Void_S

Yep, exactly. Moreover, for sandy off-road (when the special sand "grabbers" aren't available) it's a solution to put all tires reversed as the inverted pattern grabs the sand under the wheels to "float over the sand" whereas the normal pattern direction will just dig the truck deeper. Even the simplest things are ticky sometimes.

Keep calm, that was about the same thing for a new blue 20T clutch gear that was exclusive for Chiron for the first time and now can be found in way cheaper sets. (Yes I realize that it's not the best explanation for Changeover Rotary Catch but it may appear only in the set that has a large enough gearbox)

They were issued only for 2002-2006 sets (13 years ago), so it's impossible to find them as new parts. As for the replica, it should be a challenge I believe, as they were presented in rare enough sets and before the mass copycat age. As it's not a welcomed topic here, at EB, I would never recommend you looking for Mobile Crane 8421 analogs.

Hell yeah! Last time when I was trying to make my 42029 doing wheelie (it was my fist set after my dark age) I was really disappointed with those (now, may I call them "old"?) CV joints weakness...

@Erik Leppen, I think it's due to a purpose of the parts: in the Technic series they are mostly just structural elements and it doesn't really care if they are in a neutral color like black or gray shades, the model's color is claimed by the panel elements meanwhile. For the Systems (I still use this name for brick+plate sets) these parts are structural + visual elements in the same time and it seems that TLG had no choice to color them properly as they are integral parts of the sets. Imagine that green or white Porche 911 with LBG connectors

To be honest, I still believe 42098 is 2L wider than 42078 in total: I have counted it by L-curved panels position (in the front of both trucks, they have the same interval between but 42098 has +L from each side for wheel arches. However, remembering that the COE (Cab Over Engine) trucks are really wider a bit in order to compensate the limited cab volume: it's really shorter and has an engine inside, yes, right, they are really in a very similar scale. As for the sizes in general, why not to make them a bit bigger? It makes sense when you're about to make it full of tasty features and functions inside

@fosamax, thank you! I was trying to do my best to fit all the necessary functions here but nothing is perfect, so I'm going to keep these things updated once I found some possibility to add anything new. Regarding the "big pack", you're reading my thoughts, I haven't finished all the things yet, so will publish it in a few days. And additional thanks for the "extra parts" list idea - it's not a C-Model but really heavily overlap the trailer and container assemblies, so someone really might be looking for just extra parts needed. Edit Just some few more MOC, heavily based on the original Flatbed: American-style semitrailer with sliding tandem (box) The full gallery: https://bricksafe.com/pages/Void_s/42078/flatbed-sidewalls-us It has the same features, plus openable rear side (rotates at 90 degrees to support some extra long payload and the second possible position for kingpin - for coupling with a deeper installed the fifth wheel, like tri-drive trucks (with 3 rear driven axles). The parts list is on Rebricakble. As it also has the towing hitch, it could be assembled with a kind of road train together with the previously mentioned dolly: American-style semitrailer with sliding tandem (dry van) It's the third variation, now a merge of the previous one and the original container from the A-model with slightly rearranged doors and locks. Like the previous ones, it's built using the modular technique (the LBG liftarms between the panels are the borders of these modules), so it could be done in 5*11, 6*11 and 7*11 units. I haven't deal with the scale ratio yet so can't say the size in meters/ft. Also, thanks to the roomy enough space around the kingpin, it is compatible even with such tri-drive truck (the axles cart is very compact here so the kingpin is on the normal position). The part list is on Rebrickable and the full gallery is on Bricksafe.

Yep, and there such sets like 42030 or 42078 look even way better as they are licensed and have also licensed B-models. But it really shouldn't be a boring time making C-modes with such a big number of parts (plus the motors...).

Well, in the "general use" yes, but personally I'd enjoy a possibility to see, let's say the load or speed difference between the motors (read: axles) when passing trial's obstacles. Off course, it depends on how much this "nice addition" costs... Plus, auto speed decreasing of a slipping axle... Traction control, ESP - all that in a child's toy. Ah, dreams... Probably, the main point here that this model is not a clear "off-road best performer" but still capable crawler that is, first of all, a proof of concept of new PU features.

Yay! Look who's here again! How I love these compact models that are just full of all possible and impossible (but still appears as possible) functions. I still can't believe how such size may fit seems to everything from the real car, all but the last zip lock at the driver's armchair.

I think it's for transmission saving: PF's XL-Motor easily brakes the axles and gears, so it was a rick that PU's one may chew the diff as well... So, taking into account this gearing, the full (known) ratio is as the following: 20:12 > x1.666667 20:12 > x1.666667 (2.777778 subtotal) <Differential + CV joints> 1:4 (new wheel hubs?) > 0.25 (0.6944444 total) In other words, it's in 1.44 slower than motor output.

It probably means that the front axle (would be better to call it now as a half-frame?) contains the XL-motor and L-motor together. So, like it was said here, the steering should be more stable and accurate. This order, I believe, works better as a shock absorber, slowing down the whole suspension assembly movement about the chassis.

I would follow the logic that is clearly visible for TLG's models (like for 42005, 42095 and many others): One model is a heavy-duty offroad competitor The second is a high-speed kind of buggy or trophy-like racer This particular one, like 9398 as well, have a great potential to be rebuilt into something RWD with soft rear subsection and less reduction ratio.

Really nice model

As I can see, they are: Front outriggers (independent control for each one) Rear wheels steering via HOG (exhaust pipe or warning beacon) Boom raising and extending that works at once (like the boom and winch in the B-Model) Fork tilt control (lockable at the end position) May be some more of them...

Take it as a kind of challenge: build the model using only some photos and then compare your result (your way of thinking, imagination, skill, building techniques, some interesting features) with the TLG designers'. Like a training for "see the picture > known how to build it inside" skill that is very valuable for MOCs are based on the real-life prototypes. I tried to do the same for 42069 (can say that succeeded at about 80%) and the most of time I was like "whoa... now I know they have done that"

Moreover, the whole cab is very similar to 8041/42041 but with smaller wheels and new L-shape panes at the front.

Finally, I have found the MOC that I was thinking about when saw the 42099 photos in the proper colors for the first time: https://rebrickable.com/mocs/MOC-6023/filsawgood/crawler-4x4/#comments

I afraid it has no winch The only possibility to have it is to add some PTO with distribution gearbox to drive the car and pull the hook at the same time, otherwise, it requires one more motor. I wouldn't bet on that.

Right, event when two wheels on the same axle are locked, one of them is always less locked (it's a physic of our world) so the diff will spin the one that it easier to move. It's a common pain for "offroad" models that poorly performs, but TLG cannot afford using a locked transmission. As I remember it was discussed many times here, at least once per year when another offroad/crawler-like model comes

hjxbf means the assembly that I have mentioned in the "Number #2" in my post above. This thing really works but here is hard so to see if the rear axle has this feature. Moreover, at the image the only front axle is inclined (rear is parallel to the whole body), so the most realistic thing is the only front axle is pendular.

Well, I can't say I see something that may prove or debunk the rear axles pendular suspension. But... as there are only three motors, the following combinations are possible: Number #1. The most possible (as the most logical) scheme. Front axle: pendular + spring-loaded independent wishbones. Driven by an on-axle mounted motor. Rear axle: spring-loaded independent wishbones. Driven by an on-axle mounted motor. "Servo" is in the middle. This combination has a good power to drive (2 motors) and can oscillate moderate obstacles, however having some side instability when the rear axle is inclined. Number #2. A better obstacles oscillation. Front axle: pendular + spring-loaded independent wishbones. Driven by an on-axle mounted motor. Rear axle: pendular + spring-loaded independent wishbones. Driven by an on-axle mounted motor. Both axle's turntables are linked like in offroadcreations's monster truck. "Servo" is in the middle. This combination has a good power to drive (2 motors) and can oscillate moderate obstacles, plus more stable than #1 option because of self-controllable pendular axles. However, I can't see the traces of the same turntables embracing at the rear end, so it seems to be just a private opinion. Number #3. A better (and more interesting!) obstacles oscillation. Front axle: pendular + spring-loaded independent wishbones. The pendular rotating table angle is driven by an on-axle mounted motor. Rear axle: spring-loaded independent wishbones. Both axles are driven by a single motor. "Servo" is in the middle. This combination does not provide a great driving power (by 1:4 planetary hubs may save situation) as there is only one motor drives the model. But it can rotate (incline) the front axle that provides great controllable oscillation and kind of a controllable weight distribution side-by-side (that was 9398's great weakness). I wouldn't bet on that as it's a really hard task to drive this monster using the only a single motor.

@Yevhen, @Mechbuilds, please send these requests via PM too... Jim just came to the main "2019" topic to stop these posts and is going to come into this topic too. I afraid very soon.

As for me, I really looking forward to turn the B-model's hotrod back to it's original red classic car. The middle and rear parts look way tasty Is it only me, but I can't recall any other model that contained three different wheel types in such scale? I mean it was a chance to get only 49.5 tires for the truck and trailer. I really like that TLG decided to use three types making the trailer more authentic (they are really usually a kind of low-boys to lower to floor) and to make the third vehicle for the B-model. Is that a kind of hot drift van, right? Imagine it's RC mod with servo+buggy motor

Yeah, indeed the colored frames are coming these years!