Roger Levasseur

@Habubrats71 A J58 on display at the New England Air Museum.

@Habubrats71 With some J-58 engines on carts in between the jets

Who can tell me what this is?

@DJSnM And the actual lunar lander had no seats.

AGI will be achieved when I can roast the software that created this image and make them feel embarrassed.

@Mauricio_asz @NSFVoyager2 Not necessarily. Half of the year the Earth is gaining on it because Earth moves faster in its orbit than does Voyager's speed. Then Earth starts going away and off to the other side of the sun and increasing the distance.

@NSFVoyager2 The Voyager still needs to travel about 600 million kilometers to reach a distance of one light-day.

Sister ship Voyager 1 is currently ~23h 31m 51s of light travel time from Earth (2026:112:120000:1L)

@engineers_feed 48 + 30 = 78 .... 78 + 7 = 85

What happens in your head when you add 37+48?

@TexasOffset @perpetuoasombro Designed for the Navy for carrier ops.

@perpetuoasombro Definitely modified for carrier ops.

Impressive view of an F-4B of VF-142 ready for launch from the USS Midway (South China Sea, August 1964). Note the catapult bridle attached to the aircraft, the extended nose wheel strut and the angle of attack sensor sticking out of the small circle just in front of the "210"

@retardedanalyst @engineers_feed A mall? Malls are so going out of style.... no, the correct modern term is now "Data Center". 🤣

@engineers_feed They won’t know what hit them when we build a big ass mall over it

Apollo astronauts' footprints on the Moon may last for millions of years.

@GraigMurphy @AngelaLMorabito And around 40 other riders who on being alerted spread the news to other parts of Middlesex County, as well as to Essex County, and to Worcester County to the west.

@AngelaLMorabito No one ever talks about William Dawes and Samuel Prescott … If only their names were in a nursery rhyme they’d be remembered

Tonight is the 251st anniversary of Paul Revere’s midnight ride. If he were to make the same journey from Boston to Lexington today, he could stop at 7 Dunkin locations. (via Reddit)

@engineers_feed In some cases the electric fields generated can accelerate electrons into air molecules and generate X-rays, or stronger particle collisions that generate gamma rays and positrons.

The average lightning bolt is only about 1 inch in diameter but can contain temperatures of up to 30,000 Kelvin, which is hotter than the surface of the sun.

@Bootboy1973 @MilHistNow Because of US Navy hit- n-run carrier raids on Japanese island bases thru the early part of 1942, the Japanese setup a picket line of patrol ships to get an early warning of anything approaching Japan. Because of the sighting they launched sooner than planned.

@MilHistNow Iirc they had to launch prematurely early because a Japanese ship sighting.

Today in 1942, 16 twin-engine B-25 bombers secretly launch from the deck of the carrier USS Hornet and mount America's first air strike on Japan. The Doolittle Raid, which comes just 132 days after the attack on Pearl Harbor, surprises the world. See: militaryhistorynow.com/2020/04/14/thi…

@MilHistNow But they weren’t the only messengers. Around 40 others when alerted rode horses to carry the message thru-out Middlesex county.

Tonight in 1775, messengers from Boston gallop north towards Lexington and Concord to warn that British regulars are on the march. Among them is a silversmith named Paul Revere. He and fellow riders William Dawes and Samuel Prescott will be captured but the alarm is raised.

@engineers_feed I hope they tank you!

Someone asked me to name two structures that hold water I was like well damn

@project4_4 17 U-boats were lost that April. The following month became "Black May" with 43 lost.

Coast Guardsmen on the deck of the U.S. Coast Guard Cutter Spencer watch the explosion of a depth charge which blasted a Nazi U-boat's hope of breaking into the center of a large convoy. Sinking of U-175, April 17, 1943. On 17 April 1943, the U.S. Coast Guard cutter Spencer was escorting Convoy HX-233 in the North Atlantic when sonar detected German submarine U-175 attempting to penetrate the screen. The Battle of the Atlantic was at its height, with German U-boats seeking to sever supply lines between North America and Britain. Spencer launched depth charges that forced U-175 to the surface. A running gun battle broke out as the submarine’s crew attempted to man their deck gun, but heavy fire from Spencer and nearby escorts quickly disabled the U-boat. Coast Guardsmen then watched as the damaged submarine sank beneath the waves. Out of U-175’s crew of 54, twelve were killed and 41 were rescued and taken prisoner. The action was a clear demonstration of the increasing effectiveness of Allied anti-submarine warfare by 1943, when improved radar, sonar, and escort tactics began to turn the tide against the once-dominant German U-boat force.

@MmPson2 @NSFVoyager2 November 13 is the estimated big day!

@NSFVoyager2 Nearly a day away.

Sister ship Voyager 1 is currently ~23h 31m 53s of light travel time from Earth (2026:107:120000:1L)

@WWIIpix The first message, in JN-25, was intercepted on April 13, and decoded fragments indicated he was doing an inspection tour, so more work was done to read more of it. But the Japanese also retransmitted the information in the inter-island JN-20 code and more info was decrypted.

This day in 1943, U.S. naval intelligence intercepted a radio message which contained time and location details of Yamamoto's (commander of the Imperial Japanese Navy) air route. 18 P-38 fighter aircraft would fly 600 miles to intercept the Admiral at Bougainville. #WW2

@Joinmich @mawei_spoiler @DJSnM Tons of certification paperwork on top of it all.

@mawei_spoiler @DJSnM Indeed. Could be done in software, but would increase the software footprint and testing scenarios. Imagine the liability if it fails!

POV, hand flying at the limits of partial panel on a G7 Cirrus. Only airspeed, altitude and heading. Also, no peeking outside allowed.

@Jason_R_Burt In Korea he flew many missions as wingman with John Glenn.

During World War II, Boston Red Sox great Ted Williams gave up what could have been some of his best playing years and over 40k dollars for three seasons, nearly 700k a year in today’s money, to join the Marines and do his part. 🇺🇸

@nz_novotny @bletchleypark The plugboard feature wasn’t part of the original version: it was added later in the 1920s.

@bletchleypark Enigma_July 8 1918_Arthur Scherbius

We’re delighted to showcase Enigma A320, an early model of an Enigma machine, as our Object in Focus. This year marks 100 years since it was acquired in 1926 by the Government Code and Cypher School, the organisation that relocated to Bletchley Park in 1939. The purchase of this machine had important ramifications for British intelligence services during World War Two. Come and see it in person to discover its remarkable story. #BletchleyPark #Enigma

These two photos were shot only about a day apart, showing that only a thin veneer of snow covered the summits Thursday morning. Temperatures will plunge tonight as a cold front passes through, with the possibility for some snow overnight transitioning to snow showers tomorrow.

Happy #BigWindDay! 🌬️ In 1934, Mount Washington observers recorded a 231 mph wind—a world record that held for decades and a testament to the mountain's extreme weather and dedicated scientists. We are proud to carry on that legacy today.