Moderators: richierich, ua900, PanAm_DC10, hOMSaR

 
UA857
Topic Author
Posts: 666
Joined: Thu Aug 10, 2017 3:41 am

Planned range for the 777-9?

Sat Apr 17, 2021 5:05 pm

What is the planned range for the 779 can it be able to fly ULH routes such as JFK/EWR-SIN, JFK-SYD and LHR-SYD with a full payload or can it only fly routes that the 744/77W/748 can fly? If so will the 778 be cancelled if the 779 can be able to do ULH routes? Any thoughts?
 
mig17
Posts: 361
Joined: Thu Aug 11, 2016 8:34 am

Re: Planned range for the 777-9?

Sat Apr 17, 2021 9:41 pm

Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.
A30B IW/TG, A313 EK, A318/9/20/1 AF/U2/VY, A332/3 EK/QR/TX, A343 AF, A35K QR, A388 AF, AT72 A5/TX, B722 AT, B734/8 UX/SK/TO/SS, B742/3/4 UT/AF/SQ/BA/SS, B762 UA, B77E/W AF/QR, C-150/72, CRJ1/7/X A5, E145/70/90 A5/WF, DH8D WF, PC-6.
 
UA857
Topic Author
Posts: 666
Joined: Thu Aug 10, 2017 3:41 am

Re: Planned range for the 777-9?

Sun Apr 18, 2021 2:46 am

mig17 wrote:
Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.


Isn't the 779 designed to fly further than the 77W?
 
flipdewaf
Posts: 4050
Joined: Thu Jul 20, 2006 6:28 am

Re: Planned range for the 777-9?

Sun Apr 18, 2021 6:48 am

UA857 wrote:
mig17 wrote:
Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.


Isn't the 779 designed to fly further than the 77W?

It appears to have the same spec range and, with the greater spec payload, the same MZFW range too. It does appear to have a large cabin floor area and so may well be very suited to high premium airlines where space matters more than weight.

Fred


Sent from my iPad using Tapatalk
Image
 
mig17
Posts: 361
Joined: Thu Aug 11, 2016 8:34 am

Re: Planned range for the 777-9?

Sun Apr 18, 2021 11:05 am

flipdewaf wrote:
UA857 wrote:
mig17 wrote:
Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.


Isn't the 779 designed to fly further than the 77W?

It appears to have the same spec range and, with the greater spec payload, the same MZFW range too. It does appear to have a large cabin floor area and so may well be very suited to high premium airlines where space matters more than weight.

Fred


Sent from my iPad using Tapatalk

It seem the 779 has the same payload/range than the 77W. It is heavier and longer but also with more efficient engines and wings.
A30B IW/TG, A313 EK, A318/9/20/1 AF/U2/VY, A332/3 EK/QR/TX, A343 AF, A35K QR, A388 AF, AT72 A5/TX, B722 AT, B734/8 UX/SK/TO/SS, B742/3/4 UT/AF/SQ/BA/SS, B762 UA, B77E/W AF/QR, C-150/72, CRJ1/7/X A5, E145/70/90 A5/WF, DH8D WF, PC-6.
 
User avatar
Lingon
Posts: 123
Joined: Sun Sep 03, 2017 4:18 pm

Re: Planned range for the 777-9?

Sun Apr 18, 2021 12:45 pm

mig17 wrote:
Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.


Forgive an ignorant person, but I am really curious what 7285 nmi design range means. When the plane has flown the 7285 nmi distance (under some specified set of conditions), do the motors flame out, does the plane still have fuel to hold and land with contingency fuel intact, is it even possible to reach some alternate? Shorter said - how long can a viable route typically be when the design range is 7285 nmi?
 
mig17
Posts: 361
Joined: Thu Aug 11, 2016 8:34 am

Re: Planned range for the 777-9?

Sun Apr 18, 2021 3:49 pm

Lingon wrote:
mig17 wrote:
Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.


Forgive an ignorant person, but I am really curious what 7285 nmi design range means. When the plane has flown the 7285 nmi distance (under some specified set of conditions), do the motors flame out, does the plane still have fuel to hold and land with contingency fuel intact, is it even possible to reach some alternate? Shorter said - how long can a viable route typically be when the design range is 7285 nmi?

An aircraft performance is known and described in the technical documentation of the type. For exemple, take off performances.
For range and payload, both are linked, the manufacturer define a payload range curve giving max nominal range of the aircraft depending of the payload.
The max range of an aircraft can be limited
- by MTOW and for each given payload how much of the MTOW is left for fuel.
- by max fuel if the tank are full whatever the payload is under MTOW.
A30B IW/TG, A313 EK, A318/9/20/1 AF/U2/VY, A332/3 EK/QR/TX, A343 AF, A35K QR, A388 AF, AT72 A5/TX, B722 AT, B734/8 UX/SK/TO/SS, B742/3/4 UT/AF/SQ/BA/SS, B762 UA, B77E/W AF/QR, C-150/72, CRJ1/7/X A5, E145/70/90 A5/WF, DH8D WF, PC-6.
 
User avatar
Lingon
Posts: 123
Joined: Sun Sep 03, 2017 4:18 pm

Re: Planned range for the 777-9?

Mon Apr 19, 2021 6:56 am

mig17 wrote:
Lingon wrote:
mig17 wrote:
Per Boeing (https://www.boeing.com/commercial/777x/ ... ical-specs) the 777-9 design range is 7,285 nmi (13,500 km) with 426 pax (~43t). And the 777-9 doesn't seems to be a good ULH plane.


Forgive an ignorant person, but I am really curious what 7285 nmi design range means. When the plane has flown the 7285 nmi distance (under some specified set of conditions), do the motors flame out, does the plane still have fuel to hold and land with contingency fuel intact, is it even possible to reach some alternate? Shorter said - how long can a viable route typically be when the design range is 7285 nmi?

An aircraft performance is known and described in the technical documentation of the type. For exemple, take off performances.
For range and payload, both are linked, the manufacturer define a payload range curve giving max nominal range of the aircraft depending of the payload.
The max range of an aircraft can be limited
- by MTOW and for each given payload how much of the MTOW is left for fuel.
- by max fuel if the tank are full whatever the payload is under MTOW.


Thank you, I understand that much. But is the range defined as the absolute maximum the plane is able to fly under the specified conditions (until fuel exhaustion), or as the useful distance you can operate the plane (landing with prescribed spare fuel)?
If I am to operate a route that is 7200 nmi long, can I use a plane with range 7285 nmi (under the specified conditions regarding take off weight, fuel load, weather...) ?
 
VSMUT
Posts: 5390
Joined: Mon Aug 08, 2016 11:40 am

Re: Planned range for the 777-9?

Mon Apr 19, 2021 7:12 am

Lingon wrote:
mig17 wrote:
Lingon wrote:

Forgive an ignorant person, but I am really curious what 7285 nmi design range means. When the plane has flown the 7285 nmi distance (under some specified set of conditions), do the motors flame out, does the plane still have fuel to hold and land with contingency fuel intact, is it even possible to reach some alternate? Shorter said - how long can a viable route typically be when the design range is 7285 nmi?

An aircraft performance is known and described in the technical documentation of the type. For exemple, take off performances.
For range and payload, both are linked, the manufacturer define a payload range curve giving max nominal range of the aircraft depending of the payload.
The max range of an aircraft can be limited
- by MTOW and for each given payload how much of the MTOW is left for fuel.
- by max fuel if the tank are full whatever the payload is under MTOW.


Thank you, I understand that much. But is the range defined as the absolute maximum the plane is able to fly under the specified conditions (until fuel exhaustion), or as the useful distance you can operate the plane (landing with prescribed spare fuel)?
If I am to operate a route that is 7200 nmi long, can I use a plane with range 7285 nmi (under the specified conditions regarding take off weight, fuel load, weather...) ?


In practice there is no specific maximum range. It depends on actual conditions, availability of alternate airports at the destination and payload. 85 nm longer should be possible if you tweak the flight a bit, reducing payload, flying at a more economical level etc., but if conditions turn out to be worse than expected, you could also end up having to divert.

Who is online

Users browsing this forum: Bing [Bot] and 27 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos