Monday 14 September 2020

Misc: Detailing my 88s...

My collection of scratch-built bits for resin casting nears completion....

Here's where I was at around midday today, having added a three shell wicker ammo-box (inc. lid), a single shell metal canister, and a spent round. These are in addition to the carriage mounts, erdpfahl (the trefoil perforated stakes), a winding handle, and a linkage for the folding legs, that I'd already made earlier.

Making the live shell - the only new element in the second pic, below - took ages. First I tried sculpting sprue using a Dremel style hobby tool. But this span too fast, even wound down to its slowest speed, causing the sprue to overheat and snap. I then tried working with brass. Not having any brass rod, I hacksawed a strip off a piece of brass sheet. I then span that in the drill to round it down. This also overheated and snapped off, long before it had gotten properly shell-shaped.

And bingo... all the sundry elements I'm intending to cast.

So, after numerous failed attempts, I reverted to searching out bits of sprue of roughly the right diameter, that might be viable for the different segments: base, propellant case and warhead. I wound up gluing three different diameter bits of sprue together, which, with some minimal profile shaping, finally gave me a shell I was happy-ish with. 

I think I'll make an initial mould and cast several sets, and then perhaps I'll make a second mould with a proper complement of items; two carriage mounts, four stakes, x ammo boxes and shells, etc. Or maybe the first mould will suffice? I guess I'll see which way the wind blows when the time comes...

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