![]() once you are in orbit, thrust is far less important. Raw thrust is important for launching from a planet since you have to overcome gravity (and the atmosphere) to get to space. most of the mass of a rocket is fuel, not hardware. the most important thing to understand about rocketry in general is that anything that goes up into space or moves around in space requires LOTS of fuel. The engine is only a small fraction of the total mass of the whole vessel, so the TWR of the engine itself is only relevant in fairly extreme cases. In orbit excessive TTW is actually a negative. SO long as your rocket is above 1 for any suborbital maneuvering (landing, launching) you're OK - a better number would be about 2 to 3 total TTW. Only TTW has any importance at all really, and only then when you are suborbital. I will agree with what most others are saying though - ISP is the number you should be looking at. So an engine with a great TTW on it's own, but poor ISP is still going to have a lower total TTW than an engine with lower per engine TTW, but better ISP. Unlike a car or something like that, fuel makes up the vast majority of the mass of a rocket, and thus the weight. What should be considered for TTW is the overall TTW of a rocket, not the TTW of an engine. What I think you mean is that TTW (Thrust to Weight) determines your acceleration, but this even is only half true. I wouldn't say thrust to weight ratio determines how fast you can go with a unit of fuel. Originally posted by lizrdfishr:Azunai and you are looking at two different aspects of the game. You may end up needing fuel cells to burn fuel to charge your batteries when you are way out there by Sarnus (OPM). Yes they are VERY efficient, but the further from the sun you get, the less efficient your solar panels will be and the longer it will take to charge batteries. The slower you burn the fuel, the more efficient the engine tends to be. The further away from fuel sources you go, the more efficient you need to be. Your ability to have enough fuel to stop and do what you want when you get there is. Burning fuel to go fast means you have less fuel AND need more fuel when you get wherever you are going. If you go faster, you need more DV to slow down into orbit when you get where you are going. Once you reach orbit, you no longer need speed to get you beyond the gravity well of an object in space. Speed only really matters to reach orbit. ![]() Specific impulse will tell you how far you can go per unit of fuel. Thrust to weight tells you how fast you can go per unit of fuel. I don't have the DLC's so they are out of the race, too.Īzunai and you are looking at two different aspects of the game. How is it irrelevant? I mean the engine should be more efficient the less weight/mass it has compared to its thrust, doesn't it (because it has to move less mass)? something close to 400s if memory serves.Īnyway, the nerv has 800s so there's really no competition at all. I think the highest Isp for LF/O engines was on one of the DLC engines (wolfhound?). Next best is the nuclear engine (NERV) which is about twice more efficient compared to the most fuel efficient LF/O engines. also their fuel can't be created on the fly with drills and ISRU. Highest Isp in the stock game is probably the ion engine, but they have super low thrust and are really only useful for lightweight stuff. that determines the actual efficiency (ie. You can only do this in the VAB, not during flight.Originally posted by Azunai:the thrust to weight ratio is almost irrelevant for an actual spaceship.įor long range missions you're looking for engines with the best specific impulse. You have to do this switch in the VAB by right-clicking on the generator and changing the type (there's a button to change it). When I switched my 2.5m generator to use the KTEC Solid type, it worked. ![]() I don't know what the heck is going on and nothing online is helping me (the documentation for the mod is REALLY bad =P).ĭoes the antimatter containment need to be directly attached to the reactor? What am I missing?Įdit: Found it. Nothing changes the fact that my Antimatter reactor is outputting 0 KW. I have turned the microwave receiver on and off, the smaller reactor on and off, all just to see if there's something weird going on. The problem is, it says it's outputting at 0 KW (0%). ![]() I'll get into orbit using my microwave power network, and get a fair amount of antimatter (1500 or so), and then try to turn the antimatter reactor on. Finally, I top it all off with an Alcubierre drive and 4 huge radiators. I successfully got into a 900km orbit with a ship that has 2 collectors, a 62.5m generator/fission reactor for backup power, a 2.5m generator/antimatter reactor for primary propulsion (Quantum Vacuum plasma thruster for primary thrust), and I also have a 2.5m antimatter containment unit. So, I got up to getting Antimatter reactors, and I'm trying to use them. ![]()
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