aposaric Posted December 12, 2011 Posted December 12, 2011 (edited) Hy folks, here is my first really big Technic exercise. I allways start different projects, but I allways think of something better to do, so none of my concepts ever live to see the light of day. I thought that making this topic will help me to finish something :-) The concept: 1. 8x8 truck, that is going to be capable of serious offroad, aswell as carry a ton of battery boxes, motors and pneumatic stuff 2. I wanted a bimoto configuration, 2x XL engines powering the same shaft ( no differential equaliser, for strenght purposes ) 3. I wanted all four axels to be suspended, but I did not want to use a Panrod technique, I used a semy independent powershaft links in front and rear ( Independent linkage attachet to the turntable ;-) ), to the axles 2 and 3 and carried the omnidirectional joint to the axles 1 and 4. I am aware that the real suspensions don't work that way, but it is really a god solution in lego, because it allows the axles to move like 3 point suspension, but there is literaly no latteral movement whatsoever. 4. I am having difficulties with the steering solution, but I am going to work something out, I am thinking about pneumatic steering or a rubber belt power transfer because all of the movements possible in the suspension. 5. There is going to be 6. Here are only couple of parts that are going to be implemented in the truck in the next days: Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us There is going to be 4 pneumatic outriggers that have to be powerfull enough to lift the truck, and they are going to extend via the small LA-s. The cabin is going to be pneumaticaly tiltable, and there is going to be some sort of a pneumatic crane on the truck, but I still have to think about it. It is going to sport a flat 10 fake engine :-) I am still waiting for 3 M motors and 3 IR receivers, and couple of other parts. Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us Here are some photos, It really still is a Work In Progress, But I hope that I wil manage to finish it in a couple of days :-) I appreciate your comments cheers, a. Edited December 21, 2011 by aposaric Quote
jorgeopesi Posted December 12, 2011 Posted December 12, 2011 It is enormous, but may be the problem you will have, too much weight reduces the efficiency. Quote
timslegos Posted December 12, 2011 Posted December 12, 2011 Wow that thing is huge! i cant wait to see more progress! What kind of crane are you going to attach? tim Quote
aposaric Posted December 21, 2011 Author Posted December 21, 2011 Wow that thing is huge! i cant wait to see more progress! What kind of crane are you going to attach? tim Yes, I managed to reduce the size a bit. I think that it is going to have a log loader, or a car lifting crane, I am not shure yet. It is enormous, but may be the problem you will have, too much weight reduces the efficiency. It is at 2 kilos at the moment :-) It is powered by two xl motors, direct drive, throught differentials Currently it is at 6x8 configuration, independently suspended, here is a video I just made, the chasis is strong and quite capable more to come soon, I have to make some adjustments to the suspension and outriggers Quote
Alasdair Ryan Posted December 21, 2011 Posted December 21, 2011 (edited) Do you have a picture of the real life truck,i can't work out if it is a semi truck (tractor unit) or a off road trail truck,it is getting a bit confusing when you say your going to fit a crane to it. Looks great what ever it will be. Edited December 21, 2011 by Alasdair Ryan Quote
jorgeopesi Posted December 21, 2011 Posted December 21, 2011 Wow, I think it was a trial but not, in this case the weight is not a problem very good work. Quote
yoraish Posted December 21, 2011 Posted December 21, 2011 If you want it to be a good trial truck you might consider again powering the remaining axle. So it would be a real 8x8 Quote
LEGO Train 12 Volts Posted December 21, 2011 Posted December 21, 2011 Nice start and huge prototype! The video is absolutely stunning ...I hope to see the work complete! Quote
aposaric Posted December 22, 2011 Author Posted December 22, 2011 (edited) Do you have a picture of the real life truck,i can't work out if it is a semi truck (tractor unit) or a off road trail truck,it is getting a bit confusing when you say your going to fit a crane to it. Looks great what ever it will be. No, I make all of my models from my head. Looking at the real trucks gives me inspiration, but I don't want to copy somebody else's design. It is currently something in the line of 8x8 Actros http://www.benzworld.org/forums/unimog/1461143-actros-8x8-6x6-very-nice-looks.html But I like the independent suspension in lego, I think that it is the most efficient on carpets and small bumps because it looks very realistic, if you take a scaled down size into consideration. The point of this exscersise is to build a powerfull and very sturdy chasis that can go over 5-6 centimeter bumps, over shag carpet of grass in the garden, and is going to be capable of carrying few attachements as a crane, or a dumper, or other cars, or my cat :-) @ jorgeopesi Yes, this is a twentyeth revision of the chasis, it took me a while to figure everything out, and to prevent cracking of the teeth, and I found out that powering the whole thing throught differentials, and not throuh knobwheels is the solution, at least on carpets and tiles, because unimog tires really have a huge contact surface, and traction is outstanding, so differential is a must. @ yoraish Yes, it will be true 8x8, but I only have 3 of the new differentials at the moment, so I have to order a couple of new parts to complete this model. Rear two axles are powered with one xl motor, directly without the reduction, and first two axles are powered by the second engine. Currently, there is no power on the first axle, so it is only a steering aid, until differential comes. P.S. I really like some of your trucks, they look really capable. When I am finish with this project, I am going to build a true TT, light and powerfull, so I can play with it in the snow @ LEGO Train 12 Volts It should be finished in a wek or two, I suppose that it will be around 4 kilos once I put two battery boxes inside, 6 more m motors ( for remotely powering pneumatic switches ) and some bodywork and cabin Edited December 22, 2011 by aposaric Quote
Alasdair Ryan Posted December 22, 2011 Posted December 22, 2011 Ah now i see that you are trying to build. Quote
timslegos Posted December 23, 2011 Posted December 23, 2011 I am like you too. i used to build MOCs straight off of memory, based on trucks i had seen driving around over the years. i just realized the huge number of parts you are using, and i have to admit my eyes are . Good luck building. tim Quote
aposaric Posted December 24, 2011 Author Posted December 24, 2011 Thanks. Yes, the number of parts is growing rapidly :-) I couldn't buy the differential I was missing nowhere on bricklink in Croatia, so yesterday I bought new 8081 because it is the cheapest model with differential I could find in Croatia, but now I have few other usefull parts for the cabin (black). Quote
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