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24

It's even simpler than a German-American disagreement. It's use of ambiguous units. The term "specific X" means the amount of X you can get from a unit mass of something. For instance, in batteries, specific energy means the total amount of energy you can get from one unit mass of battery. As described in the Wikipedia article, *specific impulse" is the ...


30

They used an extremely large rail-based transporter/erector nicknamed the "grasshopper". Image source This image shows the N-1 in the process of rotation. Image source russianspaceweb says the hydraulic ram visible in this image "boasted a hydraulic cylinder one meter in caliber, which had a length of nine meters and would extend up to 16 meters". Two ...


26

The Orbiters changed over time so that, for example, Columbia when it was destroyed was quite a bit different from when it was delivered. When writing this up I've tried ignore the temporal differences and to list the major differences that had an effect on operations. All the Orbiters had different things failed in them at various times that were not ...


4

I think it's just barely possible that 1850s technology could achieve a crewed suborbital launch above the Kármán line, similar to the first crewed Mercury missions, but that anything beyond that would not be possible. Without modern rocket engines, the best propulsion option is a black powder rocket. This has a specific impulse of about 80 seconds (a ...


4

I found some right-facing contemporary shots of the two men (photo credits: NASA) and laid them beside the men in the ad. Top right picture is Cernan, bottom right picture is Young. My conclusion: nope.


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