60 replies to this topic

[MarkusOSX]

Hi there,

i´ve made my first 8x8 TrialTruck with LDD.

1787 parts.



Saddly i don´t have the parts to build it. Maybe anyone of you want´s to try it in RL  

If interested, write me an i´ll send you the instruction.

Greetz

Markus

Edited by MarkusOSX, 26 September 2012 - 06:48 AM.
Added 'LDD' in title to clearify

[Superkalle]

Hi

Great looking truck

I'm moving this over to the Technic forum  

[Zblj]

Looks good, but the suspnsion angle is waaaay too steep.

[MarkusOSX]

Hi Superkalle,

thanks. Atm I'm trying to get all the parts at Ebay I needed.

Greetz

Markus

Zblj, on 23 September 2012 - 06:39 PM, said:

Looks good, but the suspnsion angle is waaaay too steep.

Do you think ? I've found many pic at IT with an angle simliar to mine. I'll try try it and change if its really too steep.
But thanks for the info.

Greets

Markus

[skylinedan]

I can build that, I like your axle set up. I do agree though, the wheels have way to much positive camber. If you can just move the shock mounting points inward some and it should set the wheels better. I,d like to see the directions to this, very interesting. I ,d have to build it in
yellow though, not orange.

    Dan

[DLuders]

@ MarkusOSX:  I looked at your Flickr photoset, and can see it's a good-looking truck!  

      

Edited by DLuders, 23 September 2012 - 09:33 PM.

[drdesignz]

MarkusOSX, on 23 September 2012 - 06:44 PM, said:

...I'm trying to get all the parts at Ebay...

Are you not familiar with Bricklink?  That's the way to go.  Check it out:  Bricklink.com

[MarkusOSX]

Hi @ all,

and thanks for your replys.

@skylinedan I'll send you the links to the LDD File and Manual tomorrow, so you can try it  

Please send me an email, I can´t send you a PM here (Error) markusosx@googlemail.com

And also thanks for all of your tips.

Greetz

Markus

drdesignz, on 23 September 2012 - 09:45 PM, said:

Are you not familiar with Bricklink?

I´ve heard about it  

Thank´s for the link

Edited by MarkusOSX, 23 September 2012 - 10:15 PM.

[MarkusOSX]

btw I've chosed this wheel angle to get the most traction out of the ballon wheels.

[Sariel]

It looks heavy, and 1 shock absorber per wheel may not be enough to support this weight properly. I think the sideways stability may not be good, too - the truck is tall, the heavy battery boxes are high in the chassis, and with portal axles at this angle you make it even taller, but not wider. One more reason not to build Trial Trucks with LDD only - LDD can't test it. Right now you put a lot of work into designing a truck that is completely untested. I hope it works well when built, but I think LDD is better suited for designing more static stuff, like castles.

Edited by Sariel, 24 September 2012 - 07:00 AM.

[Bricktrain]

It looks good, I would be interested in building it, we have a lug 4x2 offroad challenge coming up it might be worth building it for. I think the suspension under load would settle enough to lower the camber angle anyway, it would still have plenty of droop travel, still it wouldnt be hard to fine tune the suspension, I have a selection of springs/shocks to test it with.

[efferman]

one shock absorber should be enough, because a soft suspension works much better than a hard one. but i think your center of gravity is to high in proportion to the actual trackwith. it will easily roll over the side. and are you sure that your steering system will work?

[MarkusOSX]

Hi all,

Sariel, on 24 September 2012 - 06:58 AM, said:

One more reason not to build Trial Trucks with LDD only - LDD can't test it.

I´ll use two virtual designers. With LDD I make the Model (design) and with SR3D-Bulder (with Animation Console) I´ll test the functions.

I think it´s first possible to see if the suspension fits or not if the model is build in RL. But it wouldn´t be to difficult to change it.

Your right with the center of gravity. Maybe one batterypack should be enough for these 3 motors, but atm i didn´t find another place for it deeper in the chasis.

Meanwhile this was the fifth version  i´ve build virtual.

Another Concept with lockable differential and 2 gear speedbox

Greetz and thanks for all comments.

Markus

efferman, on 24 September 2012 - 08:18 AM, said:

Are you sure that your steering system will work?

I guess, there was nothing complicated  

Edited by MarkusOSX, 24 September 2012 - 09:54 AM.

[efferman]

why not mount the batterybox like this

101_9757 von efferman auf Flickr

101_9759 von efferman auf Flickr
testing with the animation consol works only to look if anything is able to collide with moving parts. but driving around on uneven surfaces are something completely different. in your case a swingarm suspension like tatra works under load completely different than with the simulation of a program.
a tatra suspension looks really simple, but i think it is very hard to make it good working without sideway rollovers

can you please share the ldd file with us?

Edited by efferman, 24 September 2012 - 10:06 AM.

[MarkusOSX]

This battery position looks good. Maybe i need to strech a little between the two motors to get the battery between there.

Thanks for these helpful pics

Greets

Markus

Edited by MarkusOSX, 24 September 2012 - 11:47 AM.

[MarkusOSX]

I think i´ll re-design the truck a little bit these days.

Trying to get the center of gravity a little bit more to the bottom (maybe only using one batterypack) and changing the angle of the wheels.

For those who i´ve send the LDD-File an instruction; please wait a little bit for "update"  

Greetz

Markus

[DLuders]

It looks like it will take advantage of the rounded tire profile of the Lego Balloon Tires:

[MarkusOSX]

Hi there,

what du you think of this gravity center setup ?



..and this angle of the wheels ? Wheel distance is now 2 studs more.



Greetz

Markus

Edited by MarkusOSX, 25 September 2012 - 07:08 AM.

[efferman]

much better, now the tendence to roll over the side should be minimized

[MarkusOSX]

efferman, on 25 September 2012 - 07:21 AM, said:

much better

Ok, so I´m trying to build it new with this setup.

Thanks

Markus

[MarkusOSX]

Ok, i build it completely new.

Not finished but good to see (thanks @efferman):

Edited by MarkusOSX, 26 September 2012 - 06:49 AM.

[MarkusOSX]

Ok, endrun...  

The Chassis is ready. The cab should also fit in size and length, but need to positioned (not so easy in LDD)and some little corrections.
Parts will be between 1800-1850 if finished.

Hope you´re also satisfied with the new setup for gravity center and wheel angle.



Greetz

Markus

Edited by MarkusOSX, 26 September 2012 - 09:24 AM.

[MarkusOSX]

efferman, on 24 September 2012 - 10:02 AM, said:

can you please share the ldd file with us?

Sure, i´ll share it, if the new version is finished  

[MarkusOSX]

Almost finished.

I like the new version, look a little bit more "dangerous"  

[MarkusOSX]

Ok, time to compare:

1799 Parts

Both trucks had the nearly same size cabin

The trackwith is two studs more at the yellow one and the wheel angle is not so steep

The whole truck is "flatter"

The length is two stud shorter

Think the best position for the Battery pack. Easy pull out from the underside.


This version only uses one battery pack and only one IR receiver.

I guess the truck is now more useful designed for trail, but i like the style also from the first version.

Big thanks to efferman for his suggestion with the battery pack and also thanks to all other and their ideas.

Last but not least: Which will be the best color for it ?

Yellow?

White?

Black?

Grey?

Red?

Orange?

Green?


Cool would be violet, but i don´t know if the panals are available in this color


Does anyone know a good and free file sharer for the LDD file ? I would like to share it to everyone.
Would be nice to see in RL.

Greetz

Markus

Edited by MarkusOSX, 27 September 2012 - 08:40 AM.