Approach speeds will vary depending on the conditions (i.e. wind direction/velocity. Confirm with your instructor the speed at which the approach should be flown if unsure. You can also determine landing speed by doing stalls and approach to stalls. Approach speed, Vref, is typically 1.3 times stall speed, and an approach speed can be determined by multiplying stall speed by 3, moving the decimal point to the left one place, and then adding that value plus any additional speed increases as required for winds to the stall speed (i.e. a 50 mph (80 km/h) stall speed would have a 65 mph (105 km/h) Vref). Ensure that the airplane is configured for landing while doing the approach to stall. This technique is especially useful for older aircraft that have been modified over the years (a 1973 Cessna 172 is probably not going to fly the same as it did when it left the factory 40 years ago), if you're flying a new type of aircraft that you're not familiar with, or if you have a malfunction that changes normal wing performance (stuck flaps, lost panels, or a bird strike that leaves a large dent in the wing).