Home > Misc. > Hagglunds BV 206

Hagglunds BV 206

December 18th, 2010 Leave a comment Go to comments

Small, simple model built for playing in the snow. Features simple suspension, remote-controlled drive & steering, and lights.  


Completion date: 17/12/2010
Power: electric (Power Functions)
Dimensions: length 40 studs / width 12 studs / height 16 studs
Weight: 0.787 kg
Suspension: pendular bogies
Propulsion: 2 x PF Medium motor geared 2:1
Top speed: 0.8 kmph
Motors: 2 x PF Medium, 1 x 71427

This is a very simple articulated tracked vehicle, loosely modelled after the Swedish Hagglunds BV 206. My inspiration came obviously from Peer “mahjqa” Kreuger and his Stilzkin Igniz offroad vehicle. Since Peer’s model was really hard to top technically or aesthetically, I decided to go for simplicity and small size, a size fit for Lego full-rubber tracks I never had a chance to use before.

The vehicle is composed of two parts kept together by a complex articulated joint. The joint has the ability to change the horizontal angle between the two parts, which is controlled by a 71427 motor geared down substantially. It also has ability to rotate around transverse and longitudinal axis, freely, with the only constraint being the space between two parts of the vehicle. Initially, I wanted to control its rotating around transverse axis with another motor, thus gaining the ability to elevate or lower both ends of the vehicle, but it proved to perform very well without it.

Both parts have identical chassis, with two separate drive motors – PF Medium motors geared down 2:1. I was going to use a single drive motor located in one part of the vehicle and transfer the drive to another by universal joints, but that would require making the central joint much more complex or restrict its movement, so I used two separate motors instead. This solution, coupled with small weight of the model and the excellent traction of the full-rubber tracks, results in outstanding climbing abilities, shown on the video below.

The bodies of the both parts of the vehicle, despite being similar in size, have entirely different internals. The first part houses a 71427 motor with its gearing, and a lot of wires due to three parts of Lego LEDs used. The second part is literally built around the rechargeable battery and a single IR receiver, with the addition of a single pair of Lego LEDs. There are three wires connecting both parts.

The model was very fun to play with, and performed quite well in the snow, even though the steering system was struggling hard to work  with tracks buried in snow. Also, despite its good ground clearance, the model would pile up some snow in front of it while driving, until the point at which the pile was large enough to stop it. Still, its performance against obstacles was extraordinary, and its climbing abilities astonishing given its size. Two disadvantages degrading its performance was the tall silhouette, resulting in the centre of gravity located so high that the vehicle had a strong tendency to tip over, and the small weight which made it difficult to control, as it would change its direction on obstacles sometimes.


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Categories: Misc. Tags: , ,
  1. Ev3fan
    April 17th, 2014 at 10:14 | #1

    I’m so amazed how you’d fit all these components in a Chassis this small (it seems to Be just six studs wide!).

  2. Sariel
    August 11th, 2012 at 10:55 | #2

    Sorry, but I don’t even have it anymore. It was dismantled long ago.

  3. August 11th, 2012 at 10:10 | #3

    Hello I do not know if my question is directed correctly, but I would ask whether it is possible to buy from you or through you this model. I would like it to please my son, who will have 5 birthday and is literally crazy about the snow vehicles.

  4. silver
    January 16th, 2012 at 18:13 | #4

    @Sariel thanks a lot!!

  5. Sariel
    January 16th, 2012 at 17:49 | #5

    You can see on the photos.

  6. silver
    January 16th, 2012 at 17:39 | #6

    Suspension on rubber tracks hows that done? Im searching over the web for a week now for that kind of suspension!!!

  7. January 18th, 2011 at 17:11 | #7

    Thank you

  8. Sariel
    January 17th, 2011 at 18:32 | #8

    I’m not sure, but it will be also available in a PDF file for download (not for free, of course), so if you can’t get it in store, you can get it in the Internet.

  9. January 17th, 2011 at 16:57 | #9

    I have one question to your Book: will it Sold in German stores?

  10. Sariel
    December 31st, 2010 at 08:06 | #10

    Thank you. Your Stilzkin was a great inspiration and I admire your work.

  11. December 31st, 2010 at 07:13 | #11

    It’s a great little vehicle. I was amazed the rubber tracks hold up so well, whenever I try to use them they’ve got tons of friction. I also like to cram as much functionality in a tiny package whenever possible, so I think this is a great effort.

    (and thanks for linking me.)

  12. Sariel
    December 30th, 2010 at 17:15 | #12

    I had no time, as I was ill and I’m only getting well now.

  13. December 30th, 2010 at 16:10 | #13

    i wonder why you didn`t publish your dodge charger on your website yet

  14. Antti
    December 30th, 2010 at 09:14 | #14

    Fair enough. I hope you will be positively suprised how it sells.

  15. Sariel
    December 28th, 2010 at 23:19 | #15

    Nope, I don’t want to turn my hobby into a job. On another note, I will probably publish a book in 2011 that will show how to build functional models with Lego pieces.

  16. December 28th, 2010 at 23:09 | #16

    Iäm impressed by your talent. I keep thinking how much this hoppy costs you. Would you be intrested to make instructions for people if they would pay for it? For example 20 to 40 key pictures and a part list. I understand if this is something you don’t want to do. It’s more like art and in the end I just enjoy your work.

  17. Sariel
    December 26th, 2010 at 19:55 | #17

    Of course mahjqa’s is better, in many ways.

  18. December 25th, 2010 at 12:03 | #18

    Sorry for my bad english, but i am a German child.

  19. December 25th, 2010 at 12:00 | #19

    Good, but mahjqa’s is better , because it is biger.

  20. Sariel
    December 24th, 2010 at 10:12 | #20

    I visited ldraw.org and searched through their parts tracker. I suggest you do the same.

  21. December 24th, 2010 at 04:59 | #21

    Hi, I have notice that in your MLCad renderings you have parts that i cannot find in my MLCad parts list. Did you make your own? If possible can I download the same parts as you? Thank you.

  22. December 22nd, 2010 at 07:38 | #22

    lol! This thing is great. I can say you have done a great job, especially with how small it is. I have towed 6 of these on a big flatbed tow truck. these are fun to drive.

  23. gihan
    December 20th, 2010 at 18:48 | #23

    I drove the BV206 for 1 year in my military training, a great tracked vehicle! I would say that your model behaves like the real thing, it can overcome most obstacles and drive in all kinds of terrain.

  24. Sariel
    December 20th, 2010 at 14:27 | #24

    I know. I wanted to make is as small as I could.

  25. iPilot
    December 20th, 2010 at 14:20 | #25

    A little whining – BV206 has the cabin as wide as the tracks. But that’s what it is – “loosely based”. Nevertheless You should call it “Almost Hägglunds Bandvagn 206”

  26. Marq
    December 19th, 2010 at 22:39 | #26

    A jednak spełniłeś moją prośbę o test zimowy. Co do projektu całkiem szybka “ciuchcia” a drugi wagonik nie tylko fajnie wygląda ale i pomaga w jeździe. 5/5

  27. Sariel
    December 18th, 2010 at 21:54 | #27

    @Kathryn Brown
    What building instructions?

  28. Mike
    December 18th, 2010 at 20:58 | #28

    looks like a locomotive from the front. It’s fun! 🙂

  29. Mike
    December 18th, 2010 at 20:49 | #29

    🙂 so that’s why the Dodge isn’t ready yet! 😀 nice, I like it!

  30. ppiimm123
    December 18th, 2010 at 19:50 | #30

    I think you don’t like the Dodge Charger
    But its ok this is fun to!

  31. Kathryn Brown
    December 18th, 2010 at 19:32 | #31

    This is so cute,are building instructions coming soon.

  32. Sariel
    December 18th, 2010 at 16:05 | #32

    @David Luders
    It’s a hamster, not a gerbil, and sadly there’s no space left for him to sit in.

  33. December 18th, 2010 at 15:31 | #33

    Nie no Sariel za tobą niemożna nadążyć . Ostatnio Octopod a teraz Hagglunds BV 206. Co tu dużo mówić. Po prostu rewelacja .


  34. David Luders
    December 18th, 2010 at 14:56 | #34

    Maybe you have secretly trained your gerbil “Lucius” to drive this! 🙂 Your MOC has nice climbing ability.

  35. Sariel
    December 18th, 2010 at 13:41 | #35

    @NxT bUiLdEr

  36. NxT bUiLdEr
    December 18th, 2010 at 13:34 | #36

    but it’s light weight would keep it from sinking in powdery snow wouldn’t it?

  37. Sariel
    December 18th, 2010 at 11:38 | #37

    Yes, it does.

  38. fin
    December 18th, 2010 at 11:10 | #38

    does it use the rechageable battery box

  39. Sariel
    December 18th, 2010 at 09:42 | #39

    I’m not sure, with its light weight it could get stuck easily trying to plow anything.

  40. lewis
    December 18th, 2010 at 09:39 | #40

    plough on the front?

  41. lewis
    December 18th, 2010 at 09:36 | #41

    almost cute, good idea with all the snow. i’m thinking about testing my tt chassis in the white stuff?

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