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Thank you for your very detailed reply JB. The type of engine vibration I had in mind could be classed as catastrophic, maybe a fan blade parting company or perhaps an engine full of seagulls. Question - In the early days of under wing jet engines I was told that the engine was mounted onto the...

If you chose the flying option what would you do about the vibrating engine? If you immediately shut it down can three engines take a fully laden A380 aloft? Bearing in mind that you have fuel for 14 hours on board simply going around would not be available due to landing weight. I assume you...

The question of rotation is very important as it can affect harmonic vibration. A motor cruiser with dual propellers for example, should have each one rotating in a different direction (contra rotating) . Some stern drives have two concentric contra rotating propellers, as do some propeller...

I refer to the question of aircraft braking. Here is the scenario: Your aircraft is an A380 fully loaded and with fuel for 14 hours flying. Your route is SIN to LHR. You have started your takeoff roll and when just short of V1 the outer starboard engine starts to vibrate violently. In order of...

Qantas is getting more like TAA was every day.

In this case you chose runway 34, not surprising since it is 1,371 metres longer. do you do these sort of calculations for every landing, did you actually do the calculation for 27 to get the results that you refer to?

Obviously this observation is made by someone on the flight deck. As a frequent passenger on B737 and on A320/1 I can attest to the fact that the effect of reverse thrust in the passenger cabin can be horrific. If heavily applied the whole fuselage shakes and rattles and the roar emitted from...

two alternate subjects: Setting sun - flying west in the late afternoon well above the clouds must place a great strain on a the eyes due to glare. What measures are available (other than a good pair of sun glasses) to reduce the glare. Is it possible to black out the windscreen altogether? Do...

many thanks jb. Your reply is very comprehensive. I guess in the case of a diversion due to weather you would just sit tight until you got an all clear from you destination. However in the case of a technical problem would you wait for a suitably qualified engineer (either local or flown in) or...

I am interested in diversions. You mentioned two medical cases, where did you divert to in these instances. Have you done many diversions? I imagine the decision to divert would not be taken lightly. What occurrences would cause you to divert and what factors must you consider. A short time ago...

Apart from running out of fuel what other dangers are there which could prevent the flight from making it to London?

Whats happening to the engine? Looks like they have the cowling lifted and a close look reveals the same on the other side. Maybe they are checking the oil and water and will do the tyres next.

Thanks to Ansett for the heads up re the Pride of America cruise. My wife and I did the around Hawaii cruise on NCL about 15 years ago and that was fine. We certainly didnt have to pay extra to have our room serviced. It is interesting that at that time NCL had to include a foreign port in their...

Totally agree that spinner cases are to be shunned. The main problem I have with them is that can take off when your back is turned. Any paved surface with the slightest fall means the case has a mind of its own. Another thing is the wheels on a two wheel case are larger and more able to cope...

no Loo contents? was this ever done?

On the question of weights , other than loss of weight due to fuel burn does an aircraft lose any other weight during a long haul flight eg LAX - MEL ?

The flight I was talking about was in 1986 and it was one of the first Qantas flights to Beijing. I think at that stage Qantas maintained engines for the Chinese in their Sydney workshops. As it turned out we carried another engine on the return journey back to SYD. It was interesting to look...

A very interesting find defurax the engine looks quite small and I guess there would be a limit on the amount of thrust that mounting would take. I wonder if the test engine would fly the 747 at cruising altitude? I once flew in a QF 747 Sydney to Beijing with a spare 747 engine attached under...

Many thanks Boris and jb. I can well understand how you earn your money, to get all this right is quite an act.

Please forgive me for branching out in another direction - engine operation. I would be interested to know the engine speed in rpm during taxi, at takeoff and at cruising level. In an aircraft like the A380 what power (in percentage terms) is used at take off. Is it 100% ? I recall that in early...