• Hi Guest! Forum rules have been updated. All users please read here.

Question on satelite and spacecraft structure

amsci99

ACCESS: Secret
Joined
May 2, 2006
Messages
238
Reaction score
6
A dumb question but what are those silver and gold foil doing on satelite and spacecraft. I know that they are great at reflecting the heat but they look flimsy and expendable.
 

Michel Van

ACCESS: Top Secret
Senior Member
Joined
Aug 13, 2007
Messages
4,758
Reaction score
857
there is a good reason they on Spacecraft...

Heat !

let take a satellite in orbit the sun side of Satellite get over +100 °C
if get to hot, the electronic goes broken. fueltank rupture because fuel is vaporise to gas.

silver and gold foil reflect the most of sunlight to keep Satellite inside cool

those thermal blankets made today out cover betacloth covert with Teflon.
Beneath with layer out metalized Mylar and Kapon
(means its covert with Aluminium. look like silver but not so expensive like silver ;D )
in early day they used metalized Kevlar (with GOLD)
 

amsci99

ACCESS: Secret
Joined
May 2, 2006
Messages
238
Reaction score
6
Michel,

Thanks for the explaination but I still think that they look rather filmsy and was wondering how they were affixed to the superstructure of satelites or spacecraft. IIRC, they were on the Voyager and Mariner probes and wonder how they could stand up against micro meteorites or space dust?
 

Orionblamblam

ACCESS: Above Top Secret
Top Contributor
Senior Member
Joined
Apr 5, 2006
Messages
8,025
Reaction score
1,358
Website
www.aerospaceprojectsreview.com
amsci99 said:
Michel,

Thanks for the explaination but I still think that they look rather filmsy


They are.

[
how they could stand up against micro meteorites or space dust?

Next time you go to a gun range, make sure to pay special attention to the paper targets. Even though the paper targets are flimsy, when hit by a bullet generally the only thing that happens is that the bullet punches a hole in the paper. Nothing more. The damage does not extend much beyond the actual diameter of the bullet. Same thign with these foils... a tiny hole is punched by the impactor, and that's it.
 

Similar threads

Top