Title 14

PART 33 APPENDIX B


Appendix B to Part 33 - Certification Standard Atmospheric Concentrations of Rain and Hail

14:1.0.1.3.17.9.283.1.32 : Appendix B

Appendix B to Part 33 - Certification Standard Atmospheric Concentrations of Rain and Hail

Figure B1, Table B1, Table B2, Table B3, and Table B4 specify the atmospheric concentrations and size distributions of rain and hail for establishing certification, in accordance with the requirements of § 33.78(a)(2). In conducting tests, normally by spraying liquid water to simulate rain conditions and by delivering hail fabricated from ice to simulate hail conditions, the use of water droplets and hail having shapes, sizes and distributions of sizes other than those defined in this appendix B, or the use of a single size or shape for each water droplet or hail, can be accepted, provided that applicant shows that the substitution does not reduce the severity of the test.

Table B1 - Certification Standard Atmospheric Rain Concentrations

Altitude (feet) Rain water content (RWC)
(grams water/meter 3 air)
0 20.0
20,000 20.0
26,300 15.2
32,700 10.8
39,300 7.7
46,000 5.2