Stall Speeds

Stall speed rises with bank angle, and the published table shows exactly how much. The pattern is the same at every flap setting: nothing much happens up to 20° of bank, and then it runs away from you.

At a glance

• Conditions2300 lbs gross weight, power off, aft CG, speeds in MPH CAS
• Flaps up57 / 59 / 65 / 81 at 0 / 20 / 40 / 60° angle of bank
• Flaps 10°52 / 54 / 59 / 74 at 0 / 20 / 40 / 60° angle of bank
• Flaps 40°49 / 51 / 56 / 69 at 0 / 20 / 40 / 60° angle of bank

The three flap settings

All figures are at 2300 lbs gross weight, power off, aft CG, in MPH CAS:

• Flaps up: 57 at 0°, 59 at 20°, 65 at 40°, 81 at 60° angle of bank

• Flaps 10°: 52 at 0°, 54 at 20°, 59 at 40°, 74 at 60° angle of bank

• Flaps 40°: 49 at 0°, 51 at 20°, 56 at 40°, 69 at 60° angle of bank

Figure: Power-off stall speed against angle of bank, MPH CAS (redrawn).

The shape of the curve

Read across any row and the same story appears. From wings level to 20° of bank the stall speed rises by only two MPH; from 40° to 60° it rises by thirteen to sixteen. The last twenty degrees of bank cost you more than the first forty.

Check yourself

• Under what four conditions are these stall speeds published?

• What is the stall speed flaps up at 60° of bank, and flaps 40° at 60° of bank?

• How much does the stall speed rise between 0° and 20° of bank?

• Which flap setting gives the lowest stall speed at every bank angle?

Study aid — always fly your aircraft's current AFM/POH.