as the speed at which full rudder could hold the full thrust of the live engine, if the other one failed, was something over 175 kts (as I recall it).
That is a remarkably high speed, but about the range that I imagined it must have been, looking at the design.
Can you remember what Vso was (stall speed in landing configuration)? I'd imagine that it was quite reasonable, given the high aspect ratio straight wing. I'd guess that approach speeds were determined by the high Vmca, rather than the low Vso.