What's considered a steep turn by the airlines?

A friend (non pilot) was coming back into Newark (commercial) the other
night when they got a hold due to weather over the field. He said things
were pretty normal until they suddenly banked "way over" and everyone was
concerned because they were all pushed into their seats. The captain came
on the intercom and apologized, explaining that in order to stay in their
holding pattern without flying into a thunderstorm, he'd had to make a
steeper than usual, not to worry, aircraft are designed for that, etc., but
that it was likely to happen again shortly. Sure enough, the captain came
on again, this time to warn everyone, and they again did the steep turn.
After that they landed without further incident.

My friend was asking about the turn. He said that it seemed really steep.
I explained that if the turn had been a 45-degree bank, they would have
needed 1.4 g to maintain altitude, and 2 g if they'd banked to 60 degrees.
He then asked why, as a very seasoned passenger, he'd never noticed such a
thing before. Anyone know what the maximum bank angle most airlines try to
maintain? Just curious.

--
Bob (Chief Pilot, White Knuckle Airways)

On Wed, 22 Jun 2005 18:24:45 -0400, "Bob Chilcoat"
wrote:

Anyone know what the maximum bank angle most airlines try to
maintain?

The flight director typically commands 25 degrees of bank and anything
over 30 degrees of bank will get you an aural warning from the
computer.

"Steep turns" of 45 degrees bank are routinely practiced in the
simulator, FWIW.

-Jack

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Steep Turn (from my 727 manual, Flight Training Section):

"45 degree bank angle, at 240 KIAS"


"Turns
"Bob Chilcoat" wrote in message
...
A friend (non pilot) was coming back into Newark (commercial) the other
night when they got a hold due to weather over the field. He said things
were pretty normal until they suddenly banked "way over" and everyone was
concerned because they were all pushed into their seats. The captain came
on the intercom and apologized, explaining that in order to stay in their
holding pattern without flying into a thunderstorm, he'd had to make a
steeper than usual, not to worry, aircraft are designed for that, etc.,
but
that it was likely to happen again shortly. Sure enough, the captain came
on again, this time to warn everyone, and they again did the steep turn.
After that they landed without further incident.

My friend was asking about the turn. He said that it seemed really steep.
I explained that if the turn had been a 45-degree bank, they would have
needed 1.4 g to maintain altitude, and 2 g if they'd banked to 60 degrees.
He then asked why, as a very seasoned passenger, he'd never noticed such a
thing before. Anyone know what the maximum bank angle most airlines try
to
maintain? Just curious.

--
Bob (Chief Pilot, White Knuckle Airways)

Bob Chilcoat wrote:
A friend (non pilot) was coming back into Newark (commercial) the
other night when they got a hold due to weather over the field. He
said things were pretty normal until they suddenly banked "way over"
and everyone was concerned because they were all pushed into their
seats. The captain came on the intercom and apologized, explaining
that in order to stay in their holding pattern without flying into a
thunderstorm, he'd had to make a steeper than usual, not to worry,
aircraft are designed for that, etc., but that it was likely to
happen again shortly. Sure enough, the captain came on again, this
time to warn everyone, and they again did the steep turn. After that
they landed without further incident.
My friend was asking about the turn. He said that it seemed really
steep. I explained that if the turn had been a 45-degree bank, they
would have needed 1.4 g to maintain altitude, and 2 g if they'd
banked to 60 degrees. He then asked why, as a very seasoned
passenger, he'd never noticed such a thing before. Anyone know what
the maximum bank angle most airlines try to maintain? Just curious.

A normal turn is limited to 30° bank. Anything more than that could be
called a steep turn. A "steep turn" as a maneuver uses 45° of bank. Most
autopilots will not command more than 30° of bank.

--

Darrell R. Schmidt
B-58 Hustler History: http://members.cox.net/dschmidt1/
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