757 FDE version 3.0 released !   
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757 FDE version 3.0 released !

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teropa

User / Moderator
Member Since: Oct 2003
115 posts

Posted on:
Apr 20, 2004, 2:03 PM

Post #1 of 3 (1317 views)
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757 FDE version 3.0 released ! Not logged in -   Reply 
Hi all!

Version 3.0 of our 757 flight dynamics is now available at www.simradar.com.

NEW in v3.0:

- pitch/speed values corrected to match real Boeing data in all phases of flight as close as possible
- stall speeds corrected (clean stall speed still is a bit lower than it should, not feasible to rectify)
- fixed the bug where sudden wind changes caused by realweather programs would cause the FDE to slow down during climb and/or cruise
- small corrections to climb performance
- decreased the ground effect to match the behaviour of a real 757 (the FDE ballooned way too easily)
- improved pitch and roll properties to match real 757 performance
- increased the nosewheel turning range, the aircraft will now turn in a lot tighter radius
- corrected ground acceleration in the takeoff roll to match real 757 performance
- created IDLE descent with correct FPMs for the entire descent
- corrected FLAP/SLAT animation sequences (visual model)

To download, goto:

http://www.simradar.com/File/2653/Boeing_757_200_PW2037_Flight_Dynamics_for_FS2002__version_3_0.html

and select "DOWNLOAD".

We recommend using these performance tables by Matt Zagoren in conjunction with the FDE.

http://library.avsim.net/sendfile.php?DLID=12749

Finally:

Use the Pilotmedia flight planner (http://www.pmfp.com) to plan your flights with this FDE to get accurate fuel calculations. The PMPF (and our FDE) uses Eurocontrol BADA fuel performance tables, so it will be accurate for our FDE. PMFP doesn't account for the winds on the flight, so you need to figure out the needed extras etc. yourself using SWC charts.

---

This release will conclude our work on the FS2002 757 FDE. Our next project will most likely be a 757 FDE for FS2004, should there arise a need for one ;).

We hope you will enjoy flying this baby !!


Kind regards,
Tero & Sebastian


delattrewga

New User
Member Since: Apr 2004
1 posts

Posted on:
Apr 22, 2004, 3:33 AM

Post #2 of 3 (1304 views)
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Re: 757 FDE version 3.0 released ! [In reply to teropa] Not logged in -   Reply 
Hello,

I finaly made it, and tried it, Had a great fun flying it
Neverthe I have a question that had probably been asked a thousand time, but can't find back the andswer in any forum:

The lowest ZFW that I can enter in the FMC is 180 klbs. How do I enter the 175 klbs for the 757 zfw?

Thanks for the help


teropa

User / Moderator
Member Since: Oct 2003
115 posts

Posted on:
Apr 22, 2004, 5:10 AM

Post #3 of 3 (1305 views)
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Re: 757 FDE version 3.0 released ! [In reply to delattrewga] Not logged in -   Reply 
Hi,

Please see the readme.txt that is in the package. All the details on FMC usage are explained there.

Briefly...

The problem is that 175 klbs (or 79.5t) isn't a "767 weight" so the FMC has to be fooled with different weights to yield right 757 speeds.

If you're using lbs as the measurement, 243-265 klbs will yield the correct Vref-speeds (+20,40,60,80) to set the speedbugs for takeoff (check that the APPROACH page shows the same Vref as the speed tables), but you have to manually adjust the V1 and of course the orange V2 bug for takeoff in the analogue airspeed indicator. Then you have to manually set ALL THREE of the FMC takeoff speeds, which are reflected on the Pegasus EADI. These speeds will always be wrong when you enter a ZFW that gives you a correct Vref and thus correct flap maneuvering speeds and speedbugs on the analogue ASI.

For landing a figure of 236 klbs for ZFW 90% of the time gives the correct Vref (provided you have the correct amount of reserve fuel left, ie. 3-4 metric tonnes (~ 8-9 klbs) ).

Please read the instructions in the readme, they cover this topic pretty well.

Happy landings!

kind regards,
Tero


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