| Miles per hr. | Ft. per sec. | Lb. per sq. ft. |
| 10 | 14·7 | 0·300 |
| 12 | 17·6 | 0·432 |
| 14 | 20·5 | 0·588 |
| 16 | 23·5 | 0·768 |
| Miles per hr. | Ft. per sec. | Lb. per sq. ft. |
| 18 | 26·4 | 0·972 |
| 20 | 29·35 | 1·200 |
| 25 | 36·7 | 1·875 |
| 30 | 43·9 | 2·700 |
| 35 | 51·3 | 3·675 |
§ 10. Representing normal pressure on a plane surface by 1; pressure on a rod (round section) is 0·6; on a symmetrical elliptic cross section (axes 2:1) is 0·2 (approx.). Similar shape, but axes 6:1, and edges sharpened (see ch. ii., § 5), is only 0·05, or 1/20, and for the body of minimum resistance (see ch. ii., § 4) about 1/24.
§ 11. Table III.—Lift and Drift.
On a well shaped aerocurve or correctly designed cambered surface. Aspect ratio 4·5.
| Inclination. | Ratio Lift to Drift. |
| 0° | 19:1 |
| 2·87° | 15:1 |
| 3·58° | 16:1 |
| 4·09° | 14:1 |
| 4·78° | 12:1 |
| 5·73° | 9·6:1 |
| 7·18° | 7·9:1 |
Wind velocity 40 miles per hour. (The above deduced from some experiments of Sir Hiram Maxim.)
At a velocity of 30 miles an hour a good aerocurve should lift 21 oz. to 24 oz. per sq. ft.
§ 12. Table IV.—Lift and Drift.