Wings made out of cardboard, parts attached with chicken wire – these are some of the features of the gimmicky ‘flying machines’ that took off from a 20-foot ramp and then plunge into the chilly waters of the Serpentine in Hyde Park, London, on Saturday. Red Bull’s “Flugtag 2008” is a competition in which home inventors “fly” their machines as far as they can off the starting ramp, while winning points for style, in an homage to the pioneers of aviation, the Daily Telegraph reported. But no matter how far they go, all will eventually meet a cold, watery end....