Sd.Kfz. 251 Ausf.D by Warprints - 1/16 scale

[tankme]

Very cool. You should be proud of that. Now I just feel bad that you have to produce the kits and sell them yourself because of people stealing your designs.

[50koruny]

Thank you.
Yes. I'm happy with it and proud - it's my most accurate and detailed model yet.
Thanks to the fact that I'm constantly improving my 3D modelling skills, but mainly because i had really good reference material this time.
I found a vehicle restorer that has a 3D scan and that's a really great combination.
All the parts were either scanned or (the simpler ones) measured.

As for STL - unfortunately...
I don't work for a year on a model for the sake of someone else selling it on eBay.
Anyway, this model is not very suitable for STL sales.
Many of the chassis parts need to be printed from nylon.
Some can only be made from the most durable resin.
By its nature, it's not something that every 3D printer owner could print.
And you need both an FDM and a resin printer...

On the other hand, not offering STL files allowed me to do it more detailed and differently than previous models.
I've been printing since 2016 but still only managed to print the dashboard on the fifth try (5 different designs/printing methods).

Finally, it's almost done.
In 1/6 scale it will look even better.
There will be a lot more moving parts.
I'm about to start making a large scale prototype.
I'm looking forward to it.

[Ecam]

Tremendous details in that cab.

[Herr Dr. Professor]

50koruny: about a month ago, you posted that you "need something that can use servo (for the front wheels) and motors (for the tracks) at the same time...proportional steering that can handle braking one track when turning." What did you use? It seems in the video to work well.

[50koruny]

Tremendous details in that cab.

Thank you.I added that Tetra fire extinguishers and some boxes for the radio.
That will be all for the prototype.
I'll take some more pictures.
Today i got a 3D scans of some other accessories for the radio.
I will add those to the next units produced.

I dont use the scans directly.I always redraw the whole thing to make it nice.
A small sample of the newest 3D scan:

speaker.jpg (65.44 KiB) Viewed 2107 times

50koruny: about a month ago, you posted that you "need something that can use servo (for the front wheels) and motors (for the tracks) at the same time...proportional steering that can handle braking one track when turning." What did you use? It seems in the video to work well.

I developed my own solution based on a universal board with a 328p chip.
I just had to write the software and add ESCs and a receiver.
It is a custom made solution for this model and will be supplied with all models produced.
I still have to add the sound module.

[Herr Dr. Professor]

"I developed my own solution based on a universal board with a 328p chip." Oh, unh, you are, indeed, wa-a-a-y beyond my ability.

[50koruny]

I dont know.Its just some Arduino programming...
As I say - I did not have designed that board or modified it in any other way.
I just found something that can be used and has small dimensions and lots of pins.
Its basically a derivative of the Arduino Nano.
I just created a sketch for the Arduino.
There were 30 versions of that software before I got to a good result.
Also, I am not a good programmer, so someone might be able to make it to 10 (or less) versions.

By the way - my arduino sketch can work with 6 channels right now.
It can turn off the engine, lights and work with the smoke generator (proportional).
This can be extended with various other features if needed.

Anyway, I recently found something that is small, has an Atmega2560 chip and maybe it can supply enough voltage.
I will see.I will give it a try and if it does well, I might end up using OpenPanzer firmware instead of my own Arduino sketch.
But I am not sure if it will handle cornering that well.
We will see.
I am still developing something new and trying to improve even the older stuff...

[Raminator]

Fantastic work again, Tomáš! I love all the little moving parts for the cabin visors and door lock mechanism. I really think we're getting to the point where 3D printed parts are superior to traditional injection-moulded styrene kits, especially with all of the different materials available to print with.

[50koruny]

Fantastic work again, Tomáš! I love all the little moving parts for the cabin visors and door lock mechanism. I really think we're getting to the point where 3D printed parts are superior to traditional injection-moulded styrene kits, especially with all of the different materials available to print with.

Thank you very much.
It is definitely more durable and more detailed than styrene.
But it needs a varnish with a UV filter to protect it from sunlight.
Otherwise it will overcure over time (and it will be fragile).
Everything has advantages and disadvantages.

By the way - that door locking mechanism is fully functional (also from the outside).
I will make a video of it later.

Today i was outdoors for a while, playing around a bit.

phpBB [video]

[Herr Dr. Professor]

Raminator notes that "3D printed parts are [now] superior to traditional injection-moulded styrene kits." Even though two years ago, I made a careful and difficult decision not to start into 3D printing, I wholeheartedly agree. And 50koruny here proves the point.