SR-71 61-7975

[JTVIDA]

Per Vostro diletto, alcuni frammenti da
http://www.marchfield.org/sr71a.htm della storia di questo SR;per chi non lo sapesse, si sà  praticamente la storia di ogni singolo SR.

"If you should ever need to rekindle your patriotic fires, just walk out to the flight line, look at that left rudder on our SR-71 and realize that 60-975 blew a hole in the sound barrier over Hanoi to let our POWs know we were there."

della serie.... volavano giorno e notte a mach 3 su Hanoi (città ) per rompergli le orecchie con i bang sonici per ricordare ai piloti americani catturati che l'aviazione era con loro...

http://www.sr-71.org/photogallery/black ... 004-14.jpg


"In 1987 our SR-71 (60-975) flew an 11-hour mission over Iran searching for unfriendly missiles overlooking the Gulf of Hormuz. Their revelation enabled a warning to the U.S. Navy and neighboring countries. The red scimitars on her tail are evidence of missions over the Persian Gulf prior to the Gulf War. After Shayne Meder, Aircraft Restoration Manager, tracked down a former crew chief of 975, she got the real story behind the skin patches on the right engine nacelle. It seems our Blackbird was performing a high mach outrun of a SAM (Surface to Air Missile) in 1987 and shelled a turbine blade. She outran the missile, but had to make an emergency landing as a Naval air station in the Key West area."

questa è forte... per sfuggire ad un SA- qualcosa è andato oltre
mach 3.5 (normalmente la massima velocità  è di mach 3.29).

http://www.sr-71.org/photogallery/black ... 004-12.jpg

http://www.sr-71.org/photogallery/black ... 004-06.jpg


"In February 2000, 10 years after her last flight, the museum began restoration work on 61-7975. During the restoration it was discovered that the left rudder had once been on a sister SR-71, 61-7978. This SR-71 wore the famous Playboy bunny and was named Rapid Rabbit. In 1972 during a landing mishap, 61-7978 was damaged beyond repair. Her crew safely escaped and the salvaged parts were removed to be used on other operational blackbirds"

cut.... and paste..... Il rapid rabbit si era schiantato al decollo molti anni prima...

http://www.sr-71.org/photogallery/black ... 004-09.jpg

Queste sono info e storielle e più conosciute....
Fra cui gli equivalenti 320mila kw

"The complex Pratt and Whitney J58 engines are very unique. Inlet temperatures can reach 1100 degrees C. and require astralloy discs in the turbine sections to withstand the heat. The combustion exhaust temperature reaches 2000 degrees F. The blast created by the SR71 stretches for 3000 feet and the turbulent air sizzles at over 200 degrees. The SR71 cruises in afterburner so it incorporates an Air Inlet Control System (spikes) and a bleed by-pass system, which increases or decreases airflow into the engine, when flying between subsonic and supersonic speeds. The largest engines ever built for an aircraft, they produce 160,000 horse power giving the blackbird a thrust to weight ratio of 5.2 to 1. Designed as a combination turbo-ramjet engine, after attaining desired altitude and speed, the engines are throttled back and speed is maintained by the airflow passing through the engine, thus requiring less thrust from exhaust, consuming less fuel. "


"Heat generated during flight can reach over 1000 degrees F. temperatures that cause the fuselage to expand in flight. After landing, ground crews cannot go near the aircraft for over 30 minutes. Once the plane has cooled, it literally seeps fuel on the ground until it flies again. The flight crew wears special self- contained space suits to protect them during flight and to ensure survival during a high altitude ejection. Temperatures inside the cockpit reach 200 degrees and 550 degrees on the windscreen. To heat their food they simply held it against the windscreen. A pair of complete suits cost approximately $185,000. "

"The SR-71 uses a special JP-7 high-temperature jet fuel. It can carry 12,219 gallons and, at top speed, needs refueling every 45 minutes. It consumes fuel at about 8000 gallons per hour. The fuel doesn't burn easily and it requires a chemical ignition system to start the engines. Tri-ethyl borane (TEB) is injected into the engines at start-up, re-start and when going into afterburner. The fuel system is also used to cool the aircraft environmental, hydraulic, oil, TEB systems, and associated lines. "

"The SR-71 has 6 main BF Goodrich 32-ply tires, each filled with 415 PSI of nitrogen. Impregnated with aluminum powder to reduce heat, they cost $2,300.00 each and are serviceable for approximately 15 landings. "

Infine, un'ora di volo costa....

"The SR-71 proved itself to be a valuable asset to the United States and a technological masterpiece. It was a thoroughbred; however, the $30,000 per hour price tag became too expensive to operate and the SR-71 program was canceled in 1990. "

[-{-Legolas-}-]

Molto bello.

[Vlad]

Io avevo letto una volta (non ricordo dove però) di un controllore civile che aveva ricevuto una richiesta di volo a (mi sembra) quota 60.000 piedi.
la sua risposta è stata "se ce la fai, autorizzato" al che il pilota
"ok descending from 70.000" (era un SR-71 appunto)

[Piggy]

si ricordo quel topic in cui ho letto anch'io quella storiella lì...troppo forte!!!

[FireFax]

...mi domando che temperatura possa esserci a quella quota, , nel mio ultimo volo la settimana scorsa eravamo a 36.000 e "fuori" c'erano -65°c... pensate un pò a 70.000

[JTVIDA]

...mi domando che temperatura possa esserci a quella quota, , nel mio ultimo volo la settimana scorsa eravamo a 36.000 e "fuori" c'erano -65°c... pensate un pò a 70.000

Da alcuni libri ed informazioni che ho, lla quota di volo dell'SR 'orizzontale' (non tangenza pratica) varia
secondo le missioni da 72000 a 85000 piedi
. E' riportato in fase di collaudo che sia l-SR-71 che i predecessori
(YF-12 A-12) possano arrivare a 90.000 piedi in volo orizzontale.

La temperatura esterno non immagino quella che posso essere ma invece
è certo che parte della fusoliera arrivi a circa 400 gradi causa la
frizione con l'aria.

Per il resto vi allego le sboronate più simpatiche, tratte da Sled Driver ('guidatori di slitte') il più bel libro sull'SR, IMHO.

SR-71 Blackbird pilot Brian Shul writes: "I'll always remember a certain radio exchange that occurred one day as Walt (my backseater) and I were screaming across Southern California, 13 miles high. We were monitoring various radio transmissions from other aircraft as we entered Los Angeles airspace. Though they didn't really control us, they did monitor our movement across their scope. I heard a Cessna ask for a readout of its groundspeed."

"90 knots" Center replied.

"Moments later, a Twin Beech required the same."

"120 knots," Center answered.

"We weren't the only ones proud of our groundspeed that day as almost instantly an F-18 smugly transmitted, 'Ah, Center, Dusty 52 requests groundspeed readout.'

"There was a slight pause, then the response, 525 knots on the ground, Dusty".

"Another silent pause. As I was thinking to myself how ripe a situation this was, I heard a familiar click of a radio transmission coming from my backseater. It was at that precise moment I realized Walt and I had become a real crew, for we were both thinking in unison." "Center, Aspen 20, you got a groundspeed readout for us?"

There was a longer than normal pause.... "Aspen, I show 1,742 knots"

"No further inquiries were heard on that frequency"


In another famous SR-71 story, Los Angeles Center reported receiving a request for clearance to FL 60 (60,000ft).
The incredulous controller, with some disdain in his voice, asked, "How do you plan to get up to 60,000 feet?"

"The pilot (obviously a sled driver), responded, "We don't plan to go up to it, we plan to go down to it."

He was cleared...