Ok,
@p2prada, which fighters today have best
demonstrated climb-rates ?
F-15, F-16, Su-27, Rafale, EF. F-22s climb rates are unknown, but it would be significantly high considering the powerful engines.
In terms of records, Su-27 has the most records followed by Mig-25 and then F-15. I suppose aircraft like Rafale and EF may break such records if they try.
J-20, I know has a good T/W ratio. But, could you please share which fighters excel in this parameter ?
Nobody knows anything about J-20.
Is climb rate alone, a decisive factor in dog-fights (which is going to stay, anyway) or, if such limitations can be overcome/compensated/negated by possession of other advantages ?
I wasn't talking about dog fights, but BVR.
Could you please share how the above two work, especially the High-Off Bore-Sight & which Indian/Chinese fighters are going to have that?
The advantage of a tiny aircraft were two pronged. One, it would have high T/W ratio because it carries less fuel and has powerful engines. Second advantage is that it is small and hence difficult to spot visually.
With IRST (and 360 degree radar in case of PAKFA), small size is less significant since electronics will take over the function of the human eye.
Small size did not help the Arabs against later generation Israeli fighters. That's because the Americans managed to install powerful engines on their aircraft that allowed them to exceed the capabilities of the lighter aircraft. With more powerful engines, even large aircraft can have T/W and flight dynamics that exceeds light fighters.
The only aircraft that has 360 degree IRST would be F-35, Mig-35 and Su-35. But Su-35 and Mig-35 have it as optional while the F-35's DAS will come as a standard fitment. No idea if 360 degree IRST capability is being looked at in the Super MKI upgrade. It seems like J-20 may have 360 degree IRST capability, but this is not 100% sure. FGFA will come with 360 degree radar and perhaps even IRST while PAKFA may come with the options for the same.
HOBS allows taking shots at wide angles. So the IRST is mated to WVR missiles which will give these missiles a 360 degree engagement capability.
Anyway tomorrows fight will mostly be BVR anyway. So most of the focus will be on fighting at a distance and avoiding IRST+HOBS engagements.
What is a 11:1 T/W ratio, never heard it before? It is usually expressed in decimals, right ?
T/W is Thrust to Weight ratio. So, when we say an aircraft has a T/W of 1.1, we actually mean 1.1:1 or 1.1/1, ie for even unit of weight the engine can exert 1.1 units of thrust. Since the denominator is 1, we generally skip mentioning it. The numerator carries what is relevant and yes it can be a decimal when exact values are calculated.
Early 4th gen engines were of the 8:1 and 9:1 T/W ratio class. Later 4th gen engines managed to scale up to 10 and 10.5:1. F-35's engines are of the 11.5:1 class. PAKFA will have three engines. One is a 10.5:1 class 117 which generates 147-152KN of thrust. It will be scaled up to 11-11.5 once with thrust at 165KN on production models. A stage 2 engine called Type 30 is in development. According to Saturn, the new engine will deliver 175-180KN of thrust and weigh 30% less than 117, which translates to a T/W of greater than 17:1.
The lower the weight and greater the thrust of the engine, the superior will be the aircraft's characteristics.