Look at this G550 (or maybe it's a G5 or G4) landing. Right at 00:30 you can see sharp and separate streaks of blowing condensation/air/moisture on the leading edge on both wings right after touchdown. What is that? Some kind of active blown leading edge lift destroyer or something? Never seen it before.

[youtube]http://youtu.be/4i1LvE1PleM[/youtube]

What it could maybe be is that due to the light, you see runway markers mirrored in the outboard portion of the flaps as the plane passes over them…..yes I would say , most definitely runway markings mirrored in the wings…

I would assume that the brightly polished leading edges together with the sun directly from the front and a "slow speed" of the film may exactly create such an optical illusion…I'd guess looking directly at it, not through video, one could not see it..

what is good to see on that video, I think it was a G-IV, and that is a pheomenon seen on a lot of aft mounted engines airplanes, is how strong the tail starts to shake when full reverse thrust is applied…pretty hefty structural loads on that tail...

I dont see anything. Nice group of aircraft.

I believe the other Beavers belong to John Nordstrom. Looks like Harrison and John went flying together .

Gerhard - you could be right, but it extends way past the polished leading edge. In fact, it covers the whole wing. Only thing I can think of is if the flaps are polished on their underside. Then you'd see a reflection of rwy markings. But flaps are normally not polished, they're painted white most times. It's a mystery.

Adam,

This is a GIV. The pilots probably had the wing anti ice on in cruise. Forgot to turn it off. With the engines spooling for reverse excess bleed air was shot out the exhaust valves located at the bottom and center section of leading edge. Air was probably humid which causes the vapor to appear when the hot bleed air was shot out.

Thanks Eric! Mystery solved, me thinks!

Or you can tell people this is how they spray the chemtrails

Adam & Eric…

while it has been some time for me to be uniquely familiar with G-IVs, that one may have been a G-450…

and wing-anti ice blow out was considered natural for me when Adam brought the subject up.

still not convinced..

reason:

it is nearly impossible for me to think that a crew with these weather conditions would land with the wing anti-ice on…just does not happen..

second. look very carefully, the touch down markers really come into play….it's a D-Day pattern that may very much reflect on the underside of the wings exactly as I mentioned in my post..

It is a GIV / not a 450. There are no holes in or behind the leading edge for wing anti-icing air to escape. It escapes into the wheel wells to keep moisture from freezing (except for early models where it escaped through vent panels located center-belly).
It's obvious to me that the streaks are reflections of runway markings. They start and stop very abruptly.

Although I don't fly a GIV, I do fly a 450 and 550 and agree with what Phil says. In the 450/550, the bleed air escapes through the wheel wells. The video (to me) is an obviously optical illusion.

Kevin

That's what it looks like to me.