Aircraft weight and payload question

[fweinrebe]

[IMG]
Thanks to Achilles for providing this utility but its purpose is a mystery to me.

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.

The Trim Indicator Value changes in flight but I don't see a Trim Value Box.

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.

[Ray Proudfoot]

Sorry forgot to mention that I tested with FSX.

I will prepare a new version for fs9 also.

Ah, thanks. I thought there must be something strange happening.

I think you'll find many people here are still using FS9 so that version will be appreciated.

[Ray Proudfoot]

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.

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.

[fweinrebe]

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.

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.

[JonathanRichardson]

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 Magenta

[Ray Proudfoot]

Sorry forgot to mention that I tested with FSX.

I will prepare a new version for fs9 also.

Hi Achilles,

I was wondering if you had started on the FS9 version of this program. It looks very useful and many of us still fly with FS9.

Thanks.

[AchillesP]

Hi Achilles,

I was wondering if you had started on the FS9 version of this program. It looks very useful and many of us still fly with FS9.

Thanks.

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

[Jackpilot]

Fantastic help. Well appreciated. Patiently waiting.
Cheers
jack

[Ray Proudfoot]

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

Hi Achilles,

That's an impressive list. But you've missed one thing out. I don't see a button to press that will make me a cup of tea!

Seriously, I appreciate your efforts and thank you for providing this to our community.

[jonnydaz53]

Ray are you father ted !