The 5° bank angle is in the Part 23 regulations for aircraft
certification and only considers a limitation on stopping
the turn. A steeper bank can stop a turn if you are below
Vmca and are sloppy enough to have lost control. But 5° is
just a limitation on the certification test pilot. The bank
angle reduces the need for more rudder which the design may
not have. There is also a limit of 150 ponds of rudder
force, which can be done pretty easily by a man, but may be
harder for a 100 pound woman. But the is aircraft
certification.

The 2-3° bank is for zero sideslip and maximum climb
performance. It will vary with aircraft make and model and
operating weight. The point is too have zero yaw angle so
the drag is as low as possible and get the maximum climb
rate.



--
James H. Macklin
ATP,CFI,A&P

"kevmor" wrote in message
ups.com...
|I just finished reading the Jeppesen "flight discovery"
series for
| their Multiengine manual, and just started reading the
ASA's The
| Complete Multiengine pilot. I noticed in their book that
they
| mentioned several times that, for best performance, you
don't need 5
| degrees of bank that planes are tested at. It stresses to
use less,
| such as 2-3 deg. depending on the plane. I noticed in
your book (pg.
| 1-5) it says "at least 5 degrees"...which is correct? I'd
have to
| check the Jeppesen one again, but I think they tested
climb rates with
| different bank angles to figure the best one.
|