After a successful touchdown, high-speed motion on the runway (let alone uneven ground) can be unstable, causing the aircraft to careen to one side or the other, potentially resulting in loss of a wing and sometimes the entire aircraft. Please consider starting a new thread rather than reviving this one. here are some images and a gif. Your aircraft might just be too heavy - there might not be enough wing lift for it to take off the ground. KSP handling death investigation High Winds Cause Widespread Power Outages Ohio . Tell ya what, I'm gonna try to recreate that thing in my sandbox and see what I get. And, of course, try to take off and land as slow as possible. You cannot paste images directly. 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. But regardless of that, try very hard to let the plane fly itself off the ground without you applying any controls. Slowly pitch up to avoid overheating. Notice how the landing gears are placed out on the wings. The reverse also happens. . You're going to have a bad time. It is also advisable to add some control surfaces to your plane to have some control in the atmosphere: you can manually add them to the wings or choose winglets with effective control surfaces, like the Standard Canard. Valve Corporation. For all your gaming related, space exploration needs. Edit: I made a simple easy plane in career mode that is both stable and cheap: A trick i've used before is to put modular girders on the sides of the fuselage and putting the gear on the bottom of the girders. My plane tends to wobble on the runway with the stock game so i decided to download FAR, but the problem still persists. http://www.youtube.com/user/Cruzanak?. Throttle up to full, activate SAS, stage to start the engine (you'll only have one stage here), and start rolling (or sliding) down the runway! Keep your spaceplane pointed about 90 degrees above prograde so that the wings and body of your aircraft slow you down as much as possible. Cookie Notice Note: This is ONLY to be used to report spam, advertising, and problematic (harassment, fighting, or rude) posts. There are several forces in Kerbal Space Program which have an effect on the flight characteristics of SSTO craft. Control surfaces are heavier than wings. It is due to the spinning up of the engines. As lift increases you remove some strain on the gear, however you've just increased the amount of sag. LV-N exceeds 75% of its full power at just 7700m altitude on Kerbin. All trademarks are property of their respective owners in the US and other countries. Increasing the number of intakes will not allow you to continue using your jet engines at higher altitudes. Saves a lot of headache in wheels placement. So the answer is: in the SPH, click on your front gear, set the spring to .5 and set the damper to .5 -- then save it and give it another shot at launching. Yours is a very light plane, and the standard suspension settings are for a medium heavy plane -- so your suspension is too stiff. This material may not be published, broadcast, rewritten, or redistributed. 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. Here is an example of landing gear place on a complex geometric surface: Unstable plane Rear landing gears only seems to work on cylindrical fuselage, if you place them on a fuselage intake or anything other than a cylinder, the wheels can behave strangely. Take the large delta wings and place them on the aircraft. I believe the issue is there is not enough control surfaces to offset this issue, but it comes up very easy so it is not a very big deal. They are able to operate at higher altitudes and can even continue operating in a vacuum by switching to a rocket mode. Safety note: Disable the brakes on the front landing gear. Suggest a Correction Copyright 2023 Nexstar Media Inc. All rights reserved. Firstly you're going to want to make a short fuselage. 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. Firstly, inadequate air intakes for the number and type of engines you're using (causing some engines to shut down before others). I do add a strut to each wheel out of habit since my earlier versions use to roll, better safe than sorry. But I am still not sure if there are more reasons or perhaps it is just a physics bug which I am wasting my time on. Espaol - Latinoamrica (Spanish - Latin America), http://steamcommunity.com/sharedfiles/filedetails/?id=484107795, http://steamcommunity.com/sharedfiles/filedetails/?id=484107807, http://steamcommunity.com/sharedfiles/filedetails/?id=484107735, http://steamcommunity.com/sharedfiles/filedetails/?id=484107761, http://steamcommunity.com/sharedfiles/filedetails/?id=484119427, http://forum.kerbalspaceprogram.com/threads/52080-Basic-Aircraft-Design-Explained-Simply-With-Pictures, http://steamcommunity.com/sharedfiles/filedetails/?id=484137556, http://images.akamai.steamusercontent.com/ugc/443953434412162923/42B3BB54A6A524CCC2E5C102AD88C8E521790F55/. I am accelerating it to over 200m/s on the runway just to test the stability of those wheels since the faster you go, the more likely the plane will wobble and flip on the runway. Powered by Invision Community. Mods needed for this aircraft to work: Procedural wings, Adjustable Landing Gear, FAR. Do agree that the rear wheels either need to be brought closer or or the Nenter of mass needs to be move closer to the rear wheels. Flying a Space Station through a GAS GIANT! Why is it doing this? All of these problems can be exacerbated or reduced by adjusting the amount of fuel in your tanks during landing. The tutorial below explains everything very well. Try not to place your gears to wings, especially wingtips - if they wobble even slightly, your plane lose the balance. Create an account to follow your favorite communities and start taking part in conversations. The Kerbal Space Program subreddit. (Sorry For Poor Image Quality) : r/KerbalAcademy 385 votes, 49 comments. As long as you're in space, your spaceplane won't differ from any spacecraft: you will probably want to add batteries and generators to prevent the command pod from running out of power. symmetry building makes them face slightly towards (or away from) each other, with wobbly results. You could do it the kerbal way by attaching two SRBs to the nose of the plane pointing upwards. Rapiers generally provide less thrust than a Whiplash at speeds below mach 2, but provide more thrust at higher speeds. I feel tat it is either due to the symmetry placement in this game being inaccurate or certain parts where i anchor my landing gears on are not perfectly symmetrical and the physics calculation is just too sensitive about even the slightest misalignment. It provides a wider, more stable wheel base while keeping the wheels straight up and down (no camber). 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. 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. my planes keep flipping backwards on take off . In vanilla KSP, wings have a predefined lift factor. I worked through the tutorials and I think my problem was most often a lack of lift, or perhaps more accurately sufficient control surfaces. You want to get up to get the gear tucked away and reduce drag. As you approach 35-50 km, your aircraft will most likely level itself out, at which point you can try aiming about five degrees above the horizon line. KSC's runway is slightly north of Kerbin's equator and perfectly flat. Canards and horizontal tail fins should be placed as far towards the front and back of your aircraft as possible, respectively. You probably won't have much luck landing the fuselage intact if your Mk3 plane gets its wings scorched off on reentry. All you need to do is add landing gear (one right before the cockpit, and two on the tips or middle of the wings), and you're done! Valve Corporation. I dunno why but this picture makes the one side look like it is tipped in but I know they are straight, I believe it just the angle that the picture was taken that is causing it to look like this. (Yes, you personally, you lucky thing! Pasted as rich text. Also, lift is usually placed in the middle-to-back of the wing, depending on the shape. 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. How wide is the base. This page was last edited on 19 February 2020, at 07:08. For example, having your landing gears located near the ends of the wings is an easy way to ensure that you don't roll and shred your wings when landing or taking off. 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. So you want to make a plane but all your contraptions explode on the runway, crash into the runway a few seconds after taking off, crash into the side of the runway, crash into the ocean after doing a tight turn or otherwise fail to do what you intended? - Make sure the landing gear is as close to the center of gravity as possible, just slightly behind it (for nosewheel aircraft). I made a KSP replica of the Horten Ho 229 while trying to make a short takeoff plane.If you have any questions or suggestions, let me know in the comments.My. Note that dropping off cargo from the back with a Mk3 Cargo Ramp is bad for more than one reason. 32.5K Downloads Updated Dec 11, 2014 Created Dec 11, 2014. "Type E" is the smallest you should have, and you want a set of those connected at the back of the fuselage. When I Start Why Engine, It Goes Straight But As Soon As I Takeoff. 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. Make sure that all of your landing gears are pointing in exactly the same direction. This page was last edited on 14 April 2021, at 01:04. . Install S5 moon rocket By lightbreaker_64. Hot ground causes air to rise, cooling as it moves away from the heat, which leads to increased density and a resulting fall back down. As you would expect, spaceplanes need wings: they have various shapes and dimensions, and they differ basically in lift rating: you will want to have enough lift to keep your fuselage approximately prograde during your ascent to orbit. I was wrong. Easier just to bring the rear wheels closer as well as a in line reacton wheel. Beyond that, you're going to get some wobble once you get close to take off speed. Note that the lift rating does not mean that the wings will automatically lift a spaceplane into the air when it's moving forward. 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. All the weight is pushed on the middle and it can't pull up. After placing wheels I always use the rotate gizmo on snap with absolute orientation. Keep your nose pointed prograde as you descend through the atmosphere. I've had stability issues in planes where I'd have proper gear setup, balanced weight and lift. However, it's not a matter of "atmosphere or not", just a matter of air pressure which decreases rapidly with altitude. One idea I haven't noticed here yet: "wire up" the landing gear, with strut connectors. Paste as plain text instead, EDIT: It was the b9 procedural wings. everytime i make a powered plane, it always flips over and points backwards after i take off. Cure: Draw a mental axis from the nose to the tail of the plane and use the rotate tool (summetry on), on one of the wheels. The problem could be due to several issues. An altitude set to 18,000 meters tops off at 19,000 meters and drops to 15,700 meters . What you ought to be using is the Swept Wings and Elevon 1s instead of the Delta-Deluxe Winglets. Be aware that while this angle will provide the lowest possible landing speed for your spaceplane, it will create problems if your center of gravity is too far ahead of your rear landing gears (causing a high-speed nose collision on touchdown) or if your rear landing gears are too far ahead of your engines, causing them to strike the runway first. So I have played the game for 200 hours and I love it. With initial passes, you start off with a periapsis at 50-60 km and gradually lower your apoapsis until you're in an almost circularized low orbit and then transition to your usual re-entry approach. 2. 5.whether the body you anchor the landing gears to are firm. Here is the best aircraft I have created to date: Jet Aircraft. A Ravenspear Mk3 taking off from the Runway in version 1.0.5. They all had to use the runway drop to take off. Go on, and take the plane capsule which looks like a converted fuel storage device Contents 1 Making a fuselage 2 Understanding Lift 3 Control Surfaces 3.1 Elevator 3.2 Aileron 3.3 Rudder 4 Landing gear Making a fuselage Any plane needs speed - so you need thrust (usually). This allows you to takeoff at lower speeds and on shorter runways, and likewise for landing. Powered by Invision Community. Note: This tutorial was last updated for version 1.7.2. This plane will be able to take off, travel somewhere, perform a crew report, and then land. Clear editor. 4. 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). * Gear not mounted to parts that will flex (e.g. When landing, you can achieve the highest lift for a given speed by raising the total angle of attack of your wings to 30 degrees (although this induces a great deal of drag). For myself, it always was the position of landing gear in terms of pitch. 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 . Be aware that landing on water is an option if your spaceplane can fly level at less than ~40-50 m/s. Keep in mind that lift rating and control surfaces are not connected: lift rating is basically the capacity of your wings to sustain the weight of your spaceplane, while control surfaces are parts of wing that can be moved to change the flow of the air around the plane and through this change a plane's direction, angle of attack or inclination. I have doubled the max stress value for aerodynamics failure in FAR for every category. 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! I have built lots of spaceplanes. Secondly, it would suggest that your spaceplane's center of lift is too far forward compared to its center of gravity (causing the uncontrollable spin). 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. I have done everything imaginable to try to remedy this problem. Privacy Policy. It is also common to add an Inline Clamp-O-Tron, which, unlike all the other docking ports, can be placed in the middle of the spacecraft (a handy solution, since there is not much space at either end of the craft) to allow your plane to dock with space stations or other spacecrafts. Tips aplenty in this thread: http://kerbalspaceprogram.com/forum/showthread.php/13851-The-woes-of-building-a-space-plane?highlight=woes+spaceplane It taught me everything I know, except for the stuff I learned elsewhere. Upload or insert images from URL. 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. A relatively low-drag alternative is to use an inverted cargo bay and some hydraulic cylinders with structural panels as a cargo elevator. Display as a link instead, This thread is quite old. I thought after buying this I would have all the parts I need to build a small plane that can at least get off the ground, but I'm having trouble. That said, parachutes are an exceedingly effective means of reducing your stopping distance. When flying straight the plane is pretty stable but pitching up causes a sharp roll and I cant figure out why. Plane wobble during takeoff - KSP1 Gameplay Questions and Tutorials - Kerbal Space Program Forums Is there a way to place landing gear so that i can guarantee my plane can remain stable on the runway even at high speed in excess of 200m/s? Necessary for heavy/long spaceplane. All lift-rating means is that the wing section will resist motion perpendicular to its plane. For an example, see the A-10 Warthog's landing gears: link. Wow, if you need 200 m\s to take off, you should think about adding more lift. After that, you face the challenge of touching down on the ground and coming to a stop safely without rolling and breaking off a wing or taking a nosedive and blowing your aircraft up on touchdown, or rolling off of the runway and into the ocean. 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), which hinders the plane taking off. I found biggest cause of this as well as not being able to possibly correct is having sas on during takeoff, make sure that is off during take off and should find problem is less likely to occur, but I too struggle to make working space planes even when center of lift, mass, thrust are all as needed. An alternative is making sure you have complete control of the craft. Heavy transport seaplane inspired to the Soviet Beriev A-40 Albatros which also appears in Evangelion 2.0! Here is your convenient solution to this problem! I have never successfully landed a single aircraft before as they all tend to roll over when landing at high speed. Note that when your jet engines shut down simultaneously while climbing in otherwise normal flight, it is generally due to a lack of pressure from the altitude you're flying at. Thanks for all the help. - Make sure you have enough control authority to lift the nose up. If you have an account, sign in now to post with your account. This aircraft handles smoothly, no matter how you turn, roll and flip this aircraft, it will never lose control. (Source). Real planes do this as well. if mounted on not struted part). 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.