Bin Laden Raid May Have Exposed Stealth helicopter , page 4
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reply posted on 12-5-2011 @ 07:02 PM by drock905
reply to post by clay2 baraka



Talked to a blackhawk crew chief today. He sais he was 100 percent sure it wasn't a mechanical failure. That the pilot just crashed into the wall. He said it happens all the time especially when two are landing in close proximity in a combat zone due to the dust.

He guessed it was the 160th group? Which are the best pilots and are saying it was mechanical instead of pilot error to keep from "embarrassing " their record.



reply posted on 15-5-2011 @ 07:58 PM by Aloysius the Gaul
I got this throuygh professional/work sources today - apparently it is from AVwebFlash 12 May 11 - AvWeb being an aviaitn magazine that I don't usually have access to.


The (Stealth) Blackhawk Crash
The reason a stealthy version of the MH-60 Blackhawk crashed during the May 1 raid that killed Osama bin Laden includes the vortex ring state phenomenon, according to officials, but helicopter crashes in the Middle East are far from uncommon. Hot air close to the ground and the aircraft's proximity to the high walls of the compound could have caused that thin, hot air to be driven by propwash up the walls and then down through the rotor, causing the vortex ring state. With those conditions, the helicopter would have lost lift and settled with power, which is what officials say happened. The resulting hard landing immediately altered the original plan for SEALS to fast rope to the ground from a hovering aircraft. They fared better than they might have. In Iraq, only IED explosions and being shot by the enemy rank higher than U.S. helicopters for killing American soldiers, according to the Armed Forces Journal. And 80 percent of the helicopter accidents occur without the intervention of hostile forces. That said, the military helicopter crash rate is actually better than that of GA aircraft.


The non-hostile, non-combat accident rate for military helicopters currently stands near 2.1 per 100,000 hours while flying in some of the least hospitable conditions available to helicopters. Meanwhile, the accident rate for GA aircraft stands at 6.86 per 100,000 hours. The military helicopter pilots are most often brought down due to a combination of weather conditions and terrain. Night vision goggles have improved matters, but dust storms, brownouts caused by rotor wash, wire strikes and controlled flight into terrain are still problems the military and Congress hopes to better address. Proposed fixes include terrain avoidance avionics that would warn pilots of potential hazards. That specific technology would not have helped during the bin Laden raid, for which the mission profile put the aircraft in a hover at treetop level. Three-dimensional radar, also a proposed fix, penetrates brownouts and could have produced a synthetic image of the landing zone, but may not have saved the aircraft from vortex ring state.



reply posted on 16-5-2011 @ 07:59 AM by butcherguy
reply to post by Dalbeck

I guess that depends on how long it has been operational. If it is not that 'new' as far as the technology goes, they will probably release something more about it fairly soon. I would hope that the technology is not too new, as the use of it in a combat operation of this sort would have been too risky, IMO.

If the Chinese get their hands on it, via the Pakistanis, we will probably release something, but that will more than likely be disinfo to try to confuse the Chinese.


reply posted on 16-5-2011 @ 11:11 AM by XKrossX
reply to post by chopperswolf



Good info chopperswolf. Thanks for the blue edge rotors part particularly. I found this with your little tidbit.


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