https://safirsoft.com Study: Designing a 1960 Rome jet for interstellar travel—a major science fiction element—is impossible

"It's highly unlikely that even Kardashian Type II civilizations can make magnetic effects."

. . The ship's propulsion method was called the "Ram Jet Bosard," a real (albeit virtual) propulsion device proposed by physicist Robert W. Bossard a decade ago. Now, in a new article published in the journal Acta Astronautica, physicists are re-examining this unusual mechanism of interstellar travel and, unfortunately, they have found that Rome's plane is incapable. The authors conclude that it is possible from a purely physical point of view, but the related engineering challenges are not currently solvable.

A jet plane is essentially a jet engine that "breathes" air. The best counterpart to the basic mechanism is that it uses the engine's forward motion to compress incoming air without the need for a compressor, making Ramjet engines lighter and simpler than their turbocharged counterparts. The French inventor, René Lorraine, patented in 1913 the concept of the ramet (commonly known as the burner tube), although he was never able to make a prototype. Two years later, Albert Fono proposed a ROM jet propulsion unit to increase the range of projectiles, and in 1932 he was finally awarded a German patent.

A main ROM jet consisting of three components: an air intake, a combustion chamber. and nozzle. Hot exhaust from the combustion of fuel flows through the nozzle. The combustion pressure must be greater than the pressure at the outlet of the nozzle to maintain a constant flow, which the ram jet engine achieves by drawing outside air into the combustion chamber at the speed of each vehicle moving in it. engine. There is no need to carry oxygen on board. The downside is that the ram's jets can only produce thrust when the vehicle is actually moving, so it needs additional takeoff with the rocket. Thus, ROM jets are very useful as a means of acceleration, such as ROM jets or to increase the range of artillery shells. The simple ROM operation is denoted by Mach numbers. Zoom/Run Simple jet ROM, indicated by the Mach stream number. This concept can be modified as a means of interstellar payment. The basic premise of his 1960 paper was to collect interstellar protons (ionized hydrogen) using huge magnetic fields as a "band scoop". Protons are compressed until fusion produces nuclear heat, and magnetic fields transfer energy to the rocket's exhaust to produce thrust. The faster the ship moves, the more protons flow and the greater the thrust. That's why in a 1969 article, John F. Fishback suggested a possible functional magnetic field by considering factors such as radiation loss and the thermal distribution of the interstellar gas.

In particular, Fishback calculated that the speed would be cut off. The authors of this latest article explain: “The faster the ship, the more magnetic field lines focus on the fusion reactor. A stronger field causes higher mechanical stresses.” Comments show that the interstellar rematch plane can only continuously accelerate to a certain limit, At this point the throttle must be reversed so that the magnetic source does not reach the point of failure.

This is the Fishback solution that has been explored.This is a science fiction writer and physicist at the University of Technology Vienna (TU Wien) says Peter Schneider, a science fiction writer and physicist at the University of Technology Vienna (TU Wien). The idea is definitely worth exploring.” “Interstellar gas is very dilute, mostly hydrogen — about one atom per cubic centimeter. If you want to collect hydrogen in front of a spacecraft, like a magnetic funnel, with the help of huge magnetic fields, you can use it to launch the fusion reactor and speed up the spacecraft, electromagnetic fields relied on the electron microscope. Their calculations showed that Fishback's proposal for magnetic harvesting (or trapping) of Bussard's jets was physically feasible. The particles can actually be collected by a magnetic field and directed into the fusion reactor, achieving acceleration to relativistic velocities.

However, the authors also found that the funnel winding takes unreasonably long magnetic fields to do so. Achieved thrust of 10 million newtons (twice the thrust of the space shuttle). And the diameter of this funnel should be 4000 km. Thus, a visit to the center of the galaxy on a spacecraft equipped with a Bussard Ram jet is unreal for life. In fact, the authors concluded: "It is unlikely that even Kardashian type II civilizations would be able to build magnetic resistance using axial solenoid valves." (For reference, humans on Earth have not yet achieved a Type I civilization.)

DOI: Acta Astronautica, 2021. 10.1016/j.actaastro.2021.10.039 (about DOIs).

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