| The powerful downstroke of the wing is powered by the large pectoralis muscles, which also attach to the sternal keel. |
| Each downstroke of the wing of birds produces a small upward acceleration of the body to support the weight of the body and overcome drag. |
| In putting, should you hit the ball on the upstroke, on the downstroke or at the bottom of the stroke? |
| Wingbeat frequency was determined by counting wingbeats from the mid point of the downstroke when the wingtip passed below the beak. |
| I'll always be a sucker for that two chord downstroke, no matter how many times it's revisited. |
| With each downstroke of his wings, he flipped his tail upwards, at about a 45 deg angle. |
