777 Jnb ?

[Comoman]

By stopping off in Perth?

[404 Titan]

neville_nobody

Great Circle Distance:

MEL-JNB = 5582.3 nm
HKG-JNB = 5762.2 nm

How will V Aus carry a full load during the summer months? Tech stop in Perth most likely. Winter shouldn't be a problem non stop.

[davidash]

It will be interesting to see which airlines use the new Durban airport (open early next year) which is at sea level. Surely anyone going out east from RSA must consider it as an option - even if only in summer.

[neville_nobody]

404 I didn't explain myself clearly there, JNB-MEL is longer for a 777 as it won't make the great circle track due ETOPS.

[404 Titan]

neville_nobody

I will admit 207 minutes ETOPS which is currently the limit on the 777-300ER may be a problem. 240 minutes is pending though and as can be seen it isn’t a problem from Perth and only requires a slight diversion North to remain inside 240 minutes of a suitable alternate from Melbourne.



Airports used to support ETOPS:

Code Location
MEL Melbourne [Tullamarine Intl], Vic, AU
JNB Johannesburg [Oliver Reginald Tambo Intl (Jan Smuts Intl)], ZA
PER Perth [Intl], WA, AU
MRU Mauritius [Sir Seewoosagur Ramgoolam Intl], MU
SEZ Mahé [Seychelles Intl], Mahé Island, SC
MLE Malé [Intl], Hululé Island, MV
CGK Jakarta [Soekarno-Hatta Intl], ID

[gofor]

The V Oz to MEL on the 777 is no sweat as long as the departure is in the evening where temperatures in summer drop below 20degC. CX to HKG want the 1pm dep slot

[404 Titan]

gofor

With an average minimum temperature during the hottest time of the year of 14°C, you could expect the temperature to be around 20°C by the departure time of 8:40pm. A quick look at an RTOW for one of our 777-300ER’s out of JNB reveals a max ATOW of 320.3T for RWY 21R (up hill), 20°C, 1013, 0 Wind, F15, Packs Off or APU to Packs, Alt CG ≥ 31.2% and TO Bump. The max structural TOW for our ER’s is 351.53T so there is still quite a weight penalty (31.23T) to be suffered at this time of the day. If you compare this to one of our 400’s with the same conditions the weight penalty is about 22T’s.