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Heffron

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Posts posted by Heffron

  2. Posted

    1 hour ago, windshearDK said:

    wow interesting thank you! But usually when you turn on the hydraulic systems you put 1 or 2 in AUX and not on... Is it the right to left logic with simply some in the AUX position

    This procedure was for the 777. For the 747, during the Before Start Procedure, you would put HYD 4 in AUX first, then 3, 2, and 1 in AUTO. Or if the aircraft is equipped with an auxiliary pump on system 1 and 4 it would be 4 to AUX, then 1 to AUX then 3 and 2 to AUTO. For shutdown you would put selectors 1, 2 and 3 in OFF and 4 in AUX. When the chocks are in place you can release the parking brake and then also select 4 to OFF. Or else, if parking brake will remain set you would keep 4 in AUX for 30 seconds after parking brake set, and then select #4 to off, to prevent excessive pump wear.

    • Like 1

  4. Posted · Edited by Heffron

    2 hours ago, xkoote said:

    At 5:03 in the video you see that he has the AUX pumps in SYS 1&4 ON. That is not representative of the picture above. FCOM also says that these are electrical and used for ground handling operations, of which this clearly is. The fact that he used 2 and 4 might come down to personal preference, specific company maintenance policy or even cycles on the No. 1 engine. Who knows, but with the AUX pumps on, the requirement of which engines to use becomes moot. He even has HYD SYS 2 pump switch to OFF. It also appears as if he is describing rotor bowing to the filmer. Interesting stuff...

    In the video i believe, during taxiing, the pumps are configured all in AUTO except HYD 3, which is set to OFF. AUX 1 and 4 were only on during the engine start, if i remember correctly from the video. The EICAS HYD synoptic shows the same as in my picture (around 5:26 in the video). So both AUX pumps are not running during movement of the aircraft (assuming it is taxiing under its own power.) 

  7. Posted

    18 hours ago, windshearDK said:

    but you don't have the same 4 hydraulic systems like in the T7... How do you then turn them on to prevent spill?

    Correct, you have the Left and Right system, but with multiple pumps. You generally pressurize the right system first before pressurizing the left system. The procedure i am familiar with is:

    1. Right Electric Demand pump to AUTO, make sure FAULT light extinguishes.

    2.Switch center 1 and 2 electric primary pumps to ON. Center 2 FAULT light may stay illuminated due to load shedding.

    3. Left Electric Demand pump to AUTO, again make sure FAULT light extinguishes

    4. Switch Center 1 and 2 Air Demand pumps to AUTO and verify FAULT light extinguishes.

     

    For shutdown it's exactly the other way round, depressurizing the right system last.

  10. Posted · Edited by Heffron
    actually watched quoted video.

    I think they had HYD 1 on the electrically powered AUX pump, which provides hydraulic pressure without ENG 1 running.

     

    EDIT: I actually watched the video now, so my initial reply is kind of false i guess. I guess the #1 Demand Pump is running on bleed air from either the APU or the 2 running engines. 

  13. Posted

    11 minutes ago, cavaricooper said:

    This is my most used livery..

    9X1HNwZ.jpg

    What will your's be?

    I for one, am very much looking forward to the release. In so many ways the PMDG 747-8 is like the real thing... an incremental series of small improvements, which put together result in something much bigger than what we started with.  Familiar, yet stunningly different- an intoxicating combination, which will only solidify your love affair with this airframe.  Once again, PMDG have knocked it for a six.

    God Speed!

    C

     

    Atlas Air and Polar Air Cargo, which is what i solely fly on the -400 😊

  17. Posted

    On 8/3/2018 at 4:32 AM, JRBarrett said:

    It is possible to configure the radar so that the pilot and copilot displays are using different tilt angles. In that mode of operation the two displays only sweep in a single direction - i.e. the pilot display would only sweep left to right, and the copilot display would only sweep right to left.

    Interesting! Is this modeled in the PMDG? Let's find out when I get home.

    Tested my wxr yesterday, 1 second intervals between sweeps with same tilt/gain for left and right.

  24. Posted

    On 30-11-2017 at 5:03 AM, SaenchaySor said:

    Hello.

    Ive looked forever now and could not come up with something. Sorry if got asked or requested already. 

    Can someone please please either lead me to, or maybe even make a livery for a Thai Airways Cargo 747BCF for the new QOTS 2. Something like a HS-TGH or others of this kind of livery.

    Like here in the google search

    I saw one old ones for the qots 1 but they dont seem to work. 

    I would be forever thankful.

     

    I'll see if i have time to do it if you still need it.

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