On the 737-200, in some conditions, at near MTOW take-off speeds, Flaps 1 could exceed the brake energy limits (Vmbe). Flaps 2 take-off figures usually would accommodate the take-off. Faps 1 &(2) gave a better 2nd segment climb than F5/F15 on the -200. It is all revealed in the QRH Take-Off performance tables.