Scratch build Tiger 2 Part 1

[minimivic]

This is not model making. It is miniature engineering of the highest order. Apart from saying that, I am lost for words.

+1 on this just Wow

[43rdRecceReg]

What we get here, Walter, is an astonishing visual digest..a summary ..of all the work (and research, of course) you've put in to create this metal miracle. I have some background in engineering (lathes, milling machines, forges etc.,) from school days, where I spent a whole school term making an ultra simple steam engine out of brass (four moving parts inc. the flywheel) . My question is then, just how many hours have you put into creating these utterly jaw dropping bits?

Also, I'd love to know, and others will doubtless be curious too, about the places where you sourced some of the other specialised parts you didn't make.. I for one, would love to have some of those parts on my two KTs. Could you post a few links, please? Cheers! Christian Ludwig has great parts on offer, but yours, well... that's another universe.

[walter]

What we get here, Walter, is an astonishing visual digest..a summary ..of all the work (and research, of course) you've put in to create this metal miracle. I have some background in engineering (lathes, milling machines, forges etc.,) from school days, where I spent a whole school term making an ultra simple steam engine out of brass (four moving parts inc. the flywheel) . My question is then, just how many hours have you put into creating these utterly jaw dropping bits?

Also, I'd love to know, and others will doubtless be curious too, about the places where you sourced some of the other specialised parts you didn't make.. I for one, would love to have some of those parts on my two KTs. Could you post a few links, please? Cheers! Christian Ludwig has great parts on offer, but yours, well... that's another universe.

Here are the parts that I sourced on the internet:
Fire extinguisher used only the upper part.
Headlight only the upper part.
All u-bolts
Engine exhaust only the outer armor casing
Two tow cables
Tracks and road wheels.
Gear boxes and all the electronics.
And that is all the rest is all hand made.
I did not do any re surge just relied totally on the 1/35 scale plastic kit. Later when I did to my horror I had to redo many parts. The hole project took nearly two years.
Walter

[Kostyanchik]

The work deserves admiration and great respect for its creator

Why did you apply the gearboxes 5:1? Because they have weak motors and a small gear ratio of 46:1. Apparently the model turns out to be heavy. Does she have enough torque? How does it turn?
Why you did not choose 4:1 gearboxes, they have a large gear ratio of 89:1 + that allow you to install powerful motors (for example, speed 480).

[walter]

The work deserves admiration and great respect for its creator

Why did you apply the gearboxes 5:1? Because they have weak motors and a small gear ratio of 46:1. Apparently the model turns out to be heavy. Does she have enough torque? How does it turn?
Why you did not choose 4:1 gearboxes, they have a large gear ratio of 89:1 + that allow you to install powerful motors (for example, speed 480).

You making a good point.
I started with 3:1 gear boxes but had trouble controlling the tank at very low speeds.
I looked at 4:1 gear boxes and found I could not fit them in. Having scale thickness and torsion bars limits the space I have available.
So when I heard of the Taigen 5:1 gear boxes and their very low height, all my problems seem to be solved.
I had to make a compromise between low power and installation.
So far the gear boxes have surprisingly good torque and handling the 15Kilos very well.
My inside with is just 119mm wide and puts a limit on the size of the motors I can use.
Cheers Walter

[Kostyanchik]

Powerful and compact motors MIG speed 400.
They have a rotor with five magnets. These motors have a good torque.

[walter]

Thank you so much I will have a look at those MIG 400 motors.

[Kostyanchik]

Powerful and compact motors MIG speed 400.
They have a rotor with five magnets. These motors have a good torque.

Five pole motors are more controllable at low speeds than three, and give better torque at low speeds, that's why railway modellers first used them.

So, do these MIG speed 400 motors have five magnets around the case, or five poles around the armature? I ask because it's usual to have an even number of magnets, with an odd number of poles on the armature.

Mick.

the exact number of magnets on the inner walls I can not say. I did not disassemble these engines. I counted the number of winding magnets on the rotor. We have a tank and a friend in the club JS-3, it has a long base. The tank had problems with the movement in tank battles with a small number of lives. These motors can eliminate the problem of insufficient maneuverability.

[wibblywobbly]

Walter, you are an engineer par excellence, your work is stunning, will follow this with interest.

[walter]

I investigated MIG 400 motors if I could fit them into my tank, but no luck.
They are each 3mm to long.
Even if I could mount the gear boxes on the floor plate, get rid of the gear box cradles and push them right onto the side walls I still have a overall shortage of about 3mm.
Just does not work.
I thing there is a German company that makes different gear boxes that would be ideal, but just to costly.