Naval Historywith Dr. Alex

Topic

I-400 Class Submarines

Japanese Second World War aircraft-carrying submarines built to launch long-range seaplane strikes.

Also searchable as I 400 Submarine, I-400 Class, I-400 Class Submarine, I-400 Submarines, I400 Class.

Related time notes

  1. Bruships 244: Naval History Questions Answered Live...
    1:41:30Choosing a Second World War submarine by theaterQ&A
  2. What if the Royal Navy's Aircraft Carrier HMS Hermes had sisters in the 1920s? (Patreon Live)
    1:31:01When does an aircraft-carrying submarine make sense?Q&A
  3. Top/Bottom 5 inventions/adaptations of RN ships that came from the ships themselves...(Patreon Live)
    1:40:47Why submarine aircraft carriers gave up their key advantageNotable Point
  4. What would the World's Major Navys look like in 1950 if WWII didn't happen? (Live)
    1:44:49Carrier submarines compete with patrol range and regional specializationNotable Point
  5. What happens if the X-1 Cruiser Submarine becomes genesis not a dockyard queen?
    43:50France builds around Surcouf while Japan reaches toward the I-400Chapter
  6. Bruships 210: Naval History Questions Answered Live...
    3:52:25Azur Lane's G14 carrier and I-400 submarine referencesQ&A
  7. Bruships 192: Naval History Questions Answered Live...
    3:06:25Which wartime submarine programs misused scarce resources?Q&A
  8. Bruships 188: Naval History Questions Answered Liven & Birthday Party...
    4:07:33When designs reverse their paper reputationQ&A
  9. Bruships 185: Naval History Questions Answered Live...
    2:39:37I-200 fleet submarines versus I-400 strike boatsQ&A
  10. Bruships 184: Naval History Questions Answered Live...
    4:54:51An uncertain I-500 successor to the I-400Q&A
  11. Seaplane Tenders: An Earlier Answer to the Battle of the Atlantic?
    2:03Global trade routes met an infrastructure bottleneckChapter
  12. Built in Australia: HMAS Castlemaine & the Bathurst Class Corvettes
    57:09An I-400 minelayer counterfactual tests national mine defensesNotable Point
  13. Three Days from Pearl Harbor: The World if the Kido Butai is Spotted on the 4th of December...
    1:35:09The likeliest outcome: withdrawal and a rearmament raceChapter
  14. Questions, Flower Class & the Essay Competition: First 9 of the 36hr Historiophon Part 1/4
    6:34:50Early I-400 operations would pull American escorts homeQ&A
  15. Bruships 161: All you need are Kallax, Shelves are all Books need... Naval History Questions & Chat!
    37:49I-400 grew from two decades of submarine-aircraft experienceNotable Point
  16. Bruships 161: All you need are Kallax, Shelves are all Books need... Naval History Questions & Chat!
    1:14:41The Seiran was a competent aircraft trapped in a failing strategyQ&A
  17. Bruships 161: All you need are Kallax, Shelves are all Books need... Naval History Questions & Chat!
    1:57:41Starling's escort group is a poor opponent for I-400Q&A
  18. Bruships 161: All you need are Kallax, Shelves are all Books need... Naval History Questions & Chat!
    2:41:42An I-400 raid on Washington would be strategically disastrousQ&A
  19. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    0:00Size imposed an unusual diving constraintNotable Point
  20. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    0:58The I-400 as a surprise strike submarineChapter
  21. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    7:28The I-400 as the ultimate cruiser submarineChapter
  22. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    15:26Why the I-400 had to be so largeChapter
  23. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    18:24Three aircraft forced stability compromisesNotable Point
  24. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    19:05Why timing mattered more than noveltyNotable Point
  25. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    21:58Singapore could support a trans-Pacific raid cycleNotable Point
  26. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    32:44What if eighteen I-400s were ready in 1941?Notable Point
  27. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    34:59A large hull could support minelayer and tanker variantsNotable Point
  28. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    35:31Hull, trim, mine protection, and acoustic coatingChapter
  29. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    38:21Impressive gun and radar figures met physical limitsNotable Point
  30. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    39:43A manual hangar-door backup encoded hard-won experienceNotable Point
  31. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    42:44Two boats could not create strategic pressureNotable Point
  32. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    46:29The planned attack on the Panama CanalChapter
  33. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    53:49Late-war missions that never reached their targetsNotable Point
  34. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    55:08Surrender became a struggle over submarine technologyNotable Point
  35. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    56:39The unexecuted biological-warfare proposalNotable Point
  36. Japan's I-400 Class: Waste of Resources, Idea to Soon or Idea to late?
    1:06:41The verdict: a good idea executed too lateChapter
  37. Check Campaign 21: UAD has updated & to Learn it's new ways I started another British Campaign
    2:01:03Submarine minelaying as strategic disruptionNotable Point
  38. Bruships 140 - Patreon Suggestions, Some Interesting Books (Hopefully) & Lots of Naval History Qs!
    3:32:29I-400-launched V-1 attacks would divert American defensesQ&A
  39. Twelve Odd Ships
    40:50Prestige kept cruiser submarines attractive after testingNotable Point
  40. Bruships(New Years Eve): Naval History Questions answered till the Bru runs out!
    1:23:20Using I-400 submarines as minelayersQ&A
  41. Patreon 62: What If The French Navy in 1940 Fought On?
    2:13:13Would Germany seek Japanese naval design help?Q&A
  42. Questions & Answers on Naval History till the Bru Runs Out 2
    30:34Building and employing the I-400 submarinesQ&A
  43. Questions & Answers on Naval History till the Bru Runs Out 2
    47:40How Japan might employ the I-400 classQ&A
  44. Bruships 80: Books From Travels
    47:55Sending I-400 submarines to France in 1944Q&A
  45. Karl Dönitz (on his Birthday) - how capable an Admiral was he?
    51:21What Germany might have done with an I-400-type submarineQ&A
  46. Crackpot Schemes or Good Ideas (Non-Churchill) – The Comment Questions...
    1:29:21Cruiser submarines traded agility for range and payloadQ&A
  47. Minesweepers, Torpedo Boats & Gunboats – the ‘Littleships’ of the big war
    2:04:25A long-range submarine alternative to the I-400 classNotable Point
  48. Bru Ships Episode 2a: Book Reviews/Q&A
    1:22:41Submarines adapted for landing troopsQ&A