I can see two flaws with this line of reasoning:
1) it lumps all the US design houses into one undefined block. It’s as if one talked about EU-designed planes instead of BAE, Saab or Dassault planes.
2) it tries to group vastly different designs under the “canard” terms. The reality is that there is almost nothing in common between the X-31 (Delta+canards) and the X-29 (inverted wings + canards) formulas so they don’t count as “more design experience”.
The X-31 Rockwell-MBB is nether nor a clean US design nor a clean Canard.
Or is MBB a US-company?
The Carnards on the X-31 are the most time freefloating and only used for steering impulses at high AoA for recovery (after a TVR failure).
Freefloating mean aerdynamical more ore less non-existent and produce only zero lift drag.
Dr. Wolfgang Herbst MBB (Promoter of the TKF-90 and Poststall manoeuvres) was the Snake desinger and the Snake was the base of the X-31. First has the X-31 (Clean Delta) no Canard but the windtunnel test shown that the avaible pitch down moment at high AoA was to low for a secure recovery. High AoA may be end in a super stall without a Canard after a TVR failure.
A pitching moment is a pitching moment. If the applied pitching torque is the same, the plane will pitch up at the same rate regardless if that moment is ahead of the CG or behind it. Basic physics.
Some error in reasoning, we speak about planes and not cars.
We should not forget when we turn then we bank then a change in the the axes appears.
The Canard acts then with positive force and a tail produce then negativ force. This lead to more bleeded engergy for a tail and tailless fighter (static stabil Mirage 3, F-106) and lead to a lower energy loss for a Canard (static instable or static stable). A Canard must not always counter the the pitch up moment that can do the Elevon and the Elevon produce then lift.
When we bank then the the Canard is only used and produce positve force and a tail produce negativ force.
The needed AoA is then lower as for a tail fighter in a banked turn.
The Canard enhanced the inflow on the fin no additional auxiliary crutches for high AoA needed like ventral fins (F-16 etc) or two fins (more drag and RCS penalty more weathered skin and a leading edge more).
The FCS for a Canard fighter (static instable) is more complex as for a tail fighter.
Well. This accident occured 17 years ago, and Saab learned alot from it. The crash even caused the Eurofighter first flight to be delayed. I haven’t heard of an FCS failure in operational Gripens, so either the system is very safe, or the free flow mode works as it should. 🙂
Not really a PIO more the FCS software failure was rudimentary the pilot can’t make crosswind correction and this ends then in the PIO.
This and the YF-22 crash through PIO caused the Eurofighter first flight to be delayed. The Eurofighter GmbH mean it’s sure better fly not with an rudimentary software like Gripen and Pre-Raptor.
In war the Raptor wouldn’t been in the situation presented in the first place. In training there are rules for a reason. You don’t risk 2 aircraft/aircrews to try and prove a theory.
I think when a F-22 pilot forced to WVR then has he made somewhat wrong.;)
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.
For one pixel detectors sure, but modern IR seekers use IR-TV with other IR bands.;)
Then attenuates the coating not the IR emissions, it’s traslate the IR emissions to a other band. Or your F-22 dies on a heatstroke and cooling problems has the F-22 enough.
I’d be interested in seeing that quote.
I’d be interested in seeing that too. And please don’t trot out that ancient picture of a Super Hornet getting a fleeting glimps of a Raptor in it HUD by busitng the rules of engagement (yeah, that’s well known too).
You think on war time snipes no one under 300ft? Some gun kills happen just under 100 feet distance. Some Kamikaze make 0 feet kills.;)
F-16A Block 15 sustained is:
9G at Mach 0.9 at 3000 feet
7G at Mach 0.9 at 11000 feet
5G at Mach 0.9 at 20000 feet
3G at Mach 0.9 at 34000 feet
1G at Mach 0.9 at 55000 feetSo Block 15 would be roughly 6G sustained at Mach 0.9 at 15000 feet.
Only have one sustained figure for F-15C
5G at Mach 0.9 at 25000 feet.The real question is – will the F-35 EODAS cueing make a sustained fight necessary?
Anyone have similar figures for the Su-27 and/or MiG-29?
Sure the the F-35 is at the hight of 70th designs.
But some Eurocanards reach ~7g at Mach 1.5 without speed loss.;)
I see that you continue to compare the F 35 with a clean Rafale/Gripen. Yes, those little planes offer a superb performance… in an airshow. 😀
Load them with even a moderate combat load and see what hapens.BTW, the max. speed of the production F 35 will be 1.8M.
Maybe, not yet achieved. But Mach 1.67 is production standard 240-3.:rolleyes:
This “fat’ baby will still outaccelerate a slim Rafale/Gripen…
This is doubtfully with a T/W of 0.84 to 1.04 and only Mach 1.67 for a F-35A.
A sustained turn capability of 4.95g at Mach 0.8 and 15,000 ft is not really good.:rolleyes:
considering the “front section”, according to these drawings, simply through a area measurement in photoshop it comes out that:
Typhoon has 11% less frontal surface
Rafale has 7% less frontal surface
Super Hornet has 25% more frontal surface.however, if you’re to measure the frontal surface of an aircraft for what counts (transonic area rule), I doubt that the F-35 will be very happy with that.. it’s easy to see that there’s no section reduction at the wings section, which means it has a pretty nasty “peak” that will increase its drag in transonic.. it will overcome that drag through high thrust, but that means it will gulp fuel as if there was no tomorrow…
basically, it has to stay subsonic
But in fact since Jones supersonic area rule use nobody the Frenzel-Junkers transonic area rule. The sweep angle of the Mach cone is used for make the cross section distribution. This shift the wing aftwards and the wesp tail frontwards. 😉
How many safety valves go open every day?
I can remember me on a event where all tires blown on a B747 after a emergency stop. :rolleyes:
Yes, but the 777 comes with multiple engine options, I’d guess that the 380 only has one gear supplier.:D (Also, if it were engine problems, how much of that can you lay at Boeings feet?).
Because of its size, the A380 will attract media attention (because of its potential for a large loss of life should there be a serious mishap) a minor fault/occurence that would go unreported on another type will make the news.
It was like that in the early days of the 747 and Concorde.
And any new aircraft in the future will also face media scrutiny.
What will be only once when a Chinese rice bag falls over in a B787.
I found that here:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.107.177&rep=rep1&type=pdfand my head is still hurting from the levels of mathematics involved 😉
The funniest thing I saw was on the title page:
Why is someone getting a Doctorate in Philosophy writing a paper dealing with high levels of Mathematics and Engineering.
The PhD or equivalent has become a requirement for a career as a university professor or researcher in most fields.;)
A lot of the EM radiation – relative to other stealth designs will not be scattered but rather absorbed.
RAM works on specific frequencies and tends to by heavy and tick as lower the frequencies is and is useless below 2GHz. In the F-117 was the RAM task more simply. MTI use not the real doppler shift but the doppler phase shift and the most to counter Radar used anlog computers. But how Fansong was feared, we see it on the Marines comando raids prior to the F-117 flights or the need of Grumman A-6 Prowlers and wild weasels. MTI has another weak point it’s can’t detect target flying on the radial, but more and more MTD are used. No blindspeed, real Doppler, no radial hole.
For what air policing are good.
A KC-10 and two F-117 and an resounding slap for the USAF.
http://www.airpower.at/news02/1023_f-117a/index.html