BTR-90

[Tatrovak]

I present to you my latest creation, it is a model of a wheeled infantry fighting vehicle, of Russian origin, BTR-90.
The BTR-90 was first publicly presented in 1994 and is the successor of the BTR family in terms of concept and internal layout, but it is larger, significantly better armored and armed, and it is the first BTR that can already be called an infantry fighting vehicle and not only about armored transporter, although the BTR designation would suggest so (BTR = BroneTransporteR = armoured transporter). Like its predecessors, it is fully amphibious, among the many improvements I will mention a function that has always fascinated me on the BTR-90, apart from the classic steering by turning the wheels of the front axles, the BTR-90 is capable of skid steering when the wheels on each side of the vehicle rotate at a different speed, even against itself, which allows the vehicle to turn on the spot, it is unique in this respect, and it matches the maneuverability of tracked IFVs, which has always been a disadvantage of wheeled vehicles, especially when fighting in urban areas. Unfortunately, although I am sorry, I was not able to equip my model with this function, maybe next time.
My model is powered by two Buwizz 2.0 which are located above the fourth axle, in front of them, between the third and fourth axle are two Buwizz RC motors which are used to drive the wheels and propellers. The drive of the propellers is detachable and is done through a toothed clutch which is controlled by one PF M motor, the breakwater tilting is controlled by another PF M motor, and these two are connected to one buwizz output and thus work simultaneously. When the breakwater is folded out, the drive of the propellers is switched on and the BTR is in cruise mode. Other functions: side door opening, turret rotation, cannon tilting, are each controlled by one PF M motor. The tilting of the grenade launcher is mechanically linked to the tilting of the cannon. Similar to my T-90A, there is also a driver's hatch, albeit manually, but remotely controlled, the controls are located on both sides of the body between the first and second axles.

 

Edited November 9, 2023 by Tatrovak

[Lego Tom]

Very cool build!

[Tatrovak]

Thank you

[Aurorasaurus]

im impressed. good job! especially on the doors, those work great

[Tatrovak]

Thank you too.

[Tatrovak]

I decided to build the BTR-90 again, the main difference compared to the previous version is that this version is two holes wider than the previous one, besides that, I only improved the details, the propeller drive and the landing doors on the sides of the hull are better solved. The turret is now in the Berezhok versions, which comes from the BMP-2M. And I tried to better document the capabilities of my BTR-90 in videos, since I neglected it in the first version.

 

 

[Alex Ilea]

Awesome build! It would look amazing during an expo. 

[Tatrovak]

Thank you very much.

[Lixander]

Looks just great!

I think you should go to a static modelling exposition, as you managed to capture most of the details ;))

[Tatrovak]

Thank you very much to you too, I paid attention to those details and I manage to gradually improve in this regard, but I definitely still have a lot to improve. As I was looking at the photos that I added here today, I noticed things that I had missed before and I will go to solve them.

[Paul B Technic]

Wow, that is an awesome build. I love the level of detail in it.

[Tatrovak]

Thank you very much

[icekusbe]

Amazing MOC, technically and aesthetically.

Speaking of the new version being two studs wider, I have a question on the earlier version: How did you manage to build a double wishbone suspension so narrow? Which U/CV joint did you use attached to the differentials, or did you attach the u-joint to the diff without a frame in between?

[damian_kane_iv]

Very detailed and impressively most of the exterior is still technic

[Tatrovak]

Thank you both, and Icekusbe, good observation, it is not possible to build a double fishbone axle in that width from original lego parts, I modified a 3L universal joint so that the axle could be narrower.

[Tatrovak]

I built my third version of the BTR-90 again with the Berezhok tower from the BMP 2M, later I will add photos and a description of the changes. For now, I am giving here at least this short demonstration of the driving characteristics.

 

 

[LEGO Train 12 Volts]

Simply wonderful!

[Tatrovak]

This is my current (fifth, in the previous video it is the third) version of the BTR-90. Although at first glance it is probably not very noticeable, there are several changes. I will start with the turret, which now has its own Buwizz 2.0 and it powers two PF M motors for driving the turret rotation and cannon elevation, and two CADA micromotors for rotation and elevation of the machine gun on the turret roof. The turret is therefore a separate unit that can work even when it is pulled out of the chassis. I chose this solution because I wanted to build a turret with a remotely controlled machine gun station on the turret roof, which required another buwizz, and if it were placed in the hull, it would be necessary to pull the cables for the motors through the entire chassis (because the place for the third buwizz would only be at the back behind the two that power the chassis), and there was no room for that in the chassis (since I always try to store the cables in the chassis itself so that they don't just lie around in the crew compartment) and this way it is more elegant and, above all, it allows the turret to be very easily dismantled, which is demonstrated in the second video.
There are also several changes to the chassis/body, first of all, which is the most important for me, I managed to increase the ground clearance by one hole, at the same time I reduced the height of the chassis by one hole from above, or better said I moved the interior floor one hole lower, which created more space for the turret and in the crew compartment. And now the doors for the landing gear each open separately, each door is controlled by one CADA micromotor. The propellers are no longer driven via a gear coupling from the main engines, but by a PF M motor.

 

Edited July 16 by Tatrovak

[Milan]

Beautiful and nostalgic machine.
And you just made it even better.

[Tatrovak]

This is the latest version of my BTR-90, this time I equipped the turret with a cannon drive, unfortunately it does not fire any projectiles, it only simulates the recoil when firing. The commander's turret is also motorized, but that is just a function in order to occupy all the channels of the buwizz that is in the turret. The turret rotation is provided by a PF M motor, the cannon elevation, firing from the cannon and the commander's turret rotation are provided by three CADA micromotors. I also improved the chassis a little, the most visible change is the lights and the rear part of the hull. Of the changes that can be seen, the one that is not significant at first glance is that I used the wheel configuration I use on my Tatra 813 (Fischer Technik 80 tires with black hot melt adhesive-bonded 43.2x18 LEGO wheels).

 

 

 

Edited Wednesday at 04:28 PM by Tatrovak

[gyenesvi]

What is that part used as the lower A-arm that holds the wheel hubs? Is it 3d printed?

[Tatrovak]

Yes, it is a 3D printed part designed by Horcikdesigns, for which I am very grateful, which I mention every time someone asks me about it, because that part is incredibly useful. But to be more precise, it is a combination of the aforementioned 3D printed part to which I also glued 3L litfarm superglue.

Edited Wednesday at 09:29 PM by Tatrovak