B777 Info

[UnusualAttitudes]

Hello all,

Was wondering any 777 drivers could please help me out with any of the following info as part of a project that I have to complete. (From an ATC perspective)

Whilst I am guessing that max/min speeds are rather similar to other twin jets, some specific figures are required.

1. Max/min/profile speed on descent
2. Speed inside 30nm to dest.
3. Speed inside 15nm to dest.
4. Final approach speed.
5. CLIAS
6. Ceilings for -200 and -300 models

Also any other specific info on the type which may help ATC when processing these aircraft.

Regards,

UA

[BuzzBox]

As a general guide:

Max/min/profile speed on descent:

Max speed: 310-315 KIAS due to the relatively low Vmo (330 KIAS). It's very easy to overspeed if there's a wind change on descent. The -300ER will have a higher Vmo (350 KIAS) which should allow a higher max speed on descent.

Min speed: Not less than 250-260 KIAS at higher levels (above FL250), but lower down can reduce to min. clean speed if necessary (around 230 KIAS in a heavy -300).

Profile speed: 300 KIAS


Speed inside 30nm to dest:
Normally 250 KIAS if speed control is in force (ie 250/10,000), otherwise 300 KIAS reducing to around 220 KIAS by 20 nm or so.


Speed inside 15nm to dest:

Around 180-200 KIAS.


Final approach speed:
Anywhere between 155 KIAS for a heavy -300, and 125 KIAS for a light -200.


CLIAS:

Typically, 300-310 KIAS


Ceiling:

Max operating altitude is 43,100 ft for both models - only achievable at relatively light weights.

Some of the above speeds will vary, depending on weight.

[UnusualAttitudes]

Thanks for your help. Much appreciated.

1 last thing, What is the average RoC at typical weights for the -200 and -300

[takeonme]

Yeah sure your ATC mate, 10 bucks you've just got your GFPT and am boning up on the speeds to impress the people when you have you're airline interview in 6 months time.

Or you've just done your first solo and flying 777's is practically just around the corner, so you thought you should do some reading up.

Here's a hot tip mate, normally you get rated first before you start processing aircraft. Stop chasing german's and eating pies for dinner.

By the way, there is no -300 model....its crap...crap...crap oh wait yeah...yeah ...you're right.

[BuzzBox]

What is the average RoC at typical weights for the -200 and -300

As a rough guide:

-200:

1,500-2,000 ft/min at lower levels (below FL200), reducing to approx 1,000 ft/min at higher levels.

-300:

1,000-1,500 ft/min at lower levels, reducing to around 800 ft/min. The -300 can be a slug when climbing at higher levels, particularly when it's heavy. It can be a bit of a struggle to reach the cruising level prior to the FIR boundary ex HKG (eg. Envar or Dofin/Sikou)

Again, there can be a wide variation depending on weight/temperature, etc.

[UnusualAttitudes]

BuzzBox,

Thanks again.

Takeonme or whatever you call yourself......What are you on about???

Lay off the drugs dude.