Maneuvering Loads and the V-n Diagram. The V-n, velocity-versus-load diagram, Figure 1, describes the relationship between an aircraftâs. speed, its longitudinal (pitch axis) maneuvering. capability, and its structural strength. The. positive-g, maximum lift line indicates how. aggressively, at any airspeed, we can apply aft.
Fairbanks, Alaska. During the early 19th century, some of the best scientific minds of the period believed that the aurora was caused by the reflection of sunlight from tiny ice crystals suspended high in the atmosphere.
Northern Lights: Light at the end of the tundra. The aurora borealis is a fickle phenomenon. A week can pass without a flicker...then bang! The Northern Lights come on like a celestial lava lamp. In the far north of Sweden, Nigel Tisdall is rewarded for his patience. 1  Happy camper: Watching the aurora south of Abisko, Sweden, claimed to be 'the best place in the world to see it' Photo: PETER ROSEN. 2  Snow mobile: A hut and sauna at the Abisko Ark Hotel, built on runners and towed out on to the ice Photo: PETER ROSEN.