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Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
@R_P_one
Oct 17, 2022 • 5 tweets • 2 min read • Read on X
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Let's see if you can guess the submarine, from the little illustrations I use in my lecture today to show alternative pressure hull topologies. Red = weapons, control, Yellow = machinery, Green = accommodation, Orange = aux machinery. 1/5
Now this one should be obvious to oddball aficionados 2/5
Number 3, and things are getting weird... 3/5
Number 4 is either really easy or really difficult. 4/5
Number 4 seems less well known, but number 5 is a late-Cold War classic. 5/5

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More from @R_P_one

Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
Dec 5, 2024
So today’s the day of the 2024 UCL Submarine Design and Acquisition Course VIP presentations. Seven designs this year, developed to requirements produced by the staff: Image
First up, MAGPIE, a small SSK intended for wolfpack / swarm attacks in coastal defence, where boats are coordinated via seabed comms and expendable buoys. Eight heavyweight torpedoes in external stowages. Image
Whilst MAGPIE was designed with diesels and batteries due to budget limitations, an AIP option was also developed using a hull plug: Image
Read 13 tweets
Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
Aug 14, 2024
It’s that time of year again when our MSc Naval Architects and Marine Engineers get to present their ship designs to navy and industry guests. Five designs in total, meeting difficult requirements set by the course staff: THREAD Image
First up, a 60,000t 310m nuclear powered aircraft carrier, carrying 42 aircraft and with a flight deck layout ensuring CTOL launch and recovery after a missile hit. Image
Secondly, a 13,000t 150m littoral mothership, using high speed hovercraft (based on a modernised SR.N3) to deploy a raiding marine company plus light mobility from 100nm off shore. Image
Read 9 tweets
Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
Dec 7, 2023
And here we go, the @uclmecheng Submarine Design and Acquisition Course design presentations! A thread… Image
First up, AGILE. An AIP SSK with the ability to change roles via an internal module bay that can be accessed via a bolted hull section. Image
Some more information about AGILE showing the propulsion, module and ocean interfaces. Image
Read 16 tweets
Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
Aug 6, 2023
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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Trying to match this image, opening wing compartments FGHJ is getting there (igore the port-stbd flip, that's for, err... highly technical reasons (I entered the wrong Y values at first and can't be bothered to fix it). 2/n
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Flooding the vehicle deck is a bit closer - fails the UK damage standards but is still survivable, but we can see the freeboard is still higher than IRL. Flooding the centreline tanks gets us pretty close (image 2). Need to check MCY spaces next 3/n
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Read 8 tweets
Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
Dec 8, 2022
The running order for the @uclmecheng submarine presentations - follow this thread for info on each design!
@uclmecheng First up; OBSTRUCTOR; an AIP submarine specialised in minelaying and also mine clearance. Stirling engines; up to 52 mines in tubes under the pressure hull; a saturation diver habitat in the sail with a combination of divers and ROVs for MCM.
@uclmecheng OBSTRUCTOR: A series of tubes. FULL OF MINES. Under-hull arrangement was used to allow refit, and support laying of a long "chain" of mines.
Read 13 tweets
Dr Rachel Pawling 🌈🏳️‍⚧️ Profile picture
Oct 17, 2022
So what were the submarines in the little cartoons? First up was USS Jimmy Carter, a Seawolf class attack submarine modified with a midships special forces space and other devices 1/5
Next up was the comically bulbous pressure hull of USS Halibut, the cruise missile submarine turned super-sneaky special forces boat. 2/5
Toon number three was the Soviet Project 661 (Nato "Papa") class cruise missile submarine. A real "golden fish" this one, being the fastest submarine ever built (and I wish I could find a higher rez version of the plans) 3/5
Read 5 tweets

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