That is irrelevant. As someone else posted here earlier, there have been examples of fighters, delta ones no less, whoose wheel well is located exactly at the wing root.
See my subsequent post on that.
You’ll have to go a long way to find a fighter that put the wheels in the wing roots when alternatives were available…
Well, it’s certainly not the case with the PAK FA. The wheels retract to the airframe because that’s where their well is. It’s not like there is no other 9+ design with wells on the wing. Mirage 2K comes instantly in mind.
Good reason for it on the M2000… they have no where else to put it. 😉
If Dassault had any other decent option, they would have taken it. But they didn’t, so needed to compromise.
It is also quite a different wing – see below:

Note the distinct bulge in the lower surface of the wing along the wing root?
There to get the wheel in, and there to reinforce the surrounding wing spars through increasing the 2nd moment of area of the spars themselves…
The PAK-FA wing does not show an increase in thickness towards the root outside of the normal root:chord taper ratio (look carefully inboard and outboard that weapon/sensor bay to see the lower surface is roughly aligned).
You can of course pick out other examples, but there will be mitigating reasons for choosing to put the wheel well where it is. It is a compromise any structural designer will go a long way to avoid making. With the PAK-FA airframe, its a no brainer to pack them into the engine intake sidewalls.
Just the wisdom of an all stealth aircraft force is questionable, because some day in the futur the developments in radar can change the rules again.
I broadly agree with what your saying, but I would qualify that to “the wisdom of a force reliant on stealth as its only advantage is questionable”…
Although, I think thats what you really meant anyway. 🙂
Stay serious.
Sens, that was a big piece of irrelevant rubbish.
Bottom line, radars don’t kill people (yet), missiles do. A pilot has to react to a missile coming his/her way, even if the Pk is low… continue to fly wings level and that Pk will start rising dramatically.
The pilot doesn’t have to do jack sh!t when a radar is pointed at him/her.
The main wheel retracts into the WING ROOT
Are you nuts?
On a 9+g fighter, you are seriously trying to suggest they would have a wheel well at the wing root instead of structure?
My calculated radius is ~1,378 km or a total distance of ~4,330 km. With a constant speed of 926 km/h (~258 m/sec) the 360° are covered in ~ 17 seconds. By that I do come to a two digit value.
Just a rough calculation after a bad feeling about your 5,4°/sec sust. claimed.
Maybe you can correct me.
Just double checked…
I used 4.95G in the eqn; radius = v^2/[g * tan(bankangle)]
I should of course have used g = 9.81 m/s^2
Thus the actual sustained turn rate is ~10.6 deg/sec – which is more sensible… if still not spectacular.
edit: For comparison;
MiG-21: ~9.5 deg/sec
MiG-23ML: ~ 14deg/sec* (other sources suggest 8.5 deg/sec)
F-16C: ~ 14deg/sec (although I’ve seen numbers as high as 20deg/sec at sea level)
M2000: ~ 13.5deg/sec
*not certain
You claim was a 2,7 km radius or a total distance of ~8,486 km, which is covered with 258 m/sec = ~ 33 sec for a full circle of 360° = ~11°/sec sust. and not your claimed 5,4°/sec at least. 😉
My radius is wrong, it should have been 1.4km…
(at a 2.7 km radius, the total circumference is 2*pi*radius = 17km – which would still be 5.something deg sec)
You missed the related speed and by that the sustained rate is much higher.
Related speed?
Are you talking about ground speed? (the equation for turn rate uses airspeed does it not… )
(I should have pointed out that the calc was also done at Mach 0.8 @ 15,000ft, or ~258 m/s)
You do not fire an expensive AAM without the intention to hit a target.
At the potential cost of an even more expensive aircraft?
I know which I would do…
The RWR does alert the opponent already, when your fire-radar designated the opponent.
Assuming you are firing radar guided missiles (thus need to track via radar).
Also, from the perspective of the other pilot; knowing you are being tracked, and knowing there are incoming missiles are two different things. You can choose to ignore the former to concentrate on other more immediate tasks (such as getting your own shots away, dropping bombs, critical radio reports… whatever), you simply cannot ignore the latter.
Even when you do a “ripple fire” by a pair of AAMs, which the Russians do prefer, you hardly spent 6 AAMs during an engagement, because non will stay longer than two minutes into an engagement most of the time.
Maybe… maybe not.
For me, I would not be prepared to put down $300 billion on that. But, I suppose that is personal opinion, and everyone is entitled to their own.
x2 I’d add to that all the whining and chest thumping about how the Typhoon or Flanker can carry a dozen AAMs or whatever and “F-35 sux cause it doesn’t carry 12 like X” is absolutely assinine given that nobody has ever even shot 8 in combat (and I think 6 only once back in Vietnam with those $hitty AAMs that kept missing.)
You make a good point.
However be careful, the AIM-7 variant in question (E) had a very limited fire and forget capability along with poor maneuvering capabilities… there were also ROEs in place.
With an agile missile capable of fire-and-forget, and a “proper” war (i.e. not Kosovo, Iraq or Afghanistan), *POTENTIALLY* the firing of (multiple) missiles could be used just to put the other guy on the defensive while you move to a more favourable attacking position (or ripple fire to drain his kinetic energy avoiding the first, only to be left helpless to avoid the second).
IMO it is dangerous to assume the scenarios of one war will be replicated in the next (that is even more relevant given the time since Vietnam).
I think a relatively simple maxim would be; the more missiles you fire at the other guy, the better your chances of outright killing him or forcing a mission kill or being able to dictate the terms of the dogfight…
You certainly have a reading problem if that’s what you got out of what I said.
Perhaps in that case you’d like to re-interpret this for us…
Stealth is not a totally new field for the Russians.
Maybe you should do a little reading and save yourself some embarassment.
If you really want to stick to that topic: Where did that rumour come from? And when was the maximum performance envelope supposedly tested?
Went and checked… it was one of Carlo Kopp’s articles.
http://www.ausairpower.net/APA-NOTAM-300309-1.html
The sustained turning performance of the F-35A Lightning II was recently disclosed as 4.95 G at Mach 0.8 and 15,000 ft.
I’d be more interested in finding out who disclosed it (or rather, the job of the person that disclosed it – are they an LM employee?)
BTW – you don’t need flight test data to have an idea of performance – wind tunnel, CFD and equations can give a fair idea. [obviously you need access to data that none of us have!]
More googling revealed more data here:
http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/F35-030509.xml
The exact performance of the current F-35A configuration—also known as the 240-4—are classified. But a similar earlier standard (240-3) was credited with a maximum speed of Mach 1.67; acceleration from Mach 0.8 to Mach 1.2 at 30,000 ft. in 61 sec.; a top turning speed of 370 kt. at 9g and 15,000 ft.; and a sustained turn capability of 4.95g at Mach 0.8 and 15,000 ft.
I guess at this stage my question would be, what has changed between 240-3 and 240-4?
At this stage and without evidence or substantial backing by trustworthy people in the know, I would simply dismiss that rumour.
Well, the wing loading and T/W ratios are not great – that would not bode well for sustained turn performance.
4.95g is not a turn rate.
You can convert it if you want… all the necessary data is there if you assume an ISA day.
But yes, your right, g-loadings are not a turn rate, but in this case it might as well be.
[To save you the bother; At sustained 4.95G, the bank angle is ~78.35 degrees, the turn radius is just over 2.7 km and the turn rate is a mere 5.4 degrees/second]
Question:
I have heard rumours that the F-35 is only capable of a sustained turn rate of ~4.95G at Mach 0.8 at 15,000 ft.
Is this true?
[I don’t want answers talking about sensor fusion etc – dealing only with kinematic performance please]
And pretty much discredited as BS.
The article in question contained direct quotes taking about the Kirov’s reduced radar signature from a British military expert with 32 years experience working on “stealth techniques, radar, and electronic warfare.”
Thus, your going to have to produce some good evidence to back up your statement, otherwise, retract it.
Show me their stealth aircraft. I’m willing to give a benefit of a doubt, just cough up some evidence.
Oh, so the knowledge of radar reflectivity and absorption only applies to aircraft now?
You better tell the USN that they wasted large amounts of money in facets of the design of their Arleigh Burke class cruisers… better phone the Swedes while your at it… I gather they’ve been wasting their time on it for quite a few years now too.
Don’t forget, you are arguing the Soviets were totally unaware of the properties of EM waves and how to reduce the RCS of their equipment…. until the Russians were informed some time in the… 90s? (that is from your post earlier in this thread… but you can state a clear time before which you believe they didn’t have the knowledge of reducing radar returns)
That is the paper. He may have done all the other stuff after the fact but that isn’t what Lockheed used nor did the Russians use it at the time. Maybe the Russians do now.
Bill Sweetman has made comments a long time ago regarding the radar signature of the Kirov-class cruisers… when were they designed… the 70s wasn’t it?
Your being a bit disengenious suggesting the Soviets were completely ignorant of radar signature reduction techniques until relatively lately.