Sustained flight at over 20km requires at a minimum the Panther in Afterburning mode. : : . 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. If too much air runs into the turbine, the excessive amount just flows out unused through side-vents (I think). Anyway thanks in advance. 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. Pvt. First is thrust; the higher you get, the lower the thrust your engines deliver. My 'plane science' is more advanced than my 'rocket science' (career mode) because I got tired of seeing all the high-altitude missions I had on the books and wanted to finish them. Paste as plain text instead, How do I align things in the following tabular environment? To reach the initial low Earth orbit of the International Space Stationof 300 km (now 400 km), the delta-v is over six times higher, about 9.4 km/s. It is boosted into space by a launch vehicle, then re-enters Earth's atmosphere and lands as a spaceplane. Highest and fastest possible is best. principle. You can post now and register later. The Rapier, for example, works great as a high-altitude engine, precisely because it can go so fast. @SaintWacko's advice is probably the most practical. Clear editor. - "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. 2022 Take-Two Interactive Software, Inc. (the engines will use very little at high altitude anyway). 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. As long as the engine gets enough air it will work at proper efficiency. The J-404 "Panther" Afterburning Turbofan is a jet engine added in version 1.0.5. If it's below the cross-hairs, you need a little more AoA. Something that I think has become less clear since someone updated the wiki. I don't have that cockpit in my career game yet, but maybe it will work with the other one. The stratospheric region, where temperature rises as altitude increases, spans the region between the altitudes of 10 km and 22 km. Along with rockets, planes are one of KSP's most commonly referenced kinds of vessel, and are a vessel type . Yes, you can get into that range with the high end stuff (whiplash engines and ram or shock cone air intakes). Air Intake) and how fast your aircraft ultimately flies (air resistance/altitude)! Evidence. Pretty often, the tail "wiggled" and/or the plane became totally unstable when I fired the rocket boosters. Now I have a plane that will fly around the world at an altitude of the low-20s. I didn't succeed with his design, though; I always ended up having somehow unstable airplanes. Put a couple of radial mount parachutes just above the com and add a reaction wheel. Check out the website and try the game out for yourself :Dhttps://kerbalspaceprogram.com/ It seems to be based on the General Electric F-404 Afterburning Turbofan, which shares the same name and maximum thrust (85 kN dry). What you should be concerned about is atmospheric drag, and that's minimized by high-altitude flight. As said above, the Wheesley is specifically designed as a low altitude engine. Its an approximation missing someelements. 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 In KSP2, you are a rocket scientist who must build and test rockets, spaceships, and planes. 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. 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. One of my planes is small and agile, and can easily enough glide to a safe landing even if the rockets consume all the fuel. 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. The Panther engine can hold 19,000 steady and oscillates around 20,000. Why do small African island nations perform better than African continental nations, considering democracy and human development? As long a you can fly faster, the lower density at altitude can be compensated for. Personally, I don't enjoy survey contracts on Kerbin. The flight time won't be as long, but you'll be able to fly a "plane" above 18km. If you enter the Mun's SOI, it immediately counts as "In Space High over Mun" until you get below 60km Mun altitude. In the game, players direct a nascent space program, staffed and crewed by green humanoid aliens known as "Kerbals". Hello there. 3x06: I design a new, high altitude, jet to collect high atmospheric science. - Insane TWR didn't help. How to tell which packages are held back due to phased updates. Thanks for asking this, I've been struggling with the same problem in career mode. Note that keeping the plane weight low is critical, only carry a very small amount of fuel. Which is capable of high altitude, high speed flight. So, to correct " is below crosshairs", what you need to do is to add a little AoA to the wings. You can spin around the whole world on just fumes. This thread is quite old. 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. What's the difference between a power rail and a signal line? 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. Pasted as rich text. I also set it to enable the cockpit's reaction wheels to improve control at high altitude, and close air intakes to reduce drag. A well-designed jet with this engine and with the afterburner lit, flown properly, can momentarily climb to 30,000 m altitude. From my observations I can say that "Efficiency" is not a good indicator of how well your engine performs. When I say ", You know you've nailed it correctly if, when you're in level flight, your. Then it is "In Space Low over Mun.". The drag differential is because your long-wing layout is using a bunch of struts, and the reason your delta-wing has a higher ceiling is because it has more wing area to provide lift. As has been said, ISP is nothing to worry about. Very cool. Immediately starting rocket engines at full throttle turned out to make most of my aircrafts totally unstable, turning them up gradually worked way better. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Even up there the plane acts squirrely. The X-37 is operated by the United States Space Force for orbital spaceflight missions intended to demonstrate reusable space technologies. Designing a High Altitude Jet | KSP: Making Space Home Mike Aben 24.8K subscribers Join Subscribe 85 Share 3.4K views 1 year ago Ep. The high performance engine for me performs pretty good till about 15000 meter. I was hoping that the new intakes would give it the added altitude. 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. Even if the air is thin, you can still put out plenty of power if you are shoving enough in with raw speed. But a rockets can do it. You can go above 20km with the J-404 Panther. 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. All trademarks are property of their respective owners in the US and other countries. Imagine that first plane but with the bubble cockpit and the old style round intakes. Hopefully this will be helpful to you. KSP doesn't care (much) about aspect ratio; the total lift is the same regardless of configuration. From my experience using a panther it starts to lose speed after 15-16 kms, a more suitable cruising height is 9-13km. They always seem to lose power at about 15km, but I'm wondering if there's something I can do to fix that. Main goals: Auto-trimming. Simply changing the intakes made it fly completely out of control and impossible to land. I should perhaps start trying out NEAR to get ready of 0.90, though. Due to the lower air pressure at higher altitudes its thrust output decreases accordingly. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Challenges If that's all a case of Too Many Words, think of it this way: Suppose you just build a plane the "default" way and don't put any. 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. AoA and G-force moderation. 1.) Powered by Invision Community. 2022 Take-Two Interactive Software, Inc. Unfortunately, there's no simple rule to tell you what the angle needs to be when you're building the plane-- it depends on lots of variables, such as your weight, drag, intended cruising altitude, intended cruising speed. I've been finding it difficult to build a jet that can fly over 15km alt. Best way to get down into thicker air and land is to perform what dogfighters called a 'Split-S'. 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?). How can I make money in the new career mode? You are just about at maximum speed and at the same time very close to stall speed. Press question mark to learn the rest of the keyboard shortcuts. You get tons of thrust if you put it into "wet" mode, but you lose fuel efficiency. probably the easiest place to land in the system as terminal velocity is survivable for a craft less kerman. AoA itself refers to the angle of the wing (or the whole plane if the AoI is 0)relative to the airflow. Learn more about Stack Overflow the company, and our products. Note that you need to activate the afterburner ("Wet Mode") manually. Why do many companies reject expired SSL certificates as bugs in bug bounties? Valve Corporation. 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. If the wings are flat and your plane steadily loses altitude in level flight at a given speed (as most designs will by default), it means you either need to pitch up slightly, increasing the angle of attack and keeping your vertical velocity at 0 by flying up slightly to compensate for the pull of gravity that lift isn't compensating for. Clear editor. as a rule of thumb they all lose thrust at higher altitudes and at high velocities. Display as a link instead, If your using NEAR/FAR, once you get high and fast, kill the engine and glide to save fuel. 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. At 3500m, you have half the drag you'd have at the surface; at 7km, 1/4 the drag, at 10.5km, 1/8 the drag, etc. Delta wings are able to work better since the lack of lift per square area is compensated by having larger area to provide lift. Can't remember where I saw/read about it - Scott Manley maybe? It only takes a minute to sign up. with a thrust vectoring range of only 3 degrees. You need to do it with what you've got. Any of my search term words; All of my search term words; Find results in. That annoys me but I can't seem to get a design to make it work. 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. Any advices for building a vehicle for this task? http://kerbalspaceprogram.com, Press J to jump to the feed. 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.
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