Research Article
Performance and Vibration Analyses of Lift-Offset Helicopters
Table 2
Blade cross-sectional beam properties.
| Radial station | Bending stiffness [lb-ft2] | Torsion stiffness [lb-ft2] | Section mass [slug/ft] | Mass moment of inertia [slug-ft] | | | | | | |
| 0.0000 | 5972000 | 5972200 | 4784700 | 3.6178 | 0.0453 | 0.0920 | 5972000 | 5972200 | 4784700 | 3.6178 | 0.0453 | 0.0921 | 5972000 | 5972200 | 4784700 | 0.8205 | 0.0453 | 0.1150 | 4220000 | 4375000 | 4210000 | 0.6713 | 0.0453 | 0.1151 | 4220000 | 4375000 | 4210000 | 0.6713 | 0.0381 | 0.1390 | 3540000 | 3860000 | 3500000 | 0.6120 | 0.0381 | 0.1391 | 3540000 | 3860000 | 3500000 | 0.6120 | 0.0321 | 0.1620 | 2880000 | 3400000 | 2860000 | 0.5520 | 0.0321 | 0.1621 | 2880000 | 3400000 | 2860000 | 0.5520 | 0.0365 | 0.2300 | 1670000 | 2740000 | 1528000 | 0.4380 | 0.0350 | 0.3000 | 1080000 | 2230000 | 1040000 | 0.3432 | 0.0291 | 0.4000 | 680000 | 1770000 | 540000 | 0.2532 | 0.0202 | 0.5000 | 410000 | 1500000 | 260000 | 0.2016 | 0.0161 | 0.6000 | 240000 | 1250000 | 110000 | 0.1488 | 0.0117 | 0.7000 | 150000 | 980000 | 60000 | 0.1152 | 0.0096 | 0.7370 | 140000 | 880000 | 50000 | 0.1044 | 0.0090 | 0.7371 | 140000 | 880000 | 50000 | 0.1566 | 0.0090 | 0.8000 | 110000 | 730000 | 40000 | 0.1452 | 0.0077 | 0.9000 | 90000 | 500000 | 22000 | 0.1268 | 0.0055 | 0.9390 | 80000 | 460000 | 21000 | 0.1194 | 0.0047 | 0.9391 | 80000 | 460000 | 21000 | 0.3804 | 0.0047 | 0.9730 | 70000 | 420000 | 20900 | 0.3804 | 0.0042 | 0.9731 | 70000 | 420000 | 20900 | 0.4625 | 0.0042 | 1.0000 | 55600 | 388900 | 20800 | 0.4625 | 0.0042 |
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