AdamFMX

Oh I tapped on +...

As NV said, it is signature feature of Tatra chassis. It is in reality about 7-8 cm. P.S. why quote button doesnt work?

So here is first tech demonstrator. It is kinda different than in LDD because I don't want to disassemble models currently on display (they have what I need) and plus parts which will be ordered. For now no tires and no steering-latter is for purpose-tech demo won't have steering. In following days I will connect wheelhubs and add one old PF XL motor to test gears. Suspension travel looks good enough, it is sturdy enough and it doesn't force shock absorbers to bend. Only problem or issue currently present is higher rolling resistance than anticipated but still it is not too bad-I have seen worse. I just hope that it will work. P.S. 2GodBDGlory: Civilian Tatra 815, mainly semi tractors and dumpers, had double tires while still they had swung halfaxles with some angle, though when loaded halfaxles straightened up. Same will be my case. And if Tatra chassis will fail or it will be good only for showcase, I will redo it to normal live axles.

Yeah, I know about rear. For now it is just copypasted and doubled front axle stripped of steering mechanism and reworked halfaxles to fit double tires. It is loong way from finished product. But today I have time, so I am starting to work on real world prototype

Progress report: gearing issues cleared (I think), steering reinforcement and main point of program-rear axles! It is really modular system if you can forgive gap between rear axles and bit complicated front axle. Kind regards, Adam

Guys, for rear double tires which option is better: A:) tight version-no shaft extension between rims, rims are as close together as tires allow (81.5x29 tires) B:) wider version-with classic shaft extension between rims, rims as close as extension would allow I prefer more A, but since B is wider, I will build rear axles in mind with B and if in case that A will be better, there won't be problem

Yes it is, but from third party sites. But I found reliable source internet archive or something like that. Search for version 4.3.11. And here on forum is topic with part updates, although it is not easy to do

Hmmm. Gearing on Zetros is quite ridiculous, so if I will use gearing, it wont be much. And doesnt have Zetros other reductions than hubs? It was some time ago when I was building it. And that real Tatras-depends on customer-they have three types of reduction-any, light and heavy. I really need to build it and test it.

Zerobricks: Are we talking about 1:1 gear ratio or same gear ratio as Zetros? Because planned gear ratio will be 1:1, no gearing at all. That friction thinga is different story though. But I will see how it will work. 1gor: I want to carefully plan it as I will be ordering bricks (minimaly tires) and delivery time is 15-28 work days so even if I would have it done now, still I must wait for order to arrive. And order is still not final. But Iwill try to advance with it as fast as possible. But thanks for interest. P.S. Thanks for that screenshot shortcut

Thanks. Today I made some progress, still working only at front as it is hardest part. I did the most important thing-steering, then suspension (it will have very small suspension travel according to LDD but LDD hinge tool is questionable) and for last 30 minutes I was working on motor placement and bodywork attach points. Rear axles will be easier but I am curious how will turn out main power shaft to rear as there won't be much vertical place. But since I overcame front axle (I think), I should be able to finish it. ANd if not, I have pair of helping hands, which have some experience too. Steering (so moving) components are highlighted but ignore few connection parts, as I used zone select. Powetrian layout will be similiar to 42129's (MB Zetros) one but difference will be no diff lock as there is really no space for it. For now. And I am slowly begining to think, that LDD hates me for that halfaxles as it sometimes looks like whole model is weirdly rotated. More coming at Friday (the soonest option, maybe later) as tomorrow I have veeery long school day (still high school student, so I am taking up as much free time as possible without influencing school results). See ya next time, Adam

Hello, few days ago I got idea how to do almost real Tatra chassis. Out there are a really lot of Tatra chassis designs, hovewer majority follows two concepts: either central shaft (halfaxles swinging around one axis-for this is real Tatra famous) design without differentials (no place for them-in reality Tatra uses shaft-in-shaft design-so technicaly it is not Tatra while very similiar) or two shafts, each with own motor (no diff needed but since halfaxles are swinging around two axes, it is not Tatra). I did't want to use either design, I had to came up with my own. My concept uses halfaxles swinging around one axis-central shaft, while each axle module (again like in reality-Tatra is basicaly Lego-they can assemble every chassis which you can imagine with ease) will have own diffential (sadly no difflock as there won't be place for it). Shaft from first, closer to diff axle was not problem-it is direct. Problem was how to get shaft from second halfaxle to diff. Solution was quite trivial-reroute it above halfaxle swing points and diff, descend to original heigh and from back to diff. Just plus 4 gear wheels. Problem solved. I decided to use Audi RS Q e-tron Dakar car tires as I liked tread and Arocs (because my first set with these 62.4x20 tires, which I used quite lot) tires were kinda small but classic 81 balloons were too wide. Here are some photos of front axle (rear will come later as it will be easier, front can stop project). But I must come up with some reinforcements, as I am excepting to final model be heavy and this can work with lightweight things. This all was during this Friday, Saturday and particulary Sunday. Now, second toughest part-steering. This will be interesting but I have some ideas. But I will appreciate some tips and ideas. And why is topic named Pacific-Tatra T16-7? Funny story. I got idea to make offroad logger Pacific P16 after playing Snowrunner for while. But I thought that it would deserve better chassis. Yes, real one is very good, but which truck is current road legal offroad king? Without doubts, Tatra 815-7. And idea was on world, to combine these two beasts into one ultimate truck. With ultimate design tool. Lego Technic. That's it for today, I will post here after some progress is made. Kind regards and happy building, Adam

Hi, thanks for advice but I dont have problem with installing LDD itself. Either Flash player glitch is not happening. But I have trouble to add new bricks. I every time use LDD Extended so it is not unknown territory for me but I cant get to work that new parts. Either they dont show up, only they show up, or any parts are visible at all. But once again thanks

Hello guys, I am trying to update my LDD database according to manual (I have 64 bit Windows) but I keep failing-either every part is gone, new parts are only present or nothing happened at all. Can please somebody make video how to do it? My LDD version is 4.3.11, Windows 11 Home. Thanks.

Hello guys, I am trying to update my LDD database according to manual (I have 64 bit Windows) but I keep failing-either every part is gone, new parts are only present or nothing happened at all. Can please somebody make video how to do it? My LDD version is 4.3.11, Windows 11 Home. Thanks. P.S. Sorry, I didnt wanted to write it here, can somebody delete it?

Hello all, I spent quite lot of time to figure out how to do good steering for my Tatra chassis. It is very different from others-it has halfaxles pivoting around one axis while differentials are present. And that is fact, why it is different-most of MOCs with halfaxles pivoting around one axis dont have diffs because there is no room or diffs are present, but on designs with halfaxles pivoting around two points. This is only issue of my chassis-I found one solution but it is far from optimal-mostly becasue small steering angle. The fact, that steering rod is in front of axle, so no Ackerman, is obvious and logical-there is no room for it from other side (or maybe?). P.S. Current wheels are not final ones but model would work with these too (planned are from Audi RS Q e-tron Dakar car but LDD doesnt have them in repo-I have Stud.io too but I am not much familiar with it) Any ideas are welcome!

Hi, I am Adam and I high school student from Slovakia. I spent alongside Lego, especialy Technic quite lot of time, mainly helping my dad with his offroad creations. It whole started before 10 years, with my first Lego set. I catched my attention and later as I had built few sets, I got slowly into modifying original ones, as I was not satisfied with details. Later I got my first Technic and it was unstoppable. Today, I have already few quite big sets behind me, for example Liebherr R9800 or MB Zetros, also MOC is not unknow word for me. From little and small, trough some original ideas, to motorized Technic MOCs. I am most proud about The John, 4x4 kit car built by Holy Trinity of car-shows in Grand Tour. It is 4x4, suspension is in form of live axles, IR receiver masked as TDI 110 engine and crates above rear wheels can be used as storage room. And I have few ongoing projects too. Alongside Lego, I am kinda history buff, virtual farming enthusiasist, virtual offroad trucker and spaceship Commander with Elite ranking. Also car enthusiasist, train spotter, flight simmer, space nerd and occasional photographer. Let's go buildin!