Hi guys,
Sorry I could not get back to the forum earlier because I was busy these days ... Thank you in any case for your interventions ...
AerocatS2A
Curious what airline management sim do you play?
In fact, at first I started playing Manager Manager, but I did not find it fairly realistic to look at it, and as I went through it, I came across a community simulating with an unprecedented level of detail the Life of a real company and all its management parameters !! ... I give you here an overview of the characteristics of Airwaysim(
https://www.airwaysim.com/Information/Features).
wiggy
You'll regularly see 2 hr or less stops routinely programmed at airports for Long Haul heavy types these days. and that's mainly due to the time it takes for the cabin to be cleaned and galleys to be refilled. The aircraft systems do not need to "rest" so the actual technical turnaround might just be a refuel and the engineers checking the engine oil levels and walking around the aircraft to check the gear and airframe for any signs of problems.
As an extreme example the shortest turnaround I've seen for a 747 was just under 40 minutes ( brakes on - one pax off (medical) - top up of fuel, check of engine oils - sign paperwork- push back- depart).
It seems to me I have read I do not know where the recommendations of the manufacturers to spare the reactors and avoid the risk of breakdowns. This concerns the critical phases of take-off and initial climb to the cruising level: I understand that 99% of the thrust should never be used during taxiing on the take-off runway, and that once the climb has been engaged The pilots must progressively reduce the thrust to stabilize it to a little more than 80% in cruising ... To apply too frequently the reactors to their maximum power on takeoff can be cause of breakdown ... From there I deduced by extension That the reactors had to be spared after sustained efforts like 12 hours of flight, to avoid too close cycles of maximum efforts on takeoff ...
On the other hand, it is true that I did not take into account other stopovers operations such as passenger cabin cleaning, refueling and food, and loading / unloading luggage. On other forums I could see schedules inserted in the documentation of the manufacturers on the ground operations, but that I did not know how to interpret correctly. I also know that now the kerosene feeding of airplanes is done by an underground network of pipelines leading to the locations of airplanes: the fuel is then pumped from the ground and directly injected into the tanks of the planes, without needing a tanker truck . How long does it take a full tank of gas to run a bi-reactor? Does it depend on aircraft types and sub-types (B777-200 / 300, A330-200 / 300 etc)?
On the other hand the time of turnaround you quote me for the B747 of 40 minutes, please with a sick passenger to evacuate, seems completely unimaginable !! ... This delay is already too fair for the A320 and B737 of low cost airlines !! ...
chevvron&wiggy
When flying Heathrow to Rio or return (BA 777), there is a tech stop at Sao Paulo which last about 1 hour.
wiggy
Ah yes, I can't recall if all the pax have to get off on that transit and then reboard or whether those "going through" can stay onboard - they used to be able to and that speeds the tech stop up. I've also seen on occasions 1 hour transits done in SIN on the LHR/Oz routes, and that is somewhere where everybody has to get off, but the key to that one working so quickly is having efficient ground staff and an efficient terminal/gate layout.
Chevvron and Wiggy, here is a rapid stopover due to an insufficient range of this airplane which does only suppose I think usual checks and the refueling in kerosene of the plane ... In general this n Is that at the final destination of the plane one prepares it for a new flight after the passengers left it ...
B2N2
Financial reasons. Airplanes cost money sitting on the ground. Just for the fun of it:
Airplane cost $240 million new
Depreciation to zero: 20 years
That's $12million/year just in depreciation.
$32,876/ day
$1,367/hr
$22.83/min.
This is just depreciation. Doesn't include maintenance cost and insurance over 20 years. Long haul airplanes can spend up to 16-18hrs in the air in a 24hr period. Two legs plus turn around. Some passengers flights are conducted at a loss and some may only make $300-$500 profit. On an entire flight. Any delay costs money. Big money.
B2N, I am aware of the costs involved with airplanes for a company, and in the report I saw on the Air France A380 I learned that its parking cost the company just over $ 2,000 / H, not including the other airport charges of destination airport and base airport of company ... But concerning the long haul flights, for flights at a loss or with ridiculous profits, the companies of the emirates (Qatar Airways, Etihad etc ...) have competitive advantages that cause prices to be broken compared to traditional companies as well ...
To get back know to my subject, can we standardize the turnaround time of some planes like ATR, B737 / A320, B767 / A330 etc ...?