ponedeljek, 18. julij 2016

Buwizz beta testing

In the course of the last few weeks I had an opportunity to test the newly developed Lego power functions battery and control application, called the BuWizz. For the first stess test I built a massive rock crawler which uses four power puller wheels, four RC motors and the newly developed double torque tube suspension. To help with steering the crawler used two servo motors.

Here you can see the first driving test with BuWizz in normal mode at 1:5 gear ratio:

Few days later we tried a different control mode, called the ludicrus mode, which increases the power supplied to the motors beyond of what a normal Lego battery box can ever do. For that I increased the offroader's final gear ratio to just 3:5. As you can see in the video below the speed boost is quite impressive.

Finally I decided to build a speed - only dedicated model which uses realistic caster angle for directional stability, racing hard suspension, tumbler wheels for maximum traction and a light, yet strong chassis. That model, even though powered by only 2 RC motors reached speed of 25 km/h, as you can see here:

Having experienced the potential BuWizz has in store for increased performance and control, I can only suggest you guys try to make this concept into reality. Thanks to BuWizz team for allowing me to beta test this product and I hoope it does come true.

Support this awesome product here:


ponedeljek, 06. junij 2016

Recap of International trucktrial - Budapest 2016

I pick up my massive hockey bag and drag it on the train. The conductor gives me a weird look. The bag is massive and inside there are two models, the Oshkosh 10x10 PLS and the Ginaf 4x4.
This is the start of my journey to Budapest to the international trialtruck competition.
Dragging my bag across the train I find myself sharing the small cabin with two more people and a parrot in a carrier.
The fellow's name slipped my mind, but he kept calling his owner which he couldnt see... It was rather cute.

Few hours later I was left alone, so I took the time to fix the models which have taken quite a beating on the way... The best thing was fixing the dual X-24 engines on the oshkosh. Since you have to ALIGN ALL CLYINDERS AT ONCE for BOTH ENGINES this felt like doing a brain surgery on a moving train.

After that pleasent rebuild I was nearing the capital of Hungary, Budapest. There Nandi was already waiting for me to do some heavy lifting help me carry the bag and drive me to the hostel. I reserved the hostel few weeks before and this is what I've walked into. Needless to say I felt right at home.

After much needed sleep it was time to explore the city a bit before going to the competition location. I found a near-by Lego store and bought myself some rare bricks in all kinds of unusual colors. Can you say teal, lime and violet studless bricks? In all the excitment I bought two left large panels... But at least I got a flick missile thingy :)

Following that over-exciting purchase Nandi picked me up and we left the city and went to the surrounding hills. The site of the massive green hillside, paragliders and the heavenly clouds left me picking up my jaw. After everyone gathered we took the road to the abandoned sports airfield where we set up the various stages of pain and suffering for our trucks.

If a picture is worth a thousand words, than I'm going to up that with videos showing the highlights of the group ABS plastic torture international trucktrial competition.

As you can imagine we had an awesome time. Like I said on Eurobricks, these kind of competitions bring out the best from people...and the worst out of the trucks :)

I would here-by like to thank everyone for a great weekend. I met a lot of really friendly and nice people, had fun exploring the beautiful Budapest and learned a lot in ways to improve my trial trucks.

See you guys again soon.

ponedeljek, 02. maj 2016

Hungarian truck trial event next weekend

So as you guys might have seen on my youtube and eurobricks I will be joining the Hungarian truck trial race next weekend.

Here are the trucks I will be taking with me, the Oshkosh 10x10 and the new 4x4 truck which I havent named yet.

Here's a picture of the racing location, right next to Budapest.

I managed to reserve a cheap hostel and I will use the spare time to explore the Hungarian capital a bit.

Of course I plan to do a video report of my adventure which will be posted to youtube.
Wish me best of luck :)

Meanwhile, do you have any ideas for the second truck's name? If so post them in the comments.

ponedeljek, 04. april 2016

LDD Instructions pack update 1

Here is the first FREE update to my LDD instructions pack.

All you have to do to get it is to download the updated .zip and use the same password you received from me.

Download the LDD package here

Updates and additions in short:
- Now that the real Oshkosh 10x10 has been built, I updated the LDD pack to match the model.
- Added a few new suspension ideas, such as MacPherson strut and double ball-joint suspension.
- Added a random color generator file - check the attached graphics settings image
- Updated several older models such as Blue 4x4 and Coyote with the newly added parts
- Misc. changes and smaller fixes.

You can expect more free updates in the future, since I still have many unpublished ideas and evil Lego gadgets which I plan to use to take over the world...

četrtek, 24. marec 2016

Finished Oshkosh 10x10 PLS

After over a year of tweaking the digital version and gathering all the needed the parts the time has come...

First a short list of functions:
6L motors for driving - 3x for left and 3x for right driveline
3M motors - 1x for the gearbox and 2x for autopumps
2 Independent dual gear transmissions - Each for one drive side
2 Steering Servo motors - 1x for front 4 wheels and 1x for rear 4 wheels
10x10x8 Wheel drive with portal hubs - All wheels are driven and the 1st , 2nd, 4th and 5th axles steer
3 steering modes - Normal opposite wheel steering , Front only wheel steering and Crab steering
Very long travel torque sensitive double wishbone portal independent suspension on all 10 wheels - Total suspension travel is over 5 studs on all wheels
Double segment working hook arm with a total of 8 pneumatic cylinders - Is able to hook up and load a 0,4 kg heavy pallete
Two newly designed autopumps to power the arm - Each powered by a single M motor
Two X24 piston engines - Each connected to its own driveline side
Detailed interrior with 3 seats and steering wheel - over 20 studs wide this is one my largest cabins ever built

I got the idea for the model while playing with new suspension systems. I managed to build a very compact and robust long travel independent suspension. This suspension also allowed me to build H driveline in which left and right wheel drive are seperated and in my case can be independently driven. This kind of setup has many advanatges, mainly removing the need for differentials when offroading, allowing small speed differences between sides when cornering and improved maneuverability due to independent drive (the truck can even skid, but its not recommended on grippy services).
After searching online a bit I decided to try to make a 10x10 model of a real truck, the Oshkosh 10x10 PLS:

 This was my original reference

Because I wanted this truck to have some speed I decided to use L motors instead of the usual XL motors. But because this machine is also meant for offroading I incorporated a double speed gearbox for each before mentioned drive side. Because I wanted to have more than just a rolling chassis I incorporated a functioning arm hook which can remotely hook up and load the massive palletes. I had lots of room to spare above the front wheels so I filled the space with two X 24 piston engines. For the final touches the cabin was detailed with three seats and opening doors, and the engine was finished up with a massive exhaust and cooling systems.

The finished model is over 85cm long and weighs 5 kilograms

Notice the 8 wheel steering. The front ladders/steps are flexible

Thanks to the high travel of the suspension there is plenty of ground clearance

 The under shot showing the two independet left and right wheel drives

 Another view of the rear steering and the loading arm

 Here you can see the two dual speed gearboxes. 
No broken gears, but switching gears under high load may damage the clutches
 Outdoor photo showing off the truck giving the Coyote a piggyback ride

Front view of the truck offroading

Here you can see how the suspension adjusts to the terrain

 Even when unloaded the suspension still does its job

I also put a lot of time and effort in the following video showing off the finished model in all its glory both indoor and getting dirty outdoor:

As usual with my models I am also relasing the digital version which is available in my LDD package
 The LDD file for the final version can be downloaded along with my LDD package

I would here bye also like to thank everyone who helped me realising this model with your support and donations. A BIG THANKS TO YOU:)


sobota, 19. marec 2016

Oshkosh 10x10 PLS video coming soon....

I am now in the process of video shooting this massive model.

Got myself some fancy LED lights and greenscreen fabrics, they work awesome, here's a small preview:

Expect the finished video in a few days :)

četrtek, 17. marec 2016

Double torque tube live axle idea

 I got this idea yesterday and decided to build it.

Its an improvmement of a classical torque tube suspension, but now it uses 2 torque tubes to form two half axles which are connected to each other via a turntable:

To keep the half-axles from bending away there's a lower linkage made out of 5L suspension arms and some beams:

So what's the difference btween this and classical single torque tube?

Lets start with advantages:
- No need for links or panhrads to keep the axle in place
- Now each axle can have an independent drive, therebye elimenating torque flex
- Or you can use one ball joint for drive an dother for steering
- Can carry much more torque

And there are also some disadvantages:
- Less flexible, maximum angle this setup can bend to is some 30 degrees
- Steering is a bit more complicated, since the axles pivot in the center, you need some ball joints and links
- Takes more space

But you can even expand the concept to use three torque tubes.
Now the side ones can carry power while the center one supports the steering system:

I plan to try to use this new idea in future models, since it allows me to make a vehicle with independent left - right wheel drive with zero suspesnsion torque flex.