We’re rewarding the question askers & reputations are being recalculated! Read more.

New answers tagged

2

Here is what I have found: Apollo 4- Managed by the Smithsonian, is not on display there. May be on loan, can't figure out where. Apollo 17- On display at the Kansas Cosmosphere Apollo 15- Was recovered for sure, as y you mentioned. It seems like not as much effort was put forward to recovering these. Apollo 4 was probably recovered because it was the ...


1

Except for the Apollo 15 and 17 articles, it appears the Forward Heat Shields are resting at the bottom of the ocean. Somewhere. From Wikipedia: At 24,000 feet (7.3 km) the forward heat shield was jettisoned using four pressurized-gas compression springs. The drogue parachutes were then deployed, slowing the spacecraft to 125 miles per hour (201 ...


6

Apparently, black was chosen despite its thermal properties. This 2005 paper was written at the end of the assessment phase where technical feasibility of the mission has been demonstrated. It shows several options were studied, including a white shield. Materials with a/e (absorption/emission constant, ed.) close to 1 could also be used. Typically ...


3

In the most recent (as of Oct. 2019) SpaceX Starship media event, (SpaceX 29-sep-2019 YouTube video Starship Update) Elon Musk stated after about 21:05 that they were ditching the "transpirational cooling method" which was supposed to pump cryogenic fuel out of "pores" to form a cushion, often described as similar to the " "Leidenfrost effect" . Instead, ...


Top 50 recent answers are included