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Re: IS2 Scratch Build

Posted: Mon Nov 06, 2017 8:19 am
by wibblywobbly
Jeez, not a lot of room in there for the barrel pivot, that must be a bit of a challenge? Loving the upper hull, that has come out very nicely! :clap:

Re: IS2 Scratch Build

Posted: Tue Nov 07, 2017 11:06 am
by AlwynTurner
More progress

Barrel pivot secured and removable for repair/adjustment. It was a bit tricky designing something secure enough for the heavy barrel, capable of allowing secure pivoting, and also removable.
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Slapped a coat of paint on the upper hull as I got fed up of seeing it looking like frankensteins monster
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Just the drivers hatch cover, the shackles, and the light to do on the upper hull

Alwyn :thumbup: :wave:

Re: IS2 Scratch Build

Posted: Tue Nov 07, 2017 7:17 pm
by wyvern
What a difference a coat of paint makes - looking great

Re: IS2 Scratch Build

Posted: Tue Nov 07, 2017 8:19 pm
by AlwynTurner
Thanks Wyvern. It's been a busy day starting with the arrival in the post of the servo recoil kit from Tankbear - thanks Ian. :clap:

The kit from Ian needed to be modified to work with my pivot mechanism
Starting point
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Start by cutting off the standard pivot
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and then attaching the recoil unit to my pivot with a printed joint
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Assemble the recoil unit
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and carefully fit to the turret
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A fiddly job but now it's ready to fit the elevation motor :crazy: :/
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Alwyn :thumbup: :wave:

Re: IS2 Scratch Build

Posted: Tue Nov 07, 2017 9:02 pm
by Soeren
Nice :D
Question, wouldnt an elevation servo work as well?

Re: IS2 Scratch Build

Posted: Tue Nov 07, 2017 9:07 pm
by AlwynTurner
Hi Soeren, the barrel is very heavy and I think even a heavy duty servo would battle to lift it, plus I have a HL elevation motor in my spares box and I want to get the tank working with an RX18 before I put in an IBU2 pro, so I can test everything except the recoil using the RX18.

Alwyn :thumbup: :wave:

Re: IS2 Scratch Build

Posted: Wed Nov 08, 2017 9:17 am
by Soeren
I see, the levering of the stock elevation would be a better option then. Will you change this with the Ibu2 unit?

Re: IS2 Scratch Build

Posted: Wed Nov 08, 2017 10:02 am
by AlwynTurner
Hi Soeren, it depends on how well it works. If it doesn't function as well as I would like I wil probably experiment with an elevation servo once I have the IBU2.

Thanks for the interest :thumbup:
Alwyn :thumbup: :wave:

Re: IS2 Scratch Build

Posted: Wed Nov 08, 2017 2:56 pm
by AlwynTurner
Just to demonstrate what can be achieved with a couple of lines of openscad code, I designed and printed the shackles for the IS2
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I love my printer (when it's working). :D

Alwyn :thumbup: :wave:

here's the code

module shackle () {
difference () {
union () {
rotate ([0,90,0]) translate ([-1.5,7,-3])cylinder(h = 6, r = 3, $fn=80);
rotate_extrude (angle=45, convexity = 9) translate ([5,1.5,1]) circle (r=1.5, $fn=80);
}
rotate ([0,90,0]) translate ([-1.5,7,-3.5])cylinder(h = 7, r = 1.25, $fn=80);
rotate ([0,0,0]) translate ([-1.5,3,-3]) cube ([ 3 ,10 ,10]);
}
}


shackle () ;

Re: IS2 Scratch Build

Posted: Wed Nov 08, 2017 7:17 pm
by AlwynTurner
And as the saying goes - It's a wrap!

just finished adding the shackles and the headlight, so the upper hull is now complete!
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Obviously it will get a proper paint job later when all turret, mechanicals, and elecricals are all sorted. :crazy:

Now on to the turret.

Alwyn :thumbup: :wave: