The reduction in angle of sweep is absolutely normal: less trim drag with decreased sweep angle thanks to better flow management (thinner airfoil at equal structural load, less chord for increased laminar section flows and better structural distribution). Old airbus had reduced sweep thanks to the less available trim level (centrally to rearward loaded). Those are inherited from old conceptual design requirement (and made them slower in cruise).
B/w nice doc. Thanks you for the time putting that together… and sharing!
does this include the Navy Rafale? I can’t remember this. Thanks.
Eagle1 would like to think that Hornet aggressive moves are as casual as a smoky diesel in Europe. That is not the case. The 80’s Hornet outperforms any beast (by far) outhere in term of AoA.
We are talking about (very) nearly twice (200%) of a Mirage2K, 50% more that the best estimate of a Rafale, 50% more than an Eagle, nearly twice that of Flanker (old)…
What an F-35 put on top of that (in term of high angle of attack maneuver)? As we can understand it today, full rudder authority where all earlier generation non-TVC airframe are stuck in their symmetry plan at high AoA. (most have also roll restriction – the Boîte à Meuh effect).
Nice one!
What is the most impressive to me is to see that this single 47 carries 30% of all US inventory 😉
It was the a test pilot. You know the kind of ones that fly the beast from… day one.
The Paris airshow F-35 sequence was ground breaking for all observer (to me the first one was the Dutch presentation to the public some times ago). It’s sad that Mr Eagle1 didn’t notice the obvious. It’s not like you can’t miss the point when you see some aerobatics never seen before :sleeping:
Well, if Turkey get out of NATO and keep leaning on Russia, there will be a queue among NATO to hand money to Greeks 😉
I do not quite understand why angling the nose with the velocity vector causes loss of energy if you are Russian but allows fast recovery if you are American, that must be definitely a blessing. Wings drag energy like crazy if you put them at angles with the air flow. They will stall about 15º unless slats and other devices are used, this is physics in the end. BTW, Flankers execute AoAs close to 150º (maybe more) in airshows, don’t know if those 35º you mention are recommendations to avoid bleeding energy or where do they come from.
It’s not about being Russian, French, Indian or from the US. Wings, you know the little things protubering from each side of your fuselage provide LIFT, the thing that overcome gravity. No wings (just like you have in a post-stall excursion), no LIFT… Hence power have to overcome that. And power doesn’t come from magic but from engines that barely can compensate the weight of your airframe (what is the max T/W ratio today 1.4?*).
As you see, it’s relatively simple. You don’t need to invoke the absurd to turn it into something catchy: it’s pure honest physics.
*see how many G you can pull in that postall without sinking?
The farce I mean is claiming equanimity when high AoA manoeuvres and general controllability of a plane are nothing but circus tricks if done by Russian planes but media and enthusiasts alike start jumping in joy when an US plane shows some signs of controllability just moderately close to what their rivals have been doing for years.
Most Russian “trrick”, the wonderful things Flankers and Su-57 we are use to see now are POST-STALL manoeuvre where, yeah, the loss of energy is high.
AoA even at the extreme angles displayed by the F-35 are within the flight domain of the aircraft where wings still provide lift and the nose is simply angled with its velocitu vector, allowing rapid recovery.
You will have a good idea of the difference watching one of the latest Hornet (F-18) airshow video by the Swiss (50 deg AoA excursion and immediate recovery).
The Flanker is said to be around 35 deg max AoA.
In the “square loop” that is part of the F-35 display, the aircraft reach extreme AoA without altering much of its velocity allowing rapid trajectory changes with minimal loss of E. A perf out of reach of more conventional design.
Rafale/F16/Typhoon may not reach those extreme AoA but on the other hand they will preserve their energy much better. It is much more a software limitation than a physical limitation.
Rafale and un-magic wedged Typhoon don’t reach even Eagle’s AoA value. Point Barre*.
*Period!
Nice podcast with the two F-35 demo pilots in Au. Not recommended for those that don’t like to hear about modern High Alpha :)²
https://aviationweek.com/defense/pod…-aerial-tricks
180 deg turn in 3 decond at 50deg AoA 9g(?)*
*notice that as it is not registered as an aero manoeuvre it can be displayed “right into the public face”
Army Secretary Defends Decision to Cut CH-47 Chinook Program
The U.S. Army‘s top officials on Tuesday had to defend the service’s decision to stop buying CH-47 Chinook helicopters to pay for futuristic aircraft and other modernization programs.
Last year, Army officials made a decision to find about $30 billion to help pay for the service’s modernization strategy over the next five years. The service did that by cutting or terminating 186 existing programs, Army Secretary Mark Esper told members of the House Appropriations Committee’s defense subcommittee as he described the proposed fiscal 2020 budget request.
Source:
Military.com
Long Live the King: With Problems Fixed, CH-53K Contract Expected in Weeks
The Marine Corps is just weeks away from awarding a contract for the first lot of CH-53K King Stallions,[…]
Sikorsky has 20 aircraft in production as of April 3 and has flown nearly 1,500 hours of its planned flight test regime. Deficiencies found during testing range from seat cushion design and handholds to engine gas reingestion, Rudder said. Test aircraft have flown faster than 170 kts, up to 18,000 feet and at greater than 60 degree bank, according to Sikorsky.“The vendor and the program office are going to fix these,” Rudder said. “And we’re going to hold them accountable to fix it.
Source:
Rotor & Wings.com
First up in the demonstration sequence, sorted alphabetically by companies, is a German-British Airbus team. […]
Swiss evaluators have the option of flying along in all two-seater aircraft variants, and one official could be seen in the back seat of a Eurofighter lifting off from Payerne on Thursday morning.Next up, at the end of April, Boeing will present its F-18 Super Hornet. That plane, along with the Eurofighter, is also still in the running for a German bid to replace its 80-some Tornado aircraft.
In mid-May, Dassault will demonstrate the twin-engine Rafale jet, for which the French government announced a multibillion-dollar upgrade program aimed at improving sensors and weapons earlier this year.
Then, following the F-35 trials, the Saab Gripen E is scheduled to complete the lineup of test flights in late June..[…]
The Lockheed jets will be from Hill Air Force Base, Utah, making stops on the U.S. East Coast and Ramstein Air Base, Germany, before arriving in Switzerland, the company said. The aircraft will be parked at Payerne during the duration of the tests for more than two weeks, up to June 17, a company spokesman told Defense News.
[Swiss]want enough capacity to have four planes in the air at any given time during crises.
I.T F.L.I.E.S! (yes, bold and LARGE with a lot of points…)
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The Roc took off at 06:58L and during the 2.5h flight achieved a maximum altitude of 17,000ft and a speed of 164kt (304km/h), says Stratolaunch. During the test flight the crew evaluated aircraft performance and handling qualities, before landing back at Mojave.
Tests included various flight control manoeuvres to calibrate speed and evaluate flight-control systems, including roll doublets, yawing manoeuvres, pushovers and pull-ups, and steady heading sideslips. The crew also flew simulated landing approach exercises at an altitude of 15,000ft.
Source:
FlightGlobal.com
I think everybody is leaning in that direction. The fact that no general grounding was issued being a strong indicator. Don’t forget that Japan seems to have been aware of some (at least in the earlier model) difficulties with their line. I take that from granted since Italy didn’t apparently face any similar concerns , while having produced both A and the more complex (?) B models.
So, it would seems logical IMOHO that only the Japanese fleet is grounded. But let’s wait and see.