5 votes

Apollo ALSEP RTG shorting switch to prevent overheat of the RTG?

I found some information: Short-circuiting of the RTG provides a cooling effect on the RTG' s thermal junction and slows the rise to full operational temperature. Figure 1 is a plot of no-load ...
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3 votes

Understanding the Viewgraph by Dr. John Houbolt and the probability of success calculation of a Lunar Landing

I found this section of a letter written by Dr. Houbolt to Dr. Seamans: Source on page 52. So the probability of success of the Saturn S-I with 8 engines is calculated as follows $ p = 0.96^8 = 0.72 $...
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2 votes

Were Hasselblad cameras used in space after the Apollo mission?

Yes, they were used on the space shuttle inside the cabin. So this iconic image of Bruce McCandless II was taken with a Hasselblad Camera from inside the cabin of the Orbiter. I could not find any ...
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