Several problems there-
A- it’s been quite some time since I had the material to look at
B- I’m pretty sure scanning it would violate copyrights
LOL, kid…get real.
With all the interest for VLO a/c not just in the US but also in Israel, the UK, Japan, Russia, India, South Korea, Australia, etc. etc. it seems to me that the “ECM” we’ve got today cannot really be called “active stealth”.
And why would France launch a program to develop “active stealth” if they already got it?
ECM means Electronic Counter Measures and is by definition “active stealth”.
So, “active cancellation” f.e. is an ECM measure as well, in spite of differentiation in nomenclature.
Today we have active towed decoys, radars with jamming functions, etc…all of this constitutes ECM and it will indeed make a difference in modern/future warfare.
Passive, so called “5th gen” stealth is nice option, as long as the price payed for it isn’t too high, unlike F117, F35 and to a lesser degree F22, have payed.
However, programs for modernization jamming equipment are permanent and even F22 that was originally envisaged without any jamming equipment whatsoever is scheduled to receive it and US made a tender for ALQ-99 replacement.
This unambiguously shows current level of threat and VLO platforms’ ability to remain unseen against modern SA/AA systems.
@Wrighwing,
get back into your lane.
They weren’t online sources, so unfortunately that’ll be problematic.
Ah, I see…
So why don’t you just scan them, then?
That should be simple enough…
Based upon figures that I’ve seen on more than one occasion, and from multiple sources.
Great, then you wouldn’t mind presenting those documents here…
So basically the USAF/USN/USMC could’ve saved a lot of money by just putting more jammers on their legacy aircraft, as this would be just as effective against late model SAMs?
LOL Wrightwing, let’s not get into this again…:D
If you have figures that differ significantly one way or the other, I’d love to see them.
Yes, I’ll show them all right, but I haven’t made an assertion here.
You did and I’d like to see based on what?
One question remains though; Would it be technically feasible to develop “active stealth” to such a level that it could actually “hide” an a/c from the radars as effectively as passive stealth?
Yes.
It’s called ECM.
So, perhaps the combination of instability and canards allows for similar or better sustained turn rates with a lower TWR? It does seem to be the case.
It does (other parameters being the same) and that’s the whole point, of the concept (to mitigate delta’s drawbacks).
Well the Mig-31’s top speed clean is ~M2.8, but with missiles it’s limited to ~M2.3. The F-15’s top speed is ~M2.5, but with missiles it’ll only see ~M2, so you can see that the drag penalty isn’t insignificant.
Do you have any data to backup this “knowledge”, on F15?
USAF, for one, doesn’t concur (as have been presented on this forum several times over) and they operate the model.
So in the current peace time setting the F-22s max TWR is 1.70.
Maybe you should recalculate these figures.
LM doesn’t concur with 37k engine and neither does the USAF.
This reminds me of AF-1, which doesn’t weight 29k lbs (2008 figures), but ~24k (pre 2008 figures), although noone actually documented that (and for a good reason).
Let’s not indulge fanboy’s dreaming, here…
Now you can say that oh, there was one less unit ordered which accounted for higher costs but c’mon that’s part of the reality. Costs are by default going up due to miscalculated estimates and schedules all around – as to which they will continue. So we really can’t spin that as an excuse. A trending increase is an increase no matter what the unexpected reasons.
Yes well, this is a constant problem with this Spudman character, here.
He thinks that it’s somehow Congress’ fault for allocating too little money for purchasing less units, which results in unit’s price increase, when in fact the LM already spent too much money on R&D, for the given FY and therefore can’t deliver predetermined number of planes, in the first place…
It seems that F35 is built around Harrier replacement requirements primarily, hence such a short and stubby design (to fit assault ships and meet range/payload KPPs).
To ditch a “B” model, would be to kill a reason of F35’s entire (problematic) design and F35B is still, the most capable VSTOL plane on the market.
AF and N, which have different size requirements than MC, may have (and probably would have) gone for longer, more slender, designs which behave considerably better in the air, if there was no “B” model.
So, it seems that B model exceeds Harrier performance KPPs and should be the only one, let enter op.service.
A/C models are problematic compared to F15/F16 and F18, respectively.
And let’s not even get into A10 replacement attempt…
Yeah, alright… HERE‘s “drag management” for you:
Exactly.
Here’s a typical high g wing behavior of RSSed canard plane…

…compared to typical RSSed tailed plane.

Compare the amount of trimming on both planes and consequential wake.
Note, however that canard plane can put canard into neutral and command trailing edge down, if necessary, but tailed plane can’t put elevators in neutral and command nose down.
Flankers, Fulcrums, Eurocanards, the F-teens… NONE of them can come close to that level of performance with a comparable AtA load.
Which performances, would those be?
Question: Are the canards themselves contributing to lift when/if they’re busy holding the nose down? If they aren’t, then just how relevant is any alledged “positive” effect they might have on the wings?
The stabs on unstable wing-tails LIFT the butt of the plane to keep the nose down. LERXs and slats contribute to airflow management (LERXs also add to overall lift area). It’s a win-win in terms of lift.
Canarded planes work both ways and elevatored don’t.
So, you can put canard into neutral and command wing’s trailing edge down, which essentially puts you in the same class as tailed planes (F16, or F22).
The difference is in drag and what the elevator contributes to the overall lift, most likely gets eaten by drag in the end.
This is why canarded plane’s FCS is set to rather push the nose down, than tail up.
First of all, “drag management” takes a back seat during subsonic ACM, especially if your’re a 4th gen. fighter carrying a draggy combat load. Second, if you accept the fact that unstable canard-deltas are DOWNFORCE-lift platforms, then it’s in the lift efficiency department where canard-deltas fall short compared to unstable wing-tails. The entire F-22 basically acts as a big wing. It doesn’t rely on downforce to keep its nose in check.
Actually no and drag management is crucial in all flight regimes, down to touchdown (and later during aerodynamic braking, in addition to wheelbraking).
F.e., M2000 flies exactly like the elevatored RSS plane (basically a big wing, as you put it), while Rafale has another momentum point added, which enhances its control configurability in different flight regimes.
@em745,
look I’m trying to explain how does this work, since a few pages passed with partial arguments, but no real answer…
You obviously know basics and I’m expanding that, since basics don’t tell the whole story and, as usual, there’s a whole world, beyond the obvious.
Please! Given how aerodynamically dirty even a “clean” Tiffy* is compared to an F-22, I’d steer clear of any “draggy” points of contention:
Canarded planes don’t deploy flaperons (as per photos) and in EF’s case, canards are so far forward compared to Cp at high alphas, that it likely takes the least force (drag) to trim the plane in maneuver, out of all Eurocanards, let alone tailed aircraft, like F22.
Anyway, just take a look at the photos (on page 2) and examine EF wing’s trailing edge configuration and compare it to F22’s.
Again, canarded aircraft can command trailing edge down as well for increased lift (same as tailed planes and can exercise DFC, which tailed planes can’t, BTW), but as you can see, the FCS engineers opted for pushing the nose down, instead of tail (trailing edge).
This is most probably due more efficient drag management in sustained maneuvering.
I never claimed 50° for the Hornet. 40° min, was what I found for Shornet, which is still more than eurocanards… And NO, it does NOT stall at that angle.
Doesn’t matter what number exactly and 40° is highly unlikely, too.
Do you have some actual data on this, apart from nonparametric alpha limit given in publications?
That is the type of statement I would expect from someone who does not understand the technology involved.
Have you ever wondered why the F-22 has a sliver sheen when viewed under certain lighting conditions? It is a phenomenon of the low emissivity coating that attenuates IR emissions. That is why IR seekers have difficulty achieving lock-on.
Interesting…numerous articles (like this one), seem to relate “silver sheen” to actual Silver in RAM, which has a function of ensuring uninterrupted conductivity, all over the plane’s surface (purely RF usage).
How do you propose to mask IR signature with a material of Silver’s specific heat capacity?