Is that every airplane have its own take-off & landing speed?
Each TYPE of plane has its own takeoff and landing speeds. These speeds are usually constant in small planes, although if you dig into the performance charts in the airplane manuals, there are small variations to account for different weights. The takeoff speeds are generally between 50 and 80 knots for propeller-driven planes weighing less than 10,000 pounds. Landing speeds are generally between 60 and 90 knots. Large turboprops and jets are a different story. Since the weight varies so much more (depending on the type of plane, they can hold anywhere from approximately 2,000 pounds of fuel up to 400,000 pounds of fuel or more!), the takeoff and landing speeds change considerably (even in the same airplane) to take weight, air temperature, and airport elevation into account. In addition, there is a calculated “decision speed” called V1. This is the latest point a plane can safely abort a takeoff. This is a fairly complex topic beyond the scope of your question, so I won’t go into the
