kerbiloid

Calling 911 from Innsmouth.

Counterban

Old Saruman

Lemmings The people who ask "Lemme in!", being not aware, what's in.

1. Orion receives just the part of total heat which is carried by the plasma jet. Most part of waste heat dissipates around the explosion point. 2. Orion works in pulse mode, unlike the continuous chemical or nuclear reaction engines, so it has ~0.5 s to emit some part of the absorbed heat. 3. Orion pusher plate is cooled by portions of coolant water, pumped through the plate internal structure/ 3b. The Orion coolant water doesn't need a close cycle, it turns into steam and gets vented out right in situ. Loss of water? No, a free attitude control, water-steam RCS, to hold the Orion on course during the engine work. 4. The Orion pusher plate is massive, unlike the nozzle lattice of permanukes and thin chalice of chemicals. It has great heat capcity, so the waste heat is distributed uniformly. 5. The pusher plate is prevented from the direct tungsten plasma hit by the soft plasma cloud of former oil, sprinkled on the plate between the explosions. 6. The Orion thrust is great, unlike the puny permanuke nudging. The interplanetary jump acceleration takes less than hour. So, the Orion doesn't need heavy rad protection from permanently working megareactor, the crew can sit in a small room, protected from rear end. Thus, it's more safe and efficient even from the radprotection and mass view. And this is a description of the coolant water and sprinkled oil. From the very beginning the Orion was to use several yield in flight, from sub-kiloton in upper air (and, I guess, in the Martian de-orbiting), to several kiloton in vacuum, exploded at different distances. By varying the yield and the frequency, it can vary its thrust. It can go down instead. The onboard reactor for the minimag Z-pincher can be using aneutronic B+H or N+H or C+H fusion, where the non-charged particles are generated at low rate, or even (B+H) be absent. Though, I believe that the mini-mag is a temporary-to-never intermediate design, and the two-staged fusion X-ray laser charges, compressed to fusion by similar Z-pinchers (i.e. returning to the original idea with intermediate inert discs) can bring the thrust to interstellar ark values.

/Oh, /you/ /see/ /age/. Spelling ban.

Ring Stack Hill

If compare the pusher plate and nukes total mass to the enormous kilometers-wide structures or negligible thrust of its alternatives, then Orion is super-efficient. It combines small size, low mass, and short burn time.

Causualties Casualties, caused by causality.

Banned to quit the thread and go to another one.

"Okay, so where is the respawn?"

Pancakes, fried on the oiled Hill.

Floor 4626: A Netfliex series Damsels and Dragons.

Calling 911 when you are amateur surgeon.

The people, who believe politicians, accuse the people who watch cartoons about superpowered catgirls in infantilism.

Yes, sir. Let the new life being on the Earth in that soup! Waiter! I can see the co-ffee, but where is the ffee itself?

When you use Google Earth to recall, what does your home look like from outside.

Sunflower oil.

On three.

Floor 4624: A secret room of the dungeon, with chains, attached to the walking skeleton.

"Finally, our poor airship balloon has landed on this hostile red planet."

Calling 911 when your are an ancient spirit, conjured by medium-school warlocks by the ritual from the teenager sitcom.

Yes.

Of course, sir, it's tested on the elk bow tie on the wallabove the bartender. You know, you are not the first here with such strange ideas. Waiter! I asked for Warhammer teaquila. It means a cup of tea with printed Imperial Aquila, to drink it with honor.

1. To cool it, you need a coolant fluid, pumped through pipes to the radiators. Liquid fluids vaporise at much lower temperatures than metals melt. They are out of scope. Gaseous fluids, like H or Xe, are limited with ionization temperature (just ~10 kK). But the pipes anyway limit this with 1.5 kK. So, no coolant can provide the chamber equilibrium temperature higher than several kK. 2. The radiators also limit the heat flow, as Luminosity ~ T4. Even if use droplet cooling with liquid radiator "panels" in electromagnetic field, the droplet temperature is anyway limited by the droplet metal boiling point, so still several kK. All of this means that the chamber structure can withstand only 1..2 kK equilibrium temperature, which makes the total power of the non-Orion engines pathetic, regardless of their efficacy percentage. The immaterial chamber of Orion isn't limited with any material properties at all. It can be kilometers in size, limited only by the plasma jet angle. Or almost unlimited if use two-stage charges, consisting of far part with an X-ray laser powered by a meganuke, detonated at hundreds kilometers behind, and passive close part, receiving the hit of the X-ray beam and forming the plasma jet out of its material and the beamed energy.