UA business class in the reconfigured wide-bodies aircraft advertise "lie flat" seat/beds, that recline to 180 degrees. Some other airlines have flat beds that recline to less than horizontal, for example LH at 170 degrees.

But, this is with respect to the floor and at cruise what angle is the floor at? Does a UA 747 criuse with the floor parallel to the gravational field, or is the nose tipped up a bit (as it seems). Does anyone know for sure? If the nose is, in fact, tipped up, then a 170 degree bed might in fact be "level".

Coments?