Scania skip truck

[GuiliuG]

This time, it's my scania skip truck that I present. You have maybe already seen it if you often check brickshelf galery.

Let's start by a summary of the building process.

It was the first version :

When I firstly presented it on setechnic, some members told me that doors were to big and I redesigned a new cab :

Its suspension system was a flex one :

It owned an integral transmission, a front axle steering with ackermann effect and a gearbox to switch from driving to skipping. Unfortunately, this first version was unable to drive. See the problem :

So, a long reflection process began where I sought were the problem was. I removed front driving, without any change, removed only rear axle driving (so the front one was still in place in this trial), without any change.All the trials I did to find the problem was unsucessfull. So, I decided to change from flex suspensions to classic spring one to see if there was any difference. Indeed, as you can see on previous pictures, all axles are not positionned on the same straight and the curvature on the right or left flex is not the same ( for a same axle), resulting on a truck not perpendicular to its wheels.

You can also see here the fake engine, driven by front axle ( which explain also why I can not remove front drive)

I also removed dual wheels on rear axles to reduce friction. With all these changes, truck drove better than previously, but it was still not perfect. So, desperated to ever find what the problem was, I removed again front wheel drive and it worked now very well ! Unfortunately, I wanted this truck to be able to drive over some obstacles as lego bricks and rear axles are not strong enough to support torque without gears skipping. Front axle is the only one where gear can no slip. I decided naturally to create a second gearbox, below the first ( remember, the one which change from driving to skipping) which allows me to change from all wheel drive to 6*4.

The final version was born :

Naturally, doors can be opened :

With a front loader, which will be soon feature on EB :

And finally, the video for the new version :

This truck is already disassemblied, pictures of this process will be uploaded soon.

Edited July 12, 2012 by GuiliuG

[Alasdair Ryan]

Very nice truck.

I hope to build a truck soon.............

[timslegos]

I hope to build a truck soon.............

Don't hurt yourself .

Nice truck. How does the LA have enough power to lift a huge bed? Nice suspension idea as well.

tim

[Starbager 1]

can they please make an action video of loaders and trucks

[GuiliuG]

I can lift up to one kilo on the bed ! The La is powered by a Xl motor, don't forget it ;)

[Alasdair Ryan]

Don't hurt yourself .

tim

Don't worry i won't.

Do you think your truck could of done with being a bit faster?

[GuiliuG]

No, it's too heavy, it weights 2kg200 and only one Xl drives it. With less reduction, it won't be able to drive over some obstacles.

[Alasdair Ryan]

Ah i see,are you going to make a few different bodys for it?

Ps your dumper,unimog,grader are really cool too,too name a few.

[TimH]

Very nice truck.

[kieran]

Action shot with the front loader really brings it to life, nice one

[bb15080]

nice truck to bad it is heavy

Is there no way to lose some weight?

GuiliuG something else how far are you with the hydrema dumptruck?

[GuiliuG]

Thanks. No way to reduce weight I think because I have tried to optimise a maximum the construction.My hydrema dump truck is finished, I will prensent it soon.

[GuiliuG]

Here they are : some pictures during disassembly process :

And you can see all of them here :

Mygallery