SilenWin Posted March 19, 2018 (edited) Hi everyone! I'm glad to present you the third version of my trial truck with a long prehistory and a slightly unusual design Lego Indominus Mk3 by Alexey Tikhvinsky, on Flickr Some history now: In the far-distant 2015 @Lucio Switch has built a titanic airfield firetruck that made a strong impression on me. Spoiler The stunning set of functions, motorization, scale and appearance of this monster inspired me to build a modification. Searching for parts and construction took about a year. I wanted to not just change the color scheme or somehow improve already perfect truck - I wanted a total rework of the entire transmission, body and concept in general As a result, we got a truck with a loud name "Indominus Rex" and a claim to conquer the off-road. The 4 most powerful motors (5292) produced by Lego ever, differentials with limited slip (thanks @efferman for idea), planetary gear reduction in each of the eight wheels - all this allowed to overcome quite serious obstacles, even with weight of the model (6 kilograms) and dimensions (92x25x25 centimeters). Modification, judging by the opinions of AFOLs and the victory at the MOCs exhibition in Moscow Megabricks museum, turned out quite good. The flatbed body, a thin (3 pins) frame, a relief roof with air intakes and off-road rubber did their work - the truck moved away from the original as much as possible with the help of some solutions and design features. Spoiler Indominus Rex by Alexey Tikhvinsky, on Flickr In the same 2016, in a New Year eve, I made another modification of the ACT truck. Indominus-2 was created specifically to participate in the winter truck trail competition in Moscow. Spoiler No differentials, reduced weight (3.5 kilograms) with the same dimensions. Design was primitive, while preserving the common features of the original "front end". No serious ambition in the construction of this truck, it was initially clear that with its dimensions, it will not pass the road for off-road trucks. As a result, of course, the distance was overcome, but at the cost of one repair and loss of drive on three wheels out of eight (actually twelve, the two rear axles were with twin wheels) Spoiler Indominus MKII by Alexey Tikhvinsky, on Flickr But a large number of positive emotions and feedback pushed me to an idea that this truck has not been exhausted yet. There were several attempts to build modifications of the same airfield truck in different versions, which ended, however, at the stage of creating the chassis (I wanted to do something fundamentally more light and durable). Later, I was distracted by building the truck with a crane from, again, @Lucio Switch Spoiler This truck, being assembled completely in the original version, absorbed almost all my electrics, the technic frames and, in general, almost all the parts (17 motors, three battery packs, 13 meters of pneumohoses, 16 pneumatic cylinders and 131 technic panels). The idea of building another truck on the same scale from the remaining assortment of parts seemed simply insane. And at the beginning of 2018 I found a solution to two problems at once. I figured out how to build both an original and not too expensive in parts truck, which at the same time would inherit design and performance from its two predecessors. Why build the next four-axle monster, when the 4x4 format for trucks is still looks pretty? In addition, there was an opportunity to test my strength in terms of creating a MOC, and not modification. Lego Indominus Mk3 by Alexey Tikhvinsky, on Flickr I left only some recognizable elements from the original truck, which allowed to identify it as Indominus-3: сontours of the cabin, individual elements of the body kit, doors. The functional was done with an eye to the fact that this truck will participate in the February truck trial in Moscow (by the way, riding at -15C degrees turned out to be very "fun", even filming was not possible, everything was frozen, including phones and cameras). But, despite the "competitive" orientation, the equipment turned out to be more like the first version of Indominus: limited slip differentials (three pieces: front, rear and center), chains on wheels (homemade, from the jewelry chain), complex exterior and interior (with Duplo penguins!) Lego Indominus Mk3 by Alexey Tikhvinsky, on Flickr In additional: old pneumatic shock absorbers (very soft and long-stroke), anti-roll bar on both axles, portal gear reduction in pair to wheel planetary gear reduction. I used: 2х Buwizz v2, 4x RC buggy motor (5292), 1x Servo motor, 4x extension wire and Android app made by @imurvai to control this truck with gamepad (works very well and smooth, by the way) Lego Indominus Mk3 by Alexey Tikhvinsky, on Flickr In the end, in my opinion, this truck turned out quite bright and sturdy, and even with 4.5 kilograms weight can handle some offroad in the conditions of russian winter Lego Indominus Mk3 by Alexey Tikhvinsky, on Flickr I hope you liked this orange buddy as much as I do If someone is interested, I'll try to make a detailed review of technical features (with schematics and colorful pictures, yes ), video and some photos of the "nude" chassis. In conclusion, I want to thank @Shurik for great photos and @Limga for his endless patience and support throughout my entire AFOL path! Thank you all for attention! Update: I found a photo from the competition. One of the participants struggled to help me with a loose climb up the hill Update #2: Just filmed a little adventure in snow https://youtu.be/oVwOIyrj6wQ Update #3: Added a video with summer offroad https://youtu.be/CXFRc0i4dWg Update #4: Fun crawling video https://youtu.be/fusAL80vCZI Edited August 15, 2018 by SilenWin Video added Share this post Link to post Share on other sites
rm8 Posted March 19, 2018 Very detailed presentation with history of creating and upgrading from Lucio's inspired truck to Trial winner Still can't believe such huge construction can handle truck trial heavy transmission load. Share this post Link to post Share on other sites
Aventador2004 Posted March 19, 2018 A well built extreme vehicle. The trial truckers better look out. Be sure to check the name, it got killed in the movie. Share this post Link to post Share on other sites
braker23 Posted March 19, 2018 Wow! I just love the looks of this beast. Also the motorization is insane, but I have my doubts about performance, it's too heavy, even for 4 buggy motors. Cannot wait to see the video, so you can prove me wrong Share this post Link to post Share on other sites
Shurik Posted March 19, 2018 AAbsolutely massive and terrifying piece of LEGO Technic! Was a pleasure capturing it for you, @SilenWin! Share this post Link to post Share on other sites
letsbuild Posted March 19, 2018 Very good post, you don't often get many like that. I saw your other two trucks, and I was blow away by them. Good job! Share this post Link to post Share on other sites
SilenWin Posted March 20, 2018 (edited) Thank you for kind words, guys! 23 hours ago, rm8 said: Still can't believe such huge construction can handle truck trial heavy transmission load. 21 hours ago, braker23 said: Also the motorization is insane, but I have my doubts about performance, it's too heavy, even for 4 buggy motors. Cannot wait to see the video, so you can prove me wrong I hope that some offroad tests, which I want to include in the video-review, will show you the power of dark side how much torque can lego gears and CV joints handle 22 hours ago, Aventador2004 said: Be sure to check the name, it got killed in the movie. I. Rex from movie will stay in my heart (like all my previous lego trucks). Oh, sentimentality Edited March 20, 2018 by SilenWin Share this post Link to post Share on other sites
Seasider Posted March 20, 2018 Love the look of the Mk3 Share this post Link to post Share on other sites
Lucio Switch Posted March 20, 2018 Sorry if I've distracted you too much! It looks to me like an amphibious vehicle...anyway great job! Share this post Link to post Share on other sites
SilenWin Posted March 21, 2018 @Permo, @Seasider thank you! 17 hours ago, Lucio Switch said: Sorry if I've distracted you too much! It looks to me like an amphibious vehicle...anyway great job! @Lucio Switch oh, I have to say that I really like such distracton Can't wait to see something new from you! Such a pity that this "amphibia" can swim only in vertical direction and in one way only Share this post Link to post Share on other sites
DugaldIC Posted March 22, 2018 This looks like quite the off road beast! I don't normally agree with third party options but those snow chains look awesome and you couldn't ask for a better driver Share this post Link to post Share on other sites
SilenWin Posted March 26, 2018 On 22.03.2018 at 5:05 AM, DugaldIC said: This looks like quite the off road beast! I don't normally agree with third party options but those snow chains look awesome and you couldn't ask for a better driver @DugaldIC Thank you so much! P.S. More penguins on video! And some offroad fun on ice and snow! Share this post Link to post Share on other sites
Lucio Switch Posted March 27, 2018 Did you know? https://thelegocarblog.com/2018/03/23/orange-crush-4/ Share this post Link to post Share on other sites
SilenWin Posted March 27, 2018 1 hour ago, Lucio Switch said: Did you know? https://thelegocarblog.com/2018/03/23/orange-crush-4/ @Lucio Switch yeah, that's great! BTW, do you like performance of two BuWizzes on video? Share this post Link to post Share on other sites
SilenWin Posted June 11, 2018 Sorry for topic bump, but I had just a great summer day in the open air and shoot little video with country offroad Hope you like it! Share this post Link to post Share on other sites
SilenWin Posted August 15, 2018 And another small update with fun video. Even some easy obstacles can be a big problem when you have 3 open differentials and almost 5 kilograms weight Share this post Link to post Share on other sites
KD123 Posted August 17, 2018 Nice driving! Appreciate the effort spent making such an entertaining video. Share this post Link to post Share on other sites
Magical Duck Posted August 17, 2018 That is a beautiful MOC! Engine at the front reminds me of @Sariel's Tatra Kolos. Are those third party tires as well? Share this post Link to post Share on other sites
SilenWin Posted August 17, 2018 5 hours ago, KD123 said: Nice driving! Appreciate the effort spent making such an entertaining video. 4 hours ago, Magical Duck said: That is a beautiful MOC! Engine at the front reminds me of @Sariel's Tatra Kolos. Are those third party tires as well? Thanks! Yep, there are 3rd party tires, you can find them on Ebay or some chinese online-market. I bought 2 packs (8 wheels) for about 15$ Also this topic is just like El Dorado Share this post Link to post Share on other sites
SilenWin Posted September 19, 2019 Sorry for a little bump =) Finally, I managed to say goodbye to probably the most long-living model on my shelf and I got the opportunity to share photos of the insides. Frame with axles: Spoiler Side view View from above Bottom view (without axles) Front view Back view In general, with the exception of a dozen pulled pins and axles - the frame in the photos is completely self-sufficient and can be completed with any bodywork refinements. Also, it can be considered modular, as it is quite simply divided into 5 parts: the front and rear axles, the middle part with motors and a center differential and two halves of the frame - front and rear. The front axle has undergone some changes: instead of a servo motor, the M-motor with a worm gear +20t gear for steering, the portal gears were slightly changed - now instead of breaking the CV joints on the front axle, 12t and 20t gears just started to crunch (they did not get any sufficient damage after all tests) More photos of the front axle: Spoiler From above From below Steering with M-Motor Rear part Front view Rear axle: Spoiler From above The limited slip differential (the white clutch gear rotates with the differential, being attached to one of the axle shafts, thus "braking" it, ensuring continued movement in the case of a "hanging" wheel or slipping) From below Rear view Front view Motors and central differential: Spoiler On each side, two motors are attached to the drive of the central differential (LSD just like the other two in the axles) Central unit without motors (dark gray axis 5.5 - input, red connectors – output) The central unit itself is symmetrical, there are two gears rotating differential from both sides for better load distribution and correct operation of the limited slip differential The back of the frame: Spoiler On the left you can see the gearbox, “lowering” the torque from the central unit passing down from the upper frame part Dark gray lever and rod near the shock absorber: anti-roll bar, necessary with a large body weight in order to compensate the torque twist, when the whole body inclines due to the rotation of the entire transmission in one direction Bottom view The front part of the frame (winch mechanism was added, proved to be extremely durable and suitable for the evacuation of even heavy models on the truck trial events: two L-motors, worm gear + 24t gear): Spoiler On the right - the gearbox leading down to the front axle and also up to the fake inline 6 cylinder engine Winch in the depths of the frame Bottom view In general, the truck showed its best in terms of endurance, strength and driving pleasure, so I think I will definitely return to such a heavy vehicles, especially keeping in mind all this new details from 42099 set =Р Hope you like this beast as much as I am! Many thanks to everyone who supported me while building and modding this truck and a helped with advice or comments! Share this post Link to post Share on other sites
