Author | Lightnews

marsreddicus.bsky.social @marsreddicus.bsky.social · 5h

true, I was thinking of general limitations of DSIs reached at approximately Mach 2.0, has indeed nothing to do with the F-35.

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marsreddicus.bsky.social @marsreddicus.bsky.social · 13h

Very cool thread, big thanks!
A cheesy question now. How does the F-35 manage to achieve sufficient air compression at Mach 2.0 with the elegant but boring diverterless supersonic inlets (DSI)? Is the inlet volume expanding very much behind the cabin to compensate?

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BaA43A3aHY @baa43a3ahy.bsky.social · 18h

Spike inlets, the TsAGI way.
Soviet vs. Western designs🧵

One of the most common design of air inlet used on supersonic aircraft is the axisymmetric diffuser with external compression, which is just a fancy way of describing the spike/cone inlets of the: Mikoyan & Gurevich SM-12/12PM/12PMU, Ye-3U...

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BaA43A3aHY @baa43a3ahy.bsky.social · 2d

MiG-21 supersonic inlet design🧵
Small Nose vs. Big Nose

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Anders Puck Nielsen @anderspucknielsen.dk · 3d

The times when military vehicles looked cool are over.

Angelica Shalagina🇺🇦 @angel-shalagina.bsky.social · 3d

🇺🇦🇺🇦Ukrainian Humvee on the roads of Donetsk region

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BaA43A3aHY @baa43a3ahy.bsky.social · 6d

Variable-Sweep Wing Structural Alloys🧵
Past, Present & Future

Given my interest in variable-sweep (V-S) wing combat aircraft, for the past few years I have wondered if & by how much has materials science & technology advanced since the mid 60s to mid 70s (the heyday for wing designs).

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Baba Yaga Fèlla @babayagafella.bsky.social · 10d

Satellite images showed how the Mariupol cemetery is expanding

According to various sources, Russia has killed more than 100,000 civilian residents of Mariupol, the Center for Strategic Communications and Information Security reported.

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Beefeater Fella @beefeaterfella.bsky.social · 20d

Russia’s National Welfare Fund

A timeline to depletion, analysed and calculated.

A free deep dive from Beefy!

Please support Beefy - if you can, with a coffee or two!

open.substack.com/pub/beefeate...

Russia’s National Welfare Fund

A timeline to depletion, analysed and calculated

open.substack.com

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MAKS 25 👀🇺🇦 @maks23.bsky.social · 21d

– Europe will not have to lift fighter jets into the air — these mini-missiles can be used, because they are 16,000 times cheaper to operate.
– A range of more than 3 km, autonomous detection and tracking using AI.
– The missile can be launched from a hand cannon, a rifle-type device or a vehicle.

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BaA43A3aHY @baa43a3ahy.bsky.social · 22d

The F-14's Wing Center Section🧵

The F-14’s Wing Center Section (WCS) is made of Ti-6Al-4V α–β titanium alloy in the annealed state (UTS ≈ 896 MPa), probably the most commonly used titanium alloy in the aerospace industry. The structure assembled by electron-beam welding (EBW).

F-14A of VF-2, 1989.
Photo by David Baranek.

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marsreddicus.bsky.social @marsreddicus.bsky.social · 28d

Highly interesting threads, especially for engineers of the field. Thank you for the work! Some interesting design concepts of the past are often forgotten.

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BaA43A3aHY @baa43a3ahy.bsky.social · 28d

A3J Vigilante - the gold plated, titanium giraffe🧵

The North American Aviation A3J (first flight 31 August 1958) was one of the most advanced aircraft of its time, especially in terms of manufacturing technologies.

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H I Sutton @covertshores.bsky.social · Sep 25

Seriously one of the coolest videos ever

Rebecca R Helm @rebeccarhelm.bsky.social · Sep 24

I get that the news cycle is packed right now, but I just heard from a colleague at the Smithsonian that this is fully a GIANT SQUID BEING EATEN BY A SPERM WHALE and it’s possibly the first ever confirmed video according to a friend at NOAA

10 YEAR OLD ME IS LOSING HER MIND (a thread 🧵)

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Agathe Demarais @agathedemarais.bsky.social · Sep 18

Which data points are the most useful to understand US-EU relations in the trade, investment and financial fields—and what do these data tell us about the impact of Trumponomics 2.0 on Europe? Here's a selection of 12 charts from my new @ecfr.eu policy brief 👇 [🧵 Thread]
ecfr.eu/publication/...

Ride the wave: A big, beautiful European strategy for Trumponomics

The US president is throwing the EU lots of economic curveballs. Brussels should not be distracted by these; instead, it should double down on adopting measures that will benefit the bloc long after…

ecfr.eu

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marsreddicus.bsky.social @marsreddicus.bsky.social · Sep 18

Thank you for the article!

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Anton Gerashchenko @antongerashchenko.bsky.social · Sep 14

President Stubb:

Power politics is back, spheres of interest is back, Russian imperialism is not gone, so start adjusting.

Right now we're living in a 1918, 1945, or 1989 moment in world history. And now we're in a similar situation. We just don't know where the world is going to go.

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marsreddicus.bsky.social @marsreddicus.bsky.social · Sep 9

Sounds bad, but less bad than what the Iraqis and Egyptians experienced. It seems only very few "loyal" Warsaw Pact countries got a better treatment and Syria in some rare ocassions.

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marsreddicus.bsky.social @marsreddicus.bsky.social · Aug 27

"Made it?" By what terms is this a success? No payload delivered, no recovery of any of the parts...just detonations again, so basically a failure in all chapters. Another exploding rocket on the sea is a success? we are two decades away from any usefuless of this.

marsreddicus.bsky.social @marsreddicus.bsky.social · Aug 27

By what terms is this a success? No payload delivered, no recovery of any of the parts...just detonations again, so basically a failure in all chapters. Another exploding rocket on the sea is a success? we are two decades away from any usefuless of this. Not even worth mentioning manned flight

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BaA43A3aHY @baa43a3ahy.bsky.social · Aug 20

Internal fuel volume/Aircraft empty weight.
[Litres/Kilograms]

For Soviet aircraft, fuel volume is total. For US ones, its usable (total-trapped). Empty weight includes oil, oxygen, other consumables (for US aircraft, trapped fuel too). Configurations include the internal guns.

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UNITED24 Media @united24media.com · Jul 1

Russia turned these once-thriving Ukrainian cities into smoldering ruins.

🧵 1/9 ⬇️

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BaA43A3aHY @baa43a3ahy.bsky.social · Jun 28

MiG-23 turn rate🧵

One important fighter aircraft performance parameter, for close range air combat, is turn rate [ω, measured in °/s].

I will be comparing the maximum sustained & instantaneous turning ability of the MiG-23, with that of other contemporary fighters.

a fighter jet is flying through a cloudy blue sky with smoke coming out of its tail .

ALT: a fighter jet is flying through a cloudy blue sky with smoke coming out of its tail .

media.tenor.com

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Aram Shabanian @aramshabanian.bsky.social · Jun 25

This Iraqi armored vehicle graveyard is like an I Spy book for AFV nerds

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Jeffrey Lewis @armscontrolwonk.bsky.social · Jun 23

Why am I so unimpressed by these strikes? Israel and the US have failed to target significant elements of Iran's nuclear materials and production infrastructure. RISING LION and MIDNIGHT HAMMER are tactically brilliant, but may turn out to be strategic failures. 🧵 1/17

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WarTranslated (Dmitri) @wartranslated.bsky.social · Jun 22

Aftermath of US Navy Tomahawk missile strike on Iranian nuclear site in Isfahan last night.

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