B1 bis

This section is for builds that are not strictly Tamiya or Heng Long. For instance, replacing the electronics from a WSN or Matorro, or even a scratch-build.

Postby Exzitus » Thu Jun 11, 2020 8:25 pm

I hope I'm not boring anyone here with frequent topics :)

I want to share the process of creating another model - B1 bis.

In the beginning, I will post the work that has already been done. I will spread it by analogy with the Object.

19.11.2019, 18:19

The project started around February.

The car is interesting for its relatively small size for a heavy tank and a kind of chassis. The original had an interesting electric turning system, which allowed you to accurately point the course gun.

The model will have:
- printed case with set rivets and bolts;
- simplified suspension system;
- spring tensioner of the track on the sloth;
- 5-speed transmission with a single engine forward/backward and a separate motor for turns (similar to the principle of working with Tamiya or DKLM).

Probably the most interesting is the transmission. The design of the tank itself stood for a long time, although two samples of the body were printed in mid-summer, precisely because of the transmission.
A 5-speed gearbox should ideally also be automatic, but it may not be.

To be continued...
Last edited by Exzitus on Thu Jun 11, 2020 8:32 pm, edited 1 time in total.

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Postby Exzitus » Thu Jun 11, 2020 8:31 pm

30.11.2019, 01:33

The body has been printed for a long time, the chassis is also almost completely.

I spent a long time working on the gearbox. There were created 5 projects that did not fit the characteristics yet.

The tower is still in operation, it will be similar to that of Ilgar on Somua, only a lump. the turret is rounded.
Bulletproof bolts I hope will be printed on photopolymers by Vyacheslav Loginov

To be continued...
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Postby Exzitus » Thu Jun 11, 2020 8:39 pm

19.05.2020, 23:17

After a long break, work resumed.

The checkpoint is working as planned. However, for comfortable control, you need to configure the Board, since the control is like a car (instead of the rotation servos, a reverse speed controller is put). We still need to develop a speed control Board. This is left for later - the Board will run in parallel on the truck.

The suspension is a bit stiff. With a full load as it will roll - I will think how to improve.

A weapon without recoil. The place is actually there, but I don't see the point in such a small trunk.

The most recent step will be the installation of bolts... about a thousand of them... I hope you have enough patience.
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Postby Exzitus » Thu Jun 11, 2020 8:41 pm

Then I will post up-to-date information on creating the model.

P. S. bullet-proof rivets and bolts are all installed already. I work inside the model. I also forgot about some elements outside.

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Postby c.rainford73 » Fri Jun 12, 2020 2:16 am

Most excellent build! :wave:
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Postby lmcq11 » Fri Jun 12, 2020 3:06 am

Super engineering. Awesome tank :thumbup:
Louis

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Postby midlife306 » Fri Jun 12, 2020 8:48 am

Fantastic


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Postby Exzitus » Fri Jun 12, 2020 6:34 pm

The works are moving. There is not enough time catastrophically((

Arranged the internal nodes. Turning the model on/off, volume, and charging Jack will be located behind the side hatch.

I will show you the gearbox separately. Dimensions in mm-length*width*height 111*84*52
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Postby Jimster » Fri Jun 12, 2020 6:52 pm

Very cool build. I see you’re using the very best tank control board for excellent sound and motor control.

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Postby Exzitus » Fri Jun 12, 2020 7:15 pm

Jimster wrote:Very cool build. I see you’re using the very best tank control board for excellent sound and motor control.


Yes, I use this Board as it is available. But most likely, its use in this kind of project is not justified, since the transmission is similar to the original one and when installing an intermediate control module, it will be able to switch gears mechanically with audio accompaniment.

Ideally, the transmission should be automatic. I wrote an approximate control logic for the intermediate control module. We will try to organize automatism with our programmer friends.

As a result, even Clark will be quite realistic to move the entire tank.

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Postby tomhugill » Fri Jun 12, 2020 9:51 pm

What an incredible project! I love the transmission and look forward to seeing more


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Postby xhelfix » Fri Jun 19, 2020 1:38 pm

Hey,

fantastik report, that look total fine till jet. :thumbup:

Greetz and thanks for showing, Andy
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Postby Hoover » Mon Jun 29, 2020 6:25 pm

Fantastic, keep us updated
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Postby Will01Capri » Mon Jun 29, 2020 10:53 pm

Very nice piece of design work. Watching with interest
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Postby MITCH » Tue Jun 30, 2020 5:59 am

Is it a gearbox with differentials?
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Postby Exzitus » Wed Jul 01, 2020 12:37 pm

MITCH wrote:Is it a gearbox with differentials?

Yes, the gearbox uses a differential for turning, which is implemented on planetary groups of gears.

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Postby MITCH » Wed Jul 01, 2020 8:14 pm

Exzitus wrote:
MITCH wrote:Is it a gearbox with differentials?

Yes, the gearbox uses a differential for turning, which is implemented on planetary groups of gears.

Very good job! Do you have a video?
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Postby Exzitus » Wed Jul 01, 2020 8:58 pm

MITCH wrote: Very good job! Do you have a video?


Tests of the work were carried out in a semi-disassembled state. Equipment from the r/c car was used.

I didn't make a video. I test the transmission more fully on a truck model.

I will make a video when the model is in decent condition. It will be a little later. I am currently working on a cast KV-1 tower.

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