JP-7 (Jet Propellant 7, MIL-DTL-38219) is a jet fuel developed by the U.S. Air Force for use in supersonic aircraft because of its high flash point and thermal stability. It is the fuel used in the Pratt & Whitney J58 engines, used in the Lockheed SR-71 Blackbird. The skin friction of the aircraft's surface with the atmosphere at Mach 3+ cruising flight generates very high skin temperatures; therefore this special fuel was needed. The story told by Ben Rich in his book Skunk Works is that a lit match can be dropped in a bucket of JP-7 and the fuel will not ignite, and the match will be extinguished.
The Boeing X-51 Waverider uses JP-7 fuel to run the Pratt & Whitney SJY61 scramjet engine, with fuel capacity of some 270 lb (120 kg). As with the SR-71, the X-51A design super-cools this fuel (cooled by extended subsonic flight in the stratosphere; prior to acceleration to supersonic speeds); then, when in supersonic flight, the fuel is heated by its circulation through heat exchangers which transfer to it the heat load of the interior spaces of the airframe. The fuel is then pumped through rotating mechanical parts of the engines and auxiliary mechanical equipment, providing both lubrication and cooling. Finally at a temperature of nearly 550 degrees, it is pumped into the fuel nozzles of the engines.
D Dm7/5+
C7 Dm
Ahn der Vringspooz triffsten met singe Kumpels un dä Mammutfläsch
Lambrusco.
D Dm7/5+ C7
Dm
p dä Plastiktüüt met singe paar Klamotte steiht: Eduscho.
F C
Jo, dä Jupp trick jraad sing Sejel, huh,
Bb Bbm
F C
un hä nemp dich met, jedenfalls meint er et, un hä verzällt sich
fruh.
Om Program steiht Weltreis, wie jeden Daach verzällte, wat ihm wo
passiert ess:
Kokosnuss un Packeis, und wie hä övver dä Äquator balanciert es.
Un övverhaup, die dausend Fraue, die hä kannt,
un die Messerstecherei, sick der dä Duhme fählt ahn singer räächte
Hand.
Un eez en Katmandu, wo hä met zwei Yetis Skat jekloppt hätt;
do woot mache Nejer blass vun dämm, wat uns're Jupp och jeistig alles
drophätt.
Un dann die Wahnsinnszick als Robinson
en singer eijene Welt, janz op sich selfs jestellt, oh Mann, wer
kann dat schon ?
Jupp verzällt vum Joldrausch, un, wie hä Twist jedanz hätt met 'ner
Cobra.
Vun 'nem karrierten Zebra, dä blonde Fee us Peking, names Lola.
Nur vun Stalingraad verzällte nie -
Wo litt dann Stalingraad ? En welchem Land es dat ? Stalingraad
pack hä nie, irgendwie.