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If it's below the cross-hairs, you need a little more AoA. Jet engine - Kerbal Space Program Wiki Why is there a voltage on my HDMI and coaxial cables? Kerbal Space Program - Wikipedia Turbojets are so ridiculously efficient that it doesn't really matter. I don't have any exact numbers for you, but you can right-click an engine in flight and it will show both current and optimal airflow, which should hopefully let you work out the best altitude. Chapter 4. [Solved] 30 20 / 1 1: The basics 2 2: Setting it up 3 3: First flight 4 4: Finishing touches 1: The basics First of all, you're going to need an airplane. It was meant for low altitude flight. This causes the body of your plane to generate additional drag. Building a rocket to fly vertical seems to be nearly impossible, in the atmosphere they tend to become unstable (or maybe I missed a trick?). Air Intake) and how fast your aircraft ultimately flies (air resistance/altitude)! Each stage of the rocket has a delta-v that depends on the stage fuel mass and the engine specific impulse. Your answer got me in the right direction, though I ended up with a different design (see my own answer). At this point the plane plummets, but as it goes deeper into the atmosphere, it regains pitch authority, and at 10km it's enough to regain control and turn it around for a safe landing. So if you want to make a plane go as fast as possible, you want to minimise both angle of attack and angle of incidence necessary to sustain level flight at your target speed and altitude. Rockets aren t the only way to get to space. Connect and share knowledge within a single location that is structured and easy to search. 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. They always seem to lose power at about 15km, but I'm wondering if there's something I can do to fix that. I got this game so I could over-engineer rockets, so I mostly ignore the airplanes. With some fins to keep you stable and careful aim, you can hit your desired location and altitude and will have 5-10 seconds to collect data before you hurtle past it and pull your chute. If your using NEAR/FAR, once you get high and fast, kill the engine and glide to save fuel. Control Sensativty for Planes - KSP2 Suggestions and Development http://www.youtube.com/user/Cruzanak?sub_confirmation=1Quicklinks 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. Also, Valley and Theomon fly to different corners of Kerbin and three mapping satellites are launched. Subscribe - http://www.youtube.com/c/MikeAben?sub-confirmation=1 Patreon - https://www.patreon.com/MikeAbenPatreon supporters receive early, ad-free, access to videos, kOS and craft files, and more. Discord - https://discord.gg/HTvT7dZ Making Space Home Playlist - https://www.youtube.com/playlist?list=PLB3Ia8aQsDKhqoFyoZ4d33MG7rS9KmDm_0:00 - Designing the Dudley Mk16:42 - Test Flights \u0026 Iterating13:45 - Col. Valley take the Seaplane to the Northern Ice Shelf19:30 - Launch \u0026 Insertion of the Maxwell Vb21:04 - Col. 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Clear editor. Listen to this guy, don't go much farther above 15000 with high altitude engines. When added to a plane it allows tuning of the controls vs speed/altitude/G load/other factors. You can go above 20km with the J-404 Panther. Don't worry about Isp. Mounting a time-limited rescue mission for kerbal inbound to Kerbin. Is it even possible? You can spin around the whole world on just fumes. I did some testing and found that the turbojets get the best Isp around 5.2 km altitude, so I was thinking of flying at that altitude. J-404 "Panther" Afterburning Turbofan - Kerbal Space Program My question is really about controllability. CONTROLABLE plane for ~20km altitude? :: Kerbal Space Program General Most efficient cruise altitude for jet planes? : r/KerbalSpaceProgram 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. Or it can supercruise at three times the speed of an equivalent Wheesley jet (with nearly equal fuel efficiency) at 15,000 m altitude. Main goals: Auto-trimming. You cannot paste images directly. The easiest "default" way to build a plane in KSP-- i.e. The high performance engine for me performs pretty good till about 15000 meter. If you have an account, sign in now to post with your account. From my observations I can say that "Efficiency" is not a good indicator of how well your engine performs. You cannot paste images directly. To get higher with the low tech jet engines, you need rocket assist. The idea is to slow the plane to a stall above your landing spot the pop the parachute. All other versions are slower and lower and unstable in turns. As has been said, ISP is nothing to worry about. The other thing to bear in mind is that tuning the AoA (angle of attack) of your wings makes a difference. Another approach, which I was managing with some success before I figured out jets, is to build a rocket and catapult yourself towards the measurement point. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Laythe - Kerbal Space Program Wiki This lowers their effective "weight"-- for example, a craft flying at 1400 m/s on Kerbin is effectively flying as if gravity were only 2/3 of its actual value. If you enter the Mun's SOI, it immediately counts as "In Space High over Mun" until you get below 60km Mun altitude. Air Flow: Air Flow represents with how much force air passes the turbine (notice: different amounts of air at the same speed equals in different amounts of force!). Best altitude to fly a plane? - Kerbal Space Program - GameFAQs Incidentally, for these speeds and altitudes, ordinary jets are the better choice. (Actually, four ways: but balloons aren't in the stock game) Lifting surfaces are great but they lose effectiveness just as fast with altitude as drag falls. I'm in career mode and got all groups of the 45-science-cost level, except Flight Control, and additionally have Electrics, Heavy Rocketry and Fuel Systems. Your airspeed is mostly limited by terminal velocity; you can go much faster if you climb a little higher. You arent doing anything wrong. It may take some practice to hit your target area this way, because you'll be picking up additional horizontal speed, and thus it's possible to under or overshoot. A well-designed jet with this engine and with the afterburner lit, flown properly, can momentarily climb to 30,000 m altitude. Do plugins for Kerbal Space Program work on unix? It is designed to aid in player-controlled flight on generic (space)plane, providing a soft layer between user joystick\keyboard input and control surface outputs. KSP Quick Guides: High Altitude Design and Flying - Stock v.23 I was hoping that the new intakes would give it the added altitude. Maneuver node plans don't take drag into account, so you'll have to overshoot quite a bit to compensate. I don't have the numbers handy, but you can expect something like 400m/s at 15km. To get there, you're going to want to climb at the fastest rate you can manage to 18-20 km, at which point you should mostly level off and start accelerating horizontally. The J-404 "Panther" Afterburning Turbofan is a jet engine added in version 1.0.5. I've since shaved that down more but that was by going even higher and even faster). Planes and Altitude differences. :: Kerbal Space Program General The benefits should be obvious. Things that work at low altitude don't work so well up high and the plane ends up going up and down while slowly losing speed until it can't maintain altitude anymore. That will probably allow you to fly comfortably above 20-25km (or higher, depending on the overall mass of your aircraft). I would like to know which altitude I have to maintain for my experiments. Building a High Altitude Jet | Stream pt. You get tons of thrust if you put it into "wet" mode, but you lose fuel efficiency. Its an approximation missing someelements. You can post now and register later. Approximately 12km up the main engines stop providing enough thrust to maintain the climb, so it's time to switch to rocket mode. 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. In the game, players direct a nascent space program, staffed and crewed by green humanoid aliens known as "Kerbals". First is thrust; the higher you get, the lower the thrust your engines deliver. Pvt. Not only does it conk out at high altitudes, but also it conks out at high speeds, and you need to be able to go fast to fly up high. The U-2's published maximum altitude is somewhere above 74,000 feet. Make sure you have lots of control surfaces because at very high in the atmosphere, there's not much air for the wings to control the craft with. 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. GitHub - Boris-Barboris/AtmosphereAutopilot: Plugin for Kerbal Space The most efficient way is, of course, to make a high altitude (or space) plane. 2022 Take-Two Interactive Software, Inc. Make sure we're on the same page with terminology. Be aware that heat buildup can gradually become a problem when the afterburners are used in sustained flight. I also added a parachute and decoupler since I find it too hard to correctly land this thing yet ;-) I managed to land in the water once, though. It'll probably be more efficient with more intakes, but I wouldn't increase the number of engines. 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). What are the altitudes for the various altitude record contracts? Kerbin | Kerbal Space Program Wiki | Fandom ksp high altitude plane - digitalidentityorganization.com By climbing, you reduce drag, exponentially with altitude. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. You do get certain inertial and lever-arm effects, but those aren't really relevant to 'do I have enough lift to stay up'. What you should be concerned about is atmospheric drag, and that's minimized by high-altitude flight. air) that high up. Pretty often, the tail "wiggled" and/or the plane became totally unstable when I fired the rocket boosters. That annoys me but I can't seem to get a design to make it work. Upload or insert images from URL. *I use FAR these days, which basically means completely replacing every spaceplane and rocket you ever designed to account for its much more realistic aerodynamics. Only the fuel tanks attached to rockets have any oxidiser in them. Delta-V is the velocity change necessary to perform orbital maneuvers. Cookie Notice Welcome to the forums. The Boeing X-37, also known as the Orbital Test Vehicle (OTV), is a reusable robotic spacecraft. Is it correct to use "the" before "materials used in making buildings are"? So, to correct " is below crosshairs", what you need to do is to add a little AoA to the wings. Thanks for the help! A temple in the desert (6 29 47 S 141 40 3 W) known as Tut-Un Jeb-Ahn, although this name can only be seen when a vessel crashes into it. From my experience using a panther it starts to lose speed after 15-16 kms, a more suitable cruising height is 9-13km. - Inside the atmosphere works the same way, except you need to be on an suborbital trajectory. 1Altitude requirement 2Orbit 3Speed, range, and altitude 4Flight duration 5Flight profiles 5.1Ballistic missiles 5.2Tourist flights 5.3Scientific experiments 5.4Sub-orbital transportation 6Notable uncrewed sub-orbital spaceflights 7Crewed sub-orbital spaceflights 8Future of crewed sub-orbital spaceflight 9See also 10References Exorcet's Content - Kerbal Space Program Forums Though I'm still working on learning to be better at space planes. There's basically three ways to do that: lifting surfaces, thrust, and orbiting. I am currently designing a mission that will involve several very long distance plane flights. high altitude flight :: Kerbal Space Program General Discussions Please consider starting a new thread rather than reviving this one. I only seem to be able to make planes that can fly a bit below that altitude and then temporary rise to it. It will be expensive and time consuming. I'm trying to build a high altitude plane and have found out that the rules are different. The flight time won't be as long, but you'll be able to fly a "plane" above 18km. Ep. 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). 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. Orbiting is the most fun one: the higher the orbit, the less speed you need to maintain to stay in orbit, *and* the less air there is, so that's a double-whammy in terms of reducing fuel consumption. jet engine efficiency in this game is based on built in thrust curves. A well-designed jet with this engine and with the afterburner lit, flown properly, can momentarily climb to 30,000 m altitude. And how many km can I expect to get per v (as calculated by Engineer redux Kerbin atmospheric stats, I know this is weird with planes)? Remembering the FW TA152 and the U2 I put long wings on it and while its turn rate makes an airliner look like a fighter plane it is stable enough at 19000m. Technically, any rocket engine is also a jet engine as it forms a high-speed jet of reaction mass. - Insane TWR didn't help. Been a while since I've flown stock*, but I've heard that, for maximum efficiency, you want one turbojet for every 7.5 tons, and about four ram intakes for each turbojet. You cannot paste images directly. This way control surface max deflection can be programmed by an aircraft designer to make . 600+ m/s) and low altitudes (e.g. Is it possible to get to an altitude of 16-20km with normal plane engines? 2022 Take-Two Interactive Software, Inc. AoA itself refers to the angle of the wing (or the whole plane if the AoI is 0)relative to the airflow. Display as a link instead, 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. Even better, burn a little more, and you can pop out of the atmosphere for a bit and avoid all that nasty drag stuff. Redoing the align environment with a specific formatting, Trying to understand how to get this basic Fourier Series. How can I make money in the new career mode? What are the units of measure used in Kerbal Space Program? Whiplash is the engine you would want to use on a plane meant to go 20km. 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. At about 400-500m/s (~15km), the two engines are even. Sideslip handling. You also need to be going very fast to generate adequate lift at high altitudes and unlike the real U-2, you don't need to fear about overspeeding and destroying the plane. Paste as plain text instead, if you just go into the SPH, slap together some parts like Legos, and go-- is to attach them with zero AoA. The Kerbal Space Program subreddit. Just sounds like the engines can't get enough air, in KSP high speed also generates air intake so I'm guessing what is happening is that you have the initial speed to get to altitude but the lack of air at altitude is starving the engine resulting in lower speed which further reduces air intake and it cascades until either the engine shuts down or you return to denser atmosphere at a lower altitude. Your decreased flight time means you probably won't make it to your location. However, I've failed to build a vehicle to achieve this (without a hundred retries). Grichmann's answer has been the most reliable way I've found to complete these missions. Are you using Stock or NEAR/FAR? You need to do it with what you've got. Very cool. In the stock atmosphere, the benefits of moving faster outweigh almost everything else.