Post any IFDG 757 v2 questions or issues that you think should be looked into by the guys in this thread.Full Details of the event can be found here:http://ftp.avsim.com/cgi-bin/dcforum/dcboa...ewmode=threadedI will start the ball rolling:1:VNAV Climb below 10000ft on the SID Intermediate Level off given by either ATC or commanded by the SID procedure. IE Aircraft is levelled off below 10000ft at 250knots.VNAV is engaged.Climb issued by ATC, or SID restriction has been lifted, engines start spool up to climb thrust setting, after being at low power setting to maintain the 250 knots speed restriction.VNAV commands climb to new cleared level.Aircraft busts 250 below 10 rule because of the large power setting change.Anyone else notice this. Solution use FLCH below FL100 when using the 757 with the 767 PIC panel 2:Weak Nose Gear Using the default FS pushback facility, the aircaft nose gear slams down quite abruptly when the is stopped. The crash sound is also heard, although nothing actually happens.When Taxiing the 757 builds up speed quite rapidly. Sometimes applying the brakes can cause the nose gear to collapse. Post any other issues that you think should be looked at for a differences operating procedure for the 757 to be developed.We already know that the 757 is extremely slippy in the descent below FL100, and is slow to bleed the speed off.Mark

Mark,Great post! I was so busy this afternoon, I did not see this until I landed at LaPaz. Lets let this spill over to the Sunday event in Europe. I might even try the 757 myself on the first leg. My main concern is the MANY variations in performance from one variant to the other. My AAL version differs greatly from many of the models that others have posted about.A second concern is a valid reference for ZFW entry in the FMC. We really need tables with dummy ZFWs for take-off and for landing based on real gross weights. I doubt that the "MANY variations" should be an issue for this, but we may need to keep it in mind.Fuel burn is the other big issue. I can (and have) created a FSBuild flight plan for the 767PIC that very closely nails the taxi, climb, cruise, and decent fuel burn. But to do this for the 757 is not so easy because of the "MANY variations" problem.As you can see, these remarks tie back to the need to standardize the performance charicteristics so that each aircraft clearly falls into one of perhaps three different classes. If there were sets of performance files (.AIR and aircraft.cfg) that were available as downloads (patches if you want to call them that) so that we could get to a point where we knew what we had, then tables could be created for fuel burn, rates of climb, etc.

Mike-Maybe these charts will help someone out there, in designing a better FS 757-200 (the data below is RB211-E4 engines in LBS) flt perf file, FDE?This chart is the PITCH+POWER+PERFORMANCE chart used when the Pitot system goes inop and the Airspeed indicator becomes inop, I find this chart helpful in validating performance models...As it shows what type of Speeds and Vertical speeds one wud expect at certain Power settings and Pitch attitudes...http://195.35.145.44/marcbrodbeck/docs/b757/757FWRA.jpgCruise table for Long Range Cruise...Fuel Flows per engine in LBS.http://195.35.145.44/marcbrodbeck/docs/b757/757RB-CRZ.JPGDescent (vertical speed) performance for 757-200-300 w/ and w/out Speedbrakes deployed.http://195.35.145.44/marcbrodbeck/docs/b757/757RB-DSC.JPG

I notice that on my 757's when on push back I go to stop and the tail hits the ground and the nose gear slams back into the ground almost like it is really heavy in the tail end.Brian

Mike,I have tested the 757 some more on Vatsim.I have come to the decision to stick to the 767 from now on.The aircraft has a very low idle setting in the descent below FL100 and is tricky to keep to assigned speeds.Flew a couple of holds, and experienced some problems as well.I will stick with the 767 as I know it nails all of these.Mark

I understand exactly where you are comming from Mark. I am not quite ready to give it up myself but the amount of fudging is on the border line of my patience for sure. A lot depends on the particular variant you are flying.

The thing that's bugging me with the IFDG 757 and PIC panel is the fact that I can't seem to engage localizers or glideslopes with it. The LOC and G/S indicators on the EADI don't show up when I'm on intercept heading or in range or whatever. This means the LOC and APP buttons don't work on the MCP. And before anyone asks, yes, I do have the correct frequency in NAV1 and the correct heading in the OBS/CRS.Is anyone else having this problem?Any help is appreciated! :-waveJohn/AFG

Ihave not noticed that only because i have been doing manual landings ....NICE WEATHER..One thing i would like to know is is there a way to make the plane just a little less slippery by making changes in the aircraft cfg.Not much fun if you have to use the speed brakes most of the time.IS THE REAL 757 LIKE THAT ALSO ?

>Ihave not noticed that only because i have been doing manual >landings ....NICE WEATHER..One thing i would like to know is >is there a way to make the plane just a little less >slippery by making changes in the aircraft cfg.Not much fun >if you have to use the speed brakes most of the time.IS THE >REAL 757 LIKE THAT ALSO ? If you look at my charts above, yes, the B757 is slick, and Speed brakes are nrml.At 250kts the nrml IDLE/CLEAN descent rate is 1500fpm. Check what yur FS2002 version is doing, mine is pretty close, may need just a touch more drag added.Marc

Marc,Which version are you using? I would like to download it and see how it compares to mine. And thanks for posting the charts.For those who do not know Marc, he really knows his stuff concerning flight planning and performance. It would be a mistake to challenge his opinions. I have had the great pleasure of learning from him on the FSBuild project.

>Marc, >Which version are you using? I would like to download it >and see how it compares to mine.Idle thrust and some speed brakes are needed to keep a normal 300ft/nm descent profile from FL to Final Appr, I'm getting about 1200fpm at flt idle/250kias descent with this IFDG model. So, just a bit more tweaking to get that 1500fpm descent rate (per the normal dsc rates for the real 757) going.If all else fails you can go dirty early and drop flaps15/gear.Using the Transavia bird located in the AVSIM lib: ifdg752_transavia.zipBelow is a great website called www.smartcockpit.comlots of useful info on flying the 767. Here is the nrml descent profile for the 767-300.http://www.smartcockpit.com/b767/DESCENT%20PROFILE.PDFCheers,Marc