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Habu Pilot reveals why the Blackbird had to refuel after takeoff (it’s not because the SR-71 leaked fuel)
The Aviation Geek ^ | 7 May 2023 | Linda Sheffield Miller

Posted on 05/09/2023 5:48:49 AM PDT by DUMBGRUNT

No story on the SR-71 would be complete without an understanding and appreciation of just how valuable the KC-135Q model tankers and their crews were to the successful and safe completion of every mission.

“We had to refuel right after takeoff for only one reason, and it wasn’t because we leaked JP-7 fuel on the ground. Yes, the plane does leak fuel, but not enough to require refueling after takeoff.

“The JP-7 fuel reaches temperatures well over 300 degrees F. during Mach 3 cruise, making the fumes in each of the six fuel tanks very volatile and potentially explosive. The metal skin of the aircraft approaches 400 degrees F., adding to the volatility of the fuel inside the tanks. One of our aircraft limitations was a maximum speed of Mach 2.6 without an inert atmosphere inside the fuel tanks."

(Excerpt) Read more at theaviationgeekclub.com ...


TOPICS: Chit/Chat; History
KEYWORDS: sled; sr71
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SR-71 was designed with a slide rule.
1 posted on 05/09/2023 5:48:49 AM PDT by DUMBGRUNT
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To: DUMBGRUNT

I think I have that slide rule in my drawer


2 posted on 05/09/2023 5:52:56 AM PDT by algore
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To: DUMBGRUNT

Pm


3 posted on 05/09/2023 5:53:01 AM PDT by Ken Regis (I concur. )
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To: DUMBGRUNT
SR-71 was designed with a slide rule.

That's nothing. The F-35 was designed with a committee.

4 posted on 05/09/2023 5:55:46 AM PDT by Sirius Lee (They intend to murder us. Prep if you want to live and live like you are prepping for eternal life)
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To: algore

HOW TO USE A SLIDE RULE (C&D SCALES) ANALOG COMPUTER MULTIPLICATION & DIVISION
https://www.youtube.com/watch?v=rJKmc4PVdh4&ab_channel=PeriscopeFilm


5 posted on 05/09/2023 5:56:02 AM PDT by Tom Tetroxide
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To: DUMBGRUNT
hen, with the nitrogen pressurization system working, they de-fueled 15,000 pounds of JP-7,

How does one defuel 15000 pounds of fuel?

6 posted on 05/09/2023 5:56:07 AM PDT by BipolarBob (I was going to start procrastinating this year, I just haven't got around to it.)
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To: DUMBGRUNT

7 posted on 05/09/2023 5:56:39 AM PDT by Paladin2
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To: DUMBGRUNT

Interesting link as to moving her from the Burbank to Area 51. Old pics. I thought it was intersting

https://www.roadrunnersinternationale.com/transporting_the_a-12.html


8 posted on 05/09/2023 5:57:20 AM PDT by rktman (Destroy America from within? Check! WTH? Enlisted USN 1967 to end up with this💩? 🚫💉)
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To: DUMBGRUNT
A-12 ARCHANGEL CIA PROJECT OXCART
9 posted on 05/09/2023 5:57:56 AM PDT by Hot Tabasco (Mother said don't put beans in your ears)
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To: DUMBGRUNT

The RamJet was very inefficient at low speed, because it relies on compression of air to burn the fuel effectively. Takeoffs are ‘low speed’ subsonic events. The RamJet became very efficient at multiple Mach numbers.


10 posted on 05/09/2023 5:59:02 AM PDT by Pete Dovgan
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To: rktman

You beat me by 36 sec.....LOL!


11 posted on 05/09/2023 5:59:24 AM PDT by Hot Tabasco (Mother said don't put beans in your ears)
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To: DUMBGRUNT

It was leaky until it got hot and tighten up ,LOL


12 posted on 05/09/2023 5:59:25 AM PDT by butlerweave
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To: DUMBGRUNT

Had to learn how to use a slid rule in high school science class. There were no computers. Desk tops, lap tops were far into the future.


13 posted on 05/09/2023 5:59:34 AM PDT by Bounced2X (Boomer - I survived childhood with no bike helmet.)
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To: DUMBGRUNT

Nicknamed Habu by Okinawans for a local ‘cobra’ snake.

Coolest. Plane. Ever.


14 posted on 05/09/2023 6:00:23 AM PDT by Blueflag (Res ipsa loquitur: ad ferre non, velit esse sine defensione)
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To: Hot Tabasco

Early in the morning................ And still on cup #1. 🤏👍


15 posted on 05/09/2023 6:03:24 AM PDT by rktman (Destroy America from within? Check! WTH? Enlisted USN 1967 to end up with this💩? 🚫💉)
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To: DUMBGRUNT

So was the Saturn V..................


16 posted on 05/09/2023 6:04:57 AM PDT by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Blueflag

B52’s had to refuel after takeoff. A full load of bombs and fuel were too much weight for takeoff.


17 posted on 05/09/2023 6:05:27 AM PDT by DIRTYSECRET
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To: Tom Tetroxide

In Israel we were all still trained with slide rules, and still are, assuming that, during our lifetime there will be a major EMP attack, destroying computers.

Can’t say people are proficient, but they are familiar enough the learning curve would not be so steep.


18 posted on 05/09/2023 6:07:04 AM PDT by Jewbacca (The residents of Iroquois territory may not determine whether Jews may live in Jerusalem.)
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To: butlerweave

Sure. It got hot keeping up with a tanker.


19 posted on 05/09/2023 6:08:06 AM PDT by GingisK
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To: DUMBGRUNT

Best assignment I had in the military. While in Okinawa it was my alarm clock when it was time to go to work and prep for its return.


20 posted on 05/09/2023 6:09:38 AM PDT by grcuster
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