Hmm. I worry that making the shells too complex might limit their availability. I want to make them out of cast iron, and I'm not sure that cast-iron fins will work- they may be too fiddly to make molds for, or they might be so brittle that they constantly break off. I mean, I'm no expert on metallurgy. If someone with more knowledge than me reckons we can do cast-iron fins, we absolutely should.
We really need magnetic adamantium. Then we could make our shells do whatever the heck we like.
Hmm. Maybe that should be next turn's design? Crazyabe has been advocating for attaining more control over adamantium's properties. With a design, we could make translucent adamantium, conductive adamantium, magnetic adamantium, and whatever other properties we might care to give it.
If we want to do that, then yeah, we shouldn't do shells this turn, since we'd be making them obsolete almost immediately.
In which case, we'd be doing something like
Reliable Lightning Bulbs: Investigating broken or burnt out Lightning Bulbs has revealed a number of common issues leading to their failure. We have called in the al-Chemists (with explicit instructions to bring absolutely nothing explosive or flammable into the city) to help us design a process to create the perfect alloys from which to construct the metal components- by achieving the right 'thermal expansion properties' matching those of the glass, the chance of breakages should be reduced.
Sudden surges of power are another issue that leads to burn-outs. These can be avoided by slowly increasing the 'voltage' (a term coined by the new class of electro-engineers) using a 'thermistor' (don't even worry about it).