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Old 09-18-2008 | 05:07 PM
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Rocketmagnet
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Default Zero speed landing possible ?

Hi all,

I would like to build my first RC airplane. However, I much prefer making things that are practically impossible, so, rather than getting a kit I would like to make up my own plane. To make this project as hard as possible, I would like the plane to have the following features:

1. Stereo gimballed cameras at the front, a bit like an owl's head, so I can fly it with a VR headset on. (not too hard)
2. The ability to make a zero speed landing. (hard)
3. Some feet and legs, so it can absorb the impact of the landing, or possibly land on a perch. (hardish)

It's number 2 that I would like some advice about. Does anyone have any experience making a plane which can do a very low speed or zero speed landing? Doing some research, I think the plane will need the following:
1. Wings which can reshape themselves considerably to be able to provide maximum lift at the low landing speed (slats and flaps)
2. Wing load, gyroscope, wind and ground speed, angle of attack and acceleration and ground distance sensors.
3. Computer control for the landing.

There are two ways I can imagine landing at zero speed. The way some birds do it is to fly below the landing point (a perch), then fly up towards it, reaching an almost zero speed apex just at the landing point, then grabbing it with their feet, and using them to come to a complete stop. This sounds physically possible, but requires some way to accurately sense the perch, which would need either an electronic perch, or a good realtime vision system onboard.
The other way is to land on the ground, but I can't imagine how it could be possible to come to a stop in the air, without needing to fly below the ground, and without flapping the wings.

I would prefer the land the second way. Can any aerodynamics experts suggest whether or not they think this is physically feasable? I am not interested to hear from people telling me that this will be a difficult/impossible project. I know, that's why I'm interested in it.

Many thanks in advance for any replies.

Hugo