Timewhatistime

After having seen the video I am not completely convinced that you got my point. The example in the video works just because you used obstacles that work: (1 plate + 1 L (i.e. panel)) equals approximately (no obstacle + 4 plates (i.e. a green brick with a green plate)) So, in sum there is nearly no height difference between rear and front. (The small difference is compensated by the unavoidable backlash, I presume.) You are right: With this specific configuration (and its equivalents), there is no need for a central differential. However, there are other configurations which would require one, viz. configurations which don't add up to an (nearly) equal amount. An example: Place the panel and the green thingy under the front outriggers - and no obstacles under the rear outriggers. (I believe this will not be a situation a true camping enthusiast would fear, will it?) I'm pretty sure you will see the effect... Another thing: There seems to be an illegal connection (3:40 min in the video) in the trailer's towbar: The second blue 3 L pin is squeezed into two angled liftarms. It cannot be inserted into the pinholes completely.

I'm happy that you were able to get my point from my deficient description. :-) I look on the issue from a rather technical point of view - without having the pragmatic view of a real Aussie camping enthusiast. From your answer I conclude that there is no middle differential.

The trailer's outriggers obviously gave some reason for questions and discussions. Here is another question: I cannot see a middle differential. Both differentials seem to be driven by a worm gear/gear simultaneously. So, is there a middle differential (in addition to the rear differential and the front differential)? If not, the "sum" of the front outriggers' travel must be the same as in the rear. In other words: The four outriggers are not completely independent from each other; they won't be able to adapt to every height differences.

This is a great alternate model with very charming and clever accesoires built of the "leftover parts" (chairs, grill, quad). It gives some nice summer-adventure-outdoor vibes. I'd prefer some colored accents on the living cab (though it matches the real vehicle's cabs very well) in order to make it appear a little bit less bulky, but I cannot estimate if there are any suitable parts in the set.

Purple hook-lift truck The functions are operated manually: There are four black gears on the top of the cabin: 20 tooth gear, steering of front axle + rear axle (if not lifted; if the rear axle is liftes it is locked in middle posistion) + steering wheel) 12 tooth gear, left: liftable rear axle 12 tooth gear, right: extractable rear bumper 12 tooth gear, middle: long Linear Actuator for hook-lift function and dumping The red lever on the left side is for mode switching (hook-lift or dumping). The black 12 tooth gear at the front of the container controls the opening tailgate. Driving functions: The three beacons (two on top of the cabin and at one the rear) rotate while driving (generally, this is my favourite function which I do ever since I built MOCs within the last 35 years. Almost every MOC of mine has rotating warning lights :-) The fake engine (V 6) works while driving. Front PTO (right above the licence plate) Link to the discussion topic: [TC 27] Purple hook-lift truck - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums

Hi Eurobrickers! This is my first time participating in an EB-contest. It all started by simply lurking around all the great MOCs here in the last few weeks, then I began to tinker around with a rear axle which was suitable for the 49.5x20 wheels, which I hadn't used appropiately - up to now! I did a lot of hook-lift trucks in the last years. However, I always based them on the Arocs-sized wheels (62.4 x 20). The "Fire department all road / off road truck by steph77 [TC27] Fire department all road / off road truck - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums was a strong inspiration for me. I modified the virtual pivot mechanism for a long Linear Actuator so that it's range is used in full extend, and the forces are minimized. It was this MOC which led my view on the ingenious double-action locking mechanism of 8052, which I modified as well. From the first attempts with the rear axle to the last funtion (opening tailgate), this MOC took only 100 hours to be completed. So, here it is: The purple hook-lift truck (nearly two sets of 42069 had to be slaughtered for it ;-) ) All functions are operated manually: There are four black gears on the top of the cabin: 20 tooth gear, front: steering: front axle + rear axle (if not lifted; otherwise locked in midlle posistion) + steering wheel) 12 tooth gear, left: liftable rear axle 12 tooth gear, right: extractable rear bumper 12 tooth gear, middle: long Linear Actuator The red lever on the left side is for mode switching (hook-lift or dumping). The black 12 tooth gear at the front of the container controls the opening tailgate. The three beacons (two on top of the cabin and one at the rear) rotate while driving. Generally, this is my favourite function which I do ever since I built MOCs within the last 35 years. Almost every MOC of mine has rotating warning lights :-) The fake engine (V 6) works while driving. Front PTO (right above the licence plate) Overall view: Steering is done by the black 20 tooth gear (HoG) on top of the cabin. The steering wheel in the cabin rotates. The rear axle steers (counterwise, of course) or is locked when having been lifted, respectively: Rear axle can be lifted (by worm gear with dbg 8 tooth gear) - operated by black 12 tooth gear on the top of the cabin, left side: The rear bumper can be extracted (which usually is done when the container is transported on the truck) - operated by black 12 tooth gear on top of the cabin, right side, which drives another 12 tooth gear at the bottom of the vehicle; this gear in turn moves an old 8 L gear rack (see images above). Hook-lift mode: Dumping mode: The long LA is operated by black 12 tooth gear on top of the cabin, middle position. Switching between the two modes is done by the red lever (color coding: red lever - red bushes) There is a little cut-out in the container to see the switching mechanism (red bushes) (heavily inspired by 8052): Brickshelf Gallery - 20240829_183357.jpg The rear tailgate of the container can be opened (by worm gear with 8 tooth gear) - operated by black 12 tooth gear at the front of the container: Front beacons rotate while driving - as well as the fake engine (V 6) underneath the drivers' seats and the front PTO: Rear beacon rotates while driving: Some bottom views: You can find all the images on brickshelf.com: Brickshelf Gallery - for Eurobricks contest TC 27 Feel free to comment!

Ah, now I see. Thanks for your answer. I really like the hidden switches stacked in the 5x7 frame; never seen this solid configuration before.

Still a very dense MOC with a whole bunch of technic functions. This is the kind we like! How do you operate the three switches for the changeover catches on the left side of the truck? They seem to be squeezed in between vertical liftarms so that they can't move... There must be a trick I didn't get.

Sure, my first thought was the kart's gas tank as well. Otherwise the kart wouldn't be able to drive and drift in this nice manner, would it? Thanks for relieving the poor toggle joint (and the Eurobrickers who are trying to keep things legal) from stress.

... and the L-motors are the legs... but what is the servo motor...? I really like the overall apperance, the drift maneuvers and the moving driver. Very nice idea and one of the few instances of integrating the battery box and the motors in a decorative and structurally relevant way. My only concern is about the toggle joint at the steering wheel. I believe there must be better and more "legal" ways to do that.

They say the pin joiner is crafted from an even bigger pin joiner...

The predecessor of the 2L pin connector didn't even have the slot/cutout: Technic, Pin Connector Round 2L without Slot (Pin Joiner Round) : Part 75535 | BrickLink

Judging by the images, I wouuld recommend to stick to the 15 L wide body. It seems to me to have correct proportions given the enormous length of the vehicle. The remaining space could be used for easy cable routing, which is a rarity! Once you have managed to put in the direction switches by gear boxes, you should stick to them as well imho. It's impressive technical-wise... and for me it's an advantage in terms of playability AND technically to have the choice: One can switch directions either by battery box or (and) by gear box.

I really really like this kind of image, though the hints and insights are too sparse to understand how and where all the technic happens. Maybe we'll get more information in the future. Until then the density is simply a feast for a technician's eyes.

My question doesn't aim at ROSch exclusively... What's the point of the differential? With one in-/output fixed, there's no purpose of using it, as far as I see.

In 8843 (yellow and red pneumatic forklift), this kind of tread is inserted into a technic brick's pinhole, so it should be as well legal to insert it into a liftarm's pinhole. See building instruction, page 15: https://technic-dialog.de/Homepage/index.php?page=4&sub=manual&modell=114

The feature to remove the boat could have been playing a role for TLG's decision against a pump whicht has to be pressed (besides the smoother motion, which could have been achieved by a small manual pump as well): If there was a pump mounted on the stand, a pneumatic hose would be necessary to vonvey the air into the boat; this pneumatic hose had to be disconnected every time you take the boat from the stand. Whereas a clever axle connection (maybe by a pair of gears on at the bottom of the boat and the other at the top of the stand, respectively; or a dog pin/tappet mechanism (is this the correct term?)) will disconnect and reconnect in an elegant way...

Oh yes, the property to absorb bumps and to prevent the steering wheel (and the driver) from vibrations is a very convincing aspect of the steering setup with a worm gear. Thank you very much for mentioning this!

This is the right occasion to ask a question which has been bothering me for a long time. I'm sure, here are the experts to answer it! The steering is - as everything else in this MOC - very realistic. But what's exactly the point in converting a rotation into a movement (by 6L worm gear and black counterpart) and then in turn converting it back to a rotation (by 4L gear rack and 8T gear)? Wouldn't it be easier to use a bunch of gears or maybe a cardan or a chain or whatever? Everything seems to be easier than a two-fold sliding mechanism, which needs bracing, lube, and which consists of many moving parts which can hardly be protected against dirt or moisture? What is the advantage of this mechanism? (It must be a big advantage, I believe, because it wins the trade-off with the alternative solutions...)

Maybe these videos can be helpful: Moreover, I'm pretty sure it's possible to determine how many revolutions are required to steer and the range of movement of the black cube by looking carefully at images or stud.io renders. My guess is that one revolutions equals a movement of 3L or 4L. And even more sure: There will be some EB-members who own the 6L worm gear and know the answer... :-)

At the front axle, a black 12 T double bevel gear drives the dbg differential. (Usually, this type of differential meshes with a 20 T (double) bevel gear.) So, how did you achieve the half stud offset?

Maybe the changing between counter steering and crab steering is achieved by a kind of Baker valve gear, which is described in the "most challenging mechanism" thread? I could imagine this would deliver some good results and could be implemented in the 7x3x3 space. So, the red bush would indicate the position of the controllable pivot.

Ah, now I see. Thanks. I was confused by the artificial shadows in the rendered images. After your explanation, I could identify them as mere shadows.

For anybody who doesn't like this kind of riddles about a well-kept secret: The crucial part must be the grey knob gear with 45 degree offset, appearing in the 42167 garbage truck for the first time.

So, once again: I am talking about the image explaining the two steering modes. There are three columns of renders. I am talking about the middle column. This middle column consists of three small images: The upper one (1) shows the steering mode which turns both axles in different direktionn (for smaller turing circle). The second one (2) shows how the red 2L axle connector is turned. The one at the bottom (3) shows the crab steering mode. I am talking about the parts directly left from the 3x3 biscuit part: red bush on some kind if axle; two thin 1x3 liftarms. You indicated these parts with a straight white arrow in (1) and (3), respectively. In (1) and (2) they are arranged in the same way; in (3) they seem to have changed their places.