David, the issue for me was 1 g down, into the seat. In a steady state
climb one experiences one G, but if the nose is 5 degrees up that force
is 5 degrees aft of down. My understanding of the question (and it
could not be an accurate understanding) was, can one somehow roll an
airplane without having it experience anything other than 1 g "down". I
think it's been shown the airplane can be rotated 360 degrees on its
axis with the pilot always experiencing 1 g down into the seat. At that
point though the airplane is going downward pretty fast, and the weight
vector would shift forward of straight down.