Relative Strengths.
For a given diameter the solid-wire stay possesses the greatest strength, the next best being the single-stranded cable, as the following comparison of stay strength, taken from the Report of the National Advisory Committee for Aeronautics, 1915, of America, will show:—
| Material. | Diameter. | Strength of material. | Strength of stay. |
| inch. | lbs. | lbs. | |
| Wire, solid | 3/16 | 5500 | 5100 |
| Strand, single | 3/16 | 4600 | 4100 |
| 7 × 19 multi-strand | 3/16 | 4200 | 3500 |