Re: Avro 722 'Atlantic'
Posted: 23 Jan 2009, 04:30
There are several issues, but in general, the pylon arrangement is the best for several reasons, chiefly being that such an arrangement is very simple to construct, simple to maintain, and has the added benefit of adding protection in case of an uncontained failure. The major problem this creates is that airplanes tend to get taller, something not always desirable in an aircraft servicing small airports. This is why the DASH, ATR, ERJ, and CRJ series are designed the way they are. They use high-mounted wings or tail mounted engines to allow for easier servicing at less-well equipped airfields. The drawback for the CRJ and ERJ is only that they are very tail heavy and thus require much more strict weight & balance to be observed than with aircraft which have engines mounted closer to the natural center of gravity.
Many people don't realize this, but on modern designs (747 onward), the use of pylon mounted engines has actually allowed aircraft designers to make the airplanes LIGHTER because they can use the engines as part of the load relief on the wing, thus allowing them to build the wing lighter and more flexible.
Many people don't realize this, but on modern designs (747 onward), the use of pylon mounted engines has actually allowed aircraft designers to make the airplanes LIGHTER because they can use the engines as part of the load relief on the wing, thus allowing them to build the wing lighter and more flexible.