Enligt FAA FAA flygplan handbok finns det tre komponenter som gör en start:
Takeoff roll (ground roll) is the portion of the takeoff procedure during which the airplane is accelerated from a standstill to an airspeed that provides sufficient lift for it to become airborne.
Lift-off is when the wings are lifting the weight of the airplane off the surface. In most airplanes, this is the result of the pilot rotating the nose up to increase the angle of attack (AOA).
The initial climb begins when the airplane leaves the surface and a climb pitch attitude has been established. Normally, it is considered complete when the airplane has reached a safe maneuvering altitude or an en route climb has been established.
Så att ha en start måste du ha dessa tre komponenter. Det skulle innefatta en touch och ta lika mycket start från ett helt stopp.
När det gäller en officiell definition av landningar såg jag inte något officiellt i FAA-dokumentationen, men jag skulle säga att flygplanet rörande marken skulle räkna som en landning.