>Would it be because it is a big tail dragger with a relatively low stall speed? If the main wing stalls before the elevator, the plane will nose down and as the c of g is behind the main wing this makes the dive more exaggerated than an aircraft with a forward c of g?
I think you're a bit confused about "taildraggers" and c.of g.
The g.c is *not* behind the main wing ! If it was the plane would be incredibly unstable in the air
The c.g. is behind the main *wheels* ! Which like any tail dragger makes it unstable while on the ground ! , that is unstable directionally as a "ground vehicle".