How much scrap do I get with two Scrap Recovery Arm augments installed? 110%, 120%, 121%, or some number that doesn't make any sense?
FTL: Faster Than Light – Benefits of Having Multiple Scrap Recovery Arms
ftl-faster-than-light
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Best Answer
After reading Hackworth's table, I decided to test a bit. I got 2 scrap recovery arms, and started writing down every time I received some scrap. I wrote down both the amount I was promised and the actual amount I received. Then I put it in Excel, and compared it to 3 lists corresponding to Hackworth's A, B and C (additive, multiplicative and independently rounded, respectively). It turns out the formula (at least for 2 arms, I assume it's the same for 3) is: Scrap received = floor(Scrap promised * (1 + 10% / (number of arms) ) or: Sr = floor(Sp*(1+0,1*n))
Documentation: Excel sheet with data (I also have screenshots from 3 different amounts, but as a new user I'm not allowed to post more than 2 links in one post)
tl;dr: The arms stack additively rounded down