Сравнение Грипен с Ф-35.
http://www.brighthub.com/science/aviati … 2.aspx?p=2
The F-35 Lightning II is the result of the Joint Strike Fighter development project initiated by the United States and backed by a range of nations including the United Kingdom and many current users of the F-16. Built by Lockheed, the same company that now owns the F-16 production lines, the JSF project was always intended to replace the aging F-16 much as the F-22 Raptor is now replacing the F-15 Eagle.
Gripen and JSF Matchup - Structural Analysis
Physically, the F-35 is larger than the Gripen. JSF length and wingspan exceeds that of the Gripen fighter by several feet in each dimension, although the JSF is slightly less tall than the Gripen. The Lightning II is over twice as heavy empty as the Gripen - JSF fighters are also more than twice as heavy as Gripens when fully loaded. Of their respective weights, the Gripen is about 40% airframe and 60% fuel and ordnance, while the JSF is about 42% and 58% respectively - actually this indicates the JSF is composed of more composites and other advanced materials than the Gripen as it is physically larger than its competitor.
The F-35 also flies cleaner than the Gripen, JSF aircraft have two built-in internal weapons bays which adds to their stealth and aerodynamic capabilities. These bays can carry around 3000lbs of ordnance in total, and when external hardpoints are utilized the JSF can carry about 9 tons of ordnance.
Gripen - JSF Performance Comparison
The playing field levels significantly when the performance characteristics of the Gripen are considered.
The JSF uses a single Pratt and Whitney afterburning engine, just like the F-16, but can only fly at a speed of about mach 1.6. Its thrust to weight ratio when fully loaded with fuel is only about .87 - significantly less than the Gripen. JSF fighters can achieve a better thrust-weight ratio when carrying half the usual complement of fuel - around 1.07. But if it is viewed as a matter of averages, the thrust to weight factor of the JSF has to be considered to be similar to the Gripen at best - and this with a lower overall speed.
The JSF wing loading factor is in the 90lbs/ft^2 range - significantly less than that of the Gripen and less as well than the F-16 it is meant to replace. In truth, this wing loading factor is higher than that of most fourth generation combat aircraft including the F-15, SU-27, and Mirage 2000. This wing loading factor disparity means the F-35 is significantly less maneuverable in a turning engagement than the Gripen.
JSF fighters have a higher service ceiling but only a slightly better combat radius than the Gripen - and this is on full fuel, which means that the thrust-weight ratio is on the low end during the initial stages of a patrol. With impending upgrades to JAS 39 in the form of the Gripen NG the avionics, radar, and other tech in the aircraft will likely be similar - but of course the JSF has advantages in payload and stealth.
Gripen - JSF Final Word
The JSF can fly higher, carry a heavier payload, and is stealthier than the Gripen. JSF fighters can also fly longer and farther.
The Gripen retains advantages in maneuverability and cost. It is lighter, with a smaller airframe and proven low production and operating costs. The JSF couldn't hold a candle to the Gripen in a turn, and aside from the max altitude advantage it appears the Gripen would out-climb and out-accelerate the JSF in most circumstances.
In the final analysis, it has to be recognized that the JSF was designed in an era where air-to-air dogfighting has become less of a focus for the United States. The JSF is meant to be a stealthy bomb truck with a legitimate aerial self defense capability. The Gripen is meant to be a rugged, lightweight combat fighter for airspace defense. Different fighters with different purposes will, in the end, be popular with air forces depending on their need.