clear_right, it will depend on the weight of the aircraft... at heavy weights you will probably stall before you lose control. The 400 also has 2 Eng INOP Minimum control speeds - which are obviously more limiting. At 300T or so, the aircraft is just flyable from Vr with 2 engines going (on one side)... You'd want to be tracking straight out over water though! The crosswind will also be an influence on controlability, as its not part of the certification e.g. a failure at V1 with max crosswind will probably result in a runway excursion.
Lancer