<Li> An ablative heat shield consists of a layer of plastic resin , the outer surface of which is heated to a gas , which then carries the heat away by convection . Such shields were used on the Mercury , Gemini , and Apollo spacecraft . </Li>
<Li> An ablative heat shield consists of a layer of plastic resin , the outer surface of which is heated to a gas , which then carries the heat away by convection . Such shields were used on the Mercury , Gemini , and Apollo spacecraft . </Li>
what was the apollo heat shield made of
what was the apollo heat shield made of
plastic resin
plastic resin