Airmed procedure C172:
1)check runway lenght availability!
2)centreline + directional control
3)flaps UP (or 10° for short field)
4)TO power set+ carb.heat cold
5)40kts callout (40Knots. Instruments green)
6)55kts. Rotate
7)60 kts Vx until 400ft. AGL
8)400ft.70kts.(Vy) Check flaps UP climb power SET.
9) After take off Checklist at 1000ft AGL.
Procedure P28R:
1) check runway lenght
2) centreline+ control
3) Flaps 10°
4) TO power set
5) 60mph. callout (60kts. Instruments green)
6)80mph Rotate, initial climb Vx 90mph
7) Positive climb callout (VSI+ Altimeter)
8) Gear Up (when NO runway available!!)(transition No lights)
9) 400ft AGL: Acceleration speed 100kts.
10) Flaps Retract (in stages)
11) throttle 25''
12)prop 2500rpm
13) After TO checklist at 1000ft AGL
as you can see, we do some things differently here, but we are convinced that it improves safety.
The Vx is done especially to get as high as possible within a certain distance, so we can RETURN at 400ft. or higher in case of problems...
Students get really drilled at this procedure, and it works in reality! (never return lower than 400ft on the C172, never below 600ft. on Piper!!!)