piterx

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Posts posted by piterx

  1. Posted

    20 hours ago, amorti said:

    @piterx I reckon the CaDA motor can make the bevel box skip even if a Lego motor cant. Anyway, I can't help myself :pir-laugh:

    I picked up this cross-bracing habit from Didumos (a pinhole not used is one wasted) and until the tyres arrive, all I can do is tinker at it.

    What do you think about the futuristic wheels? I like the idea of putting the bevel on the inside but I'm not sold on the rubber-band tyres.

    the futuristic wheels work really good to be honest! the only reason why i preferred the new ones over those is that they are slightly bigger so the bike goes a little faster

  2. Posted · Edited by piterx

    hey guys! so: 
    - the 81.6 dont fit and you will have to widen the chassis one more stud (but i might do it for you one of these days)
    - it works with standard PF lithium battery and the steering doesnt get too compromised. The only problem would be the range and the speed that will make it go like the driver was drunk :D
    try building this one if you don't have the new wheels, it was the original model i made a while a go but i wasn't too happy with it, it was working really good but it was still bulky here and there, like the gear rack part, that sucks big time, the new one is so much cleaner :)

    @amorti that is cool dude! even tho i believe you dont really need to reinforce it that much, i never had the gear skipping, nor there nor on the gear rack:)

    motolego-10.jpg
    instructions.jpg

  3. Posted

    15 minutes ago, keymaker said:

    I am not into motorbikes but man, great work with this balance/steering mechanism. Simple and effective and those new tires are really great for such constructions.

    thank you dude! yeah those tires are awesome

     

    13 minutes ago, amorti said:

    Looks good! Slower, easier than the fast bike.

    Will have a go later on. I don't have the tyres but I probably have the rest.

    Have a look at these motors, they're almost twice as fast as Lego motors and have more torque too. Should be great for this?

    https://www.custombricks.de/motors-cables-sbrick/cada-power-functions-l-motor.html

     

     

     

     

     

    yeah dude definitely try it out! it's really simple to control, you can use the old futuristic wheels as well they fit :)
    i've never seen that motor! that's cool actually!

  4. Posted · Edited by piterx

    Hello everyone!
    I was wondering if it was possible making a bike that was fun to drive around while keeping it low price so i came up with this:
    it's a baja bike, it runs on an L motor geared up 2:1 and like the other bikes i've been making it shares the same principle to keep it upright.
    These new tires are awesome, they have an amazing grip and the rounded shape makes em really good for motorbikes!

    I hope you'll like it, here are some pics and the video i shot :)

    bajabike-5-P-Lego.jpg
    bajabike-1-P-Lego.jpg
    bajabike-2-P-Lego.jpg
    bajabike-3-P-Lego.jpg
    bajabike-4-P-Lego.jpg

  6. Posted · Edited by piterx

    1 hour ago, amorti said:

    In a real bike there might be a few causes. As far as I know, the most common would be: lack of damping (and/or too low spring rate) in the rear shock, too much power lifting the front so it skims the tarmac, real wheel not in line with front wheel.

    There's two of those you can't really fix with Lego since Lego shocks don't have damping and this bike obviously has way too much power.

    Putting a stronger spring is easy enough. I'm using the one from 42036 (hard) and in a static test it feels balanced to the front, what do you have fitted?

    But, you can definitely do a few things to stiffen the frame and reduce slack across the whole model.

    I worked on it some more today. Got the geometry as you have it, relaxed the colour choices, used long panels in the belly pan, and stiffened up the frame which allowed mounting the fuel tank lower.

    I also note the buggy motor is attached across an axle; I think it'll be better mounted on non friction pins. Maybe pins with friction would act as damping, maybe they'd just make it too tight, will test it once the motor arrives.

    Here's some pics.

     

     

    More pics in the bricksafe album.

    Decided to order 8422. I'll get an hour of nostalgia building it, then use the tyres for this :)

    I do really like your color scheme and the long panel too! Too bad that those big wheels won't fit in the RC motor unless you offset it on the side, so yeah great choice getting the old ones, they grip way better too!
    adding the pins to dampen the spring is a good idea, the only reason why i didn't use them is that i didn't like them sticking out :P 

    It's awesome anyway, we definitely need more bikes in our builders community :D

     

  8. Posted

    I did indeed :P this will be the bike in my next video one of these days
    It's more manouverable than the other due to its lower center of gravity, those tires definitely grip better and are more stable, so if you find em for cheap definitely get them!

    The headshakes are something i havent managed to figure out yet, i belive the shock absorber on the back being too soft could be the cause


    Bike-2-P-Lego.jpg
    Bike-2-A-P-Lego.jpg

  9. Posted · Edited by piterx

    On 3/19/2021 at 4:05 PM, amorti said:

    Looks brilliant, I'd like to make it.

    Could you make instructions? Or give us some more pictures so we can figure it out?

    First of all, thanks to all you guys for your nice words :)
    I made a couple of renders to help you out i hope they will be enough! if not i can render some more!

    https://ibb.co/Yc98gcY
    https://ibb.co/PYjHM8S

    Bike-1-P-Lego.jpg
    Bike-1-A-P-Lego.jpg

    1 hour ago, amorti said:

    I've had a go at building it. 

    The colours are interesting, as it's built from mostly scraps of the Corvette and 42036. It's so bright underneath, it could almost be an official set :pir_tong2:

    Couple of questions.

    As you see I don't have a buggy motor yet, but I've brick built a placeholder and ordered a replica. Are these tyres going to fit or are they too big and I need to get the smaller old school motorcycle wheels? Funny as I had 8422 many many years ago and that would seem the ideal set.

    I couldn't figure out how the original headstock area was done from the available pictures, so I just did it on the basis of whatever lined up. It is surprisingly sturdy (form locking the forks helps) but has more rake angle than I'd really like. It has a decent tendency to run straight at "pushing it across the kitchen" speeds so I reckon it will work fine, but maybe it'll steer lazy at high speed. There again back-to-front yokes (all Lego bikes and RC bikes in general seem to have this) seem to suggest more trail is better?

    More pictures in my bricksafe album if anyone has any suggestions.

    Those tires are too big to fit on that unless you extend it a little bit more adding a 1:2 reduction maybe as well.
    I've done dozens of tests and the oldschool ones perform way better for grip and they seem to be the perfect radius to couple with the RC motor to get the maximum performances out of it. The only downside is that you'll get trigger happy with the ludicrous mode and eat through them quite quickly :D I strongly reccomend using it on smooth surfaces!

    I've got other 4 different bikes to show you guys all the tests i've done, they all work and they are all different :) soon i will post more!
     

  10. Posted

    Hi there :) 
    Apparently there was a bike contest i totally missed!
    I've kept myself really busy building bikes lately, this is the fastest one i've built so far, probably the fastest ever built i guess?
    It's really simple, RC motor, buwizz used as a weight and that's pretty much it :) 
    It's also really really easy to control

    I got also another one that shares a lot of features with this one that I will publish as soon as the lockdown ends and i can go shoot a video of it. I hope you'll like it!

     

  23. Posted

    5 hours ago, WvG_853 said:

    Thanks for the explanation! I have to build one to check out how this works in practice.

    :) you're welcome! try building the small one it handles really well and it doesn't need a big space.

    i went out for another test and it looks like in ludicrous the bike needs stiffer suspensions, i believe i'll need to swap them with the yellow ones. Other than that it behaves really well!

     

  25. Posted · Edited by piterx

    On 2/15/2020 at 12:20 AM, WvG_853 said:

    Amazing and very original! First time I see a Lego RC bike. How do the motorbikes stay upright?

    Think about the wheels of a shopping kart, they have the pivot point in front of them so when you push the kart they're (almost) always rotating in the direction you want.

    The pivot point of the front wheel is mounted 2 studs away from it right behind the white number plate ?