(Ilushia @ Aug. 06 2006,23:51)
QUOTE
Also remember that the melee stat represents short range (Arms length, maybe a bit longer) fire-fighting and grenades and similar things. Sure you can fly 8 feet in the air, outside my arm's reach so I can't swing at you... But I can still throw grenades, shoot and similar things towards you. Skimmers are actually real flying machines, capable of pulling up and away from the ground, 20-30 feet up, like modern helicopters. Jet bikes are much lower to the ground, and as far as I know we never see them in the fluff or the history of 40K flying higher then about 8-10 feet off the ground. High enough to avoid terrain for the most part, but not so high as to avoid being able to be assaulted.
Jetbikes have the same tech as other skimmers (like the grav tanks) which can force FF by opening the range over there opponents. Why should a vyper or falcon which use exactly the same tech be able to do this, but not a jetbike - it makes no sense.
Fluff and even pictures, show them flying high in the air over skyscrapers so I don't think the 'altitude ceiling of 8-10 feet' is correct at all.