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fuel jp7 Related Articles
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fuel jp7 Post Review
Det 4 Blackbird 61-7964 is prepared for its final journey home in one of Mildenhall’s purpose-built barns on January 18, 1990. Note the barn floor, awash with JP7 fuel - the SR-71 leaked like a sieve until the airframe heated up in flight and the joints tightened. (📷Bob Archer) https://t.co/O1Uivz9UdC
SR-71 creating its famous green flashes, #AirFeteairshow, #RAFMildenhall, England 1981. #TEB was used to ignite the fuel a limited number of times: 16; when TEB was exhausted the mission would have to end.#sr71blackbird #jp7 #aviation #supersonicplane #spyplane #triethylborane https://t.co/T2f8CxcObS
@MrTibbsss @shaunmansel13 @911b0t The equivalent of jet fuel JP7 or JA1 can you confirm. 🤣🤣 https://t.co/qgyUEtpeUl
More than 1,350 Tucson residents file suit claiming Air Force pollution making them sick https://t.co/mY9CJ7NV6b https://t.co/LDD4dckfvF
@EOLUS same here Rocket Fuel all around! Coffee just doesn't cut it anymore! JP7 anyone?
@nathaliejacoby1 Jim Beam Rye we nicknamed it JP7 because it smelled just like the fuel used in our Ch-46 helicopters. I haven't drank alcohol in over 5 years since I started as a mentor in Veterans Treatment court. I felt like a hypocrite because those i mentored must maintain sobriety
Today I learned that the SR-71's fuel, JP7, was so stable that it was used as a coolant for the engine, hydraulics, and leading surfaces.
Love learning more about the SR-71. This video has great info on how the P&W J58 engines operate as a Turbojet AND a Ramjet. Interestingly, they had to create a new fuel for the SR-71. Called JP7, the fuel was so stable it was also used for cooling. https://t.co/5cu6y4l3Of
@rands / @gebl: he doesn't mention this, but the fuel, coolant, and hydraulic fluid are all the same: JP7.
LMAO!!! JP7/8 fuel is sooo much cleaner to burn than regular gasoline. https://t.co/wUgxjYKItY
fuel jp7 Q&A Review
How much fuel (JP7) leaks while parked?
Seriously? JP7 doesn't leak unless there is a hole. I can only think of one case of jet fuel leaking, when the SR71 was fueled, it would drip jet fuel until taking off and the fuselage would expand from the heat and close the leaks. The aircraft got so hot, fuel bladders couldn't be used, and, in fact, the fuel was circulated as a coolant so the plane didn't melt. The plane was usually aerial refueled to fill the aircraft for its mission.
Is the Abrams M1A1 tank overrated? Are there better and more combat proven tanks out there?
I hear a lot of people saying that the tank is thursty and that's true but what you may not know is this thing will run on almost any type of fuel not just gas but diesil fuel, JP7, carisen hell I wouldn't be surprised if it ran off liter fluid or corn oil. Which can be a great advantage.
What are some mind-blowing facts that sound unreal but are actually true?
Lockheed SR-71 Blackbird The SR-71 couldn't be shot down because it outran the missiles., Over the course of the plane's service, more than 1,000 missiles were fired at it in an attempt to take it down. The Blackbird was the only aircraft who's Standard Operating Procedure (SOP) for an evasive maneuver was to speed up and outrun the missile. To even be allowed to work on the aircraft you had to be married., Among other requirements you needed to be between the ages of 25 and 40 and tested for "mental stability". The flight suit was as complex as the aircraft, An entirely new flight suit was designed for the aircraft. The suit was pressurized via its own oxygen system, because otherwise at over 80,000 feet the pilots would have suffocated. First Flight, The first official flight of the SR-71 Blackbird was on December 22nd, 1964 at Air Force Plant 42 in Palmdale, CA The Cockpit, Because computerized equipment was non-existent during the design and construction of the Blackbird (late 50's to early 60's) the cockpit was entirely analog on the $34 million aircraft It needed to be refueled immediately after takeoff, Because the skin of the aircraft became so hot and expanded, the plane's panels were designed to fit loosely when cold. This meant that when full of fuel on takeoff it would leak out of the panels. After the jet warmed up it would then be topped back off by a tanker. Special Jet Fuel, JP7 Jet Fuel was co-developed by the CIA, Air Force and Shell specifically for the SR71. This fuel is still used today only for the most advanced aircraft on Earth. Accidents, 12 SR-71's were lost and one pilot died during the aircraft's service career. 11 of the 12 accidents happened between 1966 and 1972. The SR-71 produces about as much power as an ocean liner., Each one of the Blackbird's twin Pratt & Whitney J58 jet engines are capable of 34,000 pounds of thrust. Transcontinental Speed Record, In 1990 the SR71 flew coast to coast in 67 minutes and 47 seconds cutting the previous record in half. During that same flight, it managed to go from St. Louis to Cincinnati in 8 minutes flat. The first SR-71's were tested at Area 51, The aircraft were built by Lockheed Martin in Burbank, CA and then trucked over to the well known conspiracy HQ in Nevada. 17 years after retirement it remains the fastest manned jet-powered aircraft in history, 2,193.13 mph is the official record, set in July of 1976 to celebrate America’s bicentennial. This image is that plane landing after achieving the speed record. Source,: ,Lockheed SR-71 Blackbird Facts Follow my blog (if not me) for the good stuff: ,Sometime on Quora
Is it possible to buy and operate an SR-71 Blackbird?
No. The SR-71 is still a protected and classified Asset. It was never marketed outside the U.S. and per U.S. code, the U.S. Government does not sell directly to private buyers anyway. Even if it did, you're SOL (Shit Out've Luck) ever getting one to fly. When the SR-71 was FINALLY retired for the umpteenth time ('99), the USAF made sure the bird could not be used (thanks CIA...) by burning off all of the remaining JP7 fuel that the J58 engines used. JP7 was only widely used on the Black Bird, no other aircraft really used it. You'd also need a unique fitted KQ-135, (a 'Q' model heavily modified) with tank and fuel systems capable of moving the standard fuels for itself (which today is JP8 or the Synthetic stuff) and the JP7 for the Black Bird. The Tanker needs to be one of those used in real sorties by the Black Bird crews, as it flew at nearly it's maximum air speed with minimum flutter in order to allow the Black Bird to refuel without stalling. This doesn't even get into the trials of just starting the damned thing when it's on the ground. Each J58 required massive (originally Buick, though I think they went to Ford motors later) motors just to turn over the Engines, and because JP7 had such a high flash point, to even get the Engine Combustion to start, the J58s need a shot of TEB, or Triethylborane, of which the SR-71 usually only had around 16 shots of to start it's ABs. You could still probably "steal" (eh hem) some JP7 from Boeing, some how, maybe, as the X-51 Wave Rider SCRAMJET demonstrator also uses JP7, or a variant of it. However, you're not going to be flying any Black Bird, privately, any time soon - even if it was Legally acquired. The bloody things were expensive to run for a good reason.
What is the oddest quirk of the SR71 that’s different from any aircraft?
Modern techniques of making aircraft invisible include electrically ionizing the air in front of the aircraft. This is called “Plasma Stealth”. Radar waves simply get absorbed by the plasma and never return. In the mid 1960’s the SR-71 is believed to have done this with massive electron-beam guns inside its nacelles. In theory, the entire aircraft could have been concealed, but in practice the SR-71 was pretty stealthy already and this only was an attempt to conceal its engines. It is known that this was built and tested, but not implemented, because it was very near the end of the SR-71 program. Besides, the SR-71’s major defense was simply its speed, and psychologically there was always a “Because fuck you, that’s why” joyousness about the whole program, so being invisible to radar was not critical. By the end of the program the SR-71 had been fired at by missiles, some say, as many as 4000 times, and the most a pilot ever had to do was knock the throttles up a tad. When firing at the SR-71 cruising above 25,000 meters (some say its operating ceiling was 35,000 meters), the air is so thin that the maneuvering capability of any missile is practically nonexistent, even in a head-on shot. One other thing: The special fuel..JP7… is first used for air conditioning fluid, then for hydraulic fluid, then burned. When the SR71 is on empty, nothing works.
Why is the SR-71 Blackbird no longer in service?
The Lockheed SR71 Blackbird is an extremely difficult aircraft to field. Fuel The SR71 uses a low volatile turbine fuel known as Jet Propellant 7, or JP7. It was developed because the SR71’s engines, the Pratt and Whitney J58, worked best at Mach 3, and the temperature of the aircraft’s skin at that speed is very high. JP7 was designed such that temperature would not affect the fuel.igniting it or otherwise causing damage to the aircraft. JP7 was different from other aircraft fuels. It had to be stored in special containers, air-refueling had to be done by special KC135Q tankers, and costs for the fuel were high. The high flash points also meant that the engines had difficulty igniting the fuel-Lockheed ended up developing triethylborane based chemicals, and the engine had to be started up by a special cart called the AG330. The expansion of the SR71 during flight also meant that there had to be gaps in the aircraft while on the ground. As a result, the fuel tank was leaky until the body expanded and the gaps were sealed up. On the tarmac, it was obvious that the JP7 was leaking out. Thus, the fuel tanks were never full before take-off, and only a while into the flight, when the Blackbird got to refuel, could the tanks be filled. Accidents Out of 32 SR71s produced, 12 were lost. Out of the 3 YF-12s produced, two were lost. This perhaps proves the point that while the SR71s were very well designed aircraft, with very well trained crews, it’s safety record was not good, and any room for error could potentially cause an accident. Advancement of SAM technology No SR71 has been lost to enemy action before. With the ability to outrun many SAMs developed by the Soviets and the Chinese, this aircraft was able to evade enemies simply by accelerating. However, as the Soviets developed the SA-5, this ability of the SR71 was being threatened. It could no longer do its job completely safely. Satellites Towards the later half of the Cold War, satellites were becoming better and better. With the ability that the SR71 had of taking reconnaissance photographs, the satellites also did not need to be on high alert, required less manpower and resources, and had a better chance of survival. With this, it considerably outperformed the SR71. Collapse of the Soviet Union In the early 1990s, the collapse of the Soviet Union removed the largest threat to the US. With internal chaos, the Eastern Bloc was soon split, and there was little or no threat that the Soviets could muster against the US for a decade. With nothing important to spy on, the SR71 could not fulfill its designated purpose. Age At some point an aircraft must retire. The SR71, having been designed and built in the 50’s and 60’s, was a really old aircraft. It was becoming increasingly obsolete, and the Air Force, together with the CIA, could see that it was not necessary anymore. Hence, there was a general consensus that the SR71 had to be removed from service.
Why couldn't the US Air Force just put the SR-71 Blackbird's fuel in bladders in its fuel tanks so they wouldn't leak on the runway?
That's not the Air Force's concern, but Lockheed Martin's, to be fair. I mean the CIA was actually the first customer for the design (as the A-12). And the reason is because bladders are not very useful. Very few high performance aircraft of any type use actual bladders anymore. The wing tanks are literally that, hollow spaces in the wing cavity sealed to hold the fuel. The spars not only have holes for weight savings, but to also let the fuel run through. The fuel holds are then sealed and strengthened as they're design to contain fluids under pressure. These hard tank cavities are pressurized with an inert gas like nitrogen to keep fuel pressure high and avoid vaccuums as fuel is drained; while keeping the risk fire from fluid and vapors low with the use of the inert gasses. For the SR-71, adding those bladders would have meant added weight and mass and it's possible that was not very keen for the design. At the speeds the Blackbird was intended to fly, extra mass can be an issue. You also need to make sure the bladder material could hold JP7 with Skunk Piss without some sort of corrosion or contamination occurring and in the 50s, I'm unsure if that was possible. The aircraft was also designed with a lot of thermal expansion in mind and I'm sure that played a role when it came to deciding how fuel would be stored on board. The bladders of the time may not have handled the heat well at all and could have ruptured in flight as they warmed up and their elasticity changed. A pressurised bag of fluid busting a leak is not a good thing. It's also a misnomer that the Blackbird leaked so much in the first place. It did leak fuel but it was more of a light drip along most of the joining seams - like a slow leaky faucet. Contrary to popular opinion, the aircraft was not a rolling shower of JP7 while on the TARMAC. It was still unique in the sense that we certainly don't see that in every day aircraft today but that's it. The leaking was clearly never so bad that it was considered a huge problem that warranted another form of sealing or added mass via extra seals.
If the SR-71 leaked fuel sitting on the ground, why did the ground crew not drain the tanks empty after landing?
Generally, they filled the tanks with nitrogen upon landing to prevent any chance of combustion; and, the fuel was JP7, which had to be heated prior to it’s burning in the huge engines - which means there was a low chance of that kind of combustion occurring.
How did pilots of the SR-71 Blackbird prevent the aircraft from leaving contrails over 65,000 feet?
The pilots didn’t, but I think that the JP7 fuel did. Unlike JP4 or JP5 which are basically kerosene with some alcohol for antiicing purposes, JP7 is an extraordinary witches brew of components to increase is lubrication value, increase temperature stability, and I believe reduce the formation of contrails. A major fraction of conventional kerosene fuels burn and produce water vapor. Remembering that contrails are the result of superheated water vapor hitting cold air, I don’t believe that the contrails were entirely eliminated, they were, I believe minimized.
If car engines are shut down when refueling with gasoline for safety, how is aerial refueling practical especially when they are risking expensive aircraft and highly skilled veteran pilots?
JP7 (Air Force ‘jet fuel’) is much less explosive than gasoline. it has a higher combustion point. It gives off less fumes, but it still gives off explosive fumes. Therefore, IN COMPARISON to gasoline safer to work with. Nevertheless, aircraft are refueled on the ramp with engines running all the time. Watch a “hot turn” video for example. The trick is that there isn’t a trick. The fuel nozzles are well away from the engines, the fuel nozzles are positively connected before fuel is pumped, no fuel is spilled, fumes are kept to near zero, the people doing the fueling are trained, aware of risks, supervised, and work as a team. Just as driving to work is a risk that is mitigated, the military has mitigated the risks. They’re still there just accepted and dealt with, like everything else the military does.
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