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Old 10-23-2018, 08:28 AM   #41
Nansaram
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Quote:
Originally Posted by backspace340 View Post
Trim is different in different flap modes - if you've got the gear down and full flaps, then you're in approach mode and the trim is setting the AOA that the FCS targets, not a 'trim' in the traditional sense of the word like you'd find on something like the F-5E.
Again, The manual said
"Little if any pitch trim is
required in the auto flap up mode due to the automatic trimming functions within the flight control
computers. In MECH, pitch trim moves the control stick fore and aft, changing the stick neutral point.
There is no mechanical lateral trim."

FCS function is same as your Mirage or F-16 Falcon4.0 or Janes FA-18 some years ago.

Just make the trim SW work in Auto Flap mode. Please
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Old 10-23-2018, 08:34 AM   #42
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Quote:
Originally Posted by Nansaram View Post
Again, The manual said
"Little if any pitch trim is
required in the auto flap up mode due to the automatic trimming functions within the flight control
computers. In MECH, pitch trim moves the control stick fore and aft, changing the stick neutral point.
There is no mechanical lateral trim."

FCS function is same as your Mirage or F-16 Falcon4.0 or Janes FA-18 some years ago.

Just make the trim SW work in Auto Flap mode. Please
I'm not sure what you're trying to argue now - trim does work in Auto Flap mode, it's just slow and it's not quick enough to overcome the violent pitch up like I just said a couple of posts ago.

The bug here is not trim, it's that the leading-edge flaps and trailing-edge flaps get stuck in a pitch-up position until you cycle the flaps switch. Trim works whether it's pitching up or not, whether you've cycled the flaps or not, the only difference is that the LEF & TEF aren't stuck on +30 after you cycle the flaps.
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Old 10-23-2018, 08:38 AM   #43
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Quote:
Originally Posted by Nansaram View Post
Again, The manual said
"Little if any pitch trim is
required in the auto flap up mode due to the automatic trimming functions within the flight control
computers. In MECH, pitch trim moves the control stick fore and aft, changing the stick neutral point.
There is no mechanical lateral trim."

FCS function is same as your Mirage or F-16 Falcon4.0 or Janes FA-18 some years ago.

Just make the trim SW work in Auto Flap mode. Please
MECH is a backup mechanical control for the stabilators it is not used in normal flight. Following copied directly from the 000:

"Pitch and Roll Trim Switch. Normally, movement of the pitch and roll trim switch
electrically biases the flight control computers and the stick does not move.
Little if any pitch trim is
required in the auto flap up mode due to the automatic trimming functions within the flight control
computers. In MECH, pitch trim moves the control stick fore and aft, changing the stick neutral point.
There is no mechanical lateral trim."

And yes.. Trim is different for different flap settings.
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Last edited by Deano87; 10-23-2018 at 08:46 AM.
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Old 10-23-2018, 08:49 AM   #44
Nansaram
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Quote:
Originally Posted by Deano87 View Post
MECH is a backup mechanical control for the stabilators it is not used in normal flight. Following copied directly from the 000:

"Pitch and Roll Trim Switch. Normally, movement of the pitch and roll trim switch
electrically biases the flight control computers and the stick does not move.
Little if any pitch trim is
required in the auto flap up mode due to the automatic trimming functions within the flight control
computers. In MECH, pitch trim moves the control stick fore and aft, changing the stick neutral point.
There is no mechanical lateral trim."

And yes.. Trim is different for different flap settings.

No no... MECH means just "mechanically", There is no backup control in FA-18...
"There is no mechanical lateral trim." in last words in manual...

In Auto mode, I press tens of times and press hold some minutes. but no respond. it meas no work. may be the FCS number could be changed but may be the gain must be too low.

Make the trim for pilot, not the FCS... please

Last edited by Nansaram; 10-23-2018 at 08:52 AM.
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Old 10-23-2018, 08:51 AM   #45
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Wrong...again
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Old 10-23-2018, 08:53 AM   #46
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Quote:
Originally Posted by Nansaram View Post
No no... MECH means just "mechanically", There is no backup control in FA-18...
"There is no mechanical lateral trim." in last words in manual...

In Auto mode, I press tens of times and press hold some minutes. but no respond. it meas no work. may be the FCS number could be changed but may be the gain is too low.

Make the trim for pilot, not the FCS... please

No, no, no, no, no.....MECH IS the FCS backup in Roll and pitch when everything has failed!!!
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Old 10-23-2018, 08:53 AM   #47
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2.8.2.10 Mechanical Linkage (MECH). Mechanical linkage provides backup control of the stabila-
tors for pitch and roll control. A MECH ON caution is displayed on the DDI. See FCS Failure
Indications and Effects, Chapter 15. In the mechanical mode, stick movement directly controls the
stabilator actuators bypassing all force sensors, the flight control computers, all air data, all motion
feedbacks, servos, and associated electrical wiring.
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Old 10-23-2018, 08:53 AM   #48
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Quote:
Originally Posted by Nansaram View Post
No no... MECH means just "mechanically", There is no backup control in FA-18...
"There is no mechanical lateral trim." in last words in manual...
You're incorrect - read 11.3.2 of the NATOPS, titled 'FCS Degraded Modes (DEL/MECH)' - MECH is the degraded mode when the FCS completely fails or you lose all electrical power.
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Old 10-23-2018, 08:54 AM   #49
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Quote:
Originally Posted by Nansaram View Post
No no... MECH means just "mechanically", There is no backup control in FA-18...
"There is no mechanical lateral trim." in last words in manual...

In Auto mode, I press tens of times and press hold some minutes. but no respond. it meas no work. may be the FCS number could be changed but may be the gain is too low.
You're wrong.

"Normally, inputs to the hydraulic actuators are provided by the two flight control computers (FCC A
and FCC B) through the full authority control augmentation system (CAS). A direct electrical link
(DEL) automatically backs up the CAS. DEL is normally a digital system but has an analog mode for
backup aileron and rudder control.If digital DEL fails, a mechanical link (MECH) automatically
provides roll and pitch control through a direct mechanical input from the stick to the stabilator
actuators. MECH bypasses both flight control computers and the stabilator actuator servo valves.
"

"Mechanical Linkage (MECH). Mechanical linkage provides backup control of the stabilators
for pitch and roll control.
A MECH ON caution is displayed on the DDI. See FCS Failure
Indications and Effects, Chapter 15. In the mechanical mode, stick movement directly controls the
stabilator actuators bypassing all force sensors, the flight control computers, all air data, all motion
feedbacks, servos, and associated electrical wiring.
"

And in AUTO mode the trim does work but the aircraft will eventually trim back to 1G after a number of seconds.
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Last edited by Deano87; 10-23-2018 at 09:00 AM.
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Old 10-23-2018, 01:47 PM   #50
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I find this post very interesting, this post is making me understand the problem.

I'm new on this sim and the f-18 are a very complex aircraft for me, I'm using VR and always cold start so having this issue caused by my "lack of correct procedure problem" and the fact that is not the same thing "a flat screen or use VR". In the last variant due to the high immersion sensation, landing to end a flight is a must, is not a pleasant sensation just remove the headset and start a new mission, is a frustration sensation end a flight with a button and not in the airfield.

Land the plane with the plane having this mortal tendency and not know how to correct it is not a pleasant sensation, even more, when you hear the explosion at the end...an emptiness sensation becomes present.
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Last edited by arturojgt; 10-23-2018 at 01:54 PM.
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