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kevinh

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Posts posted by kevinh

    Cabin Pressurisation system: very slow cabin altitude rate (all versions up to 1.07)

    in Systems

    Posted · Edited by kevinh

    Cabin altitude should change at a rate that equal to the cabin vertical speed. It is far slower than that and so cabin altitude is usually well behind the commanded cabin altitude. This has been a problem since initial release of the A350.

    In a steady managed climb the Cabin VSI shows 400 ft/min, which is a reasonable value. However the indicated cabin altitude only climbs at 100 ft/min, 25% of the rate it should be. This means that as you get close to cruise altitude the cabin altitude is far too low and cabin differential pressure is in the amber or red range, which should never happen under normal conditions.

    On my last flight, as I reached cruise level (FL390) the cabin altitude was still only 3,340 ft (6,000ft being the commanded cabin altitude), cabin diff press was 10.2 psi and it took over 24 minutes for the cabin altitude to finally reach 6,000 ft.

    During descent, with cabin vertical speed stabilised at the commanded rate of -250 ft/min, the cabin altitude rate was -75 ft/min. Thats 30% of the value it should be.

    Kev

     

    D-ATIS often does not find the ATIS.

    in Systems

    Posted · Edited by kevinh

    I usually fly offline. I don't have a Hoppie account as I don't use it often enough, so it lapses. It seems D-ATIS is unavailable in this situation. It would be really useful if, after importing the OFP from Simbrief, the DEP and ARR METAR were displayed in the EFB, such as on the FLT OPS STS page.

    A350 first flight - Discovered ISSUES so far [MSFS2020]

    in Other

    Posted

    3 hours ago, Alvariteus said:

    Other bug I found for the team of iniBuilds to solve asap. In this case in the A350-1000.

    [FLIGHT CONTROLS]

    - The plane does not turn on ground, having all well configured, and with the gear showing like it's turning. The plane, however, goes straight and it was not possible to solve it, so a good flight that wasruined and a lot of time wasted in its preparation. Photo is attached. This one is so far the most frustrating bug and the first one that produces me a no-go.

     

    It sounds like the nosewheel is skidding (applying too much tiller angle before the turn rate builds up). Taxying in MSFS isn't great (it's improved a lot in FS24 apparently). You must make tiller inputs slowly or the nosewheel will skid. Only make tight turns with GS less than 10 knots.

    Nosewheel skidding will happen in a real airliner if you apply too much tiller too quickly. So this is a realistic effect and you need to keep tiller inputs slow and only increase the tiller as the turn rate builds up. I find setting reactivity to 0 in the tiller axis helps as it responds slower.

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