Juckenburg Nashorn

AlwynTurner · Post by **AlwynTurner** » Mon Mar 27, 2017 8:15 am

Hi I see what you mean about the floor treadplate, the Nashorn had separate panels in the floor that could be lifted and it wouldn't have taken much to have cast that in, shame. Will the upper side panels fit or are you having to make new ones of those?
Alwyn

Tiggr · Post by **Tiggr** » Mon Mar 27, 2017 8:55 am

Crikey Louis. I can only admire the lengths that you and other modellers go to in this Tank Community.

lmcq11 · Post by **lmcq11** » Tue Mar 28, 2017 12:13 am

Hi,

Today, I did the gun rotation. It is a very simple system using the HL gun rotation unit coming with the panzer IV. It took maybe 1 hour to build. Ok, it is not an engineering marvel but it works...

First, the height of the resin part that is used as the base for the gun was reduced to account for the fact that I raised the cradle to be more realistic instead of the deeper hole it previously was. I will adjust it from the top again once the gun is built and I know the total height of everything together.

Then I used a Traxxas 3955 plastic gear wheel that I connected to the base using 4 plastic rods of different sizes put together to form an empty shaft of the size needed to fit the gear central hole. The arc of the gear was much reduced in order to limit the gun traverse and to make it fit under the base panels. I will put some stoppers at the 2 ends once I know how far the gun can turn. The shaft is empty because I am planning to use a pushrod through it to create gun elevation. This is coming from my days as an RC aviation builder. Pushrods are used for aileron control. In this case, it will connect somewhere under the gun and nothing of it should show. I will wait for the gun to be built before I can design it. The pushrod will allow me to use whatever space is still available in the hull and I will try to reuse the HL PZ IV elevation gears, if possible. There is not much room left available under the hood.

My aviation days stopped when my beautiful FW-190 that I spent a winter building could not manage to take off. Or maybe, I simply did not want it to because I was risking a crash. My FW-190 and my Stuka were a great pleasure to build. There were no cheap ARF back then. But it takes so much room once they are done. I also felt uncomfortable around gas engines, the noise and a propeller that can cut a finger at the slightest mistake. I prefer to have 2 tracks on the ground, and drive carefully...

Regards
Louis

lmcq11 · Post by **lmcq11** » Tue Mar 28, 2017 12:17 am

AlwynTurner wrote:Hi I see what you mean about the floor treadplate, the Nashorn had separate panels in the floor that could be lifted and it wouldn't have taken much to have cast that in, shame. Will the upper side panels fit or are you having to make new ones of those?
Alwyn

Yes Alwyn, the side panels seems ok. They have air bubbles and are warped but I am still currently planning on using them. Otherwise, this build will soon stop to be a Juckenburg kit.

c.rainford73 · Post by **c.rainford73** » Tue Mar 28, 2017 12:25 am

I like the way you setup the traverse for the gun

very happy to see your progress. Can't wait to see the gun assembly.

AlwynTurner · Post by **AlwynTurner** » Tue Mar 28, 2017 8:27 am

Hi Louis, I like the gun slew solution, it's simple and ingenious and uses parts available from the donor tank. It also sits nicely under the front glacis which is dead space just behind the gearboxes.

Looking great.

Following along with great interest.

Alwyn

lmcq11 · Post by **lmcq11** » Thu Mar 30, 2017 3:12 am

Hi,

Here, the basic components of the floor were redone in plasticard and put in place, shown before sanding and quality assurance. I reuse 2 bits of resin taken from a Juckenburg floor part, inverted and re-adjusted, just for the form... I mostly used the Aberdeen Nashorn pictures available on Prime Portal as main reference. There are many angles to worry about for the main section going down, the rest is strait forward. Next task is to fine tune and detail that whole area as per specs before installing the side panels. There is a lot to do.

You can see that gun traverse is done without disturbing the inside of the model. The plan is to install a flexible pushrod through the central hole for gun elevation. At least, that's the plan. It will not be given recoil.

The kit glacis is now in place, that part is not bad. After a preliminary cleanup, the air vents were attached to the side panels. I added a couple of close up pictures of them so that you can judge the quality of the Juckenburg resit kit parts for yourself.

A dry fitting of the side panels told me that installing them will be a difficult task.

Regards,

Louis

c.rainford73 · Post by **c.rainford73** » Thu Mar 30, 2017 3:33 am

Louis you have made quite a bit of progress. The front panel looks very good. The side vents should come along with some putty and sanding. I'm a bit taken back by all the air holes on the casting. Is this one of his earlier kits or maybe something produced near his retirement?

That being said I'm sure you will work through it.

What concerns do you have about the fitment of the side panels?

Are they warped or out of shape? I know you mentioned some issues with the parts in the kit. I did see some air holes in them near the vents. Could you design these out of plastic card? You have a good skill with the stuff

maybe something similar to Mr Alwyn's kit design

Do you have any pictures of the gun assembly? I'm very curious to see its design.

Carl

lmcq11 · Post by **lmcq11** » Thu Mar 30, 2017 12:40 pm

Hi Carl,

The front/side panels and mud guard are 3 parts that must join together perfectly as shown on picture. The mud guard will be the issue as the tread plate stops at a specific location and the bottom of the front panel must join exactly at that point. Dry fitting seems to show the tread plate stops like 5 mm ahead of it when the mud guard is at the right location in the front. I will likely have to sand the tread plate off and replace it so that it joins perfectly with the front panel. In any cases, Juckenburg useda large double diamond tread plate type. I do not like it, I think it should have a much smaller single diamond type.

Your question about the gun finally led me to inspect the gun parts. Without having done any accuracy checks (dimension, details...), I must say that at first sight, I am really impressed. There is no or limited warping, and no air bubbles on these. The tip to middle barrel section actually screw and unscrew from the main section, wow, I have never seen such precision in resin casting. And it includes a gun sight, something many conversion kit makers ignore. But, its the accuracy that will make me happy or not, I'll check that soon.

Regards,
Louis