Full Scale Crosswind Landings
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Full Scale Crosswind Landings
Don't know if anyone has posted this before. Cool video...
This is reportedly a video of Boeing testing the B777 and the B747SP doing landings in a severe cross wind.
The language is Portuguese because the testing is done at a Brazilian Air Force base famous for its severe cross winds. This is sure to send chills up your spine! Amazing to see exactly what those big birds can really endure...
ENJOY THE RIDE!
http://media.putfile.com/Pousos
This is reportedly a video of Boeing testing the B777 and the B747SP doing landings in a severe cross wind.
The language is Portuguese because the testing is done at a Brazilian Air Force base famous for its severe cross winds. This is sure to send chills up your spine! Amazing to see exactly what those big birds can really endure...
ENJOY THE RIDE!
http://media.putfile.com/Pousos
#3
RE: Full Scale Crosswind Landings
Also note that this approximates the easiest way to land an RC plane in a crosswind. Hold a crab angle till touch down then kick the nose around in line with the runway. Not a sideslip to be seen anywhere.
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RE: Full Scale Crosswind Landings
Those videos of the 777 are stress tests for the landing gear. I can assure you that no 777 pilot would land in a crab like that. The reason it yaws on touchdown is that planes with multiple tires on their mains will yaw very significantly in the direction of that gear if you land with that "truck" not perfectly aligned w/ the runway. The drag on the pavement of a gear truck w/ 6 tires that are not going straight down the runway will pull the nose straight every time. Not very graceful, but there is no way a plane will skid sideways down a dry runway. I have not landed a 777, but a 757 and 767 (both have multi wheel main gear too) will definately let you know that the gear is misaligned when you touchdown.
#6
RE: Full Scale Crosswind Landings
My old Cessna 140 had "crosswind gear" and you could land in 40 mph croswinds with little problem. I never really knew what the seller meant by crosswind gear until I HAD to land at a small airstrip in 40 to 45 mph winds coming almost directly across the runway. I ended up tracking straight down the runway but the nose of the airplane was pointing sideways. A strange sight indeed![8D]
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RE: Full Scale Crosswind Landings
From what I recall, every aircraft thas a maximum crosswind component. I once spent a very blustery afternoon sitting on the ground (literally... the airplane was still chained down) in Bermuda waiting for the wind to drop/change direction enough to let us take off. It was quite entertaining to sit there and watch all the inbound flights coming in almost sideways and descend to minimums before pulling the gear up and diverting to the mainland.
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RE: Full Scale Crosswind Landings
Hmm, wasn't aware that the Cessna 120/140 had a cross wind gear. I knew that Cessna 195 had them as I owned one for 10 years. But, it would never handle a cross wind of 40 knots or so. In that case I would head for another airport or land across the runway if wide enough or on the ramp. The gear only had about a 15 degree component but when combined with a proper slip landing it would work fine up to about 25 knots of direct cross wind. Norm
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RE: Full Scale Crosswind Landings
ORIGINAL: normgoyer
Hmm, wasn't aware that the Cessna 120/140 had a cross wind gear. I knew that Cessna 195 had them as I owned one for 10 years. But, it would never handle a cross wind of 40 knots or so. In that case I would head for another airport or land across the runway if wide enough or on the ramp. The gear only had about a 15 degree component but when combined with a proper slip landing it would work fine up to about 25 knots of direct cross wind. Norm
Hmm, wasn't aware that the Cessna 120/140 had a cross wind gear. I knew that Cessna 195 had them as I owned one for 10 years. But, it would never handle a cross wind of 40 knots or so. In that case I would head for another airport or land across the runway if wide enough or on the ramp. The gear only had about a 15 degree component but when combined with a proper slip landing it would work fine up to about 25 knots of direct cross wind. Norm
Airliners use the "kick out the crab" method to avoid dragging the wingtip/engine pylon on the ground or against obstacles as might be the case in a prolonged slipping approach... also is more comfortable for passengers than dropping a wing and cross controlling the rudder for the last half mile on final
Cheers!
Jim
#10
RE: Full Scale Crosswind Landings
Yeah, I was caught off guard by a strong south wind heading to Florida that got stronger than predicted. My ground speed was horrible and I needed fuel 20 minutes ago![X(] I didn't think I could make it to another airport so I did land on a diagonal across the runway giving me a little bit of a headwind. At the crab angle I was in my grounspeed felt like I was going about 20mph so I went for it. That's when I discovered the crosswind gear! Needless to say, I shouldn't have put myself in that position in the first place but I was young and not so smart. It was a lesson well learned. In the 5 years that I had the airplane, that was the only time the crosswind gear kicked in. I believe the crosswind gear was a special deluxe option on the Cessna 140B.