M10 Achilles Scratchbuild 3d Print

This section is for builds that are not strictly Tamiya or Heng Long. For instance, replacing the electronics from a WSN or Matorro, or even a scratch-build.

Postby AlwynTurner » Fri Jul 01, 2022 6:14 pm

After throwing out a query for the next build Mick came up with the idea of an M10 Achilles, and as a change from all those tanks beginning with C I decided it was a great idea so here we go
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and a start on the turret (still a lot of work to do on this)
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At least it's a beginning on something new :crazy: :haha: :D
Alwyn :wave:
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Postby Son of a gun-ner » Fri Jul 01, 2022 6:53 pm

Will this utilise the standard Heng Long turret rotation setup?
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Postby Son of a gun-ner » Fri Jul 01, 2022 7:01 pm

These may come in handy.
It would appear the bottom right bar of the protective barrier is meant to be curved inwards.
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Postby AlwynTurner » Fri Jul 01, 2022 7:29 pm

The design will provide for a slightly modified turret rotation ring but will still work with the hl turret rotation motor. I'm going to have to take out the usual turret floor as per the photos which are really useful thanks.

It's going to be fun fitting a battery and electronics into what's left of the hull 8O :crazy: :haha:

Alwyn :thumbup: :wave:
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Postby Ecam » Fri Jul 01, 2022 11:02 pm

Son of a Gunner,
That first picture shows ready racks on the left front of the turret wall. They are absent in the second. I wonder if that was a field mod, or possibly a Korean war mod?!?

Alwyn, going to be watching this build with excitement!
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Postby Son of a gun-ner » Fri Jul 01, 2022 11:48 pm

Ecam wrote:Son of a Gunner,
That first picture shows ready racks on the left front of the turret wall. They are absent in the second. I wonder if that was a field mod, or possibly a Korean war mod?!?

Alwyn, going to be watching this build with excitement!

Good question. I only collected those pictures for the breech detail. Maybe the pictures with the barriers are a late mod. Also there's every chance the racks were removed before the new owners acquired the tank.
I'm sure those racks were an original feature.

Edit to add, I have a Tamiya kit, I'll take a look at that, although there's no guarantee the Tamiya kit is correct.
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Postby tomhugill » Sat Jul 02, 2022 10:43 am

Very exciting alwyn! I have an m10 printed shell but no gun or turret interior, might be tapping you up for some bits to finish mine!
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Postby AlwynTurner » Sat Jul 02, 2022 12:56 pm

Some progress on the gun
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Just a start really, lots to do. I managed to open the base of the turret as much as can be given the hl turret gear limitations. I've also started to prepare for the gun mantlet. There will definitely be no possibilty of a recoil mechanism because there just isn't space.

Alwyn :thumbup:
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Postby Son of a gun-ner » Sat Jul 02, 2022 3:12 pm

AlwynTurner wrote:There will definitely be no possibilty of a recoil mechanism because there just isn't space.

That's defeatist talk. . . . :haha: :haha:
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Postby AlwynTurner » Sat Jul 02, 2022 3:43 pm

Here's progress on the gun
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Alwyn :thumbup: :wave:
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Postby c.rainford73 » Sat Jul 02, 2022 10:24 pm

Looking great Alwyn. Could you possibly sneak a micro servo under the gun like the 88mm you printed for the Nashorn and make it recoil? Either way it's fantastic

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Postby HERMAN BIX » Sat Jul 02, 2022 11:15 pm

In other words
“ Just DO it “
:D
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Postby AlwynTurner » Tue Jul 05, 2022 2:23 pm

WOW!!! Jusy received an amazing goody bag from Mick of parts for the build
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Many many thanks to Mick :clap: :clap: :thumbup: :D

This build will now move to high gear!

Alwyn :thumbup: :wave:
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Postby AlwynTurner » Wed Jul 06, 2022 12:56 pm

After some brutal work on the sherman chassis to remove the battery box and associated fixtures and fittings I started to look at how the turret would be mounted. I had a goldilocks dilemma, the standard HL turret ring was too small, the large HL turret ring was too large at 140mm diameter, so I had to devise my own which is just right (that's the one on the left, the one on the right is the standard.
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Having developed and printed the gear ring, the next move was to modify the turret design and it now looks much better, plus I could make a start on the upper hull. The turret floor opening is almost correct to the blueprint but I can't enlarge it any more due to the constraints of the turret gear ring.
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The turret base opening is almost correct to the blueprint and the new design turret ring is still compatible with the HL turret turn motor.
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The upper hull is still in skeleton form for prototyping as I don't want to waste time and filament printing something that may not work. Once I've printed and proved it I can then fill it out.

Alwyn :thumbup: :wave:
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Postby whitecitadel » Wed Jul 06, 2022 4:13 pm

Your new turret ring looks excellent, can I ask what your doing the design in is that Fusion 360?

I have only really tinkered in tinkercad, but as I look making parts for Tank's it seems I have many hours of learning ahead to try and get some basic skills in 360.

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Postby AlwynTurner » Wed Jul 06, 2022 5:59 pm

Hi, I use OPENSCAD and have used it for about 5 years now, I find a flexible and powerfull CAD tool and is fairly easy to learn, after all I learned it and I never had any previous experience with CAD. The link is here
https://openscad.org/
The software is free, well supported, and there are many teaching videos plus an excellent on-line help manual available. I can thoroughly recommend it. The turret gear was a design done using a gear model available on Thingiverse
https://www.thingiverse.com/thing:4194148

In fact there are a number of scad designs on thingiverse

Thanks for the interest
Alwyn :thumbup: :wave:
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Postby whitecitadel » Wed Jul 06, 2022 8:42 pm

Thanks for taking time to reply, I am going to investigate openscad then, and the thingiverse model for gears.

I have been watching YouTube tutorials in an attempt to understand rack and pinion for recoil in fusion360 - pretty complicated stuff!

The Achilles is going to look great :thumbup:

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Postby AlwynTurner » Wed Jul 06, 2022 10:18 pm

The first section of the upperhull is printed
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Oh I do love it when a plan comes together :haha: :haha: :D
I'm thinking that rather than filling in the skeleton I will rather skin it, It will make it faster to print and because the skins will be printed flat there will be no desposition lines plus detail can be added without being distorted.
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Postby Edumardo » Thu Jul 07, 2022 7:43 am

Hi Alwyn!

Fantastic work, I will stay here to see your progress :clap: :clap:

I like the idea to use a skeleton form for prototyping, thanks for share with us :thumbup:
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Postby AlwynTurner » Thu Jul 07, 2022 2:34 pm

The front part of the upper hull is now printed and I can see some minor tweaks that I need to do, but generally it's looking good and fitting perfectly.
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I'm really pleased with the turret open space as the turret gear ring fits perfectly

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Looking good so far
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