"There's the Red Rocket," said Henry, "just come in from New York." Looking at his watch. "Seven minutes behind time," he added, and shook his head. "These Atlantic services-they're really scandalously unpunctual." He took his foot off the accelerator. The humming of the screws overhead dropped an octave and a half, back through wasp and hornet to bumble bee, to cockchafer, to stag-beetle. The upward rush of the machine slackened off; a moment later they were hanging motionless in the air. Henry pushed at a lever; there was a click. Slowly at first, then faster and faster, till it was a circular mist before their eyes, the propeller in front of them began to revolve. The wind of a horizontal speed whistled ever more shrilly in the stays. Henry kept his eye on the revolution-counter; when the needle touched the twelve hundred mark, he threw the helicopter screws out of gear. The machine had enough forward momentum to be able to fly on its planes. Lenina looked down through the window in the floor between her feet. They were flying over the six kilometre zone of park-land that separated Central London from its first ring of satellite suburbs. The green was maggoty with fore-shortened life. Forests of Centrifugal Bumble-puppy towers gleamed between the trees. Near Shepherd's Bush two thousand Beta-Minus mixed doubles were playing Riemann-surface tennis. A double row of Escalator Fives Courts lined the main road from Notting Hill to Willesden. In the Ealing stadium a Delta gymnastic display and community sing was in progress.