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Minenknacker - Pz. I Ausf F VK 18.01

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Minenknacker - Pz. I Ausf F VK 18.01

Old 08-09-2021, 11:26 PM
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lposter
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Default Minenknacker - Pz. I Ausf F VK 18.01

After having finished a couple of oversize tanks I decided I would like to do a smaller one and I have landed on the Pz I Ausf F.

This thread will contain progress.

Theres plenty of information on the Pz I Ausf F on the net soo I will keep it brief. The Minenknacker ("Mine Cracker") was a dead end developmentof the Pz I resulting from an apparent "need" for a heavy shellproof tank that would support breakthroughs of heavily fortified areas.

1939 saw the start of the project which would have big fat tracks and 80mm of armor in front, 50 mm in the side and was invulnerable to AT weapons of the period. It had wide tracks, torsion bar suspension and two MG 34s in the turret.

30 units were produced throughout 1942 even though the context the design was supposed to address had all but dissappeared (Maginot Line type activities).

As is usually the way, tanks that are badly designed or obsolete ended up in nefarious "police" type duties in partisan areas of the eastern front where the Ausf F did fairly well. A battalion of the tanks was supposed totake part in the invasion of Malta but that didnt work out in the end.

Its a nice tank as it loads of features that pop up in later designes (torsion bars, overlapping wheels, the vision block is very Tiger esque etc etc.).





My plan is to, as usual, make it from scratch as much as possible and from steel. Given the size, it will need a custom gearbox. Which may be a problem.

The wheels will be an issue too...... they have spokes and the two outer wheels have a weird cake tin scalloped hubcap type arrangement. Some compromises will have to be made I reckon. It will also be tough to fit a standard sized 7.4 volt battery in there as it is too long. I may have to seek an alternative battery type.

I got hold of a nice set of Tiger Transport tracks from Asiatam for a great price and they are just about the right width and appearance give or take a mm or two.

I started forming the hull last night and will hopefully keep things up to date more or less.

P


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Old 08-10-2021, 11:06 AM
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I like the variants of the light German tanks, they aren't often modeled in favor of the German Giant tanks. Pz I and Pz II have some really interesting variants. This is when I most feel the loss of Geisswerk- Martin would make tracks for stuff like this. At least for 1/10 and 1/6 scale...

I'll go out on a limb and assume 1/16 scale?

Jerry

Old 08-10-2021, 11:20 AM
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I'm afraid so.......its just simpler to get tracks and some hard to make bits.

Although it's a trade off with respect to space inside.

P
Old 08-11-2021, 04:31 AM
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Here are the first humble pictures of my knacker. Sorry that they are crude and not exciting but from little acorns......

2mm steel has been used to rough out the two sides. The front is still to be done...Im waiting for the gears cover which lets me determine the shape of the front walls.

Oddly enough, it seems the swingarms on either side swing in different directions. On the right, They swing forwards (counter clockwise) and on the left they swing the other way. So I have to start making those arms soon.

This tank cannot weigh more than 6 or 7 kilos so I am hoping standard motors suffice. If not....I am taking up another hobby!

P



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Old 08-11-2021, 02:19 PM
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Am following! I find this to be one of the most interesting of the German designs.
Old 08-16-2021, 07:23 AM
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I had to make a start on the running gear as I need it to be done before I start assemblingthe hull pieces.

This was a fairly simple. 3 parts. The first was the shaft that gies through the hull wall. This was 6mm silver steel. Lenths of 26 mm were cut and filed square. A 2 mm slot was cut in one end to a depth of 8mm. I cleaned this slot up with a file. This wuill hold the one end of the torsion spring. I will get back to this bit.

The next was the swing arm itself. These were cut from 4mm mild steel and two holes of 6mm were drilled in each one.



Then I rounded off the ends using the mini belt sander I have. I was not so concerned about this as they wont be visible.



Then I need a round bit that sits up against the hull. This was simply some slices of a 1 cm thick silver steel bar center drilled to 6mm.

These were then all silver soldered together...I may have been a bit heavy handed with the silver but it wont be visible.



The little hole in the forks performs two functions.

The hole is tapped both ends to M2. This will stop the forks splaying when under rotation against the spring.

In addition ... when the torsion bar hooked end is inserted, teh M2 bolts holds the torsion within the fork (not clamped by the forks, just held in).

Th eother end of the torsion bar will be held in a clamp. This allows for adjustment of the torsion bar.

Plus...and this is the bit I was focussed on ..... when the other end is clamped, the hook will pull against the bolt in the fork serving to keep the whole assemble firmly pulled against the hull and negating the need for shaft rings or whatever.

If it doesnt work ...I'll just use some circlips to hold the swing arm in place.

P
Old 08-31-2021, 08:49 AM
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Decided to take Tanques advice from another thread and have a go at making a mitre gearbox for this tank as making HL style ones to fit with biog enough motors was a real nightmare. Possible....but by the time they were done they took up a lot of valuable space.

I made the frame from crylic - because I had a block big enough and I dont have time for hacking at aluminium for weeks. The holes have brass bushings - could have been bearings but the smallest I could get for a 6mm shaft had a 13mm OD and accurately cutting such holes was beyond me. There is obviously a lot to be done...flats on teh shafts and the 8mm diameter end pieces on the shafts to enage with the sprockets.

To ensure the acrylic will stand up , the two outside arms of the box are flush with the hull walls and will be held to them with screws significantly toughening them up.

Th emotors are 100 rpm gearhead motors from ebay...if they aint enough, then it is possible to upgrade them in their entirety,

Next theing now is to finish the suspension system.

P




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Old 09-01-2021, 02:28 PM
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Wow, nice start!!!
Old 09-16-2021, 09:08 AM
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Just an update in case people think I gave up! I didnt!

All the work now is focussed on the broad outlines of the hull. Which is trouble as there are a lot of bits and a lot of holes. Which all need cutting and filing. But the rear deck is progressing nicely and the suspension system is finished and then I moved onto the top deck.

Which includes the much dreaded curved turret! Which is a thing I do not do as curves are really annoying and a bit difficult.

I just made the top and bottom of it and vrazed them together. Then I cut a strip of brass and after hundreds of attempts got it wrapped around the two pieces and soldered in. Not perfect but filler and patience will fill in teh gaps and dents.

There are inaccuracies....a recessed trunion is missing on the back. On purpose because there was no way that was going to easy. So its hasta la vista to that.

The next is the mantlet for the machine guns and the top bits of the turret which will both cover up a whole multitude of gaps, scratchs, dings, dents, divots and misalignments.

P





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Old 09-16-2021, 01:55 PM
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That is so Cool !!!
Old 09-18-2021, 07:49 AM
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Started on my mantlet today. Im using a piece of steel tubing with 3mm wall thickness that I split down the middle and lapped level. A 16 mm piece of aluminium half round forms the inside bit.

The machine gin mounts are 6mm silver steel bored out to 4 mm. I really have to even up the edges of teh cut slots in the tops of the shrouds. I chain drilled them out and they need filing. Next bit will the machine guns themslevs.

There are an awful lot of seams that need filling and sanding but I will get there eventually.

P



Old 09-18-2021, 08:41 AM
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Looks good.

I kinda like the drill bits. That's an awesome visual!
Old 09-18-2021, 08:46 AM
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Originally Posted by philipat View Post
Looks good.

I kinda like the drill bits. That's an awesome visual!

Sorry about that! Here it is with the guns temporarily installed!

P​​​​​​​


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Old 09-18-2021, 03:31 PM
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Great Project!
Old 10-02-2021, 12:25 AM
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I have been busy trying to flesh out the hull on this Pz I and while not a huge job at first glance there is an awful lot of smnall bits and pieces that need making.

The rear deck is coming along nicely and I hope to finish it off next week.

Then I will try and focus on the side walls and upper deck which need attention. I also had to remake my gearbox but I will get back to that.

Asd usual...needs filler/cleaning/sanding/painting.

P



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Old 10-02-2021, 01:21 PM
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Appreciate the update!
Old 10-04-2021, 02:30 PM
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Looks good so far, thanks for the update!!!

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