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#29
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On 25 Dec 2004 02:00:24 -0800, "Ramapriya" wrote:
Has anyone seen wheelbarrowing occur? Prima facie, it appears too I've seen it a couple of times, but porpoising is much more common. Wheelbarrowing is due to forcing the plane down when it's still going too fast to land. Porpoising OTOH is from not getting the nose up soon enough. The plane is rotating (nose coming up) when the nose wheel hits first, this leads to the nose rebounding up and the mains come down and rebound. You can get some pretty dramatic bounces this way. The best way to stop a porpoise is to just give it the power and go around. The typical porpoise ends up with the pilot behind the airplane (OK so it started that way), and each bounce gets bigger. They say three times and out. I saw two instances where this was true. On the third time they busted the nose gear right off on both planes. improbable (ludicrous almost) a thing to happen but even the FAA Airplane Flying Handbook copy that I have mentions it! Some well known planes are quite prone to porpoising if the pilot gets behind it. They are a bit heavy up front although the CG is fine. The problem comes in landing. That is why you see cautions about checking firewalls for wrinkles when purchasing a used plane. Also, while the ways of performing a flare is mentioned at many places, the reason for a flare is conspicuously absent everywhere. Just why is Actually it's not. *Almost* anything that flys flares on landing whether it has jet engines or feathers. a flare needed vis-a-vis a 3-point landing? After all, birds just come in and sit, without having to flare... Virtually all the birds I've seen flare and they are really good at it with many almost coming to a stop just before their feet touch down. As some one else mentioned, with your interest you should take up flying if you haven't already. Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com Ramapriya |
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