The densiest block in-game (Quick PSA).
Greetings fellow builders!
I've come here to give a quick list on what are the densiest (not the heaviest) blocks/parts you can use in this game. This is very useful for 2 main reasons:
1 - Makes armoring against AP more compact.
2 - Helps adding ballast more efficiently.
How to calculate block density in this game: mass/hitbox size[blocks/voxels].
Note: I cannot tell whether this game rounds up or rounds down values, even if it rounds them at all. However, I believe this doesn't matter as you only want to cross certain thresholds with them.
Now for the list:
The densiest block in the game is: The Small Keel! It should've been expected that the new keel blocks would make a debut on this list, however, it may surprise some that the small keel is the densiest part in the entire. The reason for this is because the devs scaled mass linearly while volume increased by the cube and since the small variants comes packing with a whopping 500 mass in a small footprint of only 29 blocks, that makes it have a density of 17,2 mass/block. For comparison, the medium keel only has a density of 6.8 mass/block and the big one packing slightly less, packing only 6,55mass/block.
One the second places on this list we have the Battle Cannon Extension! No, I am not talking about all of them, just the simple variant with the normal hitbox (3x1x1). This battle cannon extention keeps the same mass as the other ones albeit with a smaller hitbox, making it more dense than the others, this density means it crosses two major thresholds for AP protection: It needs one less block to stopp both Battle Cannon AP and Heavy Autocannon AP. Thanks for an oversight, this part has a density of 13.33 mass/block, that means a single battle cannon extention put sideways (i.e with the long side perpendicular to the impact) in capable almost stopping Heavy Autocannon AP (14 mass/block required to stop) on its own, removing the need for an extra weight block entirely, battle cannon AP (25 mass/block) follows a similar logic, except it now requires two barrel extentions sideways instead of just one sideways to completely stop it, against removing the need for the extra layer you'd have to add if you were using weight blocks.
And now and only now we get to the standard Weight Blocks with a density of only 10 mass/block. Doesn't seem that impressive, does it?
Extra
Now for the least dense blocks in-game we have the new buoyancy blocks, with the buoyancy block, buoyancy wedge and buyoancy pyramid as the top 3 in the desceding order with a density of 0,015; 0,021 and 0,026 respectively. That's the biggest reason to why they start to take off on water, they are so light the game physics literally freaks out when calculating their buoyancy that it causes the engine to fling them into the air instead of keeping them afloat.