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PA-28 Warrior II Eratic Control

Scheduled Pinned Locked Moved PA-28 Warrior II
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  • H Offline
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    Hombrae369
    wrote on last edited by
    #9

    Mark,

    I really appreciate the input and will check out your suggestion when I get home form work today.

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  • D Offline
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    Delta558 Developer
    wrote on last edited by
    #10

    I have just taken the current public release version up for a quick circuit. Some points to consider after checking Mark's suggestions above:

    The Warrior's stall speed in landing config is 38kts.
    Obviously, pitching effect decreases with airspeed but that is balanced to an extent by propwash over the tail.
    I adjusted my trim once airborne from level with the white mark to the position shown in the pic (just aft of centre, so not at all extreme) and kept it there throughout the circuit and landing:
    Capture.JPG

    1. On the take-off run, I pulled the yoke fully aft to see at what point the stabilator became active and was getting clear pitching movement by about 15kts.
    2. At 35kts I had enough pitch authority to be able to dig the tail into the ground, though the aircraft would not lift off (below stall speed).
    3. The stall warning horn sounds well before the actual stall, so . . .
    4. On the approach, I was able to hold the nose up with about half aft travel on the yoke as the speed bled through the horn regime and only when the aircraft actually began to stall was I using full aft on the yoke.

    If you are seeing anything different to that, then there is something else which is causing your problem and we will need to work that out.
    I hope that helps.

    Just Flight FDE developer

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    Delta558 Developer
    wrote on last edited by Delta558
    #11

    Having re-read the thread and seeing your concerns with Craig's video, here is a video to back up my assertions above. I have taken it to wide angle so that the yoke is constantly in view and I repeatedly look to the trim to demonstrate that it is constant (I move it once, after take off so that it corresponds with the description in my previous post).

    It's very 'rough and ready', a quick circuit, apologies for my flying and tug-pilot landing!

    https://drive.google.com/file/d/1_zpdml7F5vSl5qO2623pPflmamR5Hg0j/view?usp=drive_link

    Notice that touchdown occurs around 40kts, so just above stall speed.

    Just Flight FDE developer

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    jmarkows
    replied to Delta558 on last edited by
    #12

    @Delta558 said in PA-28 Warrior II Eratic Control:

    Having re-read the thread and seeing your concerns with Craig's video, here is a video to back up my assertions above. I have taken it to wide angle so that the yoke is constantly in view and I repeatedly look to the trim to demonstrate that it is constant (I move it once, after take off so that it corresponds with the description in my previous post).

    It's very 'rough and ready', a quick circuit, apologies for my flying and tug-pilot landing!

    https://drive.google.com/file/d/1_zpdml7F5vSl5qO2623pPflmamR5Hg0j/view?usp=drive_link

    Notice that touchdown occurs around 40kts, so just above stall speed.

    If I might steal your attention, have you looked at the Better Flight Model topic re: ground handling with crosswinds?

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  • D Offline
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    Delta558 Developer
    replied to jmarkows on last edited by
    #13

    @jmarkows Yes, I have. Rather handily, we are in the middle of a storm here in the West of the UK so I have just recorded a couple of videos using live weather and the Warrior. The nearest METAR (EGOV) is on the screen throughout the videos.

    Video 1 - EGOQ, Mona - 34kt wind at 190, runway heading 22, crosswind component 17kts which is coincidentally the maximum demonstrated for the Warrior:
    https://drive.google.com/file/d/1dYZL5ABpHAYZAkN_TXRW0WVODmaBcBW7/view?usp=sharing

    Video 2 - EGOV, Valley - 38kt wind gusting to 48kt at190, runway heading 130, crosswind component 33kts gusting to 41 kts:
    https://drive.google.com/file/d/1LEZ_1PSkIqmnc6rze2tQ4iHUhM1MXF4E/view?usp=sharing

    In both videos I hold the aircraft on the ground way past Vr, even accelerating it to 90kts. The second video isn't pretty (with some definite wing scrapes in there) but the basic crosswind before any gusts is double the stated maximum.

    (I wasn't going to include this vid, because the crosswind component is a bit under the max and I only put the METAR up at the end but I actually took the aircraft on the runway to between 100 and 110kts without any extreme behaviour - https://drive.google.com/file/d/1yBlfK7ju403iFkuojK0Bzz2miaBKVMgz/view?usp=sharing )

    I really don't know what more can be done - we already know that MSFS has an 'issue' with crosswind / ground transition to airborne. In all instances above not only would I not be flying in the real world but the Warrior remained on the runway, controllable and not demonstrating any extreme or unexpected behaviours up to more than double the demonstrated crosswind limit.

    Just Flight FDE developer

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    jmarkows
    wrote on last edited by jmarkows
    #14

    That's definitely not what I'm seeing, I'm seeing sharp yawing into the wind suddenly at around 40knots and have to play a very touchy dance on the rudder pedals.

    It's given me some food for thought though.

    Thanks.

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    RoosTa
    wrote on last edited by
    #15
    This post is deleted!
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    CodeGlider
    wrote on last edited by
    #16

    Hi everyone, I am having the same issue. On the flare I barely get any elevator authority and end up slamming the plane on the runway. I fly the Warrior regularly and thankfully the real airplane does not act this way. I have a suspicion that the model is trying to emulate the degradation in elevator authority when the throttle is idle (in real life the lesser airflow from the propeller stream yields lesser elevator control) but this effect is way exaggerated in the model. Is there any way to compensate for this? Thanks for the suggestions.

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    CodeGlider
    wrote on last edited by
    #17

    @Derek @Delta558 Hi folks, any comments on the above?

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  • D Offline
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    Delta558 Developer
    wrote on last edited by Delta558
    #18

    I've just taken the current version, freshly downloaded from the site, for a circuit. I deliberately did not trim at all through the flight so it's not a case of 'it has to be correctly trimmed' as you sometimes see with sim aircraft. Able to lift the nosewheel at around 25-30 kts under power, and on the approach / flare with full flap I was comfortably able to make the rear fuselage touch down before the mainwheels using full aft stick but being a bit more sensible could flare perfectly well and maintain a nose-high attitude down again to 30kts.

    If you are seeing different to that, the only things I can suggest are 1) check you're on the latest version. 2) are your controller curves linear, as recommended?

    Just Flight FDE developer

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