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Old Aug 29, 2005, 06:08 AM
Tanguy&Laverdure is offline
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Originally Posted by allintheair
and finding the new C.G. for the modified wing

The Su-27 on the other hand cannot achieve full AOA and G ratings until internal fuel has been reduced to 60% ( (assuming that the maximum fuel load has been carried), meaning that a long range mission must account for not being cappable of efficent close-range combat until 40% of the fuel has been used. The technical reasons behind this limitation are simple; when fuel is reduced to by 40% the No.1 fuel tank, located behind the cockpit, and the No.4 tanks, located in the wings, are emptied. The importance of this lies in the No.1 tank which when full has an adverse affect on the plane’s center of gravity, moving it forward of the optimal balance. Thus when it is emptied the plane’s manvering cappabilities rise sharply. This fact means that the mission planning has to be very precise when it comes to the fuel – which is easy during training, but something almost impossible under real combat circumstances. In the case of any kind of unplanned engagements the plane has to get rid of fuel overload; jettisoning BVR missiles is also a very real possibility as they constitute a weight and aerodynamic penalty. Only once the Flanker is lightened to a certain extent it is highly maneuverable. However the Su-27 does possess an analog fly-by-wire system, something not employed by the MiG-29.
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