Jet Crash (1 Viewer)

CNN is playing this video of a crash in Canada...anyone have any info on it? The pilot looks lucky to have gotten out.

http://www.cnn.com/video/?/video/world/2010/07/23/vo.ca.jet.crash.globalnews&iref=NS1
He might have been. Certainly it depends on whether he as in stall, as it appears, and if so, how deeply. It also seems he may have had dual engine failure which would have caused his controls to fail as well. All the fighters ones have a certain rated performance based on their velocity. When I flew they had what they called a zero-zero ejection seat. This means they could survive a zero velocity, zero altitude ejection. However, in a stall, vertical velocity can be considerably negative so to survive, the vector produced by the seat's velocity and whatever forward velocity remains must exceed whatever negative velocity is occurring. Also here there was a rotation and the pilot ejected near 90 degrees so that offset much of the seats velocity. So bottom line, he probably was lucky. Amazing video as well.
 
He might have been. Certainly it depends on whether he as in stall, as it appears, and if so, how deeply. It also seems he may have had dual engine failure which would have caused his controls to fail as well. All the fighters ones have a certain rated performance based on their velocity. When I flew they had what they called a zero-zero ejection seat. This means they could survive a zero velocity, zero altitude ejection. However, in a stall, vertical velocity can be considerably negative so to survive, the vector produced by the seat's velocity and whatever forward velocity remains must exceed whatever negative velocity is occurring. Also here there was a rotation and the pilot ejected near 90 degrees so that offset much of the seats velocity. So bottom line, he probably was lucky. Amazing video as well.

According to last nights news the pilot was in stable condition. I haven't heard the root cause yet but with all these high alpha slow speed maneuvers the engines are critical. Perhaps the the right engine flamed out which might explain the yaw.
 
I'm not a plane man...so if someone could explain..


Where would the pilot have sustained the injuries? From my eye he didn't hit the ground all that hard, though ejecting as he did couldn't have been a picnic.
 
The new reports say that the pilot in a stable condition with minor injuries.

I am not an expert on aeronautical medicine, but I understand the main injuries are related to the very high G force the pilot is subjected to during ejection.

As a result of the high G force, the pilot suffers blunt trauma and the spine bears the brunt of this.

Compression fractures to the thoracic and lumbar spinal segments are the most common injuries due to the high G force.

Raymond.
 
The new reports say that the pilot in a stable condition with minor injuries.

I am not an expert on aeronautical medicine, but I understand the main injuries are related to the very high G force the pilot is subjected to during ejection.

As a result of the high G force, the pilot suffers blunt trauma and the spine bears the brunt of this.

Compression fractures to the thoracic and lumbar spinal segments are the most common injuries due to the high G force.

Raymond.
It is not the g force from the seat as much as it is the relative difference in G that was most likely the problem but the effect is the same. Also, it appears that the chute barely deployed and if he still had a downward vector from the stall that would be added to the force of impact with the ground. For example if a fully deployed chute would give him a descent rate of 100 fps and he started with a downward velocity of 500 fps, the resulting descent rate would be roughly 400 fps. Of course it could be much worse. I have seen pilots killed in ejections with fully deployed chutes because they didn't have enough altitude for the chute to overcome the negative vector from the condition they ejected from. Basically it is physics and vector analysis.
 
The crash was right after the pilot did a loop during practice. No cause has been given.

Terry

Here you go Chaps...

CF-18 Airshow Demo Aircraft Crashes

A Canadian Forces airshow demonstration pilot is in the hospital with undisclosed but non-life-threatening injuries after his CF-18 Hornet fighter crashed during preparation for an airshow in Alberta on Friday. Capt. Brian Bews, 36, ejected from the aircraft just before it dove into the ground at Lethbridge, Alberta. In advance of the weekend airshow, Bews was practicing a maneuver called the High Alpha Path when witnesses say they saw sparks coming from one of the engines and heard loud "popping noises." The High Alpha Path is a maximum angle of attack/minimum speed maneuver that relies on engine power to keep the aircraft stable. "I noticed it start to bank a little bit off to one side, which I kind of thought was unusual and I saw a couple of pops and all of a sudden this plane just banked and slowly dropped into the ground into this huge orange ball of fire," said Lethbridge Herald photographer Ian Martens, who took these jaw-dropping images.

Bews got out but at low altitude and an apparently oblique angle. "For a time there, it kind of looked like he was unconscious," Martin said. "The parachute was just pulling him off across the ground but he landed clear of the plane." A Canadian Forces spokeswoman appeared optimistic about his condition. "He is alive and we believe right now that his injuries are non-life-threatening," Canadian Forces Capt. Nicole Meszaros told CBC News.

UPDATE:
Captain Bews was treated for minor scrapes and has a sore back but was released from the hospital on Friday.

Tally Ho,
Beaufighter
 

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