Heat Protecting Back Shell Tiles Installed on NASA’s Orion EFT-1 Spacecraft Set for Dec. 2014 Launch

universetoday.com ^ | August 30, 2014 | Ken Kremer on

[BenLurkin]

The cone-shaped back shell actually has a rather familiar look since its comprised of 970 black thermal protection tiles – the same tiles which protected the belly of the space shuttles during three decades and 135 missions of returning from space.

However, Orion’s back shell tiles will experience temperatures far in excess of those from the shuttle era. Whereas the space shuttles traveled at 17,000 miles per hour, Orion will hit the Earth’s atmosphere at some 20,000 miles per hour on this first flight test.

The faster a spacecraft travels through Earth’s atmosphere, the more heat it generates. So even though the hottest the space shuttle tiles got was about 2,300 degrees Fahrenheit, the Orion back shell could get up to 3,150 degrees, despite being in a cooler area of the vehicle.

Engineers have also rigged Orion to conduct a special in flight test to see just how vulnerable the vehicle is to the onslaught of micrometeoroid orbital debris.

Even tiny particles can cause immense and potentially fatal damage at high speed by punching a hole through the back shell tiles and possibly exposing the spacecrafts structure to temperatures high than normal.

“Below the tiles, the vehicle’s structure doesn’t often get hotter than about 300 degrees Fahrenheit, but if debris breeched the tile, the heat surrounding the vehicle during reentry could creep into the hole it created, possibly damaging the vehicle,” says NASA.

... Now it’s time for a real world test.

Therefore engineers have purposely drilled a pair of skinny 1 inch wide holes into two 1.47 inches thick tiles to mimic damage from a micrometeoroid hit. The holes are 1.4 inches and 1 inch deep and are located on the opposite side of the back shell from Orion’s windows and reaction control system jets, according to NASA.

[PIF]

“Therefore engineers have purposely drilled a pair of skinny 1 inch wide holes into two 1.47 inches thick tiles to mimic damage from a micrometeoroid hit. The holes are 1.4 inches and 1 inch deep and are located on the opposite side of the back shell from Orion’s windows and reaction control system jets, according to NASA.”

In other words, the vehicle is primed to fail on its first test, giving reason to cancel the entire program as a failure and waste of money which money could be better used for muslim outreach, or pushing man-made climate change.

[DManA]

Buzz Lightyear: "This isn't flying, this is falling with style!"

Orion will hit the Earth’s atmosphere at some 20,000 miles per hour