Here is your convenient solution to this problem! This aircraft can takeoff at just above 50 m/s and can glide for a few minutes without engine. The plane is clearly unstable. Plane bouncing on takeoff - Gameplay Questions and Tutorials - Kerbal Space Program Forums Hello, I am having a small problem with a plane I have built. It helps to have a center of gravity which is close to your engines so that the landing gears can be close to both. Heavy transport seaplane inspired to the Soviet Beriev A-40 Albatros which also appears in Evangelion 2.0! If your aircraft is burning up during this stage, you may need larger wings to slow you down faster, radiator panels to carry away the heat more effectively, parts with a higher temperature tolerance (like the Mk2 liquid fuel fuselage instead of the Mk1 liquid fuel fuselage), or parts to increase your maneuverability, like RCS thrusters, reaction wheels, or canards and elevons. If the problem has to do with lift then travelling very slowly, possibly even slower than that, should counteract the effects of lift and you won't drift nearly as much. You can also use parachutes on landing, but care must be taken to ensure that an adequate length of runway remains since you'll only get one chance to use them. Subscribe! I have found a solution to my problem. (Yes, you personally, you lucky thing! An active front brake can cause your aircraft to rapidly and uncontrollably pivot left or right during landing, and high friction from the front wheel can potentially cause your plane to swerve violently both in landing and takeoff. I dont really need 200m/s for take off. For some reason, when the plane is trying to take off and pulling up, the plane begins to bounce on it's front wheels (the back wheel kicks up), whichhinders the plane taking off. To minimize drag, vertical tail fins can be kept minimal, since aircraft can be maneuvered adequately by roll and pitch alone. In an aircraft with two or more engines, this can potentially cause you to enter a flat spin which can be unrecoverable if your center of mass is behind your center of lift. After placing wheels I always use the rotate gizmo on snap with absolute orientation. To maximize lift, your aircraft should rest on the ground with the fuselage tilted upward at anywhere up to a 25-27 angle so that the wings will end up tilted back at up to 30. Mk2 aircraft may be able to get away with it, but even then it's often best to space them further out. This is for the same reason that you keep your fuel balanced. Here are a few pictures of it: Take a picture with center of mass and center of lift turned on. "Type E" is the smallest you should have, and you want a set of those connected at the back of the fuselage. For this to happen, I'm assuming you're using rocket fuel tanks. Center of Mass and Center of Lift are the usual causes of instability. Spaceplanes generally ascend best on a 10-30 degree incline, often leveling out towards higher altitudes to pick up the maximum horizontal velocity before switching to rocket motors. If, instead, all goes well, then once your jet engines have shut down you will need to start the second part of your space mission by switching to rockets. 2022 Take-Two Interactive Software, Inc. Hit the launch button and watch your magnificent bird fly! If you pull up and cause the tailwheel etiher to hit the ground if it was already up or push it into the ground if it was still in contact, you will create bounciness. Such as not producing lift, which is not what you want with a plane. All of these problems can be exacerbated or reduced by adjusting the amount of fuel in your tanks during landing. Bit late i know, but i had the same problem. Vice versa a plane with lots of control surfaces will be perfectly controllable (maybe even too much) but may have big difficulties with taking off and landing at reasonable speeds. To survive re-entry, it's recommended to start your approach back into the atmosphere at a shallow angle, ideally with a periapsis of around 30-35 km. If your rear wheels are too far back the aircraft will not be able to pivot on the wheels and lift its nose up. Thanks for the help guys. In fact, nothing will happen at all, and that's probably bad, so put an air intake on your plane anyway. 5.whether the body you anchor the landing gears to are firm. So yesterday I was playing some KSP2, and resumed the game from a save where I had landed in Duna. Suggest a Correction Copyright 2023 Nexstar Media Inc. All rights reserved. To recover the most value from your spaceplane, you should try to land on the runway at the Space Center (this tutorial, although it has been written for spacecraft and not spaceplanes, is a great help). If you plan on either dropping off cargo or picking up cargo and traveling with it, you'll generally want to locate your cargo bay at the middle of your center of gravity. The FedEx plane pulled back up in time to avoid a collision. But also check to make sure that your wheels are placed symmetrically and your engines are aligned properly. When gear is placed, it has just one point of attachment. This plane will be able to take off, travel somewhere, perform a crew report, and then land. Having landing gears near the front and back of your aircraft can also help to ensure that you won't break your engines or smash your cockpit into the runway. 2 will usually do nicely, but 3 or 4 are usually better (but of course heavier, and this tutorial assumes you use 2). Just after having taken off, the plane will immediately start rolling to the right, and completely uncontrollably. You can post now and register later. Symmetry placement should give you perfect symmetry, as far as the game is concerned. and our Some testing is usually required with new designs to determine the best ascent profile. KSP handling death investigation High Winds Cause Widespread Power Outages Ohio . When your altitude reaches 35km, start pulling up gently. You can either go with four "LY-O1 Fixed" or a tricycle of two LY-01 near the back and one "LY-05 Steerable" at the front; either is fine for now. All rights reserved. Powered by Invision Community. Temperature tolerance is the primary consideration for fuselage choice. 67K subscribers in the KerbalAcademy community. I made this aircraft based on real life commercial jet design. You should be able to navigate fairly readily, and with the superb efficiency of jet engines, you should have plenty of fuel to go anywhere you need to go. It's a prolem enough I have sever differen gear subassemblies that are stable (un wobbly) I can then position depending on COM. You want to start by attaching a Mk 0 Liquid Fuel Tank under the wings, making sure you're mirrored so it goes under both wings. Even if you can takeoff, landing will usually destroy tat aircraft so survival rate on an aircraft for a typical kerbal is nearly zero. Unstable Aircraft: "FAR Firehound" (Stock). I've had stability issues in planes where I'd have proper gear setup, balanced weight and lift. Do you have a screenshot of the craft? Tell ya what, I'm gonna try to recreate that thing in my sandbox and see what I get. First thing you're going to want to do in the SPH is turn on your centre of mass indicator (this is the point that the plane will rotate around when rolling, pitching, or yawing) and your centre of lift indicator (the Aerodynamic Overlay). Everything looks perfectly symmetrical as far as I can tell. Does anybidy have any tips on how to build spaceplanes? So I have played the game for 200 hours and I love it. - Make sure the landing gear is as close to the center of gravity as possible, just slightly behind it (for nosewheel aircraft). In vanilla KSP, wings have a predefined lift factor. These occur at their worst when your center of gravity is far ahead of your rear landing gears and you have a heavy plane at high speeds and a high angle of attack on landing, resulting in your front landing gear rapidly striking the runway after your rear landing gears touchdown. The SSTO I took to Laythe recently has only one minor flaw using this design, I have to raise the landing gear and pull back slightly to take off. All I have are the parts from the Aerodynamics tech and the gear bay (wheels). I also used Intake build aid to balance the intakes. However, don't bother going overboard with intakes because your engines will still shut off at high altitudes due to the low air pressure regardless of how many intakes you have. This material may not be published, broadcast, rewritten, or redistributed. My first test of the plane parts in KSP2.Like and Subscribe for more Kerbal stuffs!#kerbalspaceprogram #ksp2 #kerbalspaceprogram2 #shorts #spaceplane #nasa All the weight is pushed on the middle and it can't pull up. Set up for a long glide path, and watch rate of climb indicator at top of screen, aim for -5 m/s. EDIT: So, I set the front landing gear spring and damper to 0.5, and also set the tail gear spring and damper to 2, and the problem was fixed! https://wiki.kerbalspaceprogram.com/index.php?title=Tutorial:_Your_First_Plane&oldid=103052. This page was last edited on 14 April 2021, at 01:04. Take the large delta wings and place them on the aircraft. Your link has been automatically embedded. 3. angle of the wheels. To avoid swerving on takeoff and landing, it is strongly recommended to turn off or reduce the strength of the front brake on your aircraft, as well as to reduce the friction control. FOX 56 News Video More Videos All of them had one thing in common though. FAR says it would take an Angle of Attack of 24.3 degrees at 119 m/s to generate enough lift to get it to take off. First of all, since the launch happens horizontally, you will have to include landing gears, and you will most likely want to include jet engines for the first stage for excellent fuel and cost efficiency. Heavy Cargo Space Plane SSTO Download. - KSP - YouTube 0:00 / 31:25 Flying a Space Station through a GAS GIANT! LV-N exceeds 75% of its full power at just 7700m altitude on Kerbin. Rapiers generally provide less thrust than a Whiplash at speeds below mach 2, but provide more thrust at higher speeds. Note that the lift rating does not mean that the wings will automatically lift a spaceplane into the air when it's moving forward. This makes them a very effective choice for SSTOs since they do a good job of getting maximum velocity out of air-breathing mode, and then allow you to use oxidizer without needing the added weight and drag of a separate rocket engine. Note that canards are somewhat more efficient than horizontal tail fins since canards provide an upward force with upward rotation, and downward force with downward rotation. It is due to the spinning up of the engines. Though, I use the FAR mod which will change things, so I can't guarantee the results will be useful, but it might be interesting. If you're planning on landing on a somewhat uneven surface, like an open grassland somewhere on Kerbin or an island on Laythe, consider packing some parachutes for deceleration. I have also thought about a wider base. Necessary for heavy/long spaceplane. ), Stable aircraft: "Untitled" (lost the file upon loading after aircraft), Stable jet car: "Untitled" (Lost the file), Speed over land > 350 m/s before veering off the runway, Sometimes Stable Spaceplane: "Hypersonic Experimental". http://kerbalspaceprogram.com, Press J to jump to the feed. Landing is hard. Geometric shape of the body you attach the landing gear to. Nothing bad will happen. This is all right if their high efficiency saves enough fuel, but that may not be the case in small spaceplanes with limited fuel capacity. After externsive testing and bloodpressure rise, results: it doesnt matter where you place the wheels, as long as they are not angled on the X (nose-tail) axis. Second try, speed over land reached over 210 m/s and it didn't flip. http://www.youtube.com/user/Cruzanak?. Here, the. https://forum.kerbalspaceprogram.com/index.php?/topic/124380-wing-lift-amp-wing-lift-to-drag-ratio-charts/, https://wiki.kerbalspaceprogram.com/index.php?title=Tutorial:_Spaceplane_basics&oldid=100619. I started investigating why this was happening. S5 moon rocket by lightbreaker_64. As lift increases you remove some strain on the gear, however you've just increased the amount of sag. The tutorial below explains everything very well. . Pasted as rich text. An alternative is making sure you have complete control of the craft. One FL-T100 tank can't power any rocket into space, yet a Shock Cone Intake, a Mk1 Inline Cockpit, a half-filled FL-T100 and a J-X4 "Whiplash" Turbo Ramjet Engine aimed in the general direction of "up" will let you laugh your way past the 70km mark at nearly 1200m/s. However, I want to place my wheels where i want to and not only on X parallel surfaces. mods used are OPT for most of the body and the front canards and tail plane, B9 procedural wings for the wings, and mk4 . Now I'll walk you through a basic aircraft; fancy stuff like science equipment can be added later. Then you want to put something called a "Small Circular Intake" on the front of the tank, and a "J-20 Juno" engine on the back of the tank. This is also the same reason why planes start rolling toward the middle of the runway; because both ends of the runway are further from the center of Kerbin than the middle (because it's totally flat), the runway is a valley from a gravitational frame of reference. I had this one plane, very fast, It would go to 170 m/s on the runway then drop of the end and soar very nicely. All trademarks are property of their respective owners in the US and other countries. Be warned that if you do not provide sufficient air intakes for the engines you've placed, you may find that some of your engines shut down before others. That will align with the craft axis. I wanted to develop a plane to check how are the aerodynamics physics working, and went back to the KSC VAB to design a little plane. Privacy Policy. If your spaceplane is difficult to land when full of fuel but easy to land when empty, then it may be helpful to burn off or transfer out most of the excess fuel before landing to make the aircraft lighter. 2022 Take-Two Interactive Software, Inc. Managed to fix it with some different wings; idk what was going on with the other ones but I was just thr FAT aeroplane wings. I scoured the entire web for a solution, but found no working solution or at least dont work every time. You can deploy your chutes just prior to touchdown for rapid deceleration. And, of course, try to take off and land as slow as possible. Ideally, the wings should be tilted upward at an angle about 3-5 from the fuselage for optimal lift-to-drag ratio.[1]. To slow down faster, you can increase the braking strength of your rear wheels. So if I start encountering wobble it's time to pull back on the stick and get in the air. Safety note: Disable the brakes on the front landing gear. 2022 Take-Two Interactive Software, Inc. http://forum.kerbalspaceprogram.com/threads/99660-0-25-Adjustable-Landing-Gear-v1-0-4%28doors-fixed%29-Nov-14. Mechjeb Spaceplane Guidance. You need to make sure that the Orange axis on the rotate sphere is parallel to your, nose-tail axis. Espaol - Latinoamrica (Spanish - Latin America), http://forum.kerbalspaceprogram.com/threads/65638-Basic-Airplane-Space-Plane-Aero-Tutorial. If there is, I would have found it long ago. (Source). There are multiple ways to place them: Ailerons control the roll of the aircraft, and are (almost) always placed on the wings, as far out as possible and as centered (compared to the center of mass) as could be. LV-N "Nerv" nuclear thermal rockets are commonly used on SSTOs for the rocket stage if Rapiers are not used. At around . I just thought my planes were too heavy or not enough control surfaces. It doesn't really matter if you angle them or not, there is not a single configuration for the wheels that can work on all plane parts. There are several forces in Kerbal Space Program which have an effect on the flight characteristics of SSTO craft. Elevators are usually places in the front or back of an aircraft, and their function, as the name implies, is to change the pitch of the nose up and down. #2 DaSkippa Mar 14, 2014 @ 2:56am as Shkeec said check gear check gear check gear. In subsequent missions, you may want to launch with less fuel to cut down on cost and make landing a quicker and easier process.

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