About this file
Version 1.3 Changes:
-Fuel consumption / thrust / N1 adjustments to closer match real world performance tables.*
-Climb performance adjusted - aircraft more closely matches real world climb performance at MTOW
-Restored tail logo lights omitted from prior version.
-Engine starters now automatically disengage once the engines are running
-Reduced rudder authority with increasing dynamic pressure and further improvements to rudder input / response
-Updated / simplified pfd tape readout (override of the default cockpit.cfg)
-Updated Aircraft variation in aircraft.cfg; will assist users identifying version and installation.**
-Adjusted flap drag performance: reduction in drag coefficient.
-Adjusted g-limits to spec for the type
-Increased landing light and taxi light intensity and throw distance (optional install).***
*A kind benefactor provided me with Cessna Longitude test / calculated engine performance data sheets that I've used to reference fuel burn, climb performance, and N1 settings. Unfortunately, the underlying Asobo turbine engine modeling leaves a lot to be desired, but I’ve now spent a quite unreasonable amount of time working toward some more reasonable N1/thrust/fuel consumption figures that are much closer to the specs Cessna has tested and/or calculated, particularly at target cruise altitudes and ISA conditions. Annoyingly, and no matter what parameters I modify, the fuel burn in the cruise Mach range (0.78 to 0.84) is always significantly better at middle cruising altitudes (FL320 to FL390) than at higher altitudes (FL390 and above), definitely unlike the real-world aircraft, which really likes to be up above FL400 for best efficiency. It appears that the lapse rate for the turbine fuel consumption isn’t modeled correctly within the simulation code and doesn’t correctly follow the lapse rate in available thrust with increasing altitude (which is a little off, but manageable in cfg files). In MSFS2020, as turbine aircraft climb they lose thrust, as they should, but the fuel consumption doesn’t drop requisitely. So, the fuel burn parameters must either be adjusted to favor low altitude realism or high altitude realism - but not both. To get reasonable approximations, I’ve used some “fudge” factors that Asobo added to the engines configurations file and made numerous fine adjustments to several engine parameters and drag/lift parameters, and while those help get the modeling closer, they can still create some odd and unrealistic performance results. This is not surprising given that, as of V1.3 publish date, Asobo have not seemingly focused on turbine aircraft performance fidelity to the degree they have piston engine aircraft. Bottom line: I’ve tuned the engine performance specs to be reasonably close to Cessna’s IRL figures for cruise at FL400 to FL450 and above and for flying around in the pattern and below 10k feet. If anyone has found a magical coefficient somewhere in the engine.cfg file to properly model this fuel consumption lapse rate with altitude, please let me know!
**When Livery selections are made, the Longitude will display the following in the variant area "FDE Fix V1.3". This will help identify more quickly whether installation of the package was successful and quickly identify package version - this will only affect the default aircraft listing and not other liveries, although the performance modifications will be applied to all livery versions.
***Optional additional installation package increases the intensity and projection distance for the landing lights and taxi lights. This will affect any aircraft using the included files. Additionally, landing lights will no longer project light onto the cockpit floor. There is a known issue with the taxi lights for which a solution has not yet been found: if taxi lights are on while gear is up (stowed) the light will project strongly into the cockpit.
Cessna Citation Model 700 Longitude Performance and Flight Dynamics Modifications Project Comments:
After reading user comments on the forums regarding the Cessna Citation Longitude model from Asobo concerning inaccurate weights, fuel consumption, handling, etc... and due to my own poor experience and frustration with Asobo's starting efforts, I started work on revising a wide variety of parameters in the configuration files for the Cessna CJ4 model to match the specifications for the Longitude. I modified the default layout.json file for the Longitude to bypass the encrypted configuration files and point to copied versions of non-encrypted files from the CJ4. These files have all been heavily modified and with a fair amount of guesswork I've been able to produce a working version of the Longitude that is more docile in handling and produces performance numbers that much more closely match the real-world specs. I'm not a Longitude pilot, so my modifications are more by feel and based on comments on forum topics from those claiming to fly the type. Input from type-rated pilots with knowledge of the aircraft handling and envelope will always be greatly valued. My adjustments are generally focused on performance and handling. Any issues with the G5000 suite and avionics in general are not the subject of this modification. If Asobo chooses to decrypt the xml files associated with the type, a motivated person could presumably start modifying and improving the avionics suite much like has been done with the CJ4 and other un-encrypted aircraft.
I have modified a great many variables and parameters in the available configuration files. I would greatly appreciate feedback on handling, control sensitivies, or other performance related parameters from knowledgable sources so I can continue to improve and update these modifications. If I missed something or you find a performance "glitch" please let me know.
Open items for possible future versions:
-Further engine performance improvements (especially if Asobo improves turbine engine modeling).
-Takeoff thrust settings, when a/c not in motion, will quickly exceed the 950C ITT limit until the aircraft achieves significant forward velocity: No solution identified at this time.
-Autopilot roll / bank control is still sluggish - haven't found a solution yet and this may affect precision approaches.
-Further refinements to handling and flight envelope modeling - further testing and tweaking could get it closer.
Significant avionics issues (there are many more, but these are commonly noted) that I don't have file access to address, but maybe someday...
-A/P max thrust authothrottle N1% limit. Could not solve using current file access.
-FLC MACH bug - FLC does not properly adjust Mach setting as aircraft climbs. This made testing of climb performance tricky!
-Disable or modify gear warning indicator when not appropriate. Could not solve using current file access
-Gallons fuel remaining displayed on MFD vs. pounds (or kilograms)-Auto-ground spoilers should set to Norm by default (instead of disarm)
-Cabin altitude is incorrect (too high) at high alt.
Download the .zip file and extract to desktop or other location of choice.
See included Install_ReadmeV1.3.txt file for further instructions and version notes.
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© dakfly0219 - All rights reserved. Any reupload or redistribution of this file without the author's prior written consent is forbidden.
This Flight Simulator 2020 Mod was created by dakfly0219 and shared in Third Party » Aircraft for Flight Simulator 2020.
Download for free and enhance your experience in MSFS 2020.
I guess thats nothing a third-party could make, since its some core-sim functionality.
I think its time for a section "working on". It would be so good to see if anyone is actually working on something particular, to avoid multiple people doing the same thing. There is this request section on flightsim.to which is awesome, however, I suggest a supplementary section, where people can actually upload their WIP.
why no one is making a replay mode
sorry for question but...how can download the wallpapers?
Would it be a lot of trouble putting the version number in the My Uploads page?
Bring back the 48hrs Recent Activity drop down please!
You'll probably find it now under Featured -> This Days Best
That was quick with the version number. Thanks, you're doing an awesome job with this site!
t jemand TNCM für MSFS
can we have WAP livery
Jak a kam stáhnout České památky. Prosím odkaz na nápovědu. Děkuji