Selander

Eurobricks Knights
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About Selander

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    Swedish Train Engines Extraordinaire

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    Bracketslope, Newtiles
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    Trains and Trucks, City and Buildings.

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    Sweden
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  1. When starting to implement ball bearing into lego trains, I thought it would be a simple and straight-forward process. However, I soon came across various issues, so after some further work I now have an updated approach as can be studied in pictures and text below. h The content in this text is based on personal experiences and observations. Depending on the exact bill of materials, available tools and engineering skills, you may come to other conclusions. Still I hope some of my observations can be of help/guidance for you. Ball bearings – Why? -A fun technical challenge from an engineering point-of-view. -Benefit of lower rolling resistance (good for ever wider and heavier rolling stock). -Diversified bogie design and detailing, -TLG metal axle based train wheel sets are no longer in production. Technical challenges: -To incorporate precision manufactured BB:s and axles, with less precise lego bricks (tolerance-wise). -To find out an assembly method which can be repeated, with an even and satisfactory end result. How to: Let me run you through my prefered process, step-by-step, including some pictures (see above). -Start by building a bogie frame. For tolerance and alignment reasons, I use two technic liftarm thick, which are sandwiched between elements 30414, 11211 and/or 87087 depending on bogie version. Also sandwich these bricks between 2-n plates to get a solid unit. No bricks on axle positions. Note that I only use bricks with hollow studs inserted into liftarms (for mechnical stress reasons). -Firmly hold the drill with a pair of pliers (polygrip) and manually crank (rotate) the bogie around it, so you slowly let the drill go through both liftarms in the same operation. By doing this manually you remove a minimum of material, leaving a slim-fit for the BB. Drilling through both ensures a good alignment. -Insert metal axle through both BB:s.My ”China-axles” are ever so slightly deformed in each end from the cutting process, so I use a hammer and gently tap the axle end to get it through.Note that other manufacturers (Bricktracks?) seem to have smoother axle ends allowing insertion into BB:s without any tools, -Check that BB:s can slide sideways very easily on the steel axle. If needed, gently polish the axle surface with steel wool. It does not matter if the very end of steel axle is not perfect since that is inserted into the plastic train wheel. -Remove 2-n support plates, and assemble correct plates on top of 30414/11211/87087. -BB:s and axles shall be possible to be introduced into liftarms by hand. A small screwdriver may be of help to push each BB into the middle of each liftarm. Control again that axles slides freely sideways. (if not, try to polish further with metal wool). -Put on plastic train wheels. Bricktracks wheels sit firmly on the steel axle without any need for glueing. -Finish all detailing acc to your preferences. -If successful, bogie should roll with a minimum of friction. Notes to the above: -I use technic liftarms, but I dare assume long technic bricks also would be fine. Just remember the later will give a ½ stud offset. It is better to use one long element, than individual bricks for each BB, because of tolerances and risk for misalignment. -Be careful not to scratch or damage the axle surface. My conclusion is that a freely sliding axle is the best indicator of a good final result. -Since my holes are enlarged to 5,0mm, I do not use M2-washers (which are 5,0mm O,D) since I've seen washers sliding into the brick causing friction. -I have tried numerous ways of introducing BB:s into bricks without drilling. But regardless of assembly method, I have experienced problems with misalignment and occasionly stress cracks in bricks. It worked sometimes, but I never managed to get a safe and repeatable process. Hence my recommendation for drilling first.... Summary of key findings: -Use few and long elements, sandwiched to a solid assembly. -Drill a common through-hole. -Ensure axle slides freely in BB:s. Bill of Materials used: -China produced BB:s type MR52ZZ. -China produced cut steel axles, 2,0 x 40mm. -Technic liftarms thick, #32524 or 40490. -Bricktracks plastic train wheels. Tools used: -Hammer (depending on axle end …). -Pair of pliers (polygrip). -Drill 5,0mm, aimed for cutting metal. -Steel wool. (polishing of axles, if needed)
  2. Nice review and really good looking products 👍👍👍👍👍
  3. Selander

    7w Roof on 6w Body

    Good ! Since you build digitally you could try plate with rail in blue color, and eliminate the layer of blue plates which is now on top of roof supports. It might give the roof a more elegant look.
  4. Selander

    7w Roof on 6w Body

    You can build a normal 6-wide roof + use plate with rail, that gives a nice 1/2 stud overhang on each side. Also I would reduce the number of blue roof supports....they are too dominating right now...
  5. Selander

    Making good use of 1x3x3 windows: historic liveries?

    Ok...older Swedish coaches are typically brown. More Reddish brown though... But you could build them in the dark brown nuance, and use 51239 window frames....
  6. Selander

    Making good use of 1x3x3 windows: historic liveries?

    I also like the new 51239 windows, especially in tan, beeing such usable color. To get proportions right I assembled them sideways. And added a thin light Grey stripe to make the look more train:ish. Like this:
  7. Selander

    MOC 7 width

    Here's an example: You then attach a "normal" 4/6 stud train bogie that fits the tracks.
  8. Selander

    LEGO Trains 2021

    Here's my take on using new window frames 3*3 #51239. They are assembled sideways to get right proportions, and I put a thin light gray stripe (from adhesive foil) onto the TrClear window. This way I can get nice looking tan "train" windows without breaking the bank or use clone brands.
  9. Selander

    Train moc speed problem

    Normally there is room within the bogie itself to put a horisontal 20T gear which in turn drives the vertical 12T which are on the wheel axles. That way you get a slight boost in speed. A bit like this, although this shows a fixed motor, not a bogie. But I think you get my point...
  10. Selander

    Digital Custom Rods

    I too suspected the same person has created two accounts.....
  11. Selander

    Looking for constructive criticisms please

    Loco is an improvement, but that passenger wagon looks "off proportions".... Too high and narrow, and short.... Advice you to study pictures and proportions of the real thing, and adjust your design accordingly.
  12. No pre-orders via Ha-bricks?
  13. Selander

    Looking for constructive criticisms please

    Agree with others that your boilers are generally too large on diameter. Wes_turngrate has a good chart with a range of boiler designs. Also, I would skip Lego train doors, I think they are too large. Windows should face forward, rather than sideways. And as another general advice, try to add more piping and detailing to boilers, they tend to look "un-interesting" for the moment. By carefully studying other people's designs, you will find loads of good ideas and details.
  14. Impressive stuff Far far above my understanding/capabilities....but still really interesting to see ?