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Dr Rachel Pawling 🌈🏳️‍⚧️ Profile
Dr Rachel Pawling 🌈🏳️‍⚧️

@R_P_one

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Sometimes I design ships. Most times I design how to design ships. Tweets not representative of employer or client policy. She/Her/Hers. @R_P_one @techhub .social

Joined October 2011
Don't wanna be here? Send us removal request.
@R_P_one
Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Internet tells me that today is the 500th birthday of the Swedish Navy, so to celebrate, have this photo of a totally innocent island.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
OK, first thoughts. I see four pairs SS-N-12 launchers seemingly intact. Major damage seems to be in way of the midships deckhouse with AK-630 CIWS. That's a fair amount of cookoff if the ammo catches. The black patches seem to be smoke from shattered windows. 1/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
7 days
WHY IS THE PERSPECTIVE SO WIERD? So many of these DoD paintings looked like they were referenced from spy cameras with fish eye lenses. Oh, wait…
@vodk_anon
Vodka 🧊
7 days
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
Regarding The Slanty Ship. Landing ships usually have wing compartments either side of the vehicle deck, allowing access, space for troop accommodation etc. This can cause a severe list from relatively minor damage, due to the asymmetric flooding. 1/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
3 months
I used this image to explain the ‘80s to my students…
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 months
So, pending further information, I'm not very stressed over DIAMOND using her 30mm to down drones. Palletised 30mm has been provided to Ukraine as a counter to Shaheed. Darkened ship could be near invisible to drone operators so DIAMOND may have been able to... 1/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 years
A little known fact is that the P-47 got so big by eating all the smaller fighters.
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
Sometimes I remember that NRO launched the worlds largest spy satellite - with an estimated dish diameter of 100-120m - and straight up parked it next to an Arabic telecoms satellite to eavesdrop on phone calls from 36000km away and there’s something utterly hilarious about it.
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Dr Rachel Pawling 🌈🏳️‍⚧️
29 days
Ahh, CHARGER, the 60-knot submarine one student group produced when handed a 50MW nuclear plant and told to "sprint as fast as possible"...
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Well hullo there. US SIGINT aircraft seem to be paying a lot of attention to Kaliningrad today.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 months
In the post-apocalyptic future, where bands of cybernomads roam the blasted earth, there is only MAERSK.
@UnseenOps
Black 🇬🇱 Site
1 year
God I love armoured logistics I love all-terrain heavy trucks with ISO containers and angular ballistic glass cabins
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 years
Polyarmourous; someone who likes many types of tanks at once.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 months
This is it, the most cursed wing configuration. The more I look at it, the more I want to scream.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 years
I spent actual time doing this and I am completely unashamed at that:
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
THERE IS ANOTHER
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@DBiomech
Darth_Biomech
1 year
If you're a sci-fi spaceship designer, you're legally required to use only these three design templates for your spaceship guns. Sorry, but that's the law, I guess, if even hard-sci-fi artists do that.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
There's a WHAT airborne today?!
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
I repeat my theory that this demonstrates that the P-47 got so big by eating all the smaller fighters.
@violetpilot1
Skies-of-Glory
2 years
P-47 comparison
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
A reminder that students do not always do what you expect. After being instructed that may only use a 190kWe solid-state nuclear reactor, the students realsed we hadn't specified *how many* and so fitted five of them :D
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
One of our brilliant @uclmecheng PhD students brought some visual aids for his (successful) PhD defence - colour 3D printed submarine cutaway models!
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
Slanty ship analysis. Assuming watertight compartments A-M as shown - dotted line is where think the vic deck narrows. I've assumed the ballast tanks are divided into wing tanks and a centre tank. A lot of assumptions and a crude hullform but intact seems reasonable so OK... 1/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
11 months
Hey Siri, what is freeboard?
@Saturnax1
Saturnax 🇸🇰🇪🇺🇺🇦
11 months
Brazilian Navy's Roraima-class river patrol vessels.
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
Lead. Lead? LEAD. This claimed room temperature superconductor is based on LEAD. All this research with wierd things like yttrium or lanthanum and it might be LEAD.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
The engagement radars for SA-N-4 and SA-N-6 both appear to be stowed. Given that the fire monitors seem to have been abandoned running I think it unlikely the radar were carefully stowed after the hit: This would lend credence to the story the crew were distracted by a UAV 4/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
The UAV would be an easy target so they may have been watching to see what it did. The distraction here is conceptual - it's not that they are looking the wrong way, it's that they are focussed on the wrong *type* of threat. This has happened to others before. 5/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
11 months
An interesting aspect of nuclear propulsion was that it made atmosphere control hard in odd ways. As the boat was no longer ventilated regularly, previously unnoticed contaminants would build up. Examples in the literature include 1/2
@AncientSubHunt
AncientSubHunter 🇺🇦 🇮🇱🌻
11 months
(NYTimes Mar 20, 1953) - 23 volunteers...have been sealed in the hull of the Fleet submarine HADDOCK since January 19th, in an effort to find out how much CO2 can be tolerated...they have lived in a machine-controlled atmosphere...is vital in the design of atom-driven subs.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 months
Shahed - which in most versions has no targeting sensors - being called a drone whilst Tomahawk Block IV - which can loiter and image targets - is still a missile shows just how nonsensical the term “drone” has become. Does it really just mean “trendy in defence circles”?
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
"1" marks lower hull damage that may be the result of a strike or the subsequent internal fire. "2" marks what appears to be a destroyed deckhouse (IIRC these ships have some aluminium in the deckhouses). However 2 could be due to cook-off of the AK-630 mag. Or a missile hit.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
...and the presence of paint over most of the hull (on the side we can see, anyway) makes a widespread high-temperature fire unlikely. *Based on this one photograph only*. I would be *very* surprised if internal furnishings met modern fire resistance standards. 2/2
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Discolouration on the hull at the waterline may be; side shell blown out by internal explosion; the hole where the missile went in; paint peeling due to the heat of the fire. I don't know what delay Neptune's fuze has, so it could have exploded deep in the ship. 2/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
They finally did it. They finally "one weird trick"'d OSINT
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
"The Photo", for reference:
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Liferafts and ships' boats seem to have been launched - note the rather distinctive boat crane is deployed. So a large proportion of the crew may have gotten off. However it is clear smoke has spread throughout the after 1/2 of the ship. And that stuff is nasty. 3/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 months
*internal screaming*
@1SafetyLast
⚓️MaRiO⚓️
5 months
#repost @ mariner_world
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
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@Archer83Able
Status-6 (Military & Conflict News)
1 year
Russian channels see a Leopard tank in that... black mass. What do you see?
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Watching a USN video on 1980s CV operations that claims “No aircraft designed for land operations has ever been converted for carrier duty”. SEAFIRE HAS ENTERED THE CHAT
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
This raises questions about what damage control state the ship was in - I suspect low, as others have pointed out there was not much expectation of attack and WTDs are a pain to constantly operate. Smoke boundaries do not appear to have worked. 9/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
3 years
"Like in Red Storm Rising, when..." *looks at audience. Remembers how old I am.* "So there's this old book called Red Storm Rising..."
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 years
The thing is, it's a totally legitimate question.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
What's surprising is how far the smoke has spread. Whilst he seems to have been largely abandoned at this point, the bulk of the smoke is coming from amidships but again we see soot on the hull. This implies a rapid spread of smoke from fires subsequently extinguished 8/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Another image here. Note the "knuckle" running the length of the hull. It looks to be still nearly horizontal, so if there is a trim angle, it is small. Flooding (at the point of this photo) may have been confined to amidships, but submergence of the deck aft is imminent 7/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Of course we have to remember that a hit in the forward GT room is also close to some of the main command spaces, so co-ordinating the "internal battle" would have been very difficult 10/10 (for now)
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
IS THIS A SUBMARINE FOR ANTS?!
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 month
Thanks FB for showing me this.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Well hullo there.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 months
This hypothetical refit of the cancelled Type 43 destroyer really has no business looking as good as it does.
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 months
A return to PROPER torpedoes.
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@D__Mitch
Naval Analyses
5 months
At last! A photograph has surfaced, providing undeniable evidence of four 533mm torpedo tubes for Atlas SEAHAKE Mod4 HWT torpedoes on #EgyptianNavy MEKO A-200EN frigates. Remarkably, this marks the second instance of a modern frigate being equipped with 533mm torpedo launchers,
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Dr Rachel Pawling 🌈🏳️‍⚧️
7 months
Wait, WHAT? So the exterior of the HEAT round spins for stability whilst the interior is ON BEARINGS and does not spin?!
@ChungTzuW
Chung-Tzu
7 months
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
SGC just straight up firing AGM-65L through the Stargate never gets old :D
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Thread on reloading VLS? Thread on reloading VLS. 1/n
@ryankakiuchan
Ryan Chan 陳家翹
2 years
US Navy demonstrated re-arming vertical launch system aboard destroyer USS Spruance (DDG-111) in San Diego from Oct. 4-7. It is the first time US Navy has tested VLS reloading from offshore support vessel, using Military Sealift Command fleet experimentation ship MV Ocean Valor.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
A point on hull shape. I don't see any evidence of hull overall hull sagging at this point. Straight lines added in MS Paint. The visible smoke fits with an internal fire involving a substantial amount of non-fire retardant, smoke generating materials, and 1/2
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
"Action stations, action stations. Assume NBCD State 1 condition Zulu"
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@Kerbo46188000
Kerbo
1 year
is your space setting 'scramble spacecraft' or 'all hands to general quarters' type of setting
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Dr Rachel Pawling 🌈🏳️‍⚧️
3 years
So my aesthetics lecture, naturally, included a reference to HMS Tamar's neat paint job, but also this Victorian remix of a Type 23:
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
... downflooding would be limited unless the tank top itself was holed. This figure doesn't show us a transverse section, of course, so we don't know what was in the wing compartments (if anything). But currently this looks like a "mission kill" only - should be repairable 6/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 months
Of course I am a member of the Church of LMM so I still reckon these should be fitted. To borrrow a line from Mike Watt: "That my friend will mash up the engine block of a Fiat Uno nooooo problem" 3/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 years
The bear is in fact a plane spotter, and has been trying to get a selfie with every fighter possible.
@vladwlad777
vladvlad
5 years
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Dr Rachel Pawling 🌈🏳️‍⚧️
11 months
Copier ink (solvent is volatile & evaporates) and radon. Nautilus found the cure were getting higher than expected radiation exposure, not from reactor but rather radon from luminous paint used all over the place. As with space, propulsion is “easy” compared to life support! 2/2
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Dr Rachel Pawling 🌈🏳️‍⚧️
11 months
That should of course say “crew”. I am unsure of the effects of adding Robert Smith to submarines, but certainly hairspray wouldn’t be permitted.
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
Whilst the USVs are credited with a reasonable size warhead (200-400kg depending on source) they can't put it in a very effective place - it will explode outside the target, and above the waterline - so holing a single compartment might be all you can expect 2/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 months
Position herself to intercept without being at direct threat. In which case the 30mm makes a lot of sense as it should have a high Pk against this target, and a lot of stowed kills in the deep magazine. Save the Aster for more stressing/urgent/threatening targets 2/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
11 months
The Mk 500 "Evader" remains one of the more bonkers reentry bodies. Designed with a *fixed* crooked nose so it was always weaving.
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
Thanks to @Capt_Navy we have this profile. OK, so the diesel generators (item 8) are in the superstructure over the main machinery spaces. Beneath the tank deck (19) are ballast (20) and fresh water (21) tanks - SO... 5/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
6 months
And here we go, the @uclmecheng Submarine Design and Acquisition Course design presentations! A thread…
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Warship designers don't like leaks, but we do like onions:
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Dr Rachel Pawling 🌈🏳️‍⚧️
17 days
It is 1999. I am listening to the Ghost in the Shell soundtrack on Winamp and designing ships. It is 2024. I am listening to the Ghost in the Shell soundtrack on Winamp and designing ships.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Reading about the modernised T-55s being donated to Ukraine led me to learn of the SPOT-55, a Thunderbirds-esque fire fighting variant produced by Slovakia (photos from Reddit)
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
... unless you hit near a bulkhead of course. The video shows a hit under the superstructure, but forward of the funnel. I don't have a layout for the Ropucha-class, but it's probably forward of the main machinery spaces. There *may* be a generator space in this vicinity 3/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
6 months
Pew. Pew. Pew.
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 months
Drones have shown us the way. It is time to return to tradition. It is time to return to the propfan driven cruise missile.
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Dr Rachel Pawling 🌈🏳️‍⚧️
3 years
Finishing up the Advanced Marine Vehicles lecture for my undergrads and I always use this image to illustrate that, with enough power, "anything will plane".
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Dr Rachel Pawling 🌈🏳️‍⚧️
7 months
This is an interesting discussion I have with my students at the start of the course. We have to differentiate between complicated (a lot of parts) and complex (a lot of interactions and emergent properties). Many commercial ships are more complicated than naval vessels but.. 1/n
@mercoglianos
Sal Mercogliano (WGOW Shipping) 🚢⚓🐪🚒🏴‍☠���
7 months
Why do people keep telling me that commercial ships are less complex and sophisticated than warships? I think we can all agree that ships are all awesome!
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
I do love these Cold War era paintings. Much more emotive than a photo one can already see in multiple places on-line.
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
But that's speculation - an overhead shot of the funnel would help figure it out (or a layout! :D). Downflooding will probably have occured however so the extent of the damage might be a single wing compartment and the hull beneath it flooded. 4/end?
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Dr Rachel Pawling 🌈🏳️‍⚧️
5 years
I want to be sad but all I can think of is the possibility of a band of piratical raccoon submariners, sailing the high seas, searching for gold doubloons. And trash.
@KingNeptune767
Eric Moreno
5 years
Podvodnaya Lodka B-427 Scorpion - one of the two US submarine museums that are rotting away and have secured access to the public. It apparently has a raccoon infestation. Sigh.... @sovietsub @Capt_Navy @USNHistory @museumships
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
Since there was a thread about accommodations on USN SSBNs, here's the deck plan for the crew spaces on the first generation French SSBN, Le Redoubtable. Along with a couple of interior shots of the classy '70s decor!
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
For those wondering what a rocket landing ship was and why it was so insane; they carried large numbers of unguided rockets and would be used to saturate enemy positions prior to a beach landing. Photos from Wikipedia LSM(R) pages.
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@micro_cabbage
Organic Artisanal Micro Cabbage
2 years
@R_P_one in original trim the LSM(R) was one of the most psychotic weapons systems ever made
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
Think back to that time the USAF had a system that would probably be really good at taking down balloons in a controlled fashion…
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
OK. Some preliminary results. Any more detailed than this is work stuff and probably won't be put here. This is a very quick model using the published profile. Assuming a missile hit in the forward gas turbine room which floods that and the spaces either side 1/n
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 years
The true secret of a submarines' reactor compartment:
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
I was expecting a generic Rigid Inflatable Boat, but no, the new JMSDF frigates carry these “classic” boats!
@isokko
ISOKKO
2 years
海上自衛隊護衛艦 FFM2『くまの』艦尾ハッチが開かれ、作業艇がレールを伝って出てきました。
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Dr Rachel Pawling 🌈🏳️‍⚧️
3 years
This. On a night bus home some dude boxed me into a corner and the chap in the seat behind us did a frankly exceptional job of engaging and distracting him with this type of “banter”. Wish I could have thanked him.
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Dr Rachel Pawling 🌈🏳️‍⚧️
11 months
The degree to which this diagram of a TYPHOON is just Very Wrong makes my brain hurt.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 years
Why one must be very clear when differentiating between US and UK military systems:
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
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@Saturnax1
Saturnax 🇸🇰🇪🇺🇺🇦
1 year
#SubFriday #Submarines @deutschemarine German Navy's Type 212A Batch II-class U-36 (S-186) loading DM2A4 Seehecht heavyweight torpedo. Photos by Olav Standal Tangen.
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
MUAHAHAHAHAHA!
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
One odd thing about NSM is that it's launched belly-up - I presume because flat top makes integration on a launch rail easier. Another odd thing is that the whole nose rotates to keep the imaging IR seeker horizon-stabilised - enabling a high degree of target discrimination.
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Dr Rachel Pawling 🌈🏳️‍⚧️
6 months
Those are fragments or submunitions - they are chunks of metal the projectile throws sideways to steer itself.
@AirPowerNEW1
AirPower 2.0 (MIL_STD)
6 months
Advanced Low-Cost Munitions Ordnance #ALaMO
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
It’s like the Burns Slant Drilling of intelligence gathering. Either that or the eavesdropping equivalent of children yelling “I’m not touching you” whilst poking their sibling.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
I have… unusual tastes.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Kh-35 is "Uran" (Uranus) the Russian predecessor to Neptun(e). I believe these test shots may have been unarmed, but it illustrates the damage that will be done by the kinetic energy alone.
@milinfolive
milinfolive
6 years
Океанский спасательный буксир проекта 1452 «Машук» ТОФ после пусков ракет Х-35У с самолетов Су-34
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Dr Rachel Pawling 🌈🏳️‍⚧️
10 months
For a properly bonkers carrier, why not add a modern 18 inch gun battery? A 1970s proposal by one Philbin, former gunnery officer (CAN YOU TELL?!) in the USN. "A Proposal for a New British Capital Ship"
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
The SPACE Type 23 is complete! :D
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Dr Rachel Pawling 🌈🏳️‍⚧️
9 months
This era of Russian hangar design was fascinating from a mechanical design point of view, but very overcomplicated. One example of the reality (frequent (excess?) complexity in Soviet design) against what I call "the AK-47 myth" (the myth that Soviet design was always simple) 1/2
@D__Mitch
Naval Analyses
9 months
Some unusual helicopter hangars in service with #RussianNavy ships: - Photos 1 & 2: The below deck hangar of a Kirov-class (pr. 1144.2) nuclear powered battlecruiser can accommodate three helicopters. - Photos 3 & 4: The Udaloy-class (pr. 1155) destroyers have a twin half-below
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
This is an absolute galaxy-brained idea.
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Dr Rachel Pawling 🌈🏳️‍⚧️
29 days
So fast it had two reaward facing tubes to either side of the prop, as the forward tubes would be useless at speed.
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Dr Rachel Pawling 🌈🏳️‍⚧️
4 years
I thought I would apply my expertise and label it:
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Dr Rachel Pawling 🌈🏳️‍⚧️
6 years
I’ve been sorting out my chaotic files of clippings and saved articles; space hotel!
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Since we are talling about SWATHs we can't forget this brilliantly bonkers concept from USNI Proceedings. This is the relatively conventional version. The air defence variant had a circular plan view, enforced by the track of the BETATRON ACCELERATOR PARTICLE BEAM WEAPON.
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 months
It’s only a torpedo if it comes from the Torpé region of France, otherwise it’s just a sparkling UUV.
@CovertShores
H I Sutton
2 months
Video explainer now available
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Dr Rachel Pawling 🌈🏳️‍⚧️
2 years
Younger naval watchers might not quite get just how Big Of A Deal Moskvas sinking is to us oldies. That ship was a major symbol of the late Cold War at sea. The class was seen to be a low-risk alternative to Kirov, but an absolute unit nonetheless. An actual end of an era.
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Dr Rachel Pawling 🌈🏳️‍⚧️
1 year
THIS PLANE’S SEEN SOME THINGS
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@exoticaviation
Echoes in the Sky @ exoticaviation.bsky.social
1 year
a big shout-out to the twin-engined Caudron aircraft of WW1 that featured streamlined noses - particularly the G.6 and R.XI 👄
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