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General Reentry Design Considerations
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absorb aerodynamic heating altitude Appendix VIII approximately beryllium body shape boiling Btu/ft2 Btu/lb CDAC constant convective heating coolant weight cooling system corresponds decreases dependent dimensionless drag brakes drag coefficient drag-weight parameter effects efficient factor flow ft/sec function given graphite heat absorption heat conduction heat input heat load heat transfer heat-flow rate heat-transfer coefficient heat-transfer rate heating during re-entry heating occurs increases initial re-entry velocity laminar and turbulent laminar boundary layer laminar flow large value long-range ballistic missile magnesium oxide material maximum deceleration maximum heating rate mean temperature nose apex outer surface path angle porous skin radiation cooling range rate during re-entry ratio re-entry heating Reynolds number shown in Fig sinh skin thickness specific heat spherical stagnation point steel skin strength retention surface temperature temperature rise thermal diffusivity total heating transient insulation turbulent boundary layer turbulent boundary-layer conditions unmelted portion value of CDAC)/(W vaporization velocity and path