These steel 18Lb heads are manuf for NASA w/ hollow cavity in the aft end w/ 2 perpendicular holes for a 5minute flare to be inserted for visible for an open sight operator to slave C Band & Telemetry antenna's prior to a NASA,NRL,CSA,ESA & several Univ around the World sounding rocket launches.
NASA/Bristol Aero Space Black Brant 12 configuration 4 stage sounding rocket w/ payload is 70+ feet in length.
950+ miles apogee
