The Repair Arm augment has the following description:
Repair Arm
Repairs your hull every time you collect scrap, but reduces scrap collected by 15 percent.
Does anyone know by how much it repairs your hull? Should I assume from the description that it repairs the hull by just one HP each time scrap is collected, or might it vary (e.g. one HP for each 10 scrap collected)?
Best Answer
From personal experience (which seems backed up by this thread where the developer responded), the Repair Arm heals you 1 hull point, regardless of the amount of scrap collected.
From the developer via that thread as well:
The FTL Wikia seems to agree with this as well: