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cmbaviator

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Posts posted by cmbaviator

  1. Hello,

     

    Since V1.51, the nose is less nose heavy when passing below 50ft RA which is a relief :). However after retarding the throttle, 3/4 of back pressure is still not enough to maitain the pitch during the flare, my pitch attitude dropped at 2.5° instead of the 3.5° approx which result in a firmer touch down.

    do you need 3/4 to full back pressure on the yoke to maintain pitch during the flare ??

     

    landing at 20:15

     

  2. Hi

    I know there is a dead band during rotation when reaching the 10° of pitch attitude but it seems overdone as you need lots of back pressure to increase the pitch attitude which seems not right.

    Besides during flare, the nose is becomming very very heavy below 30 feets ( without retarding the throttles ) and like there is no internia : you barely release the back pressure that the nose goes down with a very high pitch rate

    anyone having the same feeling?

  3. On 1/17/2022 at 10:41 AM, IMatAMS said:

    I had the same yesterday, filled it with Alt+Finres as usual in the 737, and it started moaning at me for below reserve fuel at Alternate. changed the reserve to Finres only, and that seemed to work OK, but not sure if that is SOP.

     

     

    i think so if you put press on the MFD data on the FMS, you will see that in the challenger, the reserve fuel is the reserve fuel AFTER diverting to the alternate so i'm almost sure you need to enter just the final reserve which is around 400kgs for the cl600. so now in the default fms setting, i put 400kg as reserve

  4. Hello gents,

     

    I was wondering what value you should put in the reserve value in PERF menu page 3?

    Because it seems to be different from airliners like A320/737.. where RSV = Final RSV + ALTN. In the chalenger, the Reserve seems to be the reserve needed after diverting to ATLN so that means we shiould only enter the final reserve value ? Each time i have Check ATLN Reserve message when enterting Final RSV + ATLN in the reserve field 
    image.thumb.png.aa615d32337ccf937f9873642dc66a97.png
     

  5. Hi Graeme,

     

    The more landing i do the worst they are getting. I bounced almost at every landing even on firm / positive landing.

    I am for VREF +7 and making sure that the AoA is 0.6 max.

     

     

     

    However on release, during my landing trainning, i never bounced, it feels like the ground effect has changed in between

     

     

  6. 25 minutes ago, Litjan said:

    Hmm, no idea what you did there. Our plane should run fine with the Zibo mod installed as well - or we would have heard about it before.

    To troubleshoot I would try removing all other plugins - the ultimate solution is to delete the whole X-Plane folder and reinstall it from scratch, then install the IXEG.

    Cheers, Jan

     

     

    i've found the cultprit, it was the plugin xlua but i haven't had any script, so check the script folder of xlua and I found this :

     

    as you can see, the first time i installed the Zibo script in the wrong folder (lelft), the right one being the correct one

    image.thumb.png.cb40942ea6d8fcac4ac0a4af0702977a.png

    that was causing all the other aircraft to be broken

     

     

     

    I will now delete all the videos ;)

     

    thank you for your help

    • Like 1
  7. 1 minute ago, Litjan said:

    Hmm, no idea what you did there. Our plane should run fine with the Zibo mod installed as well - or we would have heard about it before.

    To troubleshoot I would try removing all other plugins - the ultimate solution is to delete the whole X-Plane folder and reinstall it from scratch, then install the IXEG.

    Cheers, Jan

     

    i hoped to avoid an reinstallation from scratch. The thing is aldo that my A300 inibuilds is broken as well but only the ZIBO is working fine so its weird

  8. After installing and unistalling several time, my 733 v1.33 is broken, idea how to fix it ?
     
    can't modify the ZFW, keeps going back to the EOW, knob like heading can't be changed....... all seems to occured after installing the ZIBO mode but even after several uninstalls ands reinstalls, still the same issue (GIZMO stable version chosen each time)
     
     
  9. On 5/24/2020 at 3:47 AM, dagauy said:

    I have to congratulate you guys for this outstanding work, i was really surprised for the flight model.

    In real life i fly 700s and 800s and always i found the 300 very close to the 700 on the flight characteristics, not the performance obviously.

    The new flight model is very accurate, really is

    For example after take off i needed to apply rudder trim to compensate and put that Yoke arrow centered again, was there when my mind blows.

    i am really happy with this plane, i gonna test more this bird .

    Just dont forget to udpate the FMC, i really need to know how much fuel i gonna have at my arrival hehehe.

    Cheers guys

    
    
     

    what would you need to apply rudder trim if there is ,no engine or flight control failure ?  i've watched hundred of videos if not more on the B737 and ihave yet see the PF used rudder trim after take off ?

  10. 3 minutes ago, Morten said:

    On the contrary, lift increase starts at about one CHORD altitude were you need ease off on back pressure (after the flare/break).  Pitch down effect starts about 70' agl.  We have analyzed dozen's of real B733 landings based on real FDR data.  Attach a sample of a few real B733 landings for you. As Jan says, we  had these discussions with Austin many times and provided various documentation.

    So the combination of science, real data, NASA test data and Jan's extensive in type flying experience has given us the result we have today which is the best for any desktop sim.

    Skjermbilde 2020-05-25 kl. 19.30.33.png

    Now we're talking lmao. I don't quite understand how you can determine the area of pitching moment change in ground flare based on these figures, could elaborate for me please :)

    these were all kiss landing, almost all were <-100 on touch down !

  11. 21 minutes ago, Litjan said:

    Ah, ok - I see the weights.

    .72 is slow for a 737 in cruise - the pitch seems appropriate. Not sure what cost index you used. Note that the optimum altitude indicated is purely a function of weight, not of speed (which means you probably fly too high for the slow speed calculated by the FMS).

    The "green dot" denotes the optimum L/D speed with engines running, the top of the yellow bar will include a MACH buffet margin, so at high altitudes it will be "higher" than the green dot.

    And - as Morten pointed out - if you have a "far forward" center of gravity, the tail has to push down hard to keep the plane level. This extra "push down" needs to be balanced by the wings, so they need more "nose up" to create the necessary lift. The saying is "As a rule - aft trim saves fuel" ;)

    Cheers, Jan

     

    thanks for the input :)

     

    i'm using CI35, would you mind telling me what CI LH used back in the day for the 733 ?? :P

     

    L/D ? I've flying the A320 (fslabs) the last couples of years haha, the green dot will always been put above the Vls even if the calculated one initially was lower than VLs I think.

    this is what confirmed it for me.

     

    The image below shiws the PFD of the A321 at FL370 with a GW of 67t prior to TOD

    67.0 is quite light for an A321 so having a GD speed close to 250 kts at 67tons is very odd but I was explained that because the VLS was so high that the GD speed was just recalculated to be above Vls (margin) because normally at 67t, the GD speed in an A321 in cruise should be around 230kt ( in the fslabs at least).

    Even though he must have been cruising near the rec max, i still don't understand how it's possible to have a Vls that high unless the aicraft is actually heavier than the data inserted in the MCDU

     

    image.png.a32709ac8990d6add833067f7be88656.png

     

     

    I've tried to reproduce that with the fslabs with the A321 at GW 70ish and being just 500ft below REC MAX and I couldn't the VLS being that high 

    image.thumb.png.8b93f0a32e023a991705d5af71fac320.png

     

    sorry for the slight off topic haha

  12. 7 minutes ago, Litjan said:

    I am bowing out of the discussion, but by all means feel free to discuss this here - I think it is a vital and fun part of our hobby! :)

    Everyone has their own opinion, ask 10 long-time pilots of how the 737 lands, and you will get 11 answers. I am happy with the model we have.

    Cheers, Jan

    agreed but does really the nose drop starting from 60 feets ? i was thinking more in the 30 feets area

  13. 18 minutes ago, ZeeMuffenMan said:

    I was just comparing it to available 737-3 landing footage (watching both pitch on PFD & elevator input from the crew) as it seems that the IXEG in XP11 doesn't handle as nicely as it did back in XP10...it seems like I don't need to add much back pressure anymore at around 15-10ft, where the real 733 would start to require a lot of back pressure, as that nose wants to dive due to loss of lift, of course even more so when you get closer to the ground. (I do believe it's more down to XP11's new ground effect - which if you do ask around, wasn't all that of an "improvement" compared to XP10; people also forget that a loss of momentum will cause the nose to pitch down too, but that's not due to ground effect).

    could also depends on speed management, for example if at 50ft the pilot is at Vapp- 2kt and a VS of -800/-900, he would need lots backpressure during flare comared to being at Vapp +5 kts and a V/S of -600

    flare starts at 53:45, you can see that he gives little back pressure and still manage to make a kiss landing

    He generated a float with not that much back pressure

     

  14. 11 minutes ago, ZeeMuffenMan said:

    I was just comparing it to available 737-3 landing footage (watching both pitch on PFD & elevator input from the crew) as it seems that the IXEG in XP11 doesn't handle as nicely as it did back in XP10...it seems like I don't need to add much back pressure anymore at around 15-10ft, where the real 733 would start to require a lot of back pressure, as that nose wants to dive due to loss of lift, of course even more so when you get closer to the ground. (I do believe it's more down to XP11's new ground effect - which if you do ask around, wasn't all that of an "improvement" compared to XP10; people also forget that a loss of momentum will cause the nose to pitch down too, but that's not due to ground effect).

    would you mind sending me those video links ?

  15. i beg to differ, in XP10, the ground effect killing the V/S was a bit exagerated and the nose down (nose heavier) when entering ground effect was absent which is not realistic

    now at 50 feet, you really feel the nose dropping and the need to add more back pressure.

     

    XP10 might feelt better for you but it's a bit less realisticI think, maybe @Litjan can shed some light on the matter

  16. Hi guys,

     

    thnaks for the update :)

    I did notice that the pitch attitude seems quite hight during cruise, was wondering if its normal or due maybe to "experimental FM" ?

    Also why is the GD speed below Vls ? Almost 5° in the screen below

    Both screen ZFWCG was 14.9

     

    GW: 51.5

    image.thumb.png.be760adebbef465cffa84623fafa7e49.png

     

     

    here is a bit less (around 3°) and seems a bit more realistic

    GW 48.5

    image.thumb.png.e05059075d8daf9d2c976afbf4d99737.png

     

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