Flaps up? 737 and 767's. The flap handle will be in a T.O./ flap extension slot but you won't necessarily have any flaps extended. Leading edge devices? Yes. Flaps? No because Flaps 1 on some models is actually just leading edge slats with no flaps.
In the sim I've done no flap takeoffs in approx. 7 different airliners. Attempt rotation at normal Vr speeds with no flaps.
Speed, low angle of attack, and ground effect are your friend.
Try to 'make it' climb and you won't read the next day's headlines... which will be all about you.
