eightyknots Posted October 15, 2012 Share Posted October 15, 2012 Maybe H.H., when your'e an old fart like me, you remember the things from the Mk1 of everything! Hah! That's funny... ...and telling!! Link to comment Share on other sites More sharing options...
facthunter Posted October 16, 2012 Share Posted October 16, 2012 planey why would the early Airbus A-300 only get off the ground due to the curvature of the earth? ALL modern twin engined jets have excess performance on two engines and do most take-offs on reduced thrust for economic reasons perfectly legally. They are all certified to the same standard for climb gradient in various situations, and are overpowered except at high and hot aerodromes. Is 108,000 lbs of thrust not enough? Nev Link to comment Share on other sites More sharing options...
Guest Howard Hughes Posted October 16, 2012 Share Posted October 16, 2012 Maybe H.H., when your'e an old fart like me, you remember the things from the Mk1 of everything! I hope I do! Link to comment Share on other sites More sharing options...
boingk Posted October 16, 2012 Share Posted October 16, 2012 Is 108,000 lbs of thrust not enough? Nev When your MTOW is 170 *tons* then it starts to look a bit p!ss weak. They are rated for a max takeoff of 2600m though, so I don't really know what the curvature of the Earth has to do with it. Fairly sure all airplanes need to be able to maintain a sustained climb of at least 3 degrees to be passed as a compliant design, anyway. - boingk Link to comment Share on other sites More sharing options...
eightyknots Posted October 17, 2012 Share Posted October 17, 2012 When your MTOW is 170 *tons* then it starts to look a bit p!ss weak. They are rated for a max takeoff of 2600m though, so I don't really know what the curvature of the Earth has to do with it.Fairly sure all airplanes need to be able to maintain a sustained climb of at least 3 degrees to be passed as a compliant design, anyway. - boingk 3 degrees is very little, only marginally bit better than relying than the curvature of the earth for a successful take off roll. A 3 degree angle is as follows: Link to comment Share on other sites More sharing options...
ayavner Posted October 17, 2012 Share Posted October 17, 2012 pretty sure it was just a joke. Link to comment Share on other sites More sharing options...
boingk Posted October 17, 2012 Share Posted October 17, 2012 Yeah but still... humans accomplish some pretty amazing things and sometimes theres that 'gray area' where you're not really sure of fact from fiction. Whats the 3deg picture demonstrating it in reference to? An iPhone? Laptop computer? - boingk Link to comment Share on other sites More sharing options...
facthunter Posted October 17, 2012 Share Posted October 17, 2012 They have to do that on ONE engine so with double the power they go OK. A four engined plane has to do the same on 3 engines so on four it does not go that much better. Nev A four engined plane goes better with two out than a twin does... Nev Link to comment Share on other sites More sharing options...
boingk Posted October 17, 2012 Share Posted October 17, 2012 Good point Nev, did not consider that prospect. - boingk Link to comment Share on other sites More sharing options...
eightyknots Posted October 18, 2012 Share Posted October 18, 2012 Yeah but still... humans accomplish some pretty amazing things and sometimes theres that 'gray area' where you're not really sure of fact from fiction.Whats the 3deg picture demonstrating it in reference to? An iPhone? Laptop computer? - boingk Just another illustration to demonstrate how shallow a 3 degree angle (and hence a 3 degree climb) looks like. Link to comment Share on other sites More sharing options...
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