IJA Landing Operation Ships with slopes at the stern

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ShindenKai
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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 15 Aug 2022 07:41

Absolutely great stuff Fontessa! Thx!

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Re: IJA Landing Operation Ships with slopes at the stern

Post by Eugen Pinak » 16 Aug 2022 07:16

fontessa wrote:
12 Aug 2022 08:27
Picture of 1st class Transport...


fontessa
Thank you. So many great details of the upper deck equipment.

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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 20 Aug 2022 23:53

A nice video featuring various R/C warships including a 1/100 scratch-built No.1 Class Transport! @ 4:18-5:12
https://www.youtube.com/watch?v=CSRoT3aqnWQ

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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 10 Jun 2023 11:21

Found some drawings of more ships with stern ramps.

Patrol Boat No.2 (Ex-Nadakaze), Namikaze and Shiokaze. Unfortunately, I've been unable to find any actual pics of them.

The post war Namikaze pic, has the same style rear mast as well as the elevated 25mm gun platforms shown on the drawing (w/o the guns, cuz post war).
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Re: IJA Landing Operation Ships with slopes at the stern

Post by fontessa » 11 Jun 2023 18:58

哨戒艦 回天.jpg
The above may be a hypothetical modification. Their TROMs don't mention such modifications. They were actually modified to carry two Daihatsu and 250 land battle soldiers for landing operations.

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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 11 Jun 2023 22:03

fontessa wrote:
11 Jun 2023 18:58
哨戒艦 回天.jpg

The above may be a hypothetical modification. Their TROMs don't mention such modifications. They were actually modified to carry two Daihatsu and 250 land battle soldiers for landing operations.

fontessa
Yes, I do not know for certain. But, as we've seen with other stern ramp ships those types of rails have been used to launch: Daihatsu/Shohatsu, Kaiten and Kō-hyōteki midget subs.
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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 12 Jun 2023 02:21

Found some more stuff..

Patrol Boat No.34, (Ex-Sutsuki) allegedly had a stern ramp added...AND it also lost 80' of its bow in a collision (its replacement bow was very similar to that of the Amatsukaze) the following two drawings conflict each other. The drawing below seems to show TWO pairs of launching rails
IJN Patrol Boat No.34, Ex-Sutsuki, stern ramp.jpg

Here's a YT video that seems to show the simplified replacement bow of No.34
https://www.youtube.com/watch?v=2bDyfSLC8G0

Here's another vid that seems to show the same truncated bow...but the stern is different from both drawings, seems to narrow to the width of ONE pair of launching rails, with possibly ONE pair of rails barely visible (hard to say with all the over-growth) https://www.youtube.com/watch?v=L0SXdN1e52Y

This second drawing, is drawn from a sunken wreck.
Found here:https://thorfinn.net/2018/04/03/sutsuki ... oat-no-34/

Critical details are the hoisting winch and the A-frame hoist which would've been used to haul the bow of the Daihatsu/Shohatsu up and over the stern. Strange, because it would've been very awkward to launch any boat in that configuration... also the side roll-off depth-charge racks...
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Re: IJA Landing Operation Ships with slopes at the stern

Post by fontessa » 13 Jun 2023 00:55

ShindenKai wrote:
11 Jun 2023 22:03
fontessa wrote:
11 Jun 2023 18:58
哨戒艦 回天.jpg

The above may be a hypothetical modification. Their TROMs don't mention such modifications. They were actually modified to carry two Daihatsu and 250 land battle soldiers for landing operations.

fontessa
Yes, I do not know for certain. But, as we've seen with other stern ramp ships those types of rails have been used to launch: Daihatsu/Shohatsu, Kaiten and Kō-hyōteki midget subs.
They were 海防挺 Kaibotei whose production was decided in April 1945. They were planned to carry Kaiten, but nothing was completed by the end of the war. There were two types of 海防挺.
No.1 and No.2: Steel Hull. Carried Kaiten x 2
No.101 ~ No.157: Wooden Hall. Carried Kaiten x 1

fontessa

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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 13 Jun 2023 06:51

fontessa wrote:
13 Jun 2023 00:55
ShindenKai wrote:
11 Jun 2023 22:03
fontessa wrote:
11 Jun 2023 18:58
哨戒艦 回天.jpg

The above may be a hypothetical modification. Their TROMs don't mention such modifications. They were actually modified to carry two Daihatsu and 250 land battle soldiers for landing operations.

fontessa
Yes, I do not know for certain. But, as we've seen with other stern ramp ships those types of rails have been used to launch: Daihatsu/Shohatsu, Kaiten and Kō-hyōteki midget subs.
They were 海防挺 Kaibotei whose production was decided in April 1945. They were planned to carry Kaiten, but nothing was completed by the end of the war. There were two types of 海防挺.
No.1 and No.2: Steel Hull. Carried Kaiten x 2
No.101 ~ No.157: Wooden Hall. Carried Kaiten x 1

fontessa
Yes, thank you Fontessa.

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fontessa
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Re: IJA Landing Operation Ships with slopes at the stern

Post by fontessa » 14 Jun 2023 21:45

ShindenKai wrote:
12 Jun 2023 02:21
Found some more stuff..

Patrol Boat No.34, (Ex-Sutsuki) allegedly had a stern ramp added...AND it also lost 80' of its bow in a collision (its replacement bow was very similar to that of the Amatsukaze) the following two drawings conflict each other. The drawing below seems to show TWO pairs of launching rails
IJN Patrol Boat No.34, Ex-Sutsuki, stern ramp.jpg


Here's a YT video that seems to show the simplified replacement bow of No.34
https://www.youtube.com/watch?v=2bDyfSLC8G0

Here's another vid that seems to show the same truncated bow...but the stern is different from both drawings, seems to narrow to the width of ONE pair of launching rails, with possibly ONE pair of rails barely visible (hard to say with all the over-growth) https://www.youtube.com/watch?v=L0SXdN1e52Y

This second drawing, is drawn from a sunken wreck.
Found here:https://thorfinn.net/2018/04/03/sutsuki ... oat-no-34/

Critical details are the hoisting winch and the A-frame hoist which would've been used to haul the bow of the Daihatsu/Shohatsu up and over the stern. Strange, because it would've been very awkward to launch any boat in that configuration... also the side roll-off depth-charge racks...
There were two types of Patrol Ships - Type No.1 (PT-1 and PT-2 and Type No.31 (PT-31 ~ PT-39 and PT-46).
viewtopic.php?f=65&t=261822&p=2386358&h ... f#p2386314
PT-31 ~ PT-39 were modified ex-Momi class type 2nd class destroyers.
Details are;
PT-31 ex-Kiku: Sunk by air raid at Palau on 30 March 1944.
PT-32 ex-Aoi: Sat down at Wake on 23 December 1941.
PT-33 ex-Hagi: Sat down at Wake on 23 December 1941.
PT-35 ex-Tsuta
PT-34 ex-Susuki: Sunk by air raid at Truk on 3 July 1944. -
PT-35 ex-Tsuta: Sunk by air raid at Solomon
PT-36 ex-Fuji: Survived the war.
PT-37 ex-Hishi: Sunk by an Artillery battle with 4 US destroyers on 24 January 1942.
PT-38 ex-Yomogi: Sunk by USS Atule torpedo attack at Bashi Strait on 25 November 1944.
PT=39 ex-Tade: Sunk by USS Seawolf torpedo attack East of Taiwan on 23 April 1942.
*******
PT-46 ex-Yugao: Sunk by USS Greenling torpedo attack off Irozaki on 10 November 1944.

A belief description of the Wake Landing Operation in which PT-32 and PT-33 sat down.
viewtopic.php?f=65&t=261822&hilit=patro ... 0#p2388540
There are two theories about "which is which". Ships with such ramps have few photographs due to secrecy. The photo below shows PT-31 after the ramp was added. The other one is the PT-32 sat down in the Wake Operation.

31号哨戒艇.jpg

32号哨戒艇 擱座.jpg

fontessa
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Re: IJA Landing Operation Ships with slopes at the stern

Post by Berend » 20 Jun 2023 18:34

Shiokaze final configuration postwar at Kure found on Twitter (@saunders_aki). The added slope maybe similar to the one used on the Matsu destroyers.

Regards,

Berend.
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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 20 Jun 2023 21:50

Berend wrote:
20 Jun 2023 18:34
Shiokaze final configuration postwar at Kure found on Twitter (@saunders_aki). The added slope maybe similar to the one used on the Matsu destroyers.

Regards,

Berend.
Good find, thank you. That Shiokaze has a pair of rails on both sides.

There appears to be another vessel with a sloped stern just out of frame at the top of the pic.

That pic inspired me to do a quick search for pics of ships in Kure after WW2.

Found another pic, it shows at least three other sloped stern ships, as well as the one that is just out of frame in the picture you posted (the discolored hull side is clearly visible), unfortunately it's full stern is just out of view, again.

The I-402 is again visible as are four Ha-201 class small subs. Many other un-ID'd ships are also visible.
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fontessa
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Re: IJA Landing Operation Ships with slopes at the stern

Post by fontessa » 20 Jun 2023 23:01

Berend wrote:
20 Jun 2023 18:34
Shiokaze final configuration postwar at Kure found on Twitter (@saunders_aki). The added slope maybe similar to the one used on the Matsu destroyers.

Regards,

Berend.
Thanks for the interesting photo. It seems she could carry 4 Kaiten. I-402 is visible in the foreground.

回天 汐風.jpg

fontessa
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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 21 Jun 2023 00:31

fontessa wrote:
14 Jun 2023 21:45

There were two types of Patrol Ships - Type No.1 (PT-1 and PT-2 and Type No.31 (PT-31 ~ PT-39 and PT-46).
viewtopic.php?f=65&t=261822&p=2386358&h ... f#p2386314
PT-31 ~ PT-39 were modified ex-Momi class type 2nd class destroyers.
Details are;
PT-31 ex-Kiku: Sunk by air raid at Palau on 30 March 1944.
PT-32 ex-Aoi: Sat down at Wake on 23 December 1941.
PT-33 ex-Hagi: Sat down at Wake on 23 December 1941.
PT-35 ex-Tsuta
PT-34 ex-Susuki: Sunk by air raid at Truk on 3 July 1944. -
PT-35 ex-Tsuta: Sunk by air raid at Solomon
PT-36 ex-Fuji: Survived the war.
PT-37 ex-Hishi: Sunk by an Artillery battle with 4 US destroyers on 24 January 1942.
PT-38 ex-Yomogi: Sunk by USS Atule torpedo attack at Bashi Strait on 25 November 1944.
PT=39 ex-Tade: Sunk by USS Seawolf torpedo attack East of Taiwan on 23 April 1942.
*******
PT-46 ex-Yugao: Sunk by USS Greenling torpedo attack off Irozaki on 10 November 1944.

A belief description of the Wake Landing Operation in which PT-32 and PT-33 sat down.
viewtopic.php?f=65&t=261822&hilit=patro ... 0#p2388540
There are two theories about "which is which". Ships with such ramps have few photographs due to secrecy. The photo below shows PT-31 after the ramp was added. The other one is the PT-32 sat down in the Wake Operation.
fontessa
Thank you for the extra info Fontessa. The stern of Patrol Boat No.31 seems to match that of the ship in this https://www.youtube.com/watch?v=L0SXdN1e52Y (@ 4:32-5:06), to be clear I'm not saying the sunken hulk in the vid is No.31, just that the style of stern ramp + rails is the same.
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Re: IJA Landing Operation Ships with slopes at the stern

Post by ShindenKai » 27 Jun 2023 09:59


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