design - if anyone has any tips on that I’d be happy to hear their experience on how to fix it).

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That is looking really nice, great work! Had you not mentioned it I would not have noticed the cab roof, but now that you have, did you try 1x3x1 curved slopes instead of the 2x4x2/3 curved slopes + one red plate? Also, the stack does seem very tricky, I have no idea how to do it better beyond keeping an eye out for clever tricks.

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For the smokestack, might I suggest a 2x2 round brick in black, a 2x2 round tile with the hole in the middle in red, put a 2L axle into that and then stick a train wheel with axle hole on top?

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2 hours ago, coaster said:

For the smokestack, might I suggest a 2x2 round brick in black, a 2x2 round tile with the hole in the middle in red, put a 2L axle into that and then stick a train wheel with axle hole on top?

That is a great idea! How about this?

49374030797_5d1dc35e8c_b.jpg

 

Here's a real-life picture (I only had one 15535 Tile Round 2x2 with Hole in Black, so I had to use a DBG one). Took the clear O-ring off of the wheel.

49373565598_1656cde1df_b.jpg

Edited by Phil B

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2 hours ago, Phil B said:

That is a great idea! How about this?

49374030797_5d1dc35e8c_b.jpg

 

Here's a real-life picture (I only had one 15535 Tile Round 2x2 with Hole in Black, so I had to use a DBG one). Took the clear O-ring off of the wheel.

49373565598_1656cde1df_b.jpg

Exactly what I was thinking!

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41 minutes ago, coaster said:

Exactly what I was thinking!

Only issue is that the funnel is a bit too chunky when compared with the real Olton Hall. I'm still trying to find a better solution - your suggestions got me thinking ... if only lego made a black cylindrical brick that is 1.5 studs wide (and not bulbous like a minifig head). Any suggestions, anyone?

PS: @coaster: Received my OcTRAINber prize from your company yesterday. Awesome product! You'll see it featured in some WIP pictures here shortly on the next thing I'm building (which will be massive and also HP themed). Stay tuned!

Edited by Phil B

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Question, how many engines are you running to pull all those coaches?  I have a modified similar set, pulling 4 coaches...they are the smaller size that came with the set.  Running a single PF motor under my tender.  This motor will pull the load, but struggles with any fancy curves.  I'm still using the connectors that come with the set...see you upgraded to the standard train couplers.  This might help a bit too.

As for your build, looks great.  My moc was off the latest version and had the tan access on the coaches.  I swapped this out to yellow as you have done.  Your tender looks great with the 6 wheels and larger size.  I ended up putting my battery in the first coach.  I pulled all the Hogswort Express off, wanted a more general engine and passenger coaches.  Can post some pictures if you are interested.

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Single PF train motor in the tender. It was slipping at first, but then I added bicycle inner tire rings onto the wheels and now it runs great. Pulls all 5 coaches easily.

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