View Full Version : Maximum trijet mass
chornedsnorkack
11th Oct 2005, 10:49
The heaviest twinjet is, I think, Boeing 777, with up to about 350 tons MTOW.
Probably because it is not possible for one engine to propel a bigger plane. Boeing 747 and Airbus 380 are quadjets and Mriya is a sexjet.
Can a big engine be mounted in the fin? And could a Boeing 747 or Airbus 380 derivative be built with three engines?
Preston Watson
11th Oct 2005, 11:18
DC10, B727, L1011 Tristar have a engine on the tail-fin.
The L1011 max weight I think is 211 tons. Engines are wing mounted these days as maintenance is cheaper and easier.
Airliners wound't use only one engine due to ETOPS, safety, performance and reliability issues.
chornedsnorkack
11th Oct 2005, 11:39
The L1011 max weight I think is 211 tons.
And that of MD-11 is 285 tons.
Airliners wound't use only one engine due to ETOPS, safety, performance and reliability issues.
Sure. That is why 2 is the minimum. But a plane with 1 engine out of 2 inoperative has 1/2 the total installed thrust, whereas a plane with 1 out of 3 inoperative has 2/3 of total and a plane with 1 out of 4 inoperative has 3/4 of total.
Isnīt the maximum size of twinjet defined by what one engine can climb out with if the other is inoperative? Rather than by the available total thrust of 2 engines?
Groundloop
11th Oct 2005, 12:03
"DC10, B727, L1011 Tristar have a engine on the tail-fin."
Actually the DC-10 and MD-11 have an engine mounted in the tail fin.
The TriStar and 727 have the engine in the rear fuselage with the intake in front of the fin with an S-duct down to the engine.
Mriya is a sexjet.
Never a truer sentance written...
Sorry for the drift.