Leaderboard

'The wings need to be VERY carefully designed to prevent from the wings torque to destruction' This is a clue. It's not quite this simple but basicaly: Think of a normal swept back wing where the wingtips are behind the rotational center of the plane. If you use the control surfaces they push the wings slightly out of the line of flight of the aircraft & the wings change the direction of the plane, but because the wintips are trailing the center of forces for the plane they get pushed back into line once the control surfaces are released. Now imagine the wings are on the other way around - the tips are in front of the center of rotation of the plane. If the control surfaces deflect the wing the plane starts to change direction in the same way, but the forces acting on the wing are now pushing it away from the center not towards it & the deflection tends to get bigger unless you apply opposite forces with the control surfaces - the wing is inherently unstable & more twitchy - more manouverable, but needs a computer to keep it under control. It's as if the wingtips act like the tail on a weathervane. if the tail is downwind (tips behind) - it's stable, if it's upwind (tips in front), it wants to whip around the other way. You can keep a weathervane pointing the wrong way into a wind, but you've got to keep working at it. It's essentially why the tailplanes got moved from the front (Wright Bro's etc) to the back