@Jacques: don't know if there ever will be frictionless movement, maybe in another galaxy. Space elevators have some troubles with the cable between down here and up there... Has to be at least 36 000km long. Heard spider web has amazing properties.
Yes agree, up to now it was more a thing to show off, during cold war. 1st just to show the others "we are able to send a nuke everywhere around the globe". Than merely prestige, why do we have to send someone to the moon? Now enter China, we are the 3rd to enter space. Would have been cheaper to join forces.... Now that every space agency is short in funds. But well, its all about competition. So we invent the bicycle a million times, in case some ones is better.
But what shall we do on Mars or so, need to create an atmosphere 1st.
reg Fahrenheit 512: well, he was logic in his way, its based on alcohol, isn't it? 0 F it freezes, 100 F it boils (the alcohol). That happens when you use alcohol instead of mercury in a thermometer.
I constantly try to work out ounces by comparison on food packages, can't work it out. Inch used to be the thickness of the ruler's thumb, of course changed with every ruler. Luckily by now it is at least constant...
@Rod/Roger, been on an inspection, this guy plumbed in his water tank (good on him) using gaffer tape. Another favorite is liquid nails, but I had no choice.
Anyway I still have the sneaking suspicion that we can rather learn from these guys how to make lightweight multi use things than the other way around. NASA asks for 24.000 Euro per kg pay load...