PMDG 747 Derate / Rwy Calculation

[jordanal 70]

I've been thoroughly enjoying all the TRC's and the advanced-tutorial recently published for the 747. My question is, if I want to use a specific derate such as the 5 or 15% defaults, how can I tell if the assigned runway is going to be long enough, especially at high TOW? I couldn't find a chart in the manual to address this. Is there a thumb-rule or trick to address this?Thanks...AL | KCHS - Charleston AFB/Intl | USAF 437AW (~53 C-17's)FS9/Game Rig:AMD64-4000+ SanDiego OC=210/420/2520 | Asus A8N-SLI Deluxe | Corsair TwinX2048-3200C2PT (2x1GB) 2.5-3-3-8/1T@2.8v | Evga NV 7900GT v84.56 (1280x1024x32/4xAA/16xAF/High-Quality) | Enermax 550W PSU | Thermalright XP-120(mm) HSF | NV 1GB LAN | NV SATA-I Raid-0 223GB (3x80GB Samsung) (WinXPx64/Games) | NV SATA-II WD 320GB (Backups) | IDE-0 80GB Samsung (Archive) | Realtek AC'97 5.1 Surround | CH Yoke, TQ, & Pedals | FS9.1 (Settings max'd/60-40Vis/No-Shadows/20FPS) | WideFS v6.16 | FSUIPC v3.617 | FSGenesis Mesh (All) | PMDG (All) | PAI (All) | FSBuild2 | Etc...FS9 Support Rig:AMD3200+ | Gigabyte GA-7NNXP | Leadtek NV 5900 | Corsair TwinX1024-3200 (2x512MB) | Intel 1GB LAN | SiI3112 SATA-I 80GB Samsung | IDE-0 80GB IBM | JustCom 4port KVM | FS Wide Client | ActiveSky v6 (512x512x32bit / Wx Influanced)| Radar Contact v4.01 | FS Real Time | FS Flight Keeper | FS Commander | AI Smooth

[jordanal 70]

Edit:OK, I just found the derate charts in the manual for each of the possible flap settings, so I guess my real question is not derate specific, but how do I know if a given runway is long enough given my TOW and current takeoff parameters set in the FMC. For example, a high V2 such 180kts requires a minumum runway lenght of what, 10,000 feet? AL | KCHS - Charleston AFB/Intl | USAF 437AW (~53 C-17's)FS9/Game Rig:AMD64-4000+ SanDiego OC=210/420/2520 | Asus A8N-SLI Deluxe | Corsair TwinX2048-3200C2PT (2x1GB) 2.5-3-3-8/1T@2.8v | Evga NV 7900GT v84.56 (1280x1024x32/4xAA/16xAF/High-Quality) | Enermax 550W PSU | Thermalright XP-120(mm) HSF | NV 1GB LAN | NV SATA-I Raid-0 223GB (3x80GB Samsung) (WinXPx64/Games) | NV SATA-II WD 320GB (Backups) | IDE-0 80GB Samsung (Archive) | Realtek AC'97 5.1 Surround | CH Yoke, TQ, & Pedals | FS9.1 (Settings max'd/60-40Vis/No-Shadows/20FPS) | WideFS v6.16 | FSUIPC v3.617 | FSGenesis Mesh (All) | PMDG (All) | PAI (All) | FSBuild2 | Etc...FS9 Support Rig:AMD3200+ | Gigabyte GA-7NNXP | Leadtek NV 5900 | Corsair TwinX1024-3200 (2x512MB) | Intel 1GB LAN | SiI3112 SATA-I 80GB Samsung | IDE-0 80GB IBM | JustCom 4port KVM | FS Wide Client | ActiveSky v6 (512x512x32bit / Wx Influanced)| Radar Contact v4.01 | FS Real Time | FS Flight Keeper | FS Commander | AI Smooth

[jordanal 70]

OK, I'm going to keep chatting with myself here in a public forum if that's alright with everyone, LOL...FWIW, I found the runway length charts in section 3-9 of the manual but these only appear to be landing charts. Searching the entire manual for the word "length" doesn't produce any takeoff charts...AL | KCHS - Charleston AFB/Intl | USAF 437AW (~53 C-17's)FS9/Game Rig:AMD64-4000+ SanDiego OC=210/420/2520 | Asus A8N-SLI Deluxe | Corsair TwinX2048-3200C2PT (2x1GB) 2.5-3-3-8/1T@2.8v | Evga NV 7900GT v84.56 (1280x1024x32/4xAA/16xAF/High-Quality) | Enermax 550W PSU | Thermalright XP-120(mm) HSF | NV 1GB LAN | NV SATA-I Raid-0 223GB (3x80GB Samsung) (WinXPx64/Games) | NV SATA-II WD 320GB (Backups) | IDE-0 80GB Samsung (Archive) | Realtek AC'97 5.1 Surround | CH Yoke, TQ, & Pedals | FS9.1 (Settings max'd/60-40Vis/No-Shadows/20FPS) | WideFS v6.16 | FSUIPC v3.617 | FSGenesis Mesh (All) | PMDG (All) | PAI (All) | FSBuild2 | Etc...FS9 Support Rig:AMD3200+ | Gigabyte GA-7NNXP | Leadtek NV 5900 | Corsair TwinX1024-3200 (2x512MB) | Intel 1GB LAN | SiI3112 SATA-I 80GB Samsung | IDE-0 80GB IBM | JustCom 4port KVM | FS Wide Client | ActiveSky v6 (512x512x32bit / Wx Influanced)| Radar Contact v4.01 | FS Real Time | FS Flight Keeper | FS Commander | AI Smooth

[Epikk 62]

>AL |>KCHS - Charleston AFB/Intl | USAF 437AW (~53 C-17's)>FS9/Game Rig:>AMD64-4000+ SanDiego OC=210/420/2520 | Asus A8N-SLI Deluxe |>Corsair TwinX2048-3200C2PT (2x1GB) 2.5-3-3-8/1T@2.8v | Evga NV>7900GT v84.56 (1280x1024x32/4xAA/16xAF/High-Quality) | Enermax>550W PSU | Thermalright XP-120(mm) HSF | NV 1GB LAN | NV>SATA-I Raid-0 223GB (3x80GB Samsung) (WinXPx64/Games) | NV>SATA-II WD 320GB (Backups) | IDE-0 80GB Samsung (Archive) |>Realtek AC'97 5.1 Surround | CH Yoke, TQ, & Pedals | FS9.1>(Settings max'd/60-40Vis/No-Shadows/20FPS) | WideFS v6.16 |>FSUIPC v3.617 | FSGenesis Mesh (All) | PMDG (All) | PAI (All)>| FSBuild2 | Etc...>FS9 Support Rig:>AMD3200+ | Gigabyte GA-7NNXP | Leadtek NV 5900 | Corsair>TwinX1024-3200 (2x512MB) | Intel 1GB LAN | SiI3112 SATA-I 80GB>Samsung | IDE-0 80GB IBM | JustCom 4port KVM | FS Wide Client>| ActiveSky v6 (512x512x32bit / Wx Influanced)| Radar Contact>v4.01 | FS Real Time | FS Flight Keeper | FS Commander | AI>Smooth#### buddy... what a list !! :-)

[macpac22 0]

check out http://topcat.ofplan.net/very good for takeoff calculations

[jordanal 70]

Very nice looking utility. Thanks for the heads-up. But analysing the screenshots, I don't see where it might tell you that you're going to overshoot a given rwy length unless it pops up in its Alerts window or something.AL | KCHS - Charleston AFB/Intl | USAF 437AW (~53 C-17's)FS9/Game Rig:AMD64-4000+ SanDiego OC=210/420/2520 | Asus A8N-SLI Deluxe | Corsair TwinX2048-3200C2PT (2x1GB) 2.5-3-3-8/1T@2.8v | Evga NV 7900GT v84.56 (1280x1024x32/4xAA/16xAF/High-Quality) | Enermax 550W PSU | Thermalright XP-120(mm) HSF | NV 1GB LAN | NV SATA-I Raid-0 223GB (3x80GB Samsung) (WinXPx64/Games) | NV SATA-II WD 320GB (Backups) | IDE-0 80GB Samsung (Archive) | Realtek AC'97 5.1 Surround | CH Yoke, TQ, & Pedals | FS9.1 (Settings max'd/60-40Vis/No-Shadows/20FPS) | WideFS v6.16 | FSUIPC v3.617 | FSGenesis Mesh (All) | PMDG (All) | PAI (All) | FSBuild2 | Etc...FS9 Support Rig:AMD3200+ | Gigabyte GA-7NNXP | Leadtek NV 5900 | Corsair TwinX1024-3200 (2x512MB) | Intel 1GB LAN | SiI3112 SATA-I 80GB Samsung | IDE-0 80GB IBM | JustCom 4port KVM | FS Wide Client | ActiveSky v6 (512x512x32bit / Wx Influanced)| Radar Contact v4.01 | FS Real Time | FS Flight Keeper | FS Commander | AI Smooth

[michal 44]

Please read this recent thread on almost identical subject.http://forums.avsim.net/dcboard.php?az=sho...d=114003&page=4Michael J.http://www.precisionmanuals.com/images/for...argo_hauler.gifhttp://sales.hifisim.com/pub-download/asv6-banner-beta.jpg

[jordanal 70]

Ohhh Mannn, the one time I don't use the search function, I get busted, LOL. ;) Thanks for the thread-pointer. That does indeed answer it...AL | KCHS - Charleston AFB/Intl | USAF 437AW (~53 C-17's)FS9/Game Rig:AMD64-4000+ SanDiego OC=210/420/2520 | Asus A8N-SLI Deluxe | Corsair TwinX2048-3200C2PT (2x1GB) 2.5-3-3-8/1T@2.8v | Evga NV 7900GT v84.56 (1280x1024x32/4xAA/16xAF/High-Quality) | Enermax 550W PSU | Thermalright XP-120(mm) HSF | NV 1GB LAN | NV SATA-I Raid-0 223GB (3x80GB Samsung) (WinXPx64/Games) | NV SATA-II WD 320GB (Backups) | IDE-0 80GB Samsung (Archive) | Realtek AC'97 5.1 Surround | CH Yoke, TQ, & Pedals | FS9.1 (Settings max'd/60-40Vis/No-Shadows/20FPS) | WideFS v6.16 | FSUIPC v3.617 | FSGenesis Mesh (All) | PMDG (All) | PAI (All) | FSBuild2 | Etc...FS9 Support Rig:AMD3200+ | Gigabyte GA-7NNXP | Leadtek NV 5900 | Corsair TwinX1024-3200 (2x512MB) | Intel 1GB LAN | SiI3112 SATA-I 80GB Samsung | IDE-0 80GB IBM | JustCom 4port KVM | FS Wide Client | ActiveSky v6 (512x512x32bit / Wx Influanced)| Radar Contact v4.01 | FS Real Time | FS Flight Keeper | FS Commander | AI Smooth