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If you could somehow use pure hydrogen gas. I have vaguely heard of the rarefaction wave gun the name is entertainingly close to the "Wave Motion guns" popular in Japanese animation , and will look it up. The only thing missing was that they need to put in that giant space bazooka on that space battleship Yamato: But the document I have been reading states that gun efficiency of a closed breech gun is around But I am sure if I am right about this You must factor in the mass of the propellant, which often is several times greater than the projectile.
But for a normal chemical propelled gun of And is it, because of this The gun, so far as I can tell from the documents I have read, eliminates much of the recoil using the Davis Gun principle of expelling mass in the opposite direction of the round in this case high speed gasses like most modern recoils rifles. Try looking at this document: I could see this mounted on vehicles for surface warfare, since self contained chemical energy rounds will be useful on any planet or asteroid against other ground targets, and the Marines will not be carrying separate power packs, generator sets, batteries and so on for electric weapons.
To make this conform to the topic, we are obviously speaking of the equipment pirates may use against a base, or the Marines use to clear a pirate nest An excellent discussion on the topic! I think though, that that would only work a few times before either port security was beefed up, or people simply stopped visiting that port. I think a generally much more likely way to involve piracy is to have smugglers. Even with the quality of sensing equipment we have so far and are likely to get going forward, the Oort cloud is going to be mostly unsupervised.
So that means there will be smugglers, and smugglers make a perfect target for pirates. Someone at some point is just going to take things by force and just like that - space pirates. The port sneaking tactic was simply to show that for every daring pirate attack in deep space, there is likely to be ten covert theft and sabotage operations done in the safety and chaos of a space station.
The Oort cloud idea with regards to detection is correct, but the problem is that How would they disguise their origin as being the depths of the Oort cloud?
Chemfuel does not provide adequate isp, metallic hydrogen and metastable helium are chimeric, and electric drives do not provide enough thrust. Nuclear thermal rockets - liquid core, water propellant - appear to be the "cheapest" rockets available. Ideas on how to reduce expense of nuclear rockets? Reusable missile bus Mass production Proton-beam pumped liquid core nuclear thermal rocket. A beam of protons is fired at the engine from the launching warship.
The protons strike the rocket engine, spalling neutrons as in a conventional energy multiplier. The neutrons drive the reactor to criticality, hopefully with liquid-core-NTR-like performance.
Salvoes would have to be small. Also, your missiles are only good as boosters. Any ideas on how this concept could be improved? Is there a better place for this discussion?
While a longtime Atomic Rockets follower, I am unfamiliar with the blogosphere. Welcome to the blog! The expense of nuclear rockets comes from the fuel itself especially when highly refined , and for the high temperature technology that can function despite the radioactivity and pressures in the core. I am doubtful that protons can cause neutron spallation.
You might be thinking of neutron multiplication, in which a neutron source radiated on a fissile material, causing the creation of even more neutrons.
If you instead just are going to push the core to criticality and turn the core liquid, I would simply use a larger quantity of poorly enriched fuel and neutron reflectors like in a normal reactor. This allows you to skip the gigawatt particle beam. If you want to improve the performance, you want higher temperatures. This is why research into nuclear rockets went straight from solid-core rockets to the very hot gaseous core rockets. If you want to discuss this further, I suggest either you keep commenting here, or come join us on the Discord: Interesting concept, but if you are radiating that much energy, then you may as well simply drive the rocket directly with the particle or laser beam.
A particle beam should work especially well if you use something like a magsail as the beam catcher. Or skip all the intermediate stuff and simply shoot the target with the beam directly I have tried this discord thing, but it opens onto a black screen with nothing else. I use a Macbook an Safari as the browser, could that be the issue? Well, the issue might come from the power density. Producing a gigawatt particle beam might force you to dedicate a huge mass to power generation, electrical equipment and lower temperature cooling.
Have you tried the second link? Thank you for your reply. But the technology to make the high performance reactor run without melting the engine even just once? Might well be the limiting factor on cost. I have a concept for a reusable M2P2 cargo tug.
M2P2 on the outbound leg, toss the cargo container on a free trajectory, and laser thermal to return the tug to base to load a fresh box. Unpowered Cargo containers and tugs hijackable. Goods too cheap to bother? Expensive stuff on faster ships? I was not aware of that technique. Thanks for linking it!
Upon reading it, I become skeptical again You could, for example, keep the neutron source behind a neutron absorbing window, and only open the window when you want to bombard your uranium with neutrons. Or, as I mentioned above, using the natural decay of the reactor fuel as its own neutron source, and a set of neutron reflectors to control whether the reactor goes critical or not.
It is the best option if you want lower mass. The cargo tug launching payloads into interplanetary trajectories and then returning for a quick turnaround is an idea that NASA has considered for its nuclear OTV orbital transfer vehicle studies, as it allows maximal use of the nuclear engines. An upside you have not thought of maybe is the fact that since the tug only travels a short distance before turning around and returning, it can accept particle beam accelerators instead of needing lasers, as particle beams are hard to keep focused over long distances.
So, M2P2 is the perfect propulsion technology for a tug used in this way! Thank you for the math. Good to know that a traditional reactor would be cheaper. Throwaway nuclear reactors, torch drives, etc still make me choke. I chose laser for the return flight because i assumed that the tug would have passed maximum particle beam range begore dropping cargo for maximum hyperbolic trajectory performance. Also, launch windows for a second "recovery" particle beam in a higher orbit HEO?
I may be dunning-krugered, and apologize for obvious idiocy. After dropping the cargo, the tug can be very light. It becomes economical to use a simple engine to cancel its outwards velocity and return it using a small amount of propellant. No obvious idiocy or dunning-kruger effect here, you are asking questions to learn. Hey Matter Beam, I have been always meaning to ask you this. One of the J-8s piloted by Lt. Wang Wei, made two close passes to the EP-3 before colliding with the spyplane on the third pass.
The 24 crew members 21 men and three women , that destroyed all or at least most of the sensitive items and data on board the aircraft, were detained by Chinese authorities until Apr.
A different scenario is then re-written for each edition. Although it has not been released yet, the outcome of the annual report on major weapons, by Michael Gilmore, chief of the Pentagon testing office, has already made the news. Flaws in the multi-million program actually, a 35 billion USD endeavour are almost everywhere: Navy has already deployed six P-8As out of 13 delivered so far to Japan to perform that mission.
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See all Used offers. There was a problem completing your request. The aircraft are augmented by an extensive suite of synthetic trainers, including Level D equivalent flight simulators and mock mission crew workstations. The introduction of the P-8A marks an important milestone for the USN, which has operated various versions of the legacy P-3 Orion turboprop patrol plane for over five decades.
The Poseidon is a derivative of the Boeing , incorporating a series fuselage mated to wings and featuring raked winglets to improve low-altitude fuel burn. The P-8A offers greatly improved communications and connectivity in comparison with the P-3C. Additionally, the open-architecture mission systems allow for simple and relatively inexpensive software upgrades to quickly introduce growth capabilities. Current budgets call the purchase of P-8 model aircraft.
Flight characteristic evaluation is being conducted by VX while operational weapons and test evaluations are being carried out by VX Michael Glynn for TheAviationist.