Search the archive:
YaBB - Yet another Bulletin Board
 
   
 
Pages: 1 2 
Send Topic Print
The Russians Are at it again (Read 1227 times)
Reply #15 - Aug 26th, 2011 at 8:24pm

OVERLORD_CHRIS   Offline
Colonel
No C-17B's, C-5M's for
Every One!
Chalreston SC

Gender: male
Posts: 1148
*****
 
hyperpep111 wrote on Aug 26th, 2011 at 10:05am:
Jake Bourdon wrote on Aug 26th, 2011 at 9:24am:
Well seeing that they announced the F-22 will be flying once again near the beginning of fall, I'm sure we'll learn more about her. As well as the F-35.

-Jake


They Haven't been flying? Shocked


Renč


Quote:
Pilots lose currency as F-22 grounding drags on


By Dave Majumdar - Staff writer
Posted : Thursday Aug 4, 2011 21:52:14 EDT

Air Force F-22 pilots are losing their training edge as the Raptor fleet enters its fourth month of a grounding.

The stealthy twin-engine air superiority fighters stood down May 3, after suspected problems with their oxygen systems. Air Force sources link the oxygen systems to a fatal crash last November.

Late last month, Air Force Vice Chief Gen. Philip Breedlove conceded that pilots, despite ongoing simulator training, can’t maintain their currency in the aircraft.
“Certainly, as we restart training we’ll have to regain those currencies just like in any other grounding of any other aircraft,” Breedlove said.

The shutdown has disrupted the various F-22 training pipelines, Air Combat Command (ACC) spokeswoman Capt. Jennifer Ferrau said in an email.

Pilots shifting to the Raptor have been told to return to their home stations until the jets are allowed to fly again. B-course students, the young pilots who are learning to fly the Raptor as their first fighter jet, have been limited to academics and simulator flights. Even the elite pilots at the U.S. Air Force Weapons School have been told to return to their home bases during the grounding.

“The [Weapons School] course in session at the time of the May 2011 standdown were able to complete the course,” Ferrau wrote. “The four students who started in the July class are returning to their home station and will be rescheduled after the standdown is lifted.”

In order to remain current in the F-22, a pilot must each month fly a certain number of sorties, as well as make landings, perform basic fighter maneuvers, practice air combat maneuvering and tactical intercepts, among a host of other skills, said one highly experienced former F-22 pilot.

If a pilot hasn’t flown at all in 210 days, he or she must go through the entire training course again, although a special requalification syllabus is being worked up to shorten the time involved.

Each of the F-22 wings are developing such requalification program, which will require approval by their parent major commands. For example, the 1st Fighter Wing at Langley Air Force Base (AFB), Va., falls under the auspices of ACC.

“The requalification program requires current ground and simulator training, an emergency procedures review, as well as a tailored requalification sortie syllabus,” Ferrau wrote.

That syllabus will mirror the process being used to stand up the F-35 initial training cadre at Eglin AFB, Fla.

“Once the standdown is lifted, instructor pilots will regain their flying currency first, then train/supervise/evaluate the rest of their unit through a directed requalification flight program,” Ferrau wrote. “Once the designated number of sorties have been flown to achieve requalification, all pilots must fly their regular number of monthly sorties and commanders will then declare when their unit is sufficiently trained and ready for various taskings.”

Currently, though the pilots are flying in the simulator, only the instrument approach currency can be maintained that way.

“Unlike [Federal Aviation Administration] Air Carrier operations where landing certification can be accomplished in simulators, only Instrument Approach currency can be maintained in the sim,” Ferrau wrote.

The instrument events that can be done in the simulator include general instrument flying, trail departures, instrument penetration and approaches, including single-engine approaches.

Simulators are useful for maintaining some of the pilots’ tactical skills because they make it easier to create and fly extremely demanding combat situations that can’t be replicated on a real-life range, the former pilot said.

The ACC spokeswoman agreed.

“While the simulator is great for tactical proficiency, instrument and emergency procedures, it can’t completely replace live flying,” Ferrau wrote. “For example, a pilot can make a high-speed, 9-G turn in the simulator and not feel the effects of G forces.”

Nor can a simulator’s visual system replicate the real world to a level that would be needed to completely maintain a pilot’s skills.

“Today’s simulator visuals are quite good, but nothing can truly replicate the physiological difficulties of long-range visual pick-up of tactical aircraft or ground targets in the ‘real’ world,” Ferrau said.

But perhaps the most important aspect is the feel of a real aircraft, the former Raptor pilot said.

Ferrau doesn’t disagree.

“The simulator is a controlled environment, while live fly includes the stress of heat, sweat, vibration, G force, blinding sun, motion of 3-dimensional flight, uncertainties while flying in a crowded airspace and maybe most important — mortality,” she said. “You can run out of fuel and put the sim on ‘freeze’ but you cannot stop live flight to avoid a dangerous situation. Live fly is inherently dangerous and heightens the pilot’s awareness to a degree above that in a sim.”

The problem of maintaining pilots’ skillS is exacerbated by the fact that the Air Force only has two F-22 simulator complexes, one at Langley AFB and another Tyndall AFB, Fla.

Joint Base Elmendorf-Richardson in Alaska should get its simulator in January. However, the Air Force has yet to decide where it will install two more simulators it has ordered, Ferrau said.

The former F-22 pilot said that although the operational Raptor squadrons will lose some of their readiness during the grounding, he is confident the units will remain effective. The stealthy, powerful Raptor is so grossly superior to any other combat aircraft that even inexperienced pilots who haven’t even finished training regularly defeat superior numbers of highly experienced aviators flying less capable jets, he said.

The pilot, who participated in the Raptor’s operational testing, said that “we could have been a bunch of buffoons, and the jet would have done well.” 
http://www.airforcetimes.com/news/2011/08/dn-pilots-losing-edge-as-f22-grounding...


What I think is funny, is I have current photos of the T-50 as my back ground at work, and the 2 older guys I work with in there 50's think: "It is a blatant copy of the F-14 and F-15 just like all the other Russian planes that copy ours! Look at the twin tail, they can't come up with their own design!"

I had to look at them like they were crazy, because out of the 8 older guys from late 40's to mid 50's, they are the only ones that don't think the T-50 is similar to the F-22 design because of the stealth. They see: twin engine far apart, twin tail, gear similar to the F-14, so they must have copied it. So I just gave up trying to explain it to them.

But on a side note, I still want to see if the T-50's omnidirectional thrust vectoring is stealth, like how the F-35's giant gaping exhaust is stealth like, do to the stuff around it deflecting the radar waves.
 

...
IP Logged
 
Reply #16 - Aug 27th, 2011 at 12:19am

Jayhawk Jake   Offline
Colonel
Wichita, KS

Gender: male
Posts: 483
*****
 
Xpand wrote on Aug 26th, 2011 at 7:22am:
Wow, I thought the curves just scattered the radar waves around like in normal planes. But the B-2 also has a flat bottom, which is very common in stealth fighters. That's probably because it reflects the radar waves away from the radar reciever since the radar waves' angle of reflection must be the same as the the angle of incidence, right?

What I don't understand is the purpose of the angles of the wings and tailplanes, for example in the F-22, having to be equal, leading edge to leading edge and trailing edge to trailing edge. And on the B-2 the jagging of the trailing edge also has parallel lines.


Symmetry is a good thing Wink  Makes it a lot easier to design and build (one set of tooling makes two wings)
 

...
AMD Athalon X6 1090T 3.2Ghz::EVGA nVidia GeForce GTX 560Ti 2GB GDDR5::8GB RAM
*The opinions expressed above are my own and are in no way representative of fact or opinion of any other person, corporation, or company.*
IP Logged
 
Reply #17 - Aug 27th, 2011 at 9:28am
NNNG   Ex Member

 
@ Xpand

"Planform alignment is also often used in stealth designs. Planform alignment involves using a small number of surface orientations in the shape of the structure. For example, on the F-22A Raptor, the leading edges of the wing and the tail surfaces are set at the same angle. Careful inspection shows that many small structures, such as the air intake bypass doors and the air refueling aperture, also use the same angles. The effect of planform alignment is to return a radar signal in a very specific direction away from the radar emitter rather than returning a diffuse signal detectable at many angles."

http://en.wikipedia.org/wiki/Stealth_technology

It can be noticed the most on the F-22 but also to a lesser extent on the F-35, B-2, and other stealth aircraft. The access panels and the skin of the aircraft are often jagged at the same angles as well. Apparently the T-50 at its current iteration does not have the latter two at this stage although it has some planform alignment.

http://i38.tinypic.com/169mdya.jpg

http://upload.wikimedia.org/wikipedia/commons/9/9e/F-22-non-planform.jpg

Pretty much all aircraft have curves, the only one that didn't was the F-117 but I think that's because computers were not powerful enough back then to compute curved surfaces that retained a low RCS.

What matters is the way the radar waves are reflected. Curved surfaces in stealth aircraft are OK as long as they are not likely to reflect radar back to the enemy radar. For example, you wouldn't want an aircraft shaped like a sphere... or a barrel... which is why no stealth aircraft have those shapes unlike non-stealth aircraft.
 
IP Logged
 
Reply #18 - Aug 27th, 2011 at 4:58pm

hyperpep111   Offline
Colonel
You'll Never See Me Coming.
93 million miles from sun

Gender: male
Posts: 1328
*****
 
My head is about to explode!!! Undecided


Renč
 

Most people think that flying a plane is dangerous, except pilots because they know how easy it is.
Arguing with a pilot is like wrestling with a pig in the mud, after a while you begin to think the pig likes it.
                                    
...
IP Logged
 
Reply #19 - Aug 28th, 2011 at 7:26am

Xpand   Offline
Colonel
Expert on flying bricks.
Portugal

Gender: male
Posts: 381
*****
 
Wow, thanks for the info!
 

Up is the way to go.
...
IP Logged
 
Pages: 1 2 
Send Topic Print