Boeing4ever From , joined Dec 1969, posts, RR: Reply 4, posted (8 years 10 months 2 weeks 6 days 15 hours ago) and read 2719 times:
AFAIK, Boeing has worked hard with the Marines to fix the computer software glitches that were causing the MV-22 accidents. And considering that it's been awhile since the last unit lost, it's rather hard to label it as a POS.
BlatantEcho From United States of America, joined Sep 2000, 1890 posts, RR: 1 Reply 6, posted (8 years 10 months 2 weeks 6 days 14 hours ago) and read 2669 times:
Ward Carroll, a spokesman for the V-22 program, last week said problems with prop-rotor gearboxes aboard the V-22 tilt-rotor aircraft, -- which takes off and lands like a helicopter but flies like an airplane -- could delay the start of operational tests due to begin in mid- to late-February.
Carroll said the problem had set off cockpit warning lights six times since April 2004, including three in the past month. Such a warning requires the pilot to land as soon as possible.
Boeing4ever From , joined Dec 1969, posts, RR: Reply 7, posted (8 years 10 months 2 weeks 6 days ago) and read 2590 times:
It's been grounded. Flew for a couple of months and then was grounded last Friday... AGAIN!
The F-22 recently had a grounding lifted after an accident. Does that qualify it as a POS? The fact that the warning lights are working properly to alert about the proprotor gearbox issues means that the aircraft's systems are doing their jobs. The gearboxes will be fixed, and the Osprey will fly again.
Every aircraft has teething problems, and I doubt you can find me one piece of military air equipment that would fit your definition of "quality".
Garnetpalmetto From United States of America, joined Oct 2003, 5313 posts, RR: 53 Reply 9, posted (8 years 10 months 2 weeks 6 days ago) and read 2574 times:
Is this the same Ward Carroll who is the author of "Punk's War?"
At any rate, Boeing4ever is right on - military hardware runs some pretty complex code, resulting in difficult teething times. Look at the AMRAAM - nowadays it has a reputation as the silver bullet of AAMs, while during its developmental phase, people were howling for it to be cancelled because it couldn't hit the broad side of a barn due to software problems.
South Carolina - too small to be its own country, too big to be a mental asylum.
Garnetpalmetto From United States of America, joined Oct 2003, 5313 posts, RR: 53 Reply 11, posted (8 years 10 months 2 weeks 5 days 23 hours ago) and read 2550 times:
I'm not saying that the Ospreys problems are software-related, I'm pointing out that a system that is a dog in developmental & trial phases can oftentimes come out performing as advertised. Inded, there have been very few systems that worked to expectations straight out of the box. The F/A-18, the Seawolf-class attack sub, the F-111, the F-14, are only a few examples of this.
South Carolina - too small to be its own country, too big to be a mental asylum.
Boeing4ever From , joined Dec 1969, posts, RR: Reply 12, posted (8 years 10 months 2 weeks 5 days 12 hours ago) and read 2500 times:
The V-22's problems are quite extensive and documented.
So were the F-14's...you're point?
What's even more important to realize is that the tiltrotor concept is pretty damn unconventional. The fact that V-22s have been operational already makes this an achievement. Of course there will be bugs to work out. But once again, show me one piece of military hardware that's worked perfectly right off the bat?
Iwok From Sweden, joined Jan 2005, 1106 posts, RR: 0 Reply 14, posted (8 years 10 months 2 weeks 5 days 10 hours ago) and read 2446 times:
I think the main issue with the V22 is its limited payload/range capabilities. In order to perform VTOL with 12 men on board, no weapons can be carried. Bad idea. Regarding civilian use, there is no benefit to the V22, since you can get cheaper helicopters with greater payload capacity.
I like the V22, but it has been in the works too long, is too risky and needs be dumped.
Grom365 From United States of America, joined Nov 2004, 27 posts, RR: 0 Reply 16, posted (8 years 10 months 2 weeks 5 days 4 hours ago) and read 2296 times:
The V-22 can carry the same troop load as the CH-46E, and it can carry that load at a higher altitude, at a greater speed, and for a greater distance. Since that's the platform the V-22 is supposed to replace, sounds like an upgrade in capability.
And a joint venture between Bell and Agusta is looking to develop this technology for the civilian market.
As for the last accident - which was 3-4 years ago - that was a result of pilot error and insufficient flight test. In other words, the pilot exceeded the then-certified flight envelope, and due to funding/schedule delays in the flight test program, did not have knowledge of suitable recovery techniques.
Rotor disk stall is a known phenomenon, and the flight envelope was restricted to avoid that possibility. Limit your max descent rate, you eliminate the possibility of generating a ring vortex. The pilot's descent rate in the exercise exceeded the allowable limits. His recovery techniques - namely, increase forward speed to escape his own vortex - would have worked had he been flying a helicopter. But he wasn't.
Now, in fairness to him, various funding cuts and subsequent restructuring of the flight test plan did not permit sufficient testing into this particular area of the flight envelope. [Stupid, when you consider this is the type of mission it will be executing.]
The test program that was undertaken following this accident determined (a) the no-kidding, absolute maximum descent rate; and (b) the recovery technique. Namely, tilt your nacelles forward 5-8 degrees to throw the vortex off your rotor. There was an article in Proceedings magazine a couple of months ago from the V-22 chief test pilot that explains this a little better than I can.
This accident is, to my knowledge, the only one whose cause can be directly - and solely - traced to aerodynamics. In the majority of the other incidents, poor manufacturing/quality control led to the failure of various mechanical components, leading directly to a crash. These have since been re-designed. Software was also a contributing factor in at least one incident.
DL021 From United States of America, joined May 2004, 11443 posts, RR: 78 Reply 17, posted (8 years 10 months 2 weeks 5 days 2 hours ago) and read 2248 times:
Boeing7E7.....Every program has gone through varying levels of difficulties. Everything from the CH-47 and the F-14 has had fatal accidents during testing and these are long serving aircraft that overcame their difficulties during the testing phase that was designed to find the bugs that were not apparent earlier.
That was the same situation for the helicopter when it came out, it was the same thing for the jet when it came out. The difference here is that we have the ability to electronically/digitally limit the flight envelope to avoid the dangerous maneuvers, while still maintaining the transformational capabilities of the aircraft. This thing is a turning point in combat transport, making ingress and egress faster and safer for the troops. Is it more risky than a helo? Without computers, hell yes. But you can't fly an F-16 without computers either, and its been up for 30 years now. They called the F-104 a flying coffin, and some pilots would not fly it.
The V-22 will fly, and it will meet expectations for safety and reliability. It'll take more work, but will be worth it.
Boeing4ever From , joined Dec 1969, posts, RR: Reply 19, posted (8 years 10 months 2 weeks 5 days ago) and read 2191 times:
Who said the 14 was any different?
Do you consider the F-14 a flying POS? It's been in reliable service for years and has had many teething problems of its own.
But I suppose only the Osprey can get the title "POS" since it's unconventional... Or is it that you're jealous that you couldn't come up with something as creative compared to the men with degrees in Aeronautical Engineering who developed it?
LMP737 From , joined Dec 1969, posts, RR: Reply 20, posted (8 years 10 months 2 weeks 4 days 18 hours ago) and read 2095 times:
I wonder what people were saying about helicopters when they made their first appearance. If I remember my history correctly the safety record of early helicopters was not all that good. Heck there's film of Igor Sikorsky himself crashing in one of his early models.
Sonic67 From United States of America, joined Jan 2005, 292 posts, RR: 0 Reply 22, posted (8 years 10 months 2 weeks 4 days 15 hours ago) and read 2053 times:
The V-22 is a great concept and is unbeatable when everything is going well but it has been hampered with hardware issues because of the complexity of the AC. Also Bell and B have not been able to solve the rotor wash problem but only minimize it with new engines nasals and flight procedures.