재미삼아 보세요 (그냥 누가 쓴거니까 너무 믿지는 마시고요) 더자세한 내용은 해당 사이트에서 보세요 Fighter aircraft engine comparision
Introduction This article will compare several engines used in modern fighter aircraft: EJ200 (Typhoon), M88 (Rafale B/C/M), RM-12 (Gripen A/B/C/D), F-135 (F-35A/B/C), F-119 (F-22A), F404-GE-402 (F-18C/D), F-414-400 (F-18E/F, Gripen E/F), AL-31F (Su-27, Su-30, J-11).
Thrust to drag Since frontal area dominates drag, and engine frontal area dominates aircraft frontal area, thrust to drag ratio will take a form of thrust divided by the engine frontal area (inlet diameter used). EJ200: 3.848 cm2, 90 kN, 23,13 N/cm2 M88-2: 3.805 cm2, 73,9 kN, 19,42 N/cm2 RM-12: 3.948 cm2, 80,5 kN, 20,39 N/cm2 F-135 (CTOL): 10.715 cm2, 191,35 kN, 17,86 N/cm2 F-135 (STOL): 10.715 cm2, 182,4 kN, 17,02 N/cm2 F-119: 6.136 cm2, 164,58 kN, 26,82 N/cm2 F404-GE-402: 3.959 cm2, 78,7 kN, 19,88 N/cm2 F-414-400: 4.745 cm2, 97,37 kN, 20,52 N/cm2 AL-31F: 6.433 cm2, 122,58 kN, 19,05 N/cm2 AL-41F: 6.433 cm2, 175 kN, 27,2 N/cm2
As it can be seen, EJ200 has the second best thrust-to-drag ratio after the F-119, while the F-135 has the lowest thrust-to-drag ratio. EJ230 has a ratio of 26,9 N/cm2, while the F-414EPE will have a ratio of 24,62 N/cm2. M-88ECO will have a ratio of 23,65 N/cm2.
(This is one of reasons why single engined fighters typically have better peformance than twin engined fighters despite lower thrust-to-weight ratio. Engine frontal area is one of major contributors to drag in all “normal” flight conditions. Taking two engines that use same technology and general design, frontal area – and drag – will increase with square of dimensions’ increase, while weight – and thus thrust – will increase with cube of dimensions’ increase. Engine that is 20% larger in all three dimensions will have 44% greater frontal area and 72,8% more weight and thrust – thus its thrust-to-drag ratio will be 20% greater than that of the smaller engine. If engines are of the same size and characteristics, then twin engined aircraft will be larger and have higher inertia and inferior transient performance. This of course assumes identical design goals and avaliable technology. For example, F-119 is 239% larger in volume than the EJ200, has 59% greater frontal area and 15% better thrust-to-drag ratio.).
NOTE: M88-2 has been tested at 18.700 lbf in 1990, which would give it 21,86 N/cm2.