slater_just_slater
slater_just_slater t1_ja7sn30 wrote
Reply to comment by PrettyText in TIL a year after the defeat of the Spanish Armada, the English sent their own Armada to Spain, leading to similar losses of ships and men, and an ignominious English defeat by malektewaus
History is written by the victors.... and those who speak English
slater_just_slater t1_j6hw8xq wrote
Reply to comment by BKCowGod in my uncle on prom night in 1987. by turbocharged_autism
Yeah but back then with about $300 in parts and a weekend, you could easily rip 300 horsepower tonnes of torque out of a 350. With $300 parts on a BMW would get you 192 horsepower and the same torque.
slater_just_slater t1_j5yjd30 wrote
Reply to comment by Pretend_Range4129 in TIL American WW2 airplanes were sent to war unpainted starting in 1943. The polished surface made the planes faster and lighter, giving more range to all planes and more cargo hold for the bombers by PatmygroinB
The majority of the weight in paint is the solvent that evaporates.
slater_just_slater t1_j5yj2yf wrote
Reply to TIL American WW2 airplanes were sent to war unpainted starting in 1943. The polished surface made the planes faster and lighter, giving more range to all planes and more cargo hold for the bombers by PatmygroinB
There was no real need to paint high-altitude planes, also given they were designed to have relatively short lifespans, corrosion wasn't a concern. Bare aluminum still can corrode.
slater_just_slater t1_j5ux3jx wrote
alt.binaries.burgerporn.
slater_just_slater t1_j5jddd9 wrote
Reply to comment by dotsdavid in NFL stadium distances from the city center. by fruttypebbles
Probably because "Downtown" Chicago is really big. And I guess if you measure the center of it to be in the loop, Soldier Field us pretty far away.
Don't worry, you're soon going to be out in Arlington Heights.
slater_just_slater t1_iwtjku1 wrote
Reply to comment by codewordtacobell in Henry Rollins 1974 Bullis School, Potomac, Maryland by r_sharon
Were you in the shit?
slater_just_slater t1_iwomby4 wrote
slater_just_slater t1_iu8ml7m wrote
Reply to Ted Koppel, 1980. Nightline started as a daily update during the Iran hostage crisis. In the decades after Walter Cronkite retired, Koppel continued the practice of thorough, factual reporting. by L0st_in_the_Stars
Unwittingly, this countdown really helped Reagan get elected. It was a nightly reminder.
slater_just_slater t1_itlng2k wrote
Reply to comment by BuSsYBoI-sTaYpOpPiN in Tuskegee Airmen in Italy in 1944 by can1exy
Better than many, but they were still black men in the 40s and subject to Jim Crow laws, red lining and all the other institutionalized racism that Black Americans faced
slater_just_slater t1_irq4gst wrote
Reply to comment by evanc3 in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot
What is interesting is that it's the same principle to how single crystal silicone is grown for microchip substrates. However the blades are hollow.
Since they have no grain structure, nothing responds to an acid etc, on a metallograph it's just a white blob.
They do have a thermal barrier coating (TBC)
One of my jobs as a process engineer at Rolls Royce was the TBC coating. If you are bored here is a link about it.
slater_just_slater t1_irq3jgr wrote
Reply to comment by Nafeels in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot
It paid off in the end. The RB211 became one of the best sellers for Rolls and the basis for later engines such as the Trent.
slater_just_slater t1_irq3c05 wrote
Reply to comment by Boomshrooom in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot
The fans don't actually spin very fast (compared to the compressor) fans only spin about 3000 rpm so the tips don't go supersonic. The compressor spins much faster (12,000 rpm is typical however small engines can spin much faster up to 50,000 rpm) they do this by using 2, sometimes 3 shafts in the engine (one shaft inside the other). The fan is powered by 1 or 2 turbine at the very back, the compressor is powered by separate turbines at the front of the turbine section, just ahead of the fan turbines
slater_just_slater t1_irq2mxh wrote
Reply to comment by SatanLifeProTips in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot
Another big issue is blade tips going supersonic. It makes it really really loud. The Tu-95 is ungodly loud because of this.
slater_just_slater t1_irq2fgg wrote
Reply to comment by evanc3 in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot
Creep is why most 1st stage turbine blades are single crystal. Fun fact, single crystal blades are "grown" not cast.
They are also the most boring thing ever to look at under a metallograph.
slater_just_slater t1_jdst31u wrote
Reply to TIL It takes 20 years for clothing to be considered "vintage" and today’s most sought-after vintage styles are ‘90s and early ‘00s by Ok_Copy5217
TIL 1/4 my closet is vintage.
And I bought them new.