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Staffan

Calculating takeoff speeds?

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Hi,GREAT product once again!! ;-)I have a couple of problems though with the FMC setup.1. In the manual it says that the FMC should calculate the correct V speed for take off automatically,...but so far in no situation the FMC calculates any V speeds. What did I do wrong here?2. I can not find anywhere in the manual how to obtain the flex value.I am using flightplans I copied from the PMDG Flightplans folder in FS9.

Staffan[/font size]

http://www.scandicair.com/images/banner_sa_2008_s.gifFlightsimmer since 1987Intel Core 2 Duo E8600 3,33GHz FSB 1333MHz LGA775, Asus P5Q Intel P45 ATX DDR2 PC6400 800MHz 4096MB, Asus Nvidia Geforce 9800GTX+ 512MB DirectX 9.0c, W XP Home with SP3, E171FPb Flat panel monitor 17"Samsung 750GB SATA HDD 8MB, Samsung 250GB ATA , Maxtor 120GB ATA, All 7200rpmLacie 250Gb Extern HD, Cooler Master ATX Chassis, 550W Power supplyBlogg: http://blogg.passagen.se/primeaviFiles: http://library.avsim.net/search.php?CatID=...&Go=Change+View

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Staffan:1. Are you ensuring that your TOWCG, ZFWCG, ZFW, Block Fuel, TOW are input in the FMC init page? I suspect that it will not calculate V speeds until it has that data to crossreference, also, you will need a flap setting. I suggest that 25 will work in most situations (based on feedback from other users, in other topics here)2. The Perf Data in the Manual is very very limited as Boeing are not willing to permit PMDG to release all the required data to enable us as the users to successfully plan our flights from start to finish. There is little to nothing PMDG can do about this, other than wait for Boeing to stop being so paranoid and just do the kind thing and release the data.A Flex value of 30-40C should see you through most takeoff's however and 30C has worked okay for me on the last few flights.3. FS9 Flight plans should be fine. It's reading my FSBuild FP Exports quite happily.CheersPaul

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Thanks PaulYes, I think that the INIT page is as full as it can be. I will check that again and try to change the flap settings to see if something changes.Ok, so there is not an exact procedure so far for the flex temperature? Will try to use the 30c value.

Staffan[/font size]

http://www.scandicair.com/images/banner_sa_2008_s.gifFlightsimmer since 1987Intel Core 2 Duo E8600 3,33GHz FSB 1333MHz LGA775, Asus P5Q Intel P45 ATX DDR2 PC6400 800MHz 4096MB, Asus Nvidia Geforce 9800GTX+ 512MB DirectX 9.0c, W XP Home with SP3, E171FPb Flat panel monitor 17"Samsung 750GB SATA HDD 8MB, Samsung 250GB ATA , Maxtor 120GB ATA, All 7200rpmLacie 250Gb Extern HD, Cooler Master ATX Chassis, 550W Power supplyBlogg: http://blogg.passagen.se/primeaviFiles: http://library.avsim.net/search.php?CatID=...&Go=Change+View

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>Are you inputting the slope/wind values? If not you won't get>V speedsHi,I should just write about what solved the problem, when I saw you suggestion. Infact it was the slope/wind values that I for some reason had neglected. :-)

Staffan[/font size]

http://www.scandicair.com/images/banner_sa_2008_s.gifFlightsimmer since 1987Intel Core 2 Duo E8600 3,33GHz FSB 1333MHz LGA775, Asus P5Q Intel P45 ATX DDR2 PC6400 800MHz 4096MB, Asus Nvidia Geforce 9800GTX+ 512MB DirectX 9.0c, W XP Home with SP3, E171FPb Flat panel monitor 17"Samsung 750GB SATA HDD 8MB, Samsung 250GB ATA , Maxtor 120GB ATA, All 7200rpmLacie 250Gb Extern HD, Cooler Master ATX Chassis, 550W Power supplyBlogg: http://blogg.passagen.se/primeaviFiles: http://library.avsim.net/search.php?CatID=...&Go=Change+View

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>Infact it was the slope/wind values that I for>some reason had neglected. :-)I did the exact same thing the first time I tried the MD-11 out. :)

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