ARS

Well, that's according what the technician says, dunno if they exaggerated it or not, but the craft certainly increases in length when travelling at high speed

The JP-7 fuel for SR-71 is an exotic fuel which is also doubles as coolant. When SR-71 travels at high speed, the body heats up (So much that according to the pilot's experience, they heat their rations by sticking it on the window) that the airframe is increased in length by one meter. JP-7 is pumped and circulated across the airframe to act as a coolant. JP-7 is a compound mixture composed primarily of hydrocarbons; including alkanes, cycloalkanes, alkylbenzenes, indanes/tetralins, and naphthalenes; with addition of fluorocarbons to increase its lubricant properties, an oxidizing agent to make it burn more efficiently, and a caesium-containing compound known as A-50, which is to aid in disguising the radar and infrared signatures of the exhaust plume. The SR-71 Blackbirds used approximately 36,000–44,000 pounds (16,000–20,000 kg) of fuel per hour of flight. JP-7 is unusual, in that it is not a conventional distillate fuel, but is created from special blending stocks in order to have very low (<3%) concentration of highly volatile components like benzene or toluene, and almost no sulfur, oxygen, and nitrogen impurities. It has a low vapor pressure, and high thermal oxidation stability. The fuel must operate across a wide range of temperatures: from near freezing at high altitude, to the high temperatures of the airframe and engine parts that are being cooled by it at high speed. Its volatility must be low enough to make it flash-resistant at these high temperatures. The very low volatility, and relative unwillingness of JP-7 to be ignited, required triethylborane (TEB) to be injected into the engine in order to initiate combustion, and allow afterburner operation in flight. The SR-71 had a limited capacity for TEB, and therefore had a limited number of available 'shots' of TEB (usually 16) for re-starts, and those had to be managed carefully on long-duration flights with multiple stages of relatively low-altitude air refueling and normal high-altitude cruise flight. It's not just the fuel cost that ends the SR-71 service, but the difficulty in manufacturing the fuel, and the advent of reconnaisance satellite rendered the spy plane concept obsolete

By spinning the blades, it sucks the air into compression chamber, where the volume of air entering the chamber is higher than the air exiting the chamber, thus increasing the air pressure. The layers of turbine ensures that the airspeed entering the chamber is high enough to prevent pressure drop

I have a concept of "quite realistic" space battle. It accounts the orbital mechanic (one thing that's almost always neglected in space war stories) -The battle is conducted by ships, assembled in fleet formation and contain minimal human crew, with much of the system being automated. Weapons would be consisted of missiles and lasers. I choose both of them because missiles can correct it's trajectory (making it homing weapon) and lasers because it heats the target, which is hard to dissipate in space (essentially direct line of sight weapon), large caliber projectile based weapon would be rather uneconomical to transport to space in large quantity unless space travel becomes so cheap in the first place, not to mention the heat dissipation required for cooling the barrel every time some gunpowder explodes inside to propel the projectile, and railgun generates a lot of heat. For defense, some point defense turret might be employed to intercept missiles, along with countermeasures and jamming. Against lasers, spaced armor plate can be used (think like a spaced armor in tanks, but it's a poor heat conductor). The battle could only be conducted in orbit of a celestial body. Escape trajectory can be used, but only if it intersects or near enemy trajectory. Basically when attacking a planet, there are 2 phases: Phase 1: Attacking fleet must account for orbital insertion trajectory to ensure that they achieved stable orbit while the enemy is on the other side. Of course, since there's no stealth in space, defending fleet can unload their firepower while the attacking fleet is still moving in for orbital insertion. But since the distance involved in space is astronomical (pun intended), if the defending fleet fires their missiles too early, the attacking fleet could see it from mar away and react accordingly by preparing point defense or change their maneuver. For an added protection, attacking fleet can set their formation to ensure anti-laser spaced armor is pointed towards the defending fleet during orbital insertion. A limitation also exist in that while the targeting computer might be able to predict enemy trajectory at long range, the projectile trajectory becomes much more predictable for the enemy to react. This creates a scenario where the defending fleet must decide whether to let their orbit carry them to the other side of the planet for phase 2 engagement if their initial defense effort fails in narrow time window or waste their limited Dv to maintain their position and pounding the attacking fleet before they make an orbit and risk much more chaotic battle and major losses when they are finally in range of the attacking fleet Phase 2: Both fleet are now in stable orbit and it's up to fleet command how to maneuver their fleet. The idea is, predicting enemy's last maneuver according to the intel and previous engagement during orbital insertion, so the fleet's orbit could be adjusted to intersect enemy's orbit, whether by changing inclination, trajectory and apsis points. The battle would be more like "air support attack run". Both fleet met in intersecting trajectory, unleash everything, let the orbit bring them to the other side, adjust orbit for next attack run according to predicted enemy orbit, rinse and repeat until one of the fleet is destroyed. A tactical maneuver such as changing into polar orbit for attacking from unexpected angles, splitting fleet for pincer attack from different trajectories, laying mines on the leftover debris field (space battles are VERY Kessler-ish, so laying some mines in resulting debris field isn't a bad idea, besides, if the mine is passive type, the heat would be concealed in the leftover heat of the debris). And no space fighters, those are rather impractical, especially concerning the life support required for pilots. Drones would be a better choice What do you guys think?

FLOOR 4917 IS UNDER CONSTRUCTION, PLEASE SKIP TO THE NEXT FLOOR

...which is made of ice cream sticks The building is a red telephone booth...

Floor ....- .---- ----. ..---: you start questioning your sanity inside a room of nothingness in the floor 4192

I wanna ask something regarding black holes. Is it possible to achieve a stable orbit around it? Like a whole system orbiting a black hole? Kinda like solar system (minus the solar) also unrelated, but how nuclear reactor are started in the first place?

8/10 kerbal in EVA suit

8/10 Cat in EVA suit

They're ARS sisters, from Date a Live. Fun fact: both Nepgear and ARS sisters was designed by same artist: Tsunako (she's the one behind Neptunia and Date a Live art design) see this: st.cdjapan.co.jp/pictures/l/16/15/NEOBK-1912212.jpg?v=2 It's Neptune (Neptunia) Tohka (Date a Live) and Tiara (Fairy Fencer F) Also, 10/10 because nep-nep

9/10 CPU candidate Nepgear

Where ICBM does a horizontal takeoff on runway The building is a police station...

Copying KSP into 4 separated folders, each with their own specialization: Aircraft, Space exploration, War machines, Watercraft. I did it because I'm using a crapton of mods and my computer isn't powerful enough to handle all of it, so I divide the mods into 4 categories above and use them on different KSP folder

An ankh? Maybe they're blessed by Tut-Un Jeb-Anh (Those pyramid in the desert?) with immortality?

Their EVA suit contains an RTG to keep them warm (those PB-NUK can last forever!), outfitted with closed cycle life support that lasts forever, coated with the same material used in heat shields to (mostly) survive reentry, and their helmet was made from metal with the amalgam of kraken's chitinous parts, allowing it to survive a head-first landing (with an unfortunate tendency to summoning an actual kraken)

...Which is actually nuclear silos full of bananas The building is a hospital...

https://wiki.kerbalspaceprogram.com/wiki/J-90_"Goliath"_Turbofan_Engine While the engine looks similar to other high bypass turbofans, the engine was specifically designed based from those 2

Based from Rolls-Royce Trent 800 and the GE90 high bypass turbofan engines. The designation “J-33 Wheesley” may be a reference to the real-life JT3D turbofan jet engine, also known as the TF33, made by U.S. aerospace company Pratt & Whitney. It's shape slightly resembles the engine Junkers Jumo 004, one of the first jet engine

My first flight? Well, I made a MiG 21 replica, and shortly after it takes off, it goes uncontrollable, spinning crazily on the air before smashed into the hangar facility. The cause? I didn't know about mirror symmetry back then, so I put wings one by one, which obviously makes it horribly imbalanced, and I didn't put any elevon, leaving the craft being controlled only with puny canard that I attached in the rear (also imbalanced)

It's actually 50 megaton. The original design does have 100 megaton yield, but the bomb was scaled down to 50 megaton when they realized the bomber won't be able to clear the blast zone in time after dropping a nuclear bomb with 100 megaton yield

It's literally Jeb's wet dream of rocket fuel. Any rocket loaded with that is almost guaranteed to explode spectacularly since it's extremely reactive, poisonous and dangerous. Back then, so many people died while trying to study it that there's a reason they're called "fluorine martyr" It does makes launching cost lower, but at the same time the risk of catastrophic failure becomes higher, which isn't what you want in an operation like a space program. A safer but pricier option is better than riskier but cheaper option when it comes to launching rocket to space

Can you like... delete the save file and make a new one? Haven't done it yet, but I think it should be able to reset the values

I give it B- MH mission builder is rather buggy (which is the main value!) and seems constraining the wide open sandbox nature of the game, not to mention the sparse activity about mission builder in the forum. Good thing is, it's useful in placing craft practically anywhere for a good photo shoot New parts? The only parts that I appreciate is Soyuz capsule with IVA, nothing more, since everything else is already done in better quality by modding community. Structural parts? Near future construction did it better. Engine plate? SpaceY has a 40+ engine cluster plate. Wheels? Kerbal Foundries has a lot of choices. Engines and command pods? A WHOLE METRIC CRAPTON OF MOD HAS DONE IT! Still, I'm giving the B- score because AT LEAST, it's a sign that the dev hasn't died yet in developing this game (B- was a bare minimum of passing grade in my university)

Good luck!