So this guide is about atmospheric craft designed to fly by makinguse of lift generated by wings, which can take off and land vertically by use of downward-pointing jets or rockets. KSP should be handing out engineering degrees :). For what it's worth - watching 1.2 pre-release streams, the upcoming changes to SAS are profound. Which reverse polarity protection is better and why? Sparks will fit in Mk 1 utility bays, the bigger ones will fit in the bigger cargo bays (Mk 2, 2.5m utility bay, Mk 3). More air is better. 2 will usually do nicely, but 3 or 4 are usually better (but of course heavier, and this tutorial assumes you use 2). It is also said that a good landing is one you can walk away from. You can park a ship into an elliptical . Thank you for posting this. That's what this guide is all about, so we're not talking about VTOL rockets that don't make use of wings to produce lift. Privacy Policy. 1. 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. I have a simple Vtol SSTO that can take off with junos, hit LKO with rapiers, maybe with 100 m/s left on the rocket side, then return to spaceport and have sufficient liquid fuel for vertical landing. Valentina would really appreciate if I could get my airplane off the ground, but it keeps exploding on the runway by the exact same failure mode: The plane veers to one side or another, either I or SAS correct it, which starts a left/right wobble, which builds until one of the wings hits pavement, at which point the craft quickly brings Valentina to her untimely end. Before building planes though, there are some inportant things to know. 3. 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. Right click on the control surfaces and knock down the control authority of each item. Your previous content has been restored. Always look at your aircraft from a 90* angle on the side. Starting from something with MK3 hull without experience in MK1 will be an uphill battle. Except for the parts regarding drag and number of intakes, everything else is still very valid. Standard KSP airplane-stability request: post a screenshot of your airplane in the SPH, with the center-of-mass, center-of-lift, and center-of thrust markers shown. I was hoping that the new intakes would give it the added altitude. If his problem is the plane doing backflips at a touch of 's', I wouldn't go with 'slightly'. I wrote a post that covers similar topics. You want to keep the CoL slightly behind the CoM, but not too much to not create torque. As you reach 100m/s, hold S to pull the stick back, and you should be in the air! Then go into the move part thing with the "2" key in the editor, remove the degree setting, and then drag them apart manually and position parts with fine tuning that way. The CoL should be behind the CoM on a horizontal angle, unless you're building a shuttle. Junos, Panthers, and Wheesleys are all fairly efficient at low altitude and low speed - when you said 'guzzle' i screwed up my face because when I think guzzle I think rapiers and whiplash's putting out 300 kN and just gorging on fuel. @TheEnvironmentalist No clue, but it doesn't need to be much because it's a feedback loop. +1 for "If that all fails, you may try building your plane lighter and with mightier (or just more) engines, so it just doesn't have the time to start misbehaving on the runway before you bring it up in the air." Powered by Invision Community. Try not to make your first airplanes longer than 3 MK1 fuselages. @italian man Great guide, and for people who would like to know the basics of plane building i will be pointing them here. Things get ugly!!). ps. You might still be able to turn very quickly, but if you don't have enough wing you won't drag your velocity vector with you, which means you force your wings into a stall and bleed energy in a hurry (and can also lose control, depending). If additionally you can give it a controlled tilt and hold it there, then it'll start accelerating in that direction, like a helicopter. This item will only be visible in searches to you, your friends, and admins. Arqade is a question and answer site for passionate videogamers on all platforms. Can you check what happens if you swap in larger gear? and adust the springs according to how much weight thier carrying. Build yourself a plane. Now I have a plane that will fly around the world at an altitude of the low-20s. You would need to get down into the 37k-45k zone to aerobrake enough to come down in one orbit. as a rule of thumb they all lose thrust at higher altitudes and at high velocities. Now right click each elevon and the tail fin and set what movement each controls; the ones on the large wings control roll only, the ones on the back wings control pitch only, and the tail fin controls yaw only. This can be most helpful when transitioning to or from level flight. Upload or insert images from URL. It may be too far forward, especially if the tail is too small relative to the plane's wings. If you have an account, sign in now to post with your account. As you reach 100m/s, hold S to pull the stick back, and you should be in the air! Now, get a pair of winglets, and place them at the front of the plane to get that approximate spacing of COM . You cannot paste images directly. A slight "inwards" tilt on your wings (5 degrees or less) will improve stability hugely and will cause your plane to slowly correct itself in flight, also if you're using large control surfaces at high speeds then the result is obvious. The CoT (Center of Thrust) is purple. If you have an account, sign in now to post with your account. Turns out it was wheel positioning! If the fuel flows from the. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. For the CoM / CoL relationship to get a stable-yet-maneuverable craft, I'd recommend doing the tweaks in two stages. Similar to the fuel pump mods out there now. I actually like canard layouts, but I'm going to endorse this post because it's a simple, easy way to do it. To start off with, use ANY cockpit you want, this tutorial is going to teach you how to make anything using anything, as long as you follow these directions. Start with simplest, easiest planes you can and then increase complexity observing and mitigating problems as they arise. The more intakes added, the higher a plane can go before a flame-out, which makes multiple intakes a must on SSTO spaceplanes. 2) Then add the pitch control surfaces. Please help, This is an okay guide but it does not go into the nuts and bolts of the deal.like what exactly do all of these wing parts do? Hi all so I accepted a contract to do temp scans on Kerbin and guessed a plane was the right way to do it so I made this. Congratulations! As crazy as this sounds, it's true, they really get helped out, and it's a really nice thing to do. This happens in two instances; initial placement and plane body deformation. The gear of the craft can also easily be overlooked, but can make the difference between flying masterpiece and soon-to-be-scraps. Your airspeed will also fall. 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. Or about the same speed but 1000 m higher. Paste as plain text instead, They're obviously bigger and less efficient than conventional landers again because of the extra engines you're hauling; the advantage is being able to land them exactly where you want, while having the capability to explore the planet with atmospheric flight. First off, make whatever you want, just, start off making sense. So if you're getting those flame-outs, add more intakes until you don't get them anymore. Hint:The engine pre-cooler and engine nacelle are fantastic air intakes, and they can be mounted in-line or combined with other elements. Another pointer is to make your wings larger with the same amount of control surface. Can you check what happens if you increase the tail size to pull the center of drag back? In particular, there's one constraint that needs special attention: centre of mass, and the invariance thereof, as you burn fuel. What is this brick with a round back and a stud on the side used for? Plane body deformations can cause the wheels to touch the ground at a slightly different angle. If you have more than one engine, you can get asymmetric thrust at low speeds. (as in, like 45 degrees) usually resulting in the plane exploding. Eventually you either crash, or you reach a high enough speed that SAS wiggling can't cause a significant enough difference in engine speeds. This reduces the amount of trim you need to apply to get the craft level in flight. Then: I hope you've found this short tutorial useful. When braking most of the power should be on the rear, or you may see Kerbin up close. zombie2u, Body deformation can be caused by heavy parts, many parts connected together, or forces on the plane. 5. I've had a lot of people comment that their planes veer off the runway or flip around madly even though they think they got everything right. The CoM (Center of Mass) is a yellow ball on your spacecraft when you enable it in the SPH. The BAK Drakula. Build yourself a plane. Thanks for any answers! This is my current best hi alt plane. If the fuel flows from the. Now for the engines. I moved the wheels from the tail to the fuel fuselage, and now she takes off like a dream! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. A Mk1 Cockpit, two Mk 1 Liquid Fuel Tanks, and then cap the back with a round nose cone (use the A/D keys to rotate it as necessary). Cookie Notice Connect and share knowledge within a single location that is structured and easy to search. So, if you're having this problem then. Have you set your control surfaces to only respond to appropriate controls? You can also use fine controls with the Caps key, or change control surface sensitivity and assigned movements. Learn more about Stack Overflow the company, and our products. This guide also applies to STOL (Short Take-Off and Landing) aircraft which do their thing using downward-pointing jets or rockets, because they're pretty much the same thing. This item will only be visible to you, admins, and anyone marked as a creator. I didn't try for 20000m as it probably wouldn't do well. Aircraft are surprisingly difficult beasts to build and control, building a stable, flyable aircraft is surprising complicated, so this is the first of a num. The writing is a bit disjointed, because it's been edited and restructured a few times andI'm not a native english speaker. The CoL should be in the center or just behind the CoM. But mostly, the answer is still "because they're fun and educational and you can.". Also, I would like to know how I can tweak my aircraft to make them smooth at the controls. First, @TheEnvironmentalist There is one more method I'm sure would work in your case, although I didn't write about it because I think it's, Hahaha absolutely right, but distinctly less satisfying. - but they were talking about having two intakes/engine. Take the large delta wings and place them on the aircraft. It can be as crazy or as normal as you want, just remember these basic tips, 1. Hovering is expensive but you don't really need all that many seconds of hover either for take-off or for landing. Cookie Notice Move them back and fill them with fuel or weigh them down with control surfaces. About the landing gear, the best way to stop the weird self steering issue is to increase the spring and damper strength. Thanks to this guide I did my first ever landing on the VAB helipad! Of course the cargo capacity is less than with a HTOL since you're using some of it to haul those vertical thrusters. You're one of the few I've read that recognized the potential of Junos in vtol vs the more popular panthers or using rotating clamp-o-tron assemblies- bigger engines have the huge design downside of shifting COM above fuselage longitudinal axis, which makes rocket placement difficult for SSTOs. hope you and others find that useful in the future! It is certainly possible to make VTOLs that can circumnavigate the planet. I have made a couple VTOLs in the pastand had a lot of fun with both the engineering and flight challenges. A Screenshot of Kerbal Space Program. Sorry if this is just too basic, it is kind of for beginners, edit: [snipped the stupid thought] i need to stop trying to post when dead tired, I like rules of thumb like these All the info you need without getting bogged down with specifics, Just a quick FYI, you say that CoL is center of thrust and CoT is center of lift; these are the wrong way around. I might try to write a more advanced guide for spaceplane construction. The juno 8-pack in a mk2 bay is my go-to, plus, a single Engine nacelle will provide enough air for them all and fuel is self-contained, making the design easy to scale for larger craft. Now I'll walk you through a basic aircraft; fancy stuff like science equipment can be added later. You may be correct and that 3 engine plane is a lemon. You arent doing anything wrong. But it flies horribly, it's all over the place even with SAS on it doesn't fly even remotely stable. In vanilla KSP, wings have a predefined lift factor. Also, excessive use of the rudder usually causes the plane to spin out of control and crash. But it should most definitely be in front of it, and preferably NEVER move behind it, even with empty fuel tanks. Privacy Policy. Rasterpropmonitor for Kerbal Space Program, How can I cheat docking in Kerbal Space Program. The Panther engine can hold 19,000 steady and oscillates around 20,000. The BAK Cyclone, delivering a station module to Duna. To do this, take a few barrels of your jet fuel, stick them on the back of your aircraft. Your previous content has been restored. One of the most finicky problems with VTOL craft is managing centre of mass. Is there any way to reliably fix this? Espaol - Latinoamrica (Spanish - Latin America). Embedded hyperlinks in a thesis or research paper. At low speeds, this difference can be significant. Light craft have a single engine at the rear of the fuselage. Drive gently off the runway and use the huge grassy field to take off, without care in the world about the plane veering to a side. I'm going to strongly suggest using the angle set to 90 degrees + symmetry mode to place landing gears. [1] At this speed it is possible to circumnavigate Kerbin in about 29 minutes at an altitude of 40 km. So thanks for the pointers - I'll take a look (and try to cure my prejudice re canards). Then I'd go with moving it towards more maneuvrable by moving CoL towards CoM. How do I build a good stable basic plane? I've been playing around with aircraft over the past couple days, only to find that no matter how low I set the pitch authority, they tumble and crash at the slightest hold of the "S" key. Ok, the panther engine is still not good enough. So yes, it most definitely is possible. You should talk about the rocket engine's dV (approx., since not all users use Mechjeb or any other mod capable of showing dV for a given engine and tank). (The spacing of COM and COL in your second picture is about right.) Your link has been automatically embedded. Powered by Invision Community. Always look at your aircraft from a 90* angle on the side. This page was last edited on 19 February 2020, at 07:08. Adding a vertical intake helps. There are a few missions for which a VTOL aircraft is ideal. Archived post. Best way to get down into thicker air and land is to perform what dogfighters called a 'Split-S'. Jets are good for a certain amount of static thrust but they don't allow quick control of your vertical speed because of their slow spool time. i dont know what kind of range youre looking for but i would make a significantly smaller plane. Valve Corporation. You too!Like - Subscribe - Check out my other tutorials. NEVER go forwards, causing the aircraft to crash itself. http://kerbalspaceprogram.com. I used the angle snapping feature (to the right of the symmetry selector in the bottom left hand corner of the screen in the space plane hangar view) to mount the steerable wheel perpendicular to the ground, and the two fixed wheels symmetrically such that zoomed in, the wheels themselves are perpendicular, though the fixed wheel part itself comes with something like a 45 degree angle between the wheel and the shaft that attaches it to the craft, so the shafts naturally sit at something like a 45 degree angle out to either side so the wheels can sit perpendicular. Also as others have pointed out, keeping the COM/COL/COT alignments proper is essential for aircraft. 4. Because of that if you for example place control surfaces at the front you can make a plane that has CoL behind CoM (like in the picture) unstable because CoL will drift forward past CoM as AoA increases (contrary to your 4th point). The parts regarding landing gear placement is especially relevant in 1.1.x. All trademarks are property of their respective owners in the US and other countries. 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. Also, make sure you read this slowly, some of this stuff may be confusing, but, if you read carefully, I will help you out with what everything means. Paint a picture in that little head of yours, imagine that the Mass was in the back, when you stall it, it will ALWAYS fall backwards and. the front should be close to double the rear gears strength) And Good Guide! Use Pilot Assistant - it's SAS is meant for aircraft rather than general ( read: rocket ) use. And there's the ever awesome 101 from @keptin. Now stick a jet engine on the back, and don't forget to put an air intake or other air-sucking device (you can find them in aerodynamics) on the airplane. The longest flight got them down to a little more than half full. Control surfaces near center of mass sometimes get "confused" as to their role and do stupid things. They sometimes coincide with ailerons on some, more space-economical, aircraft. They optimize use of oxidizer in SSTOs. The two engines have been mounted every imaginable way with the same result: Over the wings, on the fuselage, on girder segments, on the wingtips, etc. We still don't know what his craft even looks like yet For all we know it could be a single SRB with canards at the front. It is entirely powered by Terriers. That is something I am really looking forward to. Wheels need to be touching the ground exactly as they were intended to, you cannot angle them in any direction other then their intended direction when placing them. How to force Unity Editor/TestRunner to run at full speed when in background? It uses six Mk 1 utility bay-mounted Junos for hovering. @gokcet @DANKTER I usually run my front wheel override friction on 0.3 when the front gear has steering disabled, it needs lower friction. We look at the principles behind designing a basic jet. one last thing to verify: look from the side, observe where your center of mass is, then how the control surfaces are located relative to it and if the way they react to your controls makes sense (just try to pull up, down, or roll, on the runway without even starting the engine or disengaging brakes and watch which way the control surfaces move). You can horse hundreds of tonnes, up and down both, with the standard canard pieces. I would really suggest this guide for beginners trying to get into the world of planes in Kerbal Space Program. On the other hand, something with a wide wingspan but narrow wings (like the connector Cs) will pitch easily but need more oomph to roll. With a decent lever arm to work with you can be both perfectly stable in level flight and very agile in pitch and yaw controls. Please see the. and our What Trump's very stable geniuses lack in intelligence they more than make up for in confidence. Why don't we use the 7805 for car phone chargers? It is only visible to you. 4. Would I be better unlocking more parts and leaving this contract for later? It is usually placed back because it can be placed further back than it is possible in the front (if it is placed in the front, it can obstruct the view of the pilot, which is undesired) as well as making the plane unstable (by the same effect that you would get if the center of lift (horizontal lifting surfaces) were in front of the center of mass, but with vertical surfaces). Now for wings, the "Wing Connector Type B" is the largest you have so far; connect a set of those where the centre of mass is. I've been having some trouble lately in newer with respect to air flow. New comments cannot be posted and votes cannot be cast. Kerbal Space Program, how do you disable autosave? Once you got a hang of these, try bigger stuff. Whether VTOL craft arepracticalor efficientcompared to other solutions is a different matter -- and to be perfectly honest, I'm inclined to think not really. I had my rear wheels mounted on the tail, and it seems the taper of the tail messed up the angle of the wheels creating instability. The BAK Zephyr, a rocket-powered VTOL craft designed for conducting science missions on Duna. there aren't any aerodynamics when you are a kraken scientist like me. Imagine that first plane but with the bubble cockpit and the old style round intakes. Their hoverjets just have a TWR of less than 1.0. The hoverjets are housed in the big wing-mounted pods. And one other, more remote possibility to check: Where is your plane's center of drag? Aim to get your speed below 50m/s, and have plenty of water ahead of you; keep the plane level, and pitch up to shed velocity. If the CoM is in the back, then it will ALWAYS not be able to get out of a stall, flatspin all the time, and will be an all around horrible plane. Note: Your post will require moderator approval before it will be visible. on the same axis as engines. the vertical stabilizer only handles yaw? SAS sees this and turns the other way, which just causes the same problem in the other direction. I've spent the past three hours committing a genocide of historical proportions against my Kerbals, and it's making me quite sad. by fixing the suspension issues the need to sacrifice traction, and in turn, braking power, is not needed. We're also not discussing helicopters here, because stock kerbals have not invented the propeller, and stock propellers are a whole big topic of their own. It also depends on whether you're using FAR or another aerodynamic rewrite mod that would change the way your aircraft behave.

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