RC_BobM

Spinnetti,
That Hetzer turned out just excellent! Great job! I love the ring and pinion final drives. That is really cool with the real braking mechanism. Fantastic piece of engineering AND printing!

Your choice of scale in 1/12 was just the bee's knee's with FMS release of Jeep and Kubel to go with it.

PS I'd be happy to paint that for you!

Very cool work.

Best regards,
Bob

Crius

This project has been very impressive. As a man who owns a 1/6 hetzer that shoots 50 caliber paintballs I don't usually see tanks that I think are as impressive as mine, but this one definitely makes the grade. Excellent job. I'll be very interested to see how the 3D printed Parts hold up over time.

spinnetti

Thanks! I'd love 1/6th scale stuff, but impractical for me - Maybe after retirement and I have a shop again, I'll make my own metal ones in 1/6th scale. I have airplanes too, and most of them are 1/12th so this matches On an impulse I bought that 1/12th scale Kubelwagen off Amazon last week too - its tiny! Stug up next!

Bob, wish you were closer, I'd take you up on a paint job!

RC_BobM

spinnetti,
In 1/6 the "little" Hetzer hull is still 2.5 ft long! The whole tank would be 3ft long.

I think 1/12 is perfect, esp as more vehicles and figures come out. Stug will be fun to see!

My scratch built 1/6 M5 Stuart is mostly aluminum - its over 80lbs with batteries - so be careful what you wish for!

If you change your mind on the paint - I'll be here. LOL.
Bob

spinnetti

Thanks Bob, I'm going to take a break for a bit, then finish the last details then will ping you about a potential paint job

RC_BobM

I just came across this guys Youtube channel. He's a scratch builder of static models, but lots of great how to''s for printing and making parts in metal and plastics. He's building a 1/12 scale Stug III and has already built a Maus. Great stuff. This is a link to part 5 the hull of Stug. Enjoy.

Bob

spinnetti

Cool, thanks... A static build is very different than a working one but I'll watch the series!

ronnie42

Project Stug well what can i say. It has solved the problem of fragile parts when printing in resin, just use the printed part to make a mould. Will be following this masterclass in modelling . Just watched the MG 34 build , way above my skill level.

FLAMME 2

Did someone hello me to found the resin product to realized tires ?

FLAMME 2

Did someone help me to found the resin product to realized tires ?

spinnetti

You can use TPU with a FDM printer for the tires - that's What I did for my Hetzer.

I'm gearing up for the Stug III.... Anybody know what the real tire or wheel diameter was? I use those to scale the whole model.

Ex_Pat_Tanker

I use TPU filament for vehicle tires as well. I used to be able to get some 85A shore hardness material, which had more of a matt finish to it, but that company went out of buisness and now I'm stuck using the 95A shore hardness material from Sainsmart - much cheaper than the old stuff and prints much faster, but looks less attractive...
(before anyone in the US shouts 'Ninja flex' - their stuff is stupidly expensive over here!)

I do have some rubber UV resin from Amazon to experiment with in my Elegoo printers, but I just haven't had time this year to do anything with it.

In other news:
The Diamond T is now printed and painted, needs a little more touch up doing before I get on to the Decals, but the flash of the camera always makes the model look worse than it does to the naked eye...
The hood has suffered a little bit in the sun, might replace it with one from UV resin, or maybe a new PLA one with some more structure underneath it - this one wasn't as reinforced as it perhaps could have been, but certainly not too shabby for 2 days spent baking in the sun at a show.

tankme

I bought some Overture TPU to experiment with on my new printer, but haven't had a chance to print with it yet.

FLAMME 2

Thanks guys for the answer

Will01Capri

Designed a new transmission unit for scratchbuilt rc models and can be used in WPL/JJRC trucks etc






This is just the single motor unit design. Can modify it to use 3 width of belt depending on load requirement
It can be configured 1:1 0.8:1 or 1:0.8 and if required i could design with outher ratios if i modify the housing slightly

Can run 2s, 3s and 4s lipo for mad days.

The belt can be tensioned and can be setup using a mobile phone app to install as a set frequency

Also have a dual unit which allows 2 motors to be used in 4wd or awd conifguration depending on how the final driveshaft is setup.

Also working on a dual compact unit which features a wide belt and compact transfer housing.

Cant wait to get it on test on one of our trucks, tiny little belt drive unit, its only 40mm width, so we might be putting this into a small 1/25 scale truck for some hauling power

Shark27

Hey guys, you may want to check out this , It's firmness is adjustable by the temperature you print it at. Stefan has done most of the work for you to get things going with initial settings recommendations.

I purchased a couple of spools of Black to try and it does an excellent job printing tires. The finish is matte so they look like actual rubber tires.
While the price per spool is high, when you print you set the flow lower because less material is required because of the foaming action. In my test prints I have the flow set to 65% at 210 C which give me a fairly soft but firm tire. I have not pushed it to the max as I wanted to retain the tread details.
Stefan has a link where to buy the filament from Matterhackers.


I did experiment around with decreasing the sidewall thickness, to change the deformation point, as I recall I got it down to about 1.5mm thinner than that and the sidewalls would tear when trying to mount the tire to a rim. I also experimented printing the rim and the tire out of the filament and surprisingly it worked pretty well. I am not sure how well the rim would hold up on an R/C vehicle.

Even at the higher price you are using 35% less filament to print with so it is not as expensive as it initially seems.
The charts in the video seem to be accurate and are the settings I used to set up my printer.

BTW I did my printing on my CR-10S which has a Bowden setup and the filament was stiff enough to send it through the Capricorn Bowden tube I use, I never had a feed issue when printing with this filament, your mileage may vary if you are using economy grade Bowden tubing, which are generally not as slippery as the Capricorn tubing


WPL truck tires single rim rear backs

WPL truck tires single rim fronts

Kubelwagen tires

Kubelwagen tread pattern
The truck tires were designed to replace the stock balloon type tires on a couple of WPL trucks I have. The stock tires were way too fat to resemble a WWII vintage tire, the tread patterns were also too modern.
Here is a short of me squeezing the tires to show their compressability.

Will01Capri

Quick prototype drive unit, built & tested.
1:0.8 ratio compared to WPL metal transfer case, so its slightly slower, but the torque is a bit higher.

Can't wait to get this in something soon to prove its potential

I will be have different ratios in time to cover higher torque or higher speed variants and can customise with different belt widths to accomodate different load requirements

Honkeytonk

Lots of great work on this post

RC_BobM

Couple images of my 3D printed 1/6 Hetzer. Coming along nicely. Its from Tomas Fudor in CZ Republic. STL available on CULTS for purchase or from FB (Tomas Fudor - Warprints).
Its printed from ASA and PETG which is very strong and light. The detail is nice for a big model. I remade the drive train to be a bit more robust. Finished weight will be about 30lbs (~15 Kg)
So far fun model to build. If you do print this you need a BIG printer. I bought the pre-printed kit parts from Tomas.

3D file Jagdpanzer 38(t) Hetzer scale 1/6 - 3D printable RC tank model・3D printer model to download・Cults (cults3d.com)
warprints - Search Results | Facebook





Bob

RC_BobM

Small update on 3D printed 1/6 Hetzer from Warprints https://www.facebook.com/search/top?q=warprints

So far so good, runs pretty good! Nice model and lots of details. I replaced the plastic printed side skirts with steel ones.











Printed upgraded spade - gotta love the resin printers!



more progress soon.
Bob

tankme

Very nice. I was actually trying to pick one of these up the other day off his new website, but the site wouldn't calculate shipping for some reason. I'll try again later or hit him up through FB.

RC_BobM

tankme,
You may have to message him directly from FB messenger. He's usually pretty responsive.
I upgraded a lot of things over the basic kit - but overall its pretty good and comes with decent assy instructions. The best part is fully loaded its still under 30lbs!
Bob

Crius

Looks good, Bob, what are you going to use for sound? Mine has an IBU 2 Pro in it so I added the TPA amp and I run it through two 4-in, 4 ohm speakers in a custom-made wooden box and it sounds absolutely fantastic. One of the great things about this scale is you have enough room inside for stuff like decent speakers. What kind of other things are you going to do with it, like smoke or anything like that? I put the 50 caliber paintball cannon in mine and that has been great fun, are you going to go with any kind of projectile or maybe a muzzle flash? And does it have recoil? That was one thing I had to give up in order to make it shoot paintballs, but I use the barrel recoil Servo to pull the trigger on the paintball gun. Anyway, great work on that, it looks great.

RC_BobM

Hi Gary - for sound I will try ESS Dual Sense. Something easy and cheap for now, but they are not super loud with their tiny speakers. Maybe Benedini if I get really motivated and want more sounds. I don't have any of the IBU or Clarke boards.

Muzzle flash would be cool, but I'm not sure how to add that without 1/16 Tamiya or IBU type board.

The model does include recoil - I don't have that servo installed yet. Testing the driving with just 4 channels for now.

I don't usually do smoke in my models. As you can probably surmise, I'm better at building than electronics! LOL
Bob