Federal Aviation Administration, DOT

Pt.33, App. D

NOTE: Source of data - Results of the Aerospace Industries
Association (AIA Propulsion Committee (PC) Study, Project
PC 338-1, June 1990.

Hail diameter (mm)

TABLE B3 - CERTIFICATION STANDARD ATMOSPHERIC RAIN DROPLET SIZE DISTRIBUTION
Rain droplet diameter (mm)

TABLE B4 - CERTIFICATION STANDARD
ATMOSPHERIC HAIL SIZE DISTRIBUTION

Contribution total RWC (%)

0-0.49 ........................................
0.50-0.99 ...................................
1.00-1.49 ...................................
1.50-1.99 ...................................
2.00-2.49 ...................................
2.50-2.99 ...................................
3.00-3.49 ...................................
3.50-3.99 ...................................
4.00-4.49 ...................................
4.50-4.99 ...................................
5.00-5.49 ...................................
5.50-5.99 ...................................
6.00-6.49 ...................................
6.50-7.00 ...................................

0
2.25
8.75
16.25
19.00
17.75
13.50
9.50
6.00
3.00
2.00
1.25
0.50
0.25

Total ............................

100.00

Median diameter of rain droplets in 2.66 mm
NOTE: Source of data - Results of the Aerospace Industries
Association (AIA Propulsion Committee (PC) Study, Project
PC 338-1, June 1990.

Contribution total HWC (%)

0-4.9 ..........................................
5.0-9.9 .......................................
10.0-14.9 ...................................
15.0-19.9 ...................................
20.0-24.9 ...................................
25.0-29.9 ...................................
30.0-34.9 ...................................
35.0-39.9 ...................................
40.0-44.9 ...................................
45.0-49.9 ...................................
50.0-55.0 ...................................

0
17.00
25.00
22.50
16.00
9.75
4.75
2.50
1.50
0.75
0.25

Total ............................

100.00

Median diameter of hail is 16 mm
NOTE: Source of data - Results of the Aerospace Industries
Association (AIA Propulsion Committee (PC) Study, Project
PC 338-1, June 1990.

[Doc. No. 28652, 63 FR 14799, Mar. 26, 1998]

APPENDIX C TO PART 33 [RESERVED]
APPENDIX D TO PART 33 - MIXED PHASE
AND ICE CRYSTAL ICING ENVELOPE
(DEEP CONVECTIVE CLOUDS)

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The ice crystal icing envelope is depicted
in Figure D1 of this Appendix.