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LEGO models my own creation MOCpages toys shop ZiS 22M halftracksLarge scale vehicles
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ZiS 22M halftracks
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About this creation
Last MOD of my ZiS 5 truck:
1:11 scale
Features increased traction, new axle with turntables as joint points, and excellent suspension,

Production of the ZiS-22 lasted from 1938 until 1940 resulting in only 200 samples built of which a small number was used during the Russo-Finish conflict of 1939/40.

(photo from 05m6.de, used with permission)

LEGO Model:

Made on ZiS 5 chassis, all the vital components are the same.

Steering and suspension is the same on front axle.
Drive is different, it has faster output from XL motor, because tracks have internal reduction.

For detailed description of the chassis, suspension, cabin and cargo bed and its components, please see my ZiS 5 model.

Back axle:

Back axle has differential, and reinforces all around.
Turntables are used as a connection points to the trucks for three reasons:
1. To release drive axles of any presuure from weight of the truck
2. To have strong 4-point connection of axle and single caterpillar track
3. To allow caterpillar tracks to have infinite rotation (needed for rolling over obstacles)

This axle is extremely strong with turntables, weak point is differential, which can break the central 12 bevel gear under heavy pressure.

It took me few days for axle to make, test and implement into the chassis.
It can be removed and changed with regular axle for wheels in about 30 seconds.

Caterpillar tracks:

Tracks are made to be as real as possible.
In order to achieve perfect realistic look, they have many parts, and single track weights 370 gr.!

These red covers are, like on real one, protection of chain drive system. Yes, real halftrack has indeed chain drive, which sometimes broke and caused problems.

Final setup weight about a kilogram:


Cargo bed:

For this version I wanted to make canvas bars, so I did it with axle and connectors and a lots of axle joiners.

The rest of the cargo bed is the same, with small modifications to be able to connect with canvas bars.

Variations:

From variations, I choose to make cargo bed version, and tractor version.


Playability:
Model was tested outdoors and it performed ok, without breaking gears.
The truck weights nearly 3.5 kg,

For best results, it should be kept and used indoors, on flat surface or on carpet. Then it can easily climb over sleepers, carpets or small obstacles.


Instructions:
If there is enough interest, step by step paid instructions will be completed
I am still giving away free .ldr files as a rough sketch.


Video:
(2.5 mins)



Please subscribe :)



Comments

 I made it 
  April 4, 2014
Quoting Tommy S. There would be a mechanism that would unlock the diffrential prior to turning.
In that case, it would be ok. But I think it would complicate the vehicle too much. Build as simple as possible.
  April 4, 2014
There would be a mechanism that would unlock the diffrential prior to turning.
  April 4, 2014
I mean one track slipping.
 I made it 
  April 4, 2014
Quoting Tommy S. Good build, love the realism. I'm thinking about building a sdkfz 9 FAMO halftrack and would it be a good idea to have locking mechanism on the differential to prevent differential slip when driving ? It will also have a method of braking one track when steering.
Hi, Not sure what you mean with "differential slip". Locking differential on these vehicles are not a good idea (maybe its ok if you have good grip on front tires and really non-gripping tracks). On the vehicle you chose to build (i consider it myself) definitely don't lock the diffs, because it will act as a tank. Also, you will have to incorporate braking of the tracks in order to steer, given such large tracks.
 I like it 
  April 3, 2014
Good build, love the realism. I'm thinking about building a sdkfz 9 FAMO halftrack and would it be a good idea to have locking mechanism on the differential to prevent differential slip when driving ? It will also have a method of braking one track when steering.
 I like it 
  March 27, 2014
Another thoroughly engineered marvel!
 I like it 
  March 26, 2014
Impressive machine! You used clever techniques. Very detailed and clean MOC. Good work!
 I like it 
  March 25, 2014
Nice treads! The whole evolution of this truck is very neat to watch. I don't think I've ever seen any car or truck built so thoroughly before.
 I like it 
  March 25, 2014
Cool halftrack version, excellent execution.
 I like it 
  March 25, 2014
a nice mod of an already well made truck!
 I like it 
  March 25, 2014
Wow! This is some really nice LEGO engineering. The tilting bogie mechanism and the authentic chain drive are really nice features. The rest of the halftrack looks great, too.
 I like it 
  March 25, 2014
Great work! Very cool video! :)
 
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LEGO models my own creation MOCpages toys shop ZiS 22M halftracksLarge scale vehicles


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