IS2 Scratch Build

[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!

[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.

Slapped a coat of paint on the upper hull as I got fed up of seeing it looking like frankensteins monster




Just the drivers hatch cover, the shackles, and the light to do on the upper hull

Alwyn

[wyvern]

What a difference a coat of paint makes - looking great

[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.

The kit from Ian needed to be modified to work with my pivot mechanism
Starting point


Start by cutting off the standard pivot

and then attaching the recoil unit to my pivot with a printed joint



Assemble the recoil unit


and carefully fit to the turret


A fiddly job but now it's ready to fit the elevation motor



Alwyn

[Soeren]

Nice
Question, wouldnt an elevation servo work as well?

[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

[Soeren]

I see, the levering of the stock elevation would be a better option then. Will you change this with the Ibu2 unit?

[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
Alwyn

[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



I love my printer (when it's working).

Alwyn

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 () ;

[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!



Obviously it will get a proper paint job later when all turret, mechanicals, and elecricals are all sorted.

Now on to the turret.

Alwyn