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  #1  
Old 10-30-2008, 11:19 AM
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Default MUST watch - attach wings well!

http://www.chilloutzone.de/files/08102703.html
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Old 10-30-2008, 02:08 PM
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Default Re: MUST watch - attach wings well!

Well - it is good but many say it is a fake
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Old 10-30-2008, 02:53 PM
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Default Re: MUST watch - attach wings well!

As a pilot - I can assure you it is a fake...
BUT it is a great one... good shop job.
How do I know ....

1) Not that the plane spins to the left after the wing detaches...
Left wing on still... would be lifting with right wing detached (with forward velocity) the spin to counter would be a clear wing over to the right ... left wing lifting - right wing gone....

2) Note the knife edge light close to the round with little or no right rudder in. Should be significant right rudder input necessary in that configuration.

3) Lastly very, very short roll out (like 3 plane lengths)

BUT - Awesome shop job - just awesome..

Bowler
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Old 11-09-2008, 03:32 PM
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Default Re: MUST watch - attach wings well!

Wings don't just fall off.

Many aerobatic RC airplanes have sufficient excess thrust to hover and accelerate on the up line. They can do all of these things we saw in the video. Full size airplanes of this class can not hang all of their weight on the prop the way this one did. The closest they get is the "Harrier Pass" that Sean Tucker and a few others do;

The landing bounce sure looked like an RC landing. Any full sized airplane that bounced on like that would have severely bent gear legs, prop blades would have been bent or flying around, and the pilot would likely have had back injuries or worse;

The shortness of the landing roll looks to be way too short even for dropping it in out of a "Harrier Pass", but about right for an RC;

Wings on real airplanes are usually heavy enough that if you removed one wing, the bird would fall over onto the other wingtip, and this one did not;

Most aerobats like this have a one piece main wing spar and a one piece drag spar. Both run through the fuselage and are jointly designed to 20 g's. They are really beefy and each one bolts to the fuselage in one place per side just inside the fuselage skin. If it broke outboard of the bolted joints, something would be sticking out. If it broke inboard, both wings would have folded, pivoting about the connections. That lomcovak at the top of an upline would put on way less g than the pull up at the start of the sequence, so I doubt it broke up there. If you did succeed in breaking off a wing, it would not be a neat break. They tend to collapse and crush, and the wing folds upward or downward, and then finally tears up enough stuff to come free. This one did not appear to rip up the fuselage or leave any of broken bits attached to the bird. This looks like it was intended to come off;

When a wing spar does collapse and the wing tears away, it has to yank the aileron pushrod free someplace on that side, most likely damaging the entire roll control system, and its ability to be operated. It also has to break the other spar, rip out wiring and any fuel lines to the wing. The whole wing root area should be a mess of torn up hardware. This thing came off really clean...

I think that it was footage of an RC spliced with real airshow video, and some creative FX.

I have heard of successful results in a lost wing incident.

Quite a few years ago, a British aerobatic pilot had his main wing spar start to give up, with the spar collapsing and the wing trying to fold upwards. He responded by rolling inverted and then caught it there. That kept the upper cap in tension, but he was too low for parachute deployment, and the inverted fuel system was only good for 30 seconds or so. He could not climb to enough altitude for a safe jump, and he had to do something quickly. Not only that, who know how long the failing spar would hold... He flew the bird down close to the ground, did a "push and roll" at about 30 feet and plopped it on. Wrecked about everything in the bird, but he got to climb out.

The other one I know of is an Israel F15 pilot that had a mid-air during air combat training and lost most of a wing. A huge chunk of the F15's wing area is buried in the fuselage, wing roots, and engines, but he was minus the ailerons and flaps on that side. He had the benefit of a thrust to drag ratio that exceeded unity, and some oversized tail surfaces. He flew it in for a 180 knot touchdown, destroyed the tires, wheels, and brakes as well. He was also very motivated - if you ever eject from an Israeli military airplane, you are no longer an Israeli military pilot. They did have the benefit of altitude to try out his landing speed before going down low, and he did have the option of pulling the handles if it came down to it...

Billski
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  #5  
Old 11-09-2008, 08:45 PM
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Default Re: MUST watch - attach wings well!

Billiski -

A very complete analysis...

Great attention to detail....

You are an asset to this forum.....
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