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#21
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Heathrow CC
On 23/09/2019 17:01, Recliner wrote:
But moving the aircraft to and from the remote stands costs money and disrupts other aircraft movements, so is only worth doing if there's a shortage of gates. Yes but again with an automated, electrically powered movement system that might be able to be improved. Talking of that, there's an awful lot of dead space at airports covered with grass - could you cover that with solar panels to charge up batteries to power all those autonomous tugs? I just always appreciate when I land on a plane late in the evening that despite the airport being almost done for the day, you always seem to end up at some remote gate and have a hike to passport control past plenty of dark gates all with aircraft sat at them that clearly won't be used for a good number of hours. |
#22
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Heathrow CC
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#23
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Heathrow CC
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#24
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Heathrow CC
In message , at 17:46:05 on Mon, 23
Sep 2019, MissRiaElaine remarked: They should never have gone for a 3rd runway at Heathrow. A second runway at Gatwick would make far more sense. I wonder why no-one suggested that? -- Roland Perry |
#25
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Heathrow CC
wrote:
On Mon, 23 Sep 2019 15:44:25 -0000 (UTC) Recliner wrote: wrote: On Mon, 23 Sep 2019 16:04:12 +0100 Recliner wrote: On Mon, 23 Sep 2019 14:58:53 +0100, Basil Jet aircraft using the new runway such as the A380 which burns half a ton of fuel just to get from the gate to take off position. Isn't that what those yellow drones someone linked to last week are for? They don't fly, so they're not drones. They're robotugs called Mototok Spacer 8600s. They aren't powerful enough to push back wide-bodied jets, though a larger model might. In any case, they don't replace any jet fuel, as pushback would otherwise be done by hefty diesel tugs. So they save some diesel fuel and fumes, but not aviation fuel. If you knew anything about physics you'd be aware that using a jet engine to push a vehicle on the ground is far less efficient than using powered wheels. Half of the energy is wasted on chucking air backwards rather than making the aircraft go forwards. Who are you arguing with? Nobody claimed that jet engines were an efficient way of moving large vehicles slowly round an airport. We were discussing diesel vs battery pushback tugs. At some airports - don't know about heathrow - some aircraft push back using reverse thrusters. Name one. |
#26
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Heathrow CC
MissRiaElaine wrote:
On 23/09/2019 16:32, wrote: I used to work near heathrow and the number of people travelling there by private car was a small percentage of the total. I don't see why that would change with a 3rd runway. And my office overlooked one of the parking pounds of one of the private parking companies. Anyone who had seen what those ****wits got up to with their prized possesion would never park at heathrow again. They should never have gone for a 3rd runway at Heathrow. A second runway at Gatwick would make far more sense. Not according to the official Airports Commission, the majority of passengers or the airlines. |
#27
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pushback to avoid paying the Heathrow CC
In article , wrote:
At some airports - don't know about heathrow - some aircraft push back using reverse thrusters. The last plane I saw push back with a thrust reverser was an MD-80 quite a long time ago. I believe that nobody does that any more both because it burns a lot of fuel, and the risk of junk getting into the engine or the exhaust hurting someone on the tarmac near the plane. -- Regards, John Levine, , Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly |
#28
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pushback to avoid paying the Heathrow CC
On 24/09/2019 03:39, John Levine wrote:
In article , wrote: At some airports - don't know about heathrow - some aircraft push back using reverse thrusters. The last plane I saw push back with a thrust reverser was an MD-80 quite a long time ago. I believe that nobody does that any more both because it burns a lot of fuel, and the risk of junk getting into the engine or the exhaust hurting someone on the tarmac near the plane. It's actually the fact that most airport terminals are now vast walls of glass and the consequential risk of damage (obviously not every time, but even with a 0.1% chance then that's one broken pane a day at e.g. LHR) |
#29
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pushback to avoid paying the Heathrow CC
Someone Somewhere wrote:
On 24/09/2019 03:39, John Levine wrote: In article , wrote: At some airports - don't know about heathrow - some aircraft push back using reverse thrusters. The last plane I saw push back with a thrust reverser was an MD-80 quite a long time ago. I believe that nobody does that any more both because it burns a lot of fuel, and the risk of junk getting into the engine or the exhaust hurting someone on the tarmac near the plane. It's actually the fact that most airport terminals are now vast walls of glass and the consequential risk of damage (obviously not every time, but even with a 0.1% chance then that's one broken pane a day at e.g. LHR) Yes, reverse thrust pushbacks are banned at most terminals because of the significant risk of damage to the building, ramp workers, vehicles and ground equipment, as well as FOD to the aircraft engines (the debris blown forward would be sucked into the engines). If no pushback tugs are available for an extended period for some reason (eg, a strike), an airline may request a reverse thrust departure (if their aircraft is capable of it — not all are) but the request would normally be rejected. It would certainly need to be approved at a high level, and I wonder whose insurance would cover the likely damage? |
#30
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Heathrow CC
Recliner wrote:
Name one. Was quite common at DFW with American Airlines DC-9/MD-80 aircraft. They stopped doing that when fuel prices spiked a number of years ago. |
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