Ye, the report on the Su-27 maneuvering capability compares it to the F-15 and has a similar conclusion.
However, they also say that this difference in optimal speeds gives the Su-27 an advantage, as flying at high G is not sustainable for the usual duration of the dogfight, in their opinion (i.e. the F-15 pilot would be under a lot of strain and might not be able to sustain the optimal performance).
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The F-15 can go above 9G, in instant maneuvering it can help, in steady turn 9G is too much. Additionally, steady state 9G turn can only be achieved near the ground for all aircraft.
In a manoeuvre fight of these aircraft, the pilot decides, not the aircraft. The pilot makes the plane.
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you need to measure the exponent nx=f(Mach,G). and then you will see where the plane is slowing down and where it is accelerating
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My problem is flying at constant G to measure the change in speed accurately. I keep jumping ±1G.
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I can try to do it as well, mind posting the relevant charts?
Pages 15-17 for the 1G, 3G, and 5G graphs, full burner
Interestingly, page 26 provides the 5G graph with some of the speed loss regions included.
Page 13 - Instantaneous turn
Page 14 - sustained turn, full burner
Speed is given in TAS. The aircraft weight is not mentioned explicitly, but the wing loading is given as 305\ kgf/m^2. Given the wing area of 62\ m^2 (I think that is the figure, but not absolutely sure) we get the weight as 305 \cdot 62 = 18910\ kg.
The loadout is 2 x R-27 and 2 x R-73.
@BBCRF, do you know what С_{у_{доп}} stands for?
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Just a detail, the values for F-15,16 and Tornado are calculated according to what the Soviets/Russians knew.
Do you know the date of the article ?
dunno, but the graphs are taken from the Su-27 technical manual
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I wonder why that is…
I see many other people trying to do so peacefully… yet, some keep disrupting the thread and turning it into personal attacks…
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Thread cleaned a bit… and Trouble makers have a few days off from the Forum…
So, should be peaceful and free from those that keep turning this into a pissing contest… for a few days at least…
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What happened?
You remember what happened in the mig-29 thread? That.
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I can neither confirm nor deny that the charts are from the Su 27 manual. I don’t know. It could be calculations, or prototypes, or a production Su 27.
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The permissible coefficient of lift. That is, at an acceptable angle of attack.But not on a critical level
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If we talk about maneuverability, the Su-27 significantly surpasses the F-15, F-16 to speeds of 700 km/h
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It agrees with the opinion from a friend, an RAF test pilot, but he says that doesn’t mean that the Su 27 automatically wins because the pilot is decisive. Curiously he would have taken the F-15 himself.
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Yes, you’re right, a lot depends on the pilot.However, if the pilot’s level is the same, the Su-27 is superior to the F-15
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In low speed yes, F-15 pilot must be significantly more experienced or otherwise better.
After a certain mach number they are equal and if the speed increases the F-15 is slightly better. It also has to do with the F-15’s emphasis on maneuverability at transonic speeds. Boyd’s theories apply to the F-15 as well as the F-16.
In the language of numbers according to subjective perception it goes something like this: below 375 knots the Su 27 is better , between that speed and M0,85 they are equal and above that speed the F-15 is at an advantage. Surely there is an influence of subjective bias and experience.
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