Research Article
Stability Analysis of a Helicopter with an External Slung Load System
Table 2
System poles for a fixed load (1000 lb) but with different slung lengths.
| | Helicopter | 10 ft | 15 ft | 20 ft |
| | −1.0919 | −1.0560 | −0.7848 | −0.8687 |
| | −6.3938 | −9.9252 | −9.2203 | −8.5565 |
| | −0.0032 | −0.0061 | −0.0034 | −0.0114 |
| | −0.0977 | −0.2012 | −0.0888 | −0.0953 |
| | −0.3045 | −0.2606 | −0.3394 | −0.3479 |
| | −0.3159 ± 0.4363 | −0.1809 ± 0.6219 | −0.2295 ± 0.5050 | −0.1636 ± 0.6092 |
| | −0.0489 ± 0.3898 | 0.0643 ± 0.4577 | 0.0074 ± 0.3445 | 0.0799 ± 0.4594 |
| | — | −0.1055 ± 1.9883 | −0.1020 ± 1.7380 | −0.1247 ± 1.4470 |
| | — | −0.8847 ± 1.2464 | −0.7662 ± 1.1680 | −0.6352 ± 1.0384 |
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