Simple string used as artificial horizon?

"Morgans" wrote:
"GARY BOGGS" wrote in message
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I am amazed that anyone with a pilots certificate would actually
think anything hanging in the cockpit would tell you anything about
the horizon!!!! Please tell me these aren't certified pilots!

Amen. It is completely possible to have the string pointed at the
floor in a 90 degree bank, or even upside-down.

I believe it is impossible for a force vector of weight (always at 0
degrees; indicating down) added to a centrifugal force (at 90 degrees in
your example) to yield a resultant that is also at 90 degrees. Unless maybe
you're pulling infinite gees in those turns!

Since there is a structural limit to how much one can bank a plane or
glider and keep the resultant force vector directly through the floor,
there is a moderately large range of bank angles around 90 degrees where
you shouldn't be able to get the string pointed through the floor.

If you hadn't chosen a 90 degree bank as one of your examples I wouldn't
have been able to contest your post. Your statement appears to be true for
all other bank angles. :-)