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With Travel Halted, What Happens To The Planes?

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cdev:
I suppose some could do what this man has done..  Live in one...



SkyMaster:

--- Quote from: jogri on August 12, 2020, 04:45:10 pm ---
--- Quote from: langwadt on August 12, 2020, 08:43:56 am ---that's not a landing that is an aborted takeoff

--- End quote ---

Yeah, and a nominal V1 (maximum speed at which a start can be aborted) is around 160 knots while a landing with MTOW will get you in the same range (usual landing speeds are in the 130-150 knots range)... So the only main difference is that the tires never left the ground for the aborted takeoff, but other than that a fast landing produces a similar strain on the aircraft than an aborted takeoff.

--- End quote ---

I would be surprised if it is possible to land a B747 at Maximum take-off weight (MTOW).

The flight manual and SOP (airline standard operating procedure) probably limit the weight at which the B747 can land. And, after taking off at MTOW, the B747 would not be at MTOW anyway... because... fuel burn  ;)

 :)

jogri:

--- Quote from: langwadt on August 12, 2020, 08:20:13 pm ---sure brake pads and the time to change them cost money

--- End quote ---

Those are videos from runway 05R, the taxiway is at the end of a 3.2 km long runway so the pilot has to drive down the runway anyway to reach the gates... So why bother? It gives you a smoother landing, cuts down the time required to reach the gate and avoids the chance of foreign object damage. And since the plane doesn't land with its maximum take-off weight the brakes don't have to work that hard (a full 747 has fuel for 16h, and you typically have enough fuel for ~1h of flight left when you land, that alone can be a difference of up to 150 tons between take-off and landing)



--- Quote from: SkyMaster on August 12, 2020, 09:00:59 pm ---I would be surprised if it is possible to land a B747 at Maximum take-off weight (MTOW).

The flight manual and SOP (airline standard operating procedure) probably limit the weight at which the B747 can land. And, after taking off at MTOW, the B747 would not be at MTOW anyway... because... fuel burn  ;)

 :)

--- End quote ---

Well, you could probably get it down in one piece but at the cost of a totaled airframe... Or you cold proceed to dump 100 tons of fuel, but that's going to take some time (probably around an hour given that you first have to find an appropriate spot).

langwadt:

--- Quote from: SkyMaster on August 12, 2020, 09:00:59 pm ---
--- Quote from: jogri on August 12, 2020, 04:45:10 pm ---
--- Quote from: langwadt on August 12, 2020, 08:43:56 am ---that's not a landing that is an aborted takeoff

--- End quote ---

Yeah, and a nominal V1 (maximum speed at which a start can be aborted) is around 160 knots while a landing with MTOW will get you in the same range (usual landing speeds are in the 130-150 knots range)... So the only main difference is that the tires never left the ground for the aborted takeoff, but other than that a fast landing produces a similar strain on the aircraft than an aborted takeoff.

--- End quote ---

I would be surprised if it is possible to land a B747 at Maximum take-off weight (MTOW).

The flight manual and SOP (airline standard operating procedure) probably limit the weight at which the B747 can land. And, after taking off at MTOW, the B747 would not be at MTOW anyway... because... fuel burn  ;)

 :)

--- End quote ---

google says: Maximum take-off weight for 747 is roughly 400tons depending on model, and maximum landing weight is roughly 100tons less

langwadt:

--- Quote from: jogri on August 12, 2020, 09:05:55 pm ---
--- Quote from: langwadt on August 12, 2020, 08:20:13 pm ---sure brake pads and the time to change them cost money

--- End quote ---

Those are videos from runway 05R, the taxiway is at the end of a 3.2 km long runway so the pilot has to drive down the runway anyway to reach the gates... So why bother? It gives you a smoother landing, cuts down the time required to reach the gate and avoids the chance of foreign object damage. And since the plane doesn't land with its maximum take-off weight the brakes don't have to work that hard (a full 747 has fuel for 16h, and you typically have enough fuel for ~1h of flight left when you land, that alone can be a difference of up to 150 tons between take-off and landing)



--- Quote from: SkyMaster on August 12, 2020, 09:00:59 pm ---I would be surprised if it is possible to land a B747 at Maximum take-off weight (MTOW).

The flight manual and SOP (airline standard operating procedure) probably limit the weight at which the B747 can land. And, after taking off at MTOW, the B747 would not be at MTOW anyway... because... fuel burn  ;)

 :)

--- End quote ---

Well, you could probably get it down in one piece but at the cost of a totaled airframe... Or you cold proceed to dump 100 tons of fuel, but that's going to take some time (probably around an hour given that you first have to find an appropriate spot).

--- End quote ---

google..  747 fuel capacity ~200tons, fuel consumption London to New York ~70tons,  time to dump 100tons ~55 minutes

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