Results 31 to 40 of 41
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03-07-2009, 11:02 AM #31
- Join Date
- May 2008
- Location
- Earth
- Posts
- 288
The purpose of the program is to read some values from FS like the MAC%. Entering the MAC% on the FCU / FMS then gives a trim value. Setting this trim value results in a better rotation on take-off. Setting the trim too far forward will result in a heavy to lift nose, while too aft will result in an aircraft that just wants to get airborne by itself.
In flight the autopilot uses the trim to set the correct pitch for climb, cruise etc. On a B737 for example one can actually see the trim wheels move. And hear them cluck cluck cluck if it is bigger movements.Fritz -> Helicopter Cockpit Builder
(FSX | TH2Go | Arduino | Air Manager Avionics | CNC)
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03-07-2009, 11:10 AM #32
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03-07-2009, 11:14 AM #33
Thanks for the explanation Fritz. It was because I was seeing such crazy figures it made it difficult to appreciate its use. I usually set my trim to the same value irrespective of weight so it will be useful to be able to set it accurately.
And now that I know the original version only works correctly with FSX it explains everything.Ray
3 miles east of EGCC - home to British Airways Concorde 'Alpha Charlie'
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03-07-2009, 11:54 AM #34
- Join Date
- May 2008
- Location
- Earth
- Posts
- 288
Sorry I have to correct myself. The autopilot does not use the Trim to change pitch. It uses the actuators to do that. And then does it trim to reduce the loads on the controls. Same as a human would have done.
As an observer on the flight deck, one will think the autopilot uses the trim only because that is the most obvious movement you see.Fritz -> Helicopter Cockpit Builder
(FSX | TH2Go | Arduino | Air Manager Avionics | CNC)
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03-08-2009, 04:31 AM #35
- Join Date
- Jan 2006
- Location
- UK / Germany
- Posts
- 174
Hi
Great program, nice tool to have handy when you need it for sure. We actually have place holders for this in the Instructor Station under the fuel / load page, but due to other things it dropped off the development radar a bit. We will try and get that done shortly. I also noticed that during our update process in the past couple of weeks we seem to have broken the facility in the CDU for the trim, we will get that fixed as well - sorry about that.
Regards
Jonathan Richardson
Project MagentaJonathan Richardson
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Post Thanks / Like - 2 Thanks, 0 Likes, 0 DislikesRGroebl, Matt Olieman thanked for this post
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03-13-2009, 08:09 PM #36
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03-13-2009, 08:24 PM #37
Hi Ray,
I am working about 1 hour max per day. Hope to finish the fsx version this weekend and start immediattely with fs9 version. Take a look what other options the program will include
http://www.mycockpit.org/forums/showthread.php?t=15435
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03-13-2009, 10:30 PM #38
Fantastic help. Well appreciated. Patiently waiting.
Cheers
jackJackpilot
B737-700 Posky
FS9/P.Magenta
without PMSystem
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03-14-2009, 05:24 AM #39Ray
3 miles east of EGCC - home to British Airways Concorde 'Alpha Charlie'
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03-14-2009, 06:07 AM #40
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