SAAF JAS-39C Technical Data and Discussion

Weight is proportional to mass. And mass is a big factor in determining the turn radius, which determines your turn circumference at any given speed. A smaller circumference at any given speed results in a higher rate.

It does not affect the sustained turn speed. But it makes the circle smaller, increasing rate.

This is one small piece of the puzzle, doesn’t take flexing a degree to figure this stuff out. What we lack is solid information on the jet, and it would only be partially solved by a CFD model. Until someone goes to that length, we have little to go off of but public sources.

I trust Gaijin has done an earnest job modeling the aircraft with the new information we have forwarded. I see no point in this argument from which y’all are discussing formulas and not the data that would be useful within them.

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Agreed.
Hope I find some good stuff in the books. I just ordered another different 192page one on the Gripen from 2003. Really hope it’s not just a picture-book or something lol

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Ask your engineer friend…

Actually speed is function mass and acceleration.
T−D=m⋅a

a=dv/dt (delta v, delta time)

T-D=m*(dv/dt)

T is the thrust of the engine,
D is the aerodynamic drag force,
m is the mass of the aircraft,
a is the acceleration of the aircraft.

From equation you can see if you raise mas you need increase thrust or lower drag to sustain speed.

ok then explain to me cases like F-5E having a TWR of 0.73 at 50% fuel and 2 x aim9, beating a mig21bis in same config having a TWR of 0,945. oh and the F-5 has a better STR than the mig21 in the same conditions.

For real…

I can explain it to you with all math behind it. But your altitude and your friends to my person it’s just awful. And I just feel that it’s will be waste of my time.

But your friends are experts here so probably can explain it to you…

since the first time i asked you answered me smelling with entitlement.
now don’t be a coward trying to cut it up with a simple “huh i can explain but you’re a waste of time so bye bye”

again, one last time, can you explain to me why the F5E has a better STR than a mig21bis despite it having a lower TWR? or should i ask to someone more polite than you?

This is because the F-5E is overperforming severely.

i should clarify, i’m talking about irl data, not in-game

Depends on airspeed, the MiG-21bis technically beats it at low speed and instant turn rate.

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yes, i took this as a reference, you have a wide range between mach 0.5 and 0.8 where F-5E does have a superior STR than mig21

considering the lower TWR it is quite a performer amirite?

I have a suspicion that this guy doesn’t seem to like confrontation much @draghettoverde
You’re just wasting his time lol

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I’m not sure how ro answer you… Why do you keep using random formulas? That One Is from the straight Flight with either acceleration or deceleration… In a sustained turn (by hypotesis with no acceleration or deceleration) T=D hence they do not contribute on the maneuver performance… And Just to point out your statement before about glidersalways loosing Energy, you might find interesting slope gliders that can reach low transonic Speed with no engine and accelerate in a turn :/

that’s quite… dedication sir

I feel like the F5s are just a hot mess at the moment and shouldnt really be used as benchmark. Among other things, their afterburning engines are colder than that of a Harrier at less than 90% throttle.

So please i would love to know how Thrust affects turns in a Plane with no engine

it was my bad that i did not specified i was talking about irl data, as the graph posted by Mig23M

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Ah okay.

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The wings are straighter, more efficient than that of a delta wing with additional properties such as leading edge root extensions, leading edge flaps. This is a no-brainer. The low speed T/W disparity allows the MiG-21bis to produce better performance, however… slightly.

yes yes and yes, that’s why i’m still crushing my head with the TWR thing because, of course, TWR isn’t everything! the F-5E is a case of a more efficient aerodynamics, something something we could see on gripen too, instead of whining it can’t do 20°/s because “hurr twr low”

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