RW-1,
I haven't done any night flying in helis yet, but this sounds to me like one of those classic cases of spatial disorientation or visual illusions you can get with reduced visibility. Landing accidents in fixed wing aircraft have occurred because in poor visibility acceleration can be perceived as pitching up, causing a tendency to lower the nose, which of course worsens the illusion so that the aircraft flies into the ground. In a helicopter you slow down on the approach; would this be the exact opposite - perceived as pitching down, so you tend to unconsciously pull back. I'm not sure. Interesting though; does anyone else know?
I guess this is another case of trusting your instruments.
(Well done; you may have got us off the R22 discussions
)
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Whirly
To fly is human, to hover, divine.