AC 29-2B

7/30/97

GEOMETRIC CG 1/3 X WHERE X = AIRFOIL LENGTH (LESS BLADE ROOT & PLATFORM) FIGURE АPХ3-4 CG IS TAKEN TO LIE AT THE CENTERLINE OF THE 1/3 FRAGMENT

FRAGMENT VELOCITY TAKEN AT

GEOMETRIC CG

FRAGMENT MASS ASSUMED TO BE 1/3 OF THE AIRFOIL MASS Page A3- 13 BLADE FRAGMENT DEFINITION Appendix 3 AC 29-2B

Appendix 3

FRAGMENT

ROTATIONAL KE = ½1∞2

TRANSLATIONAL KE = ½ mv 100 TOTAL

KINETIC ENERGY (PERCENT) 60 120 180 240 300 360

ROTATIONAL TRANSLATIONAL

FRAGMENT SIZE C FIGURE APХ3-5. DISTRIBUTION OF TRANSLATIONAL AND ROTATIONAL

KINETIC ENERGY OF ROTOR-COMPONENT FRAGMENTS AS A FUNCTION

OF FRAGMENT SIZE Page A3-14

Appendix 3 CG of Fragment Becomes Center of Rotation of Fragment For Separation Distance Calculations:

1/3 Rotor with 1/3 Blade Height FIGURE APX3-6. CROSS SECTION THROUGH AIRCRAFT AT PLANE

OF ROTATION OF THE ENGINE DISK FRAGMENT Page A3- 15