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London Transport (uk.transport.london) Discussion of all forms of transport in London. |
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#23
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Heathrow CC
On Fri, 27 Sep 2019 20:11:38 -0000 (UTC)
Recliner wrote: wrote: On Mon, 23 Sep 2019 19:47:45 -0000 (UTC) Recliner wrote: 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. Borispol, Kiev. https://www.123rf.com/photo_11341508...5-2018-the-pus hback-of-the-ellinair-airbus-a320-200-aircraft-in-the-borisp.html https://youtu.be/7ifDnXNNeLM Not even bothering to look - I was in a plane that did it there so go do one. |