In this case lots of fuel is the wrong approach, I can get more than half way around Kerbin on 2 cans of Jet Fuel and a turbojet if I glide most of it. You can do that by right-clicking the engine and clicking "Toggle Mode." That's sub-optimal, because having the fuselage pitched like that means it'll have more drag than it otherwise would have. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You'll notice that usually your prograde marker is slightly below your pitch. The most obvious solution is try and optimize your craft for high altitude lift by giving it long wingspan like a U-2 spyplane. I wasn't expecting so many excellent answers! Thankyou all, I now reckon I have a much better understanding of the engines, hopefully that'll translate to better aircraft. jet engine efficiency in this game is based on built in thrust curves. 3x06: I design a new, high altitude, jet to collect high atmospheric science. In addition to the traditional giant tube of explosions that flings things up high approach, Kerbal Space Program includes a very useful piece of equipment that became quite popular in the 20th century: wings.. surface of jool. 20 votes, 21 comments. Why do many companies reject expired SSL certificates as bugs in bug bounties? If not, please explain why, which I know you have no problem doing! Using Kolmogorov complexity to measure difficulty of problems? Clear editor. Whiplash is the engine you would want to use on a plane meant to go 20km. "Whiplash" Turbojet. So I'm pretty darn new to KSP, and my career has barely gotten started, and the jobs for crew observations seem to dominate 1 Pod outside the level 3 VAB. How do you get out of a corner when plotting yourself into a corner. If it's above the cross-hairs, you need a little less. If it's above the cross-hairs, you need a little less. Note: Your post will require moderator approval before it will be visible. Mounting a time-limited rescue mission for kerbal inbound to Kerbin. It is usually best for initial designs to be based on logic and real-world physics and then be prepared to experiment with non-logical alternatives for optimisation. These designs are great for getting around Kerbin quickly, but without going orbital. Thanks, I'll go try to stuff a few extra turbojets and intakes on my plane Do you know how many intakes/turbojet are needed to run in the regime you described? Which makes this engine ideal for those missions which require doing many science activities above particular altitudes. to topics in this videoJet Engine Concepts: 0:30Air Intakes: 1:13Flameouts: 2:22Control Surfaces: 5:08Flying Tips: 5:57This video will go over everything that you need to know about to design a capable plane that can fly in the thinnest of atmospheres. I was even able to do this with three pairs of Junos instead of the large jet engine pair (I don't have the technology level for that). I decided to look into that two intakes thing, and it turns out to make 11-12 m/s difference at 19,000m with my plane. Pvt. Editing Kerbal Space Program save files for KSO, Rasterpropmonitor for Kerbal Space Program. Or you need to put a little bit of angle of incidence in your wings, which will reduce drag since you don't have to pitch the entire plane up, but will be stuck at a fixed angle meaning you'll have to pitch up or down anyway during certain phases of the flight that the plane isn't optimised for. You are simply running out of atmosphere (i.e. Press J to jump to the feed. Please consider starting a new thread rather than reviving this one. Any advices for building a vehicle for this task? (the engines will use very little at high altitude anyway). KSP doesn't care (much) about aspect ratio; the total lift is the same regardless of configuration. A jet engine from KSP 0.18 A jet engine is an air-breathing engine which uses onboard liquid fuel and combusts it with the oxygen drawn from the atmosphere. Jets drop thrust at higher altitude and speed, but also drop . New comments cannot be posted and votes cannot be cast. as a rule of thumb they all lose thrust at higher altitudes and at high velocities. Ideally, you'll want to avoid these contracts until you get the High-Altitude Flight tech node and the improved jet engine that comes with it. Only the fuel tanks attached to rockets have any oxidiser in them. But maybe your patience? Thats my problem right now. I generally don't fuss with AoI unless I'm making a long range cruiser. Upload or insert images from URL. Chapter 4. I was generally under the impression that basic jets were mostly deadweight on high-performance aircraft: while they are superior for low-speed, low-altitude operations, they become deadweight at hypersonic velocities. What altitude and speed should I go? Arqade is a question and answer site for passionate videogamers on all platforms. - "In Space High" means your craft is inside the given Sphere of Influence and above the "Space Border" altitude listed in the Celestial Body Multiplier Matrix. These are the building blocks of solid spaceplane design!Subscribe! All rights reserved. If you nudge your wing's angle up slightly with rotate tool then it'll move your prograde closer to your direction of flight and significantly reduce drag. Content titles and body; Content titles only But. So that means that even if you are inside the atmosphere but still orbital (such as during aerobraking), your science will not count as "Inside the atmosphere", For example, orbiting Kerbin above 250km altitude, your science is counted as "In Space High over Kerbin." principle. This means that the only thing that decides wheter your engines run efficient is determined by how much thrust they produce (opt. Cheers again fellas. If drag were the only concern, at any given altitude the slower you go, the less fuel you need: the work done by drag over a distance grows linearly with speed (the force grows quadratically with speed, but the time falls linearly). Secondly don't think of engines working better at different altitudes, think of them working better with different air intake quantities. This makes jets built using this engine considerably more maneuverable. As you found out, it basically konks out at 15km. Dedicated to the growth and advancement of amateur rocket scientists! Your answer got me in the right direction, though I ended up with a different design (see my own answer). Using very light "engine rich" planes and "reverse swooping" (building velocity at 10km then gently curving up) you can temporarily get above 20km with Wheesely and Juno. - "In Space High" means your craft is inside the given Sphere of Influence and above the "Space Border" altitude listed in the Celestial Body Multiplier Matrix. Reddit and its partners use cookies and similar technologies to provide you with a better experience. If too much air runs into the turbine, the excessive amount just flows out unused through side-vents (I think). Please consider starting a new thread rather than reviving this one. To get higher with the low tech jet engines, you need rocket assist. I followed a similar strategy. (Disclaimer: I've never used FAR myself; all of the above is based on my experience with stock aerodynamics. Be aware that heat buildup can gradually become a problem when the afterburners are used in sustained flight. It flames out at 25,000. When you are surrounded by plenty of air there will of course be no need to suck in air artificially but the higher you get the less dense the air around you becomes and in order to make sure that your engines have enough oxygen to burn the fuel it needs to suck air in forcefully. A destructible memorial to the old Mk. Grichmann's answer has been the most reliable way I've found to complete these missions. I also set it to enable the cockpit's reaction wheels to improve control at high altitude, and close air intakes to reduce drag. Is anywhere a list of the altitude levels (I don't know a better term) available? It's also worth noting that this engine has the widest thrust vectoring range of all of the jet engines, with a full 10-degree range in all directions. Because of the exponential nature of the rocket equationthe orbital rocket needs to be considerably bigger. If your using NEAR/FAR, once you get high and fast, kill the engine and glide to save fuel. lost birth certificate near berlin; ksp high altitude plane. Kerbal Space Program Jool Landing Youtube. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Since gravity is effectively lower, they don't need as much wing area to maintain altitude-- which, in turn, means less drag, which makes for more efficient flight. At that point your engines will be running about .7-.8 efficiency and you will be out of the thicker atmo which will allow you to go faster. Thanks for the help! She has a horrible turn rate and oscillates a couple of thousand meters at cruise, but it's flyable. To avoid running out of fuel altogether, I have a second plane with small tanks (no oxidizer) attached directly to the jet engines, and the rockets attached behind the fuselage, which is entirely oxidized tanks. Because when your engine has to take in air forcefully it automatically means there isn't enough surrounding your engine and that again means that air density and therefor air resistance must be pretty low too. If too little air runs into the turbine your combustion chamber will not be able to burn up fuel effectively due to the lack of oxygen. Now lets combine these two indicators: The best performance your engine can achieve is when you have an optimal amount of Air Flow (obviously) but also the MAXIMUM amount of Air Intake. Clear editor. All the information you could want to know about science, including the altitudes for each celestial body, and what altitudes a given experiment works on are available at: Once it's in the air, it's stable and easy to fly and manages to fly at altitudes between 11k 12k without problems. KSP Quick Guides: High Altitude Design and Flying - Stock v.23 Stoober AK 3.32K subscribers Subscribe 21K views 8 years ago This tutorial will cover designing and flying a plane that can soar. But my guess is that these same general principles would probably apply to FAR, and that all that would change would be the numbers involved. First off as of .15.1 intakes don't do anything. Slap that behind a plane you'll be able to go beyond 20km without any trouble. Note that KSP planes get one substantial speed benefit that's much more pronounced than IRL aircraft, due to the freakishly small planet sizes: they're actually flying at a large fraction of orbital velocity. It is boosted into space by a launch vehicle, then re-enters Earth's atmosphere and lands as a spaceplane. 3.) A little while back I spent a long time trying to circumnavigate Kerbin on the least liquid fuel possible (i posted the record to the sub: 254 units of fuel. In my case, it brought me to 20km up at a 45-degree angle, but it is probably not optimal. Kerbal Space Program 2 . More air is better. Highest and fastest possible is best. Main goals: Auto-trimming. You could try combining the two. I've been finding it difficult to build a jet that can fly over 15km alt. Your previous content has been restored. As has been said, ISP is nothing to worry about. 1.) Rockets aren t the only way to get to space. All other versions are slower and lower and unstable in turns. You get tons of thrust if you put it into "wet" mode, but you lose fuel efficiency. The thrust of jets (turbo or otherwise) depends on airspeed: basics deliver more thrust at low speeds, while turbojets only really come into their own when you fly very fast (which also means flying very high, 20km and over). How can I make money in the new career mode? Once I'm near or in the target area, I set the throttle to 0 and start the Swivel. So I've created those two planes, both with weasley turbofan engine: This is your problem-- as folks have pointed out, it's not a high-altitude engine. Since turbos are almost always enough to get you off the ground and up to altitude, I usually just do straight turbojets (with some RAPIERs for SSTO spaceplanes); the minute amount of fuel saved during the ascent isn't worth lugging those superfluous engines around at the hypersonic regime. 2022 Take-Two Interactive Software, Inc. Use the reaction wheel to hold your attitude slightly nose down as you float down and you can guide yourself like a paraglider. Is it possible to get to an altitude of 16-20km with normal plane engines? Cookie Notice So now to come to an end: from my experience I'd say for a medium sized aircraft it is best to fly between 12-13 km. I looked into the .cfg files and there are no special properties allocated to them. Note that KSP planes get one substantial speed benefit that's much more pronounced than IRL aircraft, due to the freakishly small planet sizes: they're actually flying at a large fraction of orbital velocity. Paste as plain text instead, Even up there the plane acts squirrely. They will someday, but they don't now. Press question mark to learn the rest of the keyboard shortcuts. That's all true, but just read the OP: hypersonic appears to be completely out of the question. Let me share what I know about jet engines, speed, and efficiency. The ideal case for optimally efficient flight (which is what you want if you're trying to maximize cruise altitude) is when your wings are mounted to the body, pitched up just enough that when cruising in level flight, the body of the aircraft is pointing perfectly . Your engine burns the same amount of jetfuel per second regardless of how high or fast you are! Ksp engine altitudes I've been trying my hand at some High altitude speedy planes for a while now, but can't seem to get a hang of the altitudes that each engine likes, I know kerbal isn't earth, so looking up the crushing altitude of say the sr71, doesn't seem to apply, but I was hoping that others experiences would help me. Be sure to have enough intakes (I think maximum efficiency in stock is 1 ramjet intake per ~2 tons of plane, though that is aesthetically ridiculous), and if you're still running short of intake air, you can dip down a bit to speed up and get to denser air. Let me. Hopefully this will be helpful to you. If released at a speed of 700 or more m/s and an altitude of 20 or more km, the satellite will achieve orbit with its second stage mostly full, leaving it with approximately 1600 m/s of delta-V -- enough to achieve lunar or interplanetary orbits and, on small bodies, landings. Your link has been automatically embedded. What you should be concerned about is atmospheric drag, and that's minimized by high-altitude flight. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Is there a single-word adjective for "having exceptionally strong moral principles"? Thrust means that slower-is-better no longer applies: now, slower means less drag but more gravity, so there's a tradeoff (which I'm not going to carefully calculate for you, because it's hard).
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