Hopperdhh(at)aol.com
Guest
|
 Posted: Sun Mar 11, 2007 9:14 am Post subject: Autopilot wing rocking |
 |
|
This wing rocking problem is covered under "SETTING SYSTEM GAIN" in the
Navaid manual.
Quoting from my manual, page 14:
"The autopilot should fly the airplane in a manner more or less similar to
that of human pilots. If the stick action feels too jittery for the weather
conditions, or if the airplane is continually hunting (oscillating) back and
forth like a snake trying to follow a straight line, the system gain is probably
set too high for your aircraft.
"Remembering that the trimpots should not be forced beyond their 9 o'clock
and 3 o'clock stops, you lower system gain by turning the SPAN trimpot
counterclockwise. Decrease the gain (turn SPAN trimpot counterclockwise) until the
stick calms down, then increase it to the point where the stick becomes jittery
again. With your airplane operating at its usual cruise speed, set the gain as
high as possible without oscillation or jittery stick movement.
"If the SPAN trimpot ends up being set below 75% of maximum (full clockwise),
the servo RANGE trimpot is set too high and tracking performance may be
degraded. The following procedure increases servo resolution without changing
system gain. Land the airplane and measure (better write it down) the full range
of aileron movement obtainable using the TURN CONTROL with the autopilot in
Wing Leveler mode.
"Set the span to about 90% of full clockwise rotation.
"Adjust the RANGE trimpot on the servo printed circuit board to restore that
same range of aileron deflection."
Dan Hopper
RV-7A
<BR><BR><BR>**************************************<BR> AOL now offers free
email to everyone. Find out more about what's free from AOL at
http://www.aol.com.
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
