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In a higher wing loaded aircraft, lift is created at lower speeds by controlling the angle of attack on approach, as speed bleeds off, the nose will want to drop as the plane falls. Ever increasing amounts of up elevator must be applied to keep the angle of attack positive. On final, you will either run out of up elevator, or the aircraft will be on the ground. At this point, relaxing up elevator has about the same effect as adding down elevator (as you have seen). If you run out of up elevator before the aircraft is ready to land, you will be going faster than you want, the nose will drop, hit the runway, bounce up, giving it a high enough angle of attack to slightly fly again ( because you were still too fast), and the kangaroo hop begins. (my Aviator did not have enough up and no matter how I did it, it wanted to bounce, because just before I wanted it down, it had no more up to slow it down further, or keep the nose from falling and, bouncy bouncy) If you didn't have enough up elevator the first time, you won't have enough for the subsequent bounces either. Wham Wham Wham! The boomerang has a lower wing loading than most jets, and the effects of angle of attack are not as pronounced, it is more like a glider until it reaches a much lower speed and more angle of attack is needed. Thus its wing does not need to be swept back and delta shaped. It does have a tapered wing though to help out. The delta and sweeps will not tip stall, thus you can get that nose high on landing. Very suited for jets. Nose too high and the stall will only cause the nose to point to the ground. (this stalls is not a good thing either) They did not learn of the delta until after WWII. As we know, the warbirds of that era were not delta sweeps, and had a big tendency to snap if you got the nose too high and too slow.

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