Coupled approach?

Roy Smith wrote in
:

"James M. Knox" wrote:
The AI provides the "wing leveler" primary input, while the DG and
NAV signals are summed to provide a heading. Amazingly effective,
for such a trivial analog approach, it will (if carefully adjusted)
intercept and track a NAV signal. However, in a strong crosswind, it
will do so "off" the actual courseline (parallel to it).

Not quite parallel, but rather with a constant CDI offset, which for
VOR and LOC signals means a constant angular displacement.

Good point... It's a constant voltage offset. I beleive one of the Century
(or old Mitchell) manuals actually uses the word parallel, but you are
right - it's a constant degree offset, only parallel for following
something like a GPS courseline.