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GG Quad

Model of a GG Quad. Features full suspension, return-to-center steering system and a powerful propulsion system. ย 

Datasheet:

Completion date: 15/05/2011
Power: electric (Power Functions)
Dimensions: length 34 studs / width 22 studs / height 20 studs
Weight: 0.895 kg
Suspension: front: independent / rear: dragged axle
Propulsion: 2 x RC motor, direct drive
Top speed: 9.6 kmph
Motors: 2 x RC, 1 x PF Medium

My first model which turned out so fast that I was unable to film it inside my apartment. Original GG Quad is a quad/sport car hybrid, a vehicle that’s useless off-road but extremely fast on road. It’s faster that most of the cars or bikes, because it weights less than a car and it’s more stable than a bike, without the need to slow down around corners. There is also a newer, more powerful version called GG Quadster, but it appeared ugly to me.

Technically, the model is pretty much a copy of my Scania racing truck, with a few changes. These include a return-to-center steering system (created by simply using this piece), a direct drive, that is no gearing used on the rear axle, and a fully studless, lighter body frame. Just like the Scania, it has an independent front suspension and a dragged rear axle, with two coupled RC motors used to connect the rear axle to the chassis. The motors are powered from separate batteries and through separate IR receivers due to their extremely high power consumption, so the model has in fact two independent power supplies and control systems, with motors being only coupled physically by the rear axle.

Aesthetically, I was trying to make the model as light as possible without compromising its look too much. It was clear from the beginning that a model with roughly one third of the chassis occupied by batteries alone can’t be made very authentic, but I’ve been trying to find an acceptable compromise. The weight of the bodywork is around 150 grams, so it constitutes a small part of the model’s total weight. It was also necessary to make model as robust as possible, given its speed and the fact that I was forced to drive it outdoors.

The model certainly has two disadvantages: the front wheels tend to fall off, and the handlebars are fixed. The problem with the front wheels is that I used simple axle pins to hold them in place, and it worked well until the axle pins started to wear out. They were brand new at the beginning, and they looked really shabby in the end. The problem with the handlebars is that making it turn with the front wheels would result in increased weight and complexity, with the latter making the model less robust.

The model was fun to play with, and the fact that it wasn’t much faster than my Scania despite being 50% lighter shows that I haven’t used the full potential of the RC motors. I suppose that the next step is to use a gearbox that would allow to switch between RC motor’s slower and faster output remotely. Experimenting with various wheel sizes could also give some interesting results.

Photos:

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Video:

Categories: Bikes Tags:
  1. Sariel
    March 4th, 2016 at 13:51 | #1

    @pawel
    Tires and rims come from the 8448 set.

  2. pawel
    March 4th, 2016 at 12:49 | #2

    Awesome work!
    one Q: tires and rims….some customs or i missed a set having those?
    …and the idea of shoots with beans ๐Ÿ™‚

  3. Sariel
    April 7th, 2013 at 01:06 | #3

    @AZK11
    Because it’s narrower.

  4. AZK11
    April 6th, 2013 at 19:52 | #4

    for the front axle, why did you use axle pins instead of the steering arm with 4 ball joints?

  5. Sariel
    April 5th, 2013 at 10:06 | #5

    @Kevin
    8448.

  6. Kevin
    April 5th, 2013 at 04:38 | #6

    Which set did the wheels come in ?

  7. Sariel
    December 5th, 2011 at 07:40 | #7

    @qwertyuiop
    No, it’s when axle is dragged.

  8. qwertyuiop
    December 5th, 2011 at 05:55 | #8

    what exactly is a dragged axle? is it when the axle moves only up and down?

  9. Sariel
    October 9th, 2011 at 17:01 | #9

    @michael304
    I used PF extension wire. Not exactly a new piece.

  10. michael304
    October 9th, 2011 at 15:56 | #10

    wich wire did you use for connecting the RC motors to the rechargeable battery boxes?
    can you connect the RC motors to an normal battery box too?

  11. Ed
    August 5th, 2011 at 00:13 | #11

    @Sariel ok thanks

  12. Sariel
    July 18th, 2011 at 19:39 | #12

    @Ed
    That’s explained in the description.

  13. Ed
    July 18th, 2011 at 19:32 | #13

    why are their 2 ir recivers

  14. June 11th, 2011 at 21:51 | #14

    Very nice work! I love your creations. It’s impressive which speed those motors are capable of. Hope you tend to build more “speed” vehicles, love those!

  15. The sid
    June 1st, 2011 at 16:19 | #15

    @Sariel
    Thanks dude. Sorry, I accidentally skipped that paragraph, my bad.

  16. Sariel
    May 31st, 2011 at 15:15 | #16

    @The sid
    You know what’s funny, Sid? The answer is sitting right in front of you, just a couple of paragraphs above, in the description. I even provided a link to the Bricklink catalog for that piece. Just read it, it’s not even really long.

  17. The sid
    May 31st, 2011 at 14:26 | #17

    @Sariel
    Ok, thanks buddy. But about that yellow part, was it included in a set or did you buy it from bricklink?
    Could you please tell me what’s the name of that yellow piece?

  18. Sariel
    May 31st, 2011 at 14:16 | #18

    @The sid
    I didn’t assembly it, the yellow part is a single Lego piece and it makes the whole mechanism work.

  19. The sid
    May 31st, 2011 at 14:02 | #19

    Great work buddy! I read in the previous comments that you’ve already taken apart your RC model, but still I’d like to ask: how did you assembly the return to center steering part?

    BTW: I tried to create a return to center steering system, but the first one was too heavy, so I took it apart. I went on vacation and after returning I forgot how I built it. I began on the 2nd version and I failed, hahahaha…

  20. Ninsei
    May 28th, 2011 at 12:59 | #20

    @Neil
    Good catch actually – I literally don’t have time to build anything. My Lego passion became something like collecting instead of building, and it started (or re-started since my childhood) when my son was born – it was quite funny when I was buying 8275 and was saying it’s for me and my son, and when asked how old is he I answered: ‘he is 2 weeks old!’ ๐Ÿ™‚ I don’t own many sets, couple of Technics flagships since 2007 and bunch of separately bought parts that seemed to be interesting. Nothing to be jelous for. I envy bulders like Sariel and others, because of their skills and imagination they use to bulid MOCs. Maybe some day I will became AFOL MOC bulider as well ๐Ÿ™‚

  21. Neil
    May 27th, 2011 at 00:23 | #21

    @Ninsei and how many receivers, remotes, and motors do you have? I just think spending money on batteries might be a waste if you didn’t have anything to use them. ๐Ÿ™‚ but yeah, I’m jealous.

  22. Sariel
    May 24th, 2011 at 23:08 | #22

    @Ninsei
    Whoa, lucky you ๐Ÿ™‚

  23. Ninsei
    May 24th, 2011 at 22:41 | #23

    @Sariel
    I have four 8878 batteries ๐Ÿ™‚ However I need to find good use for them, as I can’t imagine more than two could be ever needed…

  24. Sariel
    May 23rd, 2011 at 10:14 | #24

    @MB
    Again: I have taken it apart already. Besides, I doubt many people have two 8878 batteries.

  25. MB
    May 23rd, 2011 at 09:57 | #25

    Super cool! I also would have been very interested about the instructions!
    Actually, few “inside” images (partially buillded) would have been sufficent.

  26. Sariel
    May 23rd, 2011 at 07:56 | #26

    @jc
    I have taken it apart already. Besides, I doubt many people have two 8878 batteries.

  27. jc
    May 23rd, 2011 at 04:22 | #27

    I know u dont do instructions but can u because this seem small but if not thats ok

  28. Mike
    May 22nd, 2011 at 14:12 | #28

    @Sariel
    you got a point there.
    ๐Ÿ˜€ ๐Ÿ˜€ ๐Ÿ˜€

  29. Sariel
    May 22nd, 2011 at 12:39 | #29

    @Mike
    Well, I couldn’t possibly hurl a wheel at her with something that slow.

  30. Mike
    May 22nd, 2011 at 12:12 | #30

    @Sariel
    hmmm… yes. She leans down to pick it up..
    Ok, but then you need an Oshkosh LVSR. the more wheels the better ๐Ÿ™‚

  31. Sariel
    May 22nd, 2011 at 11:05 | #31

    @Mike
    I disagree. Don’t you think that “have you seen my lost wheel?” is a great pick-up line? ๐Ÿ™‚

  32. Mike
    May 22nd, 2011 at 10:05 | #32

    @Sariel
    well you can’t really go pick up girls with a quad whose wheels fall off… ๐Ÿ˜€

  33. May 22nd, 2011 at 08:28 | #33

    Strange to see that while making a right turn, the right wheel falls off. I would have guessed the right-wheel would come off in-stead. Anyway, nice model, also the blonde, long-legged one on the bench ๐Ÿ˜‰ I think it’s hard to find ‘in-the-wild’ a woman that is single, sitting on a bench, loving a man playing with his Lego… not impossible, but still.

  34. technikfreak
    May 21st, 2011 at 20:28 | #34

    great work

  35. Sariel
    May 21st, 2011 at 14:23 | #35

    @Alessandro
    1. Two cameras, my usual: Sony a33 and Casio Exilim EX-FS10.
    2. Pinnacle Studio 14.
    3. The blonde lady ignored me completely. Sigh.

  36. May 21st, 2011 at 12:39 | #36

    Now – you are getting better and better! What is happening to you? Let me ask you a few questions:

    1. which camera did you use to film this?
    2. wich sw do you use to edit videos?
    3. what about the blonde lady sitting on the bench reading a book .. did she react to you filming around her with this little fast red quad goign around?

    Please do not stop with this. You are doing a great job. -Alessandro

  37. Marq
    May 21st, 2011 at 12:31 | #37

    Bardzo fajny. Przypomina mi mรณj projekt z przed kilku miesiฤ™cy . Wzorowany byล‚ na quadzie Yamacha Grizzly. Moลผe doczekamy siฤ™ kolejnej wersji przeprawowej?

  38. Mike
    May 21st, 2011 at 10:58 | #38

    @Sariel
    Oh yes, I know ๐Ÿ™‚ I was just wondering what it’d be like with these motors, a V8 engine, and the wheels you used for the Charger.

  39. Sariel
    May 21st, 2011 at 08:56 | #39

    @Neil
    Axle pins got worn.

  40. Neil
    May 21st, 2011 at 01:35 | #40

    any reason that wheel fell off all the time?

  41. Sariel
    May 21st, 2011 at 00:57 | #41

    @Mike
    Sure they did. And I’ve built a dragster driven by Medium motors a long time ago. It was fast.

  42. Mike
    May 20th, 2011 at 23:57 | #42

    Did the motors warm at all?

  43. Mike
    May 20th, 2011 at 23:53 | #43

    Great video XD XD XD
    liked the beans part!
    Maybe a dragster could be next to try and use the potential of these motors, a really light dragster. Maybe it could even do a wheelie.
    Nice job ๐Ÿ™‚

  44. Mike
    May 20th, 2011 at 23:44 | #44

    looks like General Grievous but great nevertheless ๐Ÿ™‚

  45. Sariel
    May 20th, 2011 at 23:14 | #45

    @Jade2448
    If you watch the video closely, there’s a notice at the end that says where I buy Lego pieces. And yes, that applies to wheels too.

  46. Jade2448
    May 20th, 2011 at 23:06 | #46

    great idea, but where do you get the wheels that you have used?

  47. May 20th, 2011 at 22:49 | #47

    haha, great ideas the faq section at the end of the video (I receive always the same question). Too bas that the steering bar doesn’t turn and that wheel tend to fall off but it’s really funny, especially the low motion.

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