turns listlengths 2 2 |
|---|
[
{
"speaker": "user",
"text": "What is the Tsiolkovsky rocket equation?"
},
{
"speaker": "omie",
"text": "It relates a rocket's change in velocity to its exhaust velocity and mass ratio: delta-v = Isp * g0 * ln(m0/mf), where m0 is the starting mass and mf is the mass after burning propellant. It'... |
[
{
"speaker": "user",
"text": "What is specific impulse?"
},
{
"speaker": "omie",
"text": "Specific impulse (Isp) measures how efficiently a rocket engine uses propellant. It's the thrust produced per unit weight-flow-rate of propellant, usually given in seconds. Higher Isp means more thrust for ... |
[
{
"speaker": "user",
"text": "What's the difference between specific impulse and thrust?"
},
{
"speaker": "omie",
"text": "Thrust is the raw force an engine produces, measured in newtons or pounds-force. Specific impulse is a measure of efficiency, not force -- a high-thrust engine can have low ... |
[
{
"speaker": "user",
"text": "What is delta-v?"
},
{
"speaker": "omie",
"text": "Delta-v is the total change in velocity a vehicle needs (or has the capability) to perform a maneuver, like reaching orbit or changing orbits. It's the standard currency for planning any space mission."
}
] |
[
{
"speaker": "user",
"text": "Why do rockets use multiple stages?"
},
{
"speaker": "omie",
"text": "Staging lets a rocket drop the dead weight of empty fuel tanks and engines once they're no longer needed, so the remaining stages don't have to keep accelerating that mass. It significantly improv... |
[
{
"speaker": "user",
"text": "What is the difference between a solid and liquid rocket engine?"
},
{
"speaker": "omie",
"text": "Solid engines have propellant premixed into a solid grain that burns once ignited and can't be throttled or shut off. Liquid engines store fuel and oxidizer separately... |
[
{
"speaker": "user",
"text": "What is a bipropellant rocket engine?"
},
{
"speaker": "omie",
"text": "A bipropellant engine uses two separate liquid components, a fuel and an oxidizer, that are mixed and combusted in the engine. Common pairs include RP-1/liquid oxygen and liquid hydrogen/liquid ... |
[
{
"speaker": "user",
"text": "What is the difference between a hypergolic and cryogenic propellant?"
},
{
"speaker": "omie",
"text": "Hypergolic propellants ignite spontaneously on contact, no ignition source needed, which makes them reliable for restarts (common in spacecraft thrusters). Cryoge... |
[
{
"speaker": "user",
"text": "What does Isp measure that thrust-to-weight ratio doesn't?"
},
{
"speaker": "omie",
"text": "Isp measures propellant efficiency -- how much delta-v you get per kilogram of propellant. Thrust-to-weight ratio measures how much acceleration an engine can provide relati... |
[
{
"speaker": "user",
"text": "What is a gimbaled engine?"
},
{
"speaker": "omie",
"text": "A gimbaled engine can pivot on its mount, letting the vehicle steer by redirecting thrust instead of using separate control surfaces or thrusters. Most modern liquid rocket engines are gimbaled for this re... |
[
{
"speaker": "user",
"text": "What is orbital velocity?"
},
{
"speaker": "omie",
"text": "Orbital velocity is the speed needed to maintain a stable orbit at a given altitude, where the object's forward motion balances gravity's pull. For low Earth orbit, that's roughly 7.8 km/s."
}
] |
[
{
"speaker": "user",
"text": "What is escape velocity?"
},
{
"speaker": "omie",
"text": "Escape velocity is the speed needed to break free of a body's gravity without further propulsion, ignoring atmospheric drag. For Earth, that's about 11.2 km/s from the surface."
}
] |
[
{
"speaker": "user",
"text": "What is a Hohmann transfer orbit?"
},
{
"speaker": "omie",
"text": "A Hohmann transfer is an efficient way to move between two circular orbits using two engine burns: one to enter an elliptical transfer orbit, and a second to circularize at the new altitude. It's fu... |
[
{
"speaker": "user",
"text": "What is the difference between apogee and perigee?"
},
{
"speaker": "omie",
"text": "Apogee is the highest point of an orbit around Earth (farthest from the planet), and perigee is the lowest point (closest). For orbits around other bodies the general terms are apoa... |
[
{
"speaker": "user",
"text": "What is orbital inclination?"
},
{
"speaker": "omie",
"text": "Inclination is the angle between an orbit's plane and a reference plane, usually the equator for Earth orbits. A 0 degree inclination orbit runs directly above the equator; a 90 degree inclination is a p... |
[
{
"speaker": "user",
"text": "What is geostationary orbit?"
},
{
"speaker": "omie",
"text": "Geostationary orbit is a circular orbit about 35,786 km above the equator where a satellite's orbital period matches Earth's rotation, so it appears to stay fixed over one point on the ground. It's widel... |
[
{
"speaker": "user",
"text": "What causes atmospheric drag on a spacecraft?"
},
{
"speaker": "omie",
"text": "Even at high altitude there are trace amounts of atmosphere, and a spacecraft moving through it collides with those molecules, losing kinetic energy over time. This slowly lowers the orb... |
[
{
"speaker": "user",
"text": "What is max-Q in a rocket launch?"
},
{
"speaker": "omie",
"text": "Max-Q is the point during ascent where the rocket experiences the greatest aerodynamic pressure, a combination of increasing speed and still-thick atmosphere. It's structurally the most stressful mo... |
[
{
"speaker": "user",
"text": "What is angle of attack?"
},
{
"speaker": "omie",
"text": "Angle of attack is the angle between an airfoil's chord line and the oncoming airflow. Increasing it generally increases lift, up to a point -- past the critical angle, the airflow separates and the wing sta... |
[
{
"speaker": "user",
"text": "What causes an aircraft wing to stall?"
},
{
"speaker": "omie",
"text": "A stall happens when the angle of attack exceeds a critical point and airflow separates from the top of the wing, causing a sudden loss of lift. It's about angle of attack, not airspeed directl... |
[
{
"speaker": "user",
"text": "What is the difference between lift and thrust?"
},
{
"speaker": "omie",
"text": "Lift is the force that opposes gravity and keeps an aircraft airborne, generated mainly by air moving over the wings. Thrust is the force that moves the aircraft forward, generated by ... |
[
{
"speaker": "user",
"text": "What is drag in aerodynamics?"
},
{
"speaker": "omie",
"text": "Drag is the resistive force acting opposite to an aircraft's motion through air, caused by factors like skin friction, pressure differences, and induced drag from generating lift. Reducing drag is a maj... |
[
{
"speaker": "user",
"text": "What is the difference between subsonic and supersonic flight?"
},
{
"speaker": "omie",
"text": "Subsonic flight is slower than the local speed of sound (below Mach 1), while supersonic flight exceeds it (above Mach 1). Crossing that boundary creates shockwaves and ... |
[
{
"speaker": "user",
"text": "What is a sonic boom?"
},
{
"speaker": "omie",
"text": "A sonic boom is the sound created by shockwaves when an object travels faster than the speed of sound. The shockwaves merge into a cone-shaped pressure wave that produces a loud boom when it reaches an observer... |
[
{
"speaker": "user",
"text": "What is the Mach number?"
},
{
"speaker": "omie",
"text": "Mach number is the ratio of an object's speed to the local speed of sound. Mach 1 means traveling exactly at the speed of sound, Mach 2 is twice that speed, and so on."
}
] |
[
{
"speaker": "user",
"text": "What materials are commonly used in rocket engine construction?"
},
{
"speaker": "omie",
"text": "Common choices include stainless steels like 316L, nickel-based superalloys like Inconel 625, copper alloys for regeneratively-cooled combustion chambers, and increasin... |
[
{
"speaker": "user",
"text": "Why is Inconel used in rocket engines?"
},
{
"speaker": "omie",
"text": "Inconel is a nickel-chromium superalloy that holds its strength at very high temperatures and resists oxidation and corrosion, which makes it well-suited for combustion chambers, nozzles, and o... |
[
{
"speaker": "user",
"text": "What is regenerative cooling in a rocket engine?"
},
{
"speaker": "omie",
"text": "Regenerative cooling routes some of the propellant, usually fuel, through channels in the engine's walls before it's burned. This absorbs heat from the combustion chamber and nozzle, ... |
[
{
"speaker": "user",
"text": "What is a de Laval nozzle?"
},
{
"speaker": "omie",
"text": "A de Laval nozzle is the converging-diverging shape used on most rocket engines. The converging section accelerates gas to the speed of sound at the throat, and the diverging section further accelerates it... |
[
{
"speaker": "user",
"text": "Why does a rocket nozzle have a specific expansion ratio?"
},
{
"speaker": "omie",
"text": "The expansion ratio, the area of the nozzle exit divided by the area of the throat, determines how much the exhaust gas expands and accelerates. It's tuned for the expected a... |
[
{
"speaker": "user",
"text": "What is thrust vectoring?"
},
{
"speaker": "omie",
"text": "Thrust vectoring is steering a vehicle by changing the direction of engine thrust rather than using external control surfaces. It can be done by gimbaling the whole engine, using vanes in the exhaust, or in... |
[
{
"speaker": "user",
"text": "What is the difference between a turbojet and a turbofan engine?"
},
{
"speaker": "omie",
"text": "A turbojet pushes all its intake air through the core to be compressed, burned, and expelled. A turbofan adds a large fan in front that bypasses most of the air around... |
[
{
"speaker": "user",
"text": "What is a ramjet?"
},
{
"speaker": "omie",
"text": "A ramjet is a jet engine with no moving compressor parts -- it relies entirely on the vehicle's forward speed to ram air into the engine and compress it before combustion. It only works efficiently at high speeds, ... |
[
{
"speaker": "user",
"text": "What is a scramjet?"
},
{
"speaker": "omie",
"text": "A scramjet (supersonic combustion ramjet) is like a ramjet but combustion happens while the airflow through the engine stays supersonic, rather than being slowed to subsonic speeds first. This lets it operate eff... |
[
{
"speaker": "user",
"text": "What is the payload fraction of a rocket?"
},
{
"speaker": "omie",
"text": "Payload fraction is the ratio of a rocket's payload mass to its total liftoff mass. It's usually a small percentage, since most of a rocket's mass at launch is propellant and structure, not ... |
[
{
"speaker": "user",
"text": "What is the mass ratio of a rocket?"
},
{
"speaker": "omie",
"text": "Mass ratio is the rocket's total mass at liftoff divided by its mass after all propellant is burned. It directly determines how much delta-v the rocket equation says it can achieve for a given exh... |
[
{
"speaker": "user",
"text": "Why is reaching orbit harder than just going high enough?"
},
{
"speaker": "omie",
"text": "Orbit isn't about altitude, it's about speed. A rocket has to accelerate sideways to roughly 7.8 km/s so that as it falls back toward Earth, the curve of its fall matches the... |
[
{
"speaker": "user",
"text": "What is aerodynamic heating during reentry?"
},
{
"speaker": "omie",
"text": "As a spacecraft reenters the atmosphere at high speed, it compresses the air in front of it, which generates intense heat, not primarily from friction but from that compression. Heat shiel... |
[
{
"speaker": "user",
"text": "What is an ablative heat shield?"
},
{
"speaker": "omie",
"text": "An ablative heat shield is designed to burn away and erode in a controlled manner during reentry, carrying heat away with the material it sheds. It's a proven, simple approach used on many crewed cap... |
[
{
"speaker": "user",
"text": "What is a flight computer used for on a rocket?"
},
{
"speaker": "omie",
"text": "A flight computer handles guidance, navigation, and control -- tracking the vehicle's position and orientation, running control algorithms, and commanding actuators like engine gimbals... |
[
{
"speaker": "user",
"text": "What sensors does a rocket flight computer typically use?"
},
{
"speaker": "omie",
"text": "Common sensors include an IMU (accelerometer and gyroscope) for tracking motion and orientation, a barometer for altitude, and sometimes GPS for position. Together they let t... |
[
{
"speaker": "user",
"text": "What is apogee detection used for in model rocketry?"
},
{
"speaker": "omie",
"text": "Apogee detection identifies the highest point of a rocket's flight, typically by watching for the moment vertical velocity or altitude readings start decreasing. It's the usual tr... |
[
{
"speaker": "user",
"text": "What is the difference between a PCB flight computer and an off-the-shelf one?"
},
{
"speaker": "omie",
"text": "A custom PCB flight computer is designed and built for a specific rocket's needs, letting you choose exactly which sensors, processing power, and feature... |
[
{
"speaker": "user",
"text": "What are active flight controls on a rocket?"
},
{
"speaker": "omie",
"text": "Active flight controls actively adjust the rocket's trajectory during flight, using things like movable fins, gimbaled engines, or reaction control thrusters, guided by the flight compute... |
[
{
"speaker": "user",
"text": "What is static margin in rocketry?"
},
{
"speaker": "omie",
"text": "Static margin measures how stable a rocket is by comparing the position of its center of pressure to its center of gravity, usually expressed in calibers (body diameters). A positive static margin ... |
[
{
"speaker": "user",
"text": "What is the center of pressure on a rocket?"
},
{
"speaker": "omie",
"text": "The center of pressure is the point where the net aerodynamic force on the rocket effectively acts. For a stable rocket, this needs to sit behind the center of gravity so aerodynamic force... |
[
{
"speaker": "user",
"text": "What is N2O/ethanol used for in rocket engines?"
},
{
"speaker": "omie",
"text": "Nitrous oxide and ethanol form a bipropellant combination popular in amateur and small commercial rocketry. N2O is self-pressurizing and easier to handle than cryogenics, and paired wi... |
[
{
"speaker": "user",
"text": "What is a hybrid rocket engine?"
},
{
"speaker": "omie",
"text": "A hybrid engine combines a solid fuel grain with a liquid or gaseous oxidizer, unlike a pure solid (both premixed and solid) or pure liquid (both liquid) engine. It gets some of the throttle/shutdown ... |
[
{
"speaker": "user",
"text": "What is a monopropellant rocket engine?"
},
{
"speaker": "omie",
"text": "A monopropellant engine uses a single chemical that decomposes or reacts to produce thrust, often with a catalyst. Common examples include hydrazine or hydrogen peroxide engines, which are sim... |
[
{
"speaker": "user",
"text": "What is a pressure-fed rocket engine?"
},
{
"speaker": "omie",
"text": "A pressure-fed engine uses pressurized gas to push propellants into the combustion chamber, rather than using pumps. This simplifies the design and reduces moving parts, but limits the achievabl... |
[
{
"speaker": "user",
"text": "Why can't we leave the solar system?"
},
{
"speaker": "omie",
"text": "Leaving the solar system requires achieving escape velocity, which is much higher than the speeds needed for low Earth orbit. This demands a tremendous amount of energy and propellant, making it ... |
[
{
"speaker": "user",
"text": "What is the difference between a launch vehicle and a spacecraft?"
},
{
"speaker": "omie",
"text": "A launch vehicle is the rocket that gets a payload into space, while a spacecraft is the vehicle that operates in space itself. The launch vehicle is usually expendab... |
[
{
"speaker": "user",
"text": "Is space ACTUALLY empty"
},
{
"speaker": "omie",
"text": "Space is mostly a vacuum, but it's not completely empty. It contains a small amount of matter, including photons, neutrinos, and some gas molecules. The density of this matter is extremely low, but it's not z... |
[
{
"speaker": "user",
"text": "What is the difference between a satellite and a probe?"
},
{
"speaker": "omie",
"text": "A satellite is an object that orbits a planet or other body, often for communication, observation, or navigation. A probe is a spacecraft sent to explore space or another celes... |
[
{
"speaker": "user",
"text": "What is the difference between a geosynchronous and a geostationary orbit?"
},
{
"speaker": "omie",
"text": "A geosynchronous orbit has a period that matches Earth's rotation, but it can be inclined or elliptical, so the satellite may appear to move in the sky. A ge... |
[
{
"speaker": "user",
"text": "How can we faster than light"
},
{
"speaker": "omie",
"text": "To go faster than light, we would need to break the laws of physics as we currently understand them. According to Einstein's theory of relativity, nothing with mass can reach or exceed the speed of light... |
[
{
"speaker": "user",
"text": "Is there any way we can go near the speed of light"
},
{
"speaker": "omie",
"text": "Yes, but it requires enormous amounts of energy. As an object approaches the speed of light, its relativistic mass increases, requiring more and more energy to continue accelerating... |
[
{
"speaker": "user",
"text": "What is an ion thruster?"
},
{
"speaker": "omie",
"text": "An ion thruster is a form of electric propulsion that ionizes a propellant, usually xenon, and accelerates the ions with an electric field to produce thrust. Thrust is tiny compared to chemical engines, but ... |
[
{
"speaker": "user",
"text": "What is electric propulsion?"
},
{
"speaker": "omie",
"text": "Electric propulsion covers thrusters that use electrical energy, rather than chemical combustion, to accelerate propellant. It includes ion thrusters and Hall-effect thrusters, and it trades low thrust f... |
[
{
"speaker": "user",
"text": "What is a reaction control system?"
},
{
"speaker": "omie",
"text": "A reaction control system (RCS) is a set of small thrusters used for fine attitude control and minor translation maneuvers, rather than main propulsion. Spacecraft use them to rotate, dock, or make... |
[
{
"speaker": "user",
"text": "What is a launch abort system?"
},
{
"speaker": "omie",
"text": "A launch abort system is a set of rockets or mechanisms that can pull a crew capsule away from a failing launch vehicle in an emergency. It's a key safety feature on crewed rockets, designed to activat... |
[
{
"speaker": "user",
"text": "What is dynamic pressure in aerospace, often called Q?"
},
{
"speaker": "omie",
"text": "Dynamic pressure (Q) is the pressure generated by a vehicle's motion through air, proportional to air density and the square of velocity. It's a key structural design driver, si... |
[
{
"speaker": "user",
"text": "What is a monocoque structure?"
},
{
"speaker": "omie",
"text": "A monocoque structure uses the outer skin itself to bear structural loads, rather than relying on an internal frame. It saves weight but requires the skin to be strong enough on its own, which is why i... |
[
{
"speaker": "user",
"text": "What is a semi-monocoque structure?"
},
{
"speaker": "omie",
"text": "A semi-monocoque structure combines a load-bearing skin with internal reinforcements like stringers and frames or ribs. Most modern aircraft fuselages use this approach, it's a middle ground betwe... |
[
{
"speaker": "user",
"text": "What are ailerons used for?"
},
{
"speaker": "omie",
"text": "Ailerons are control surfaces on the trailing edge of an aircraft's wings that move in opposite directions to roll the aircraft. Moving the control stick left drops the right aileron and raises the left, ... |
[
{
"speaker": "user",
"text": "What does the rudder do on an aircraft?"
},
{
"speaker": "omie",
"text": "The rudder is a control surface on the vertical stabilizer that controls yaw, rotation around the vertical axis. It's mainly used to counteract adverse yaw and to control the aircraft's nose d... |
[
{
"speaker": "user",
"text": "What does the elevator do on an aircraft?"
},
{
"speaker": "omie",
"text": "The elevator is a control surface on the horizontal stabilizer that controls pitch, rotation around the lateral axis. Pulling back raises the nose, pushing forward lowers it, by changing the... |
[
{
"speaker": "user",
"text": "What is roll, pitch, and yaw?"
},
{
"speaker": "omie",
"text": "These are the three rotational axes of a vehicle: roll is rotation around the front-to-back axis, pitch is rotation around the side-to-side axis (nose up or down), and yaw is rotation around the vertica... |
[
{
"speaker": "user",
"text": "What is an inertial measurement unit?"
},
{
"speaker": "omie",
"text": "An inertial measurement unit (IMU) combines accelerometers and gyroscopes to measure a vehicle's linear acceleration and rotational rate. It's a core sensor for flight computers, letting them tr... |
[
{
"speaker": "user",
"text": "What is GNC in aerospace?"
},
{
"speaker": "omie",
"text": "GNC stands for guidance, navigation, and control. Guidance determines the desired path, navigation figures out where the vehicle actually is, and control drives the actuators to follow the guided path -- to... |
[
{
"speaker": "user",
"text": "What is a gravity assist maneuver?"
},
{
"speaker": "omie",
"text": "A gravity assist uses a planet's gravity and orbital motion to change a spacecraft's speed and trajectory without burning propellant. It's how many deep-space missions reach distant targets that wo... |
[
{
"speaker": "user",
"text": "What is aerobraking?"
},
{
"speaker": "omie",
"text": "Aerobraking uses controlled passes through a planet's upper atmosphere to slow a spacecraft down using drag, instead of burning propellant. It's slower than a propulsive burn but can save a lot of fuel, especial... |
[
{
"speaker": "user",
"text": "What is orbital decay?"
},
{
"speaker": "omie",
"text": "Orbital decay is the gradual lowering of a spacecraft's orbit over time, usually caused by atmospheric drag at low altitudes. Left unchecked, it eventually leads to reentry, which is why satellites in low orbi... |
[
{
"speaker": "user",
"text": "What is a launch window?"
},
{
"speaker": "omie",
"text": "A launch window is the specific time period during which a rocket must lift off to reach its intended orbit or trajectory efficiently. For interplanetary missions this can be a narrow window that only opens ... |
[
{
"speaker": "user",
"text": "What is Kessler syndrome?"
},
{
"speaker": "omie",
"text": "Kessler syndrome is a theoretical scenario where the density of objects in orbit becomes high enough that collisions create debris, which causes more collisions, in a runaway cascade. It's a growing concern... |
[
{
"speaker": "user",
"text": "What is a Lagrange point?"
},
{
"speaker": "omie",
"text": "Lagrange points are positions in a two-body system, like the Earth and Sun, where the gravitational forces balance in a way that lets a small object stay in a stable or semi-stable position relative to both... |
[
{
"speaker": "user",
"text": "What is RP-1?"
},
{
"speaker": "omie",
"text": "RP-1 is a highly refined kerosene used as rocket fuel, typically paired with liquid oxygen as the oxidizer. It's denser and easier to handle than liquid hydrogen, which is part of why it's popular for first-stage engin... |
[
{
"speaker": "user",
"text": "What is hydrazine used for in aerospace?"
},
{
"speaker": "omie",
"text": "Hydrazine is a hypergolic propellant commonly used in spacecraft thrusters and satellite propulsion, since it ignites on contact with an oxidizer like nitrogen tetroxide without needing an ig... |
[
{
"speaker": "user",
"text": "What is a wind tunnel used for?"
},
{
"speaker": "omie",
"text": "A wind tunnel is a testing facility that moves air past a stationary model to study aerodynamic forces and airflow behavior. It lets engineers measure lift, drag, and flow patterns before committing t... |
[
{
"speaker": "user",
"text": "What is computational fluid dynamics?"
},
{
"speaker": "omie",
"text": "Computational fluid dynamics (CFD) is the use of numerical simulation to model how fluids, including air, flow around an object. It complements wind tunnel testing by letting engineers explore d... |
[
{
"speaker": "user",
"text": "What is the difference between a fairing and a shroud on a rocket?"
},
{
"speaker": "omie",
"text": "They're generally the same thing -- a protective aerodynamic covering over the payload at the top of a rocket, shielding it from air pressure and heating during asce... |
[
{
"speaker": "user",
"text": "What is a launch escape tower?"
},
{
"speaker": "omie",
"text": "A launch escape tower is a small rocket mounted above a crew capsule that can rapidly pull it away from the launch vehicle in an abort scenario. It's a specific implementation of a launch abort system,... |
[
{
"speaker": "user",
"text": "What is the Karman line?"
},
{
"speaker": "omie",
"text": "The Karman line, at 100 km altitude, is a commonly used boundary marking the edge of space, above which the atmosphere is too thin for aerodynamic flight to generate meaningful lift. It's not a hard physical... |
Omie Aerospace QA
Small hand-curated set of aerospace engineering Q&A pairs. Built as one of the training sources for Omie, a small from-scratch language model.
83 pairs, single-turn. Covers propulsion basics (Isp, delta-v, staging, engine types, nozzles), orbital mechanics (Hohmann transfers, geostationary orbit, escape velocity), aerodynamics (stall, drag, Mach, sonic booms), reentry/materials (Inconel, ablative heat shields), and flight computer / hobby rocketry stuff (apogee detection, static margin, N2O/ethanol, hybrids).
Not scraped, not model-generated. Written by hand because nothing decent already existed for this; everything on HF tagged "aerospace" turned out to be extractive QA over NTSB incident reports (short spans, not real answers) or empty repos. If you know this domain better than the answers here, open a PR, half of this could use tightening.
Format
{"turns": [{"speaker": "user", "text": "..."}, {"speaker": "omie", "text": "..."}]}
One line per example. speaker is user or omie. Swap omie for whatever role name your setup expects.
Why this exists
Wanted a small aerospace source to fold into Omie's training mix alongside general-conversation data (no_robots, oasst1, empathetic_dialogues, personachat). Didn't find a human-written conversational aerospace dataset anywhere, so made one instead of forcing an off-topic fit.
License
GPL-v3.0
- Downloads last month
- 33