Space News
space history and artifacts articles

space history discussion forums

worldwide astronaut appearances

selected space history documents

related space history websites

External Tank Cross Section

Mission: N/A (engineering sample)  
Comment: The loss of Columbia was caused by a piece of ET foam that impacted and resulted in a breach of the left wing

This surface cross section of the space shuttle's external tank reveals the half inch thick cork/epoxy layer covered with one to two inches of spray-on foam that prevents the super-cold cryogenic fuels inside the tank from forming ice on its outside. The polyisocyanurate foam also safes the tank's aluminum skin from aerodynamic heat and keeps its internal propellants at an acceptable temperature.

back to Artifacts

back to collectSPACE

© 1999-2014 All rights reserved.
Questions? E-mail