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B744 Climb  
User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Posted (12 years 10 months 3 days 5 hours ago) and read 1344 times:

Hi everyone,

I came across this question when I am playing my FS 2000 B747-400 proffesional pack.

At what Vspeed and IAS generally does a B747-400 climb when it took off from maximum take-off weight in reality? On my FS2K, I am about half of the maximum take-off weight of the B744, climbing to FL350, only passing 15,000 feet and with a IAS of 270 knots, I am at full power. If this is the case, how does the B747-400 climb in reality with full weight? And, I virtually cannot climb when I took off on Maximum take-off weight but in reality I see those close to MTOW B744s can climb at a reasonable rate. Or is it just FS2K inaccuracy?

Can someone explain to me what are the procedures to climb a B744, may it be light or heavy? I would really love to know.

Thanks a lot

alvin


Boeing747 万岁!
17 replies: All unread, jump to last
 
User currently offlineAJ From Australia, joined Nov 1999, 2386 posts, RR: 24
Reply 1, posted (12 years 10 months 2 days 17 hours ago) and read 1215 times:

Hi Alvin,
In reality a heavy B744 would only just be completing flap retraction at 270kts.
Depending on the cost index being used for the flight an economy climb would be at about 340kias, transfering to M0.84 or so in the higher levels. The local ATC 250kias below 10,000' does not normally allow economic climb at high weights.
By 'half Max Takeoff' what do you mean?
Cheers,
AJ.


User currently offlineNbirger From Canada, joined Mar 2001, 69 posts, RR: 0
Reply 2, posted (12 years 10 months 2 days 15 hours ago) and read 1187 times:

Hello,

From what I have read the 744's intermediate climb is at 310KIAS. I believe the 744's economy climb speed is between 300-340KIAS.

I also remember reading somewhere that ATC usually give the 747's special clearance to climb at faster speeds under 10,000'.


Hope this helps,
-Nick


User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 3, posted (12 years 10 months 2 days 10 hours ago) and read 1160 times:

Thanks for the replies. Hmm.. 300-340ias is really fast I think.

AJ, half take off means that I took the B744 off with only half the weight of a full B744.

alvin



Boeing747 万岁!
User currently offlineAJ From Australia, joined Nov 1999, 2386 posts, RR: 24
Reply 4, posted (12 years 10 months 2 days 10 hours ago) and read 1155 times:

Hey Alvin, considering the average zero fuel weight of a B744 on a commercial operation is about 220 T, and you'd want at least 30 T of fuel you are looking at a minimum weight of about 250 T out of a possible 397 T. To be realistic half weight of 200 T is very light!

User currently offlineVictor Alpha From , joined Dec 1969, posts, RR:
Reply 5, posted (12 years 10 months 2 days 6 hours ago) and read 1137 times:

Hi AJ,

Why do u need a min of 30T of fuel? 30T can last around 2hrs for a trip inclusive of t/o and landing.

-Regards, VA


User currently offlineAJ From Australia, joined Nov 1999, 2386 posts, RR: 24
Reply 6, posted (12 years 10 months 1 day 16 hours ago) and read 1097 times:

30T is our minimum flight load to prevent fuel pump uncovering in all flight regimes, critically in an aborted take off, when you don't want to have all the fuel flow forward and uncover the pumps, shutting the engines down when you need full reverse!

User currently offlineVictor Alpha From , joined Dec 1969, posts, RR:
Reply 7, posted (12 years 10 months 1 day 6 hours ago) and read 1084 times:

Hi AJ

I see, cool, so you're saying that the 747 has to take off with a min of 30T to prevent problems during RTO.

Wow I didnt know that I always thought aircraft could take off with just suffice fuel for the journey plus extras for diversion.

Thanks for the info  Smile/happy/getting dizzy Greatly appreciated.

-Regards, VA



User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 8, posted (12 years 10 months 1 day ago) and read 1070 times:

Great info AJ... I didn't know that too. Interesting  Smile

Thanks everyone again

alvin



Boeing747 万岁!
User currently offlineKU104 From Kuwait, joined Dec 2000, 29 posts, RR: 0
Reply 9, posted (12 years 10 months 20 hours ago) and read 1071 times:

For what its worth I have asked many pilots about what V-speed and IAS to use on climb. Usually they say it depends on the weight of the Aircraft. The average say for a 6 hour trip on an A340 that is 3/4 full is 2100FPM. Also on takeoff you need a high trim number say about +7 or +8. ON FS2K this would give you a climb speed of 180kts with 20degree flaps, and 2500fpm and N1 at 92% (I never use full power as pilots say it reduces engine "wear & tear" and increases engine performance and life. You can tell most my flights are as realistic as possible lol). That is what I normally use and it is a believable climb speed. Stepping up the altitude I use 250 until 10000ft. Then 290 until FL250 (trim would still be at Take-off setting) I switch to Mach and let it hold 0.80 (on a 744) until it reaches a stable fuel flow. Finally let her climb to cruise altitude and set the cruise Mach. This is all depending in info I gathered and what I do to complete succesful flights on FS.

User currently offline747-400buff From Australia, joined Jul 2001, 43 posts, RR: 0
Reply 10, posted (12 years 10 months 17 hours ago) and read 1068 times:

Hi Alvin

Nice to meet another fellow flight simmer....

As many others seem to have responded to your question I will not bore you by repeating the answers of others. I will however, only point you in the direction of an EXCELLENT (sorry mate, but I have NO affilliation with this site and this is NOT a paid commercial) Website, that REALLY teaches you to fly the 747-400 .

Aerowinx.com

The guys there are real gurus when it comes to technical questions...even if you DONT fly their software (It's designed for commercial pilots who want to upgrade their rating to a 747-400) feel free to ask your questions of them anyway

Regards
Fellow simmer
Dave Hollingsworth
Perth
Australia


User currently offlineAJ From Australia, joined Nov 1999, 2386 posts, RR: 24
Reply 11, posted (12 years 10 months 17 hours ago) and read 1055 times:

Hello Dave,
I would second the Aerowinx recommendation, I use the program to prepare for my simulator sessions!
Cheers,
AJ.


User currently offline747-400buff From Australia, joined Jul 2001, 43 posts, RR: 0
Reply 12, posted (12 years 10 months 9 hours ago) and read 1045 times:

Hi AJ

Aerowinx (PS1.3a) is the ONLY flight sim I now fly...
...and YES, I'm a registered user too!! 8o)

Regards
Dave


User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 13, posted (12 years 10 months 5 hours ago) and read 1037 times:

Thanks all again. Nice to meet more simmers here too. The Aerowinx thingie? I have it in my computer now... really cool... one point is that I can't set it to clear weather and maximum visibility.

alvin



Boeing747 万岁!
User currently offlineAJ From Australia, joined Nov 1999, 2386 posts, RR: 24
Reply 14, posted (12 years 9 months 4 weeks 1 day 18 hours ago) and read 1030 times:

The Aerowinx sim is more of a procedural trainer, designed for 'real thing' type training. Don't expect to fly under the Harbour Bridge etc. in this one. The outside graphics consist of permently darkened runways and poor weather!
The inside graphics, however, are excellent.


User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 15, posted (12 years 9 months 4 weeks 1 day 14 hours ago) and read 1013 times:

I agree AJ, this software is really a good one, almost like a real 747-400. Sometimes I thought, if only they had the graphics of FS, it would really be fantastic.  Smile

Anyway, anyone knows if there are going to come up with a B777 one?

alvin



Boeing747 万岁!
User currently offlineRyu2 From Taiwan, joined Aug 2002, 490 posts, RR: 0
Reply 16, posted (12 years 9 months 4 weeks 1 day 13 hours ago) and read 1008 times:

There's a addon for PS1 called Scenery Injector that lets you connect it to a second computer running FS2000 to generate the scenery views, so you can have the best of both worlds -- PS1 realism and FS2000 graphics.

Sounds great -- I only wish I had a second computer!


User currently offlineMr.BA From Singapore, joined Sep 2000, 3423 posts, RR: 22
Reply 17, posted (12 years 9 months 4 weeks 1 day 7 hours ago) and read 999 times:

Thanks for the info Ryu... too bad I don't have a second computer too.  Sad

alvin



Boeing747 万岁!
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