Data Base: Japanese Aircraft Engines

Shinpachi · Oct 23, 2020

Good job, Sir.

mack8 · Jan 4, 2023

Just wanted to extend my thanks to Shinpachi for this fantastic thread, it went a long way to clarify the histories of Mitsubishi and Nakajima engines of WW2, alongside the book Japanese aero engines 1910-1945. In case i missed it, is there any clear info regarding the bore and stroke of the Kawasaki Ha-9 engine? I've seen conflicting data, different sources say either it was similar to the BMW VI or it was smaller.

tomo pauk · Jan 4, 2023

mack8 said:
In case i missed it, is there any clear info regarding the bore and stroke of the Kawasaki Ha-9 engine? I've seen conflicting data, different sources say either it was similar to the BMW VI or it was smaller.

Japanese Wikipedia says: 160 x 170mm, capacity 42.4L.
BMW VI: 160 x 190/196mm (one vs. another bank), capacity 46.9L.

JOVE23 · Jan 28, 2023

Shinpachi-san,

Are there significant external differences between Kinsei 43, 44, and 54? I ask because Pearl Harbor Aviation Museum acquired a D3A2 for restoration. They claim to have acquired an engine from Papua New Guinea, but it will likely be in poor condition and need to be restored. I know there is a Kinsei 44 at the Air and Space Museum, could they use a 44 to restore a possible 54?

I'd personally like to see them restore the D3A2 as a D3A1, but that's a story for another thread!

Shinpachi · Jan 28, 2023

Probably no problem as the diameter is same and the length seems to be shorter.

Dimentions: length/diameter in milimeters/weight
Kinsei 54 : unknown/1218/640kgs
Kinsei 44 : 1646/1218/560kgs

For reference,
Kinsei 51 : 1660/1218/642kgs

JOVE23 · Jan 28, 2023

Thank you! It remains to be seen what condition their engine is in. I have asked but received no reply yet.

Aurum · Jun 3, 2023

tomo pauk said:
Japanese Wikipedia says: 160 x 170mm, capacity 42.4L.
BMW VI: 160 x 190/196mm (one vs. another bank), capacity 46.9L.

Quite a strange statement!? In this case it should be a NEW engine but not a version of BMW VI!

tomo pauk · Jun 3, 2023

Aurum said:
Quite a strange statement!? In this case it should be a NEW engine but not a version of BMW IV!

What specific statement in my post is strange?

Aurum · Jun 5, 2023

tomo pauk said:
What specific statement in my post is strange?

I mean that stroke is definitely different then it was of BMW VI. It should be other parameters of combustion

reoinu · Jul 10, 2023

Do you mean that the stroke 160mm is defferent from that of BMW9?
Noted values are not of BMW, but Ha9 which was modified from original BMW9 by Kawasaki.

Kawasaki produced two version of BMW9, one was "Kawasaki BMW9" of original bore and stroke and another was "Ha9" of shortened stroke.
Kawasaki intended to obtain more power by combination of shorter stroke and high roration.
In text of Japanese Wikipedia, this change of stroke is not noted.

JOVE23 · Aug 27, 2023

Here is the engine that came with the Pearl Harbor Val. Can anyone identify it?

Shinpachi · Aug 27, 2023

JOVE23 said:
Here is the engine that came with the Pearl Harbor Val. Can anyone identify it?

View attachment 735575

View attachment 735576

It looks like a Mitsubishi Kinsei model 54 engine for the Aichi D3A2 dive bomber as some fuel injection tubes are seen on the cylinders.

Bretoal2 · Aug 28, 2023

Shinpachi said:
It looks like a Mitsubishi Kinsei model 54 engine for the Aichi D3A2 dive bomber as some fuel injection tubes are seen on the cylinders.

Cam system, including its case and pushrods tubes, is very similar to the Gnome-Rhône 14 K/N. And likely valves angle, rather acute.

But obviously cylinders are more compact !

cherry blossom · Aug 29, 2023

As far as my poor eyes can distinguish in the images, there is an interesting difference between the Kinsei and the GR 14N as the pushrods emerge from the casing in pairs but each of the pairs in the Kinsei seems to operate the valves of a single cylinder whereas in the GR 14N one of the pair goes to a front row cylinder and the other goes to a rear row cylinder.

Bretoal2 · Aug 30, 2023

cherry blossom said:
As far as my poor eyes can distinguish in the images, there is an interesting difference between the Kinsei and the GR 14N as the pushrods emerge from the casing in pairs but each of the pairs in the Kinsei seems to operate the valves of a single cylinder whereas in the GR 14N one of the pair goes to a front row cylinder and the other goes to a rear row cylinder.

You can click on each image to expand it. And you will see that on the Kinsei, wich is a two-row radial engine as G&R, "one of the pair goes to a front row cylinder and the other goes to a rear row cylinder" just like the 14N.

Texnuk · Mar 27, 2024

And what is known about the Hitachi GK2 Tempu 12 engine?

Shinpachi · Mar 27, 2024

Texnuk said:
And what is known about the Hitachi GK2 Tempu 12 engine?

Tenpu 12 is known as Type 95 300hp engine but was not formally adopted for the Ha-series like Ha-12(Shinpu/Type 95 150hp), Ha-13(Tenpu/Type 95 350hp) or Ha-13-ko(Tenpu-5kai/Type 98 450hp) of Hitachi.

Texnuk · Mar 27, 2024

This engine was on a marine scout that I'm making now. But there is no information about the engine at all. Is there anywhere I can see him?

Shinpachi · Mar 27, 2024

Texnuk said:
This engine was on a marine scout that I'm making now. But there is no information about the engine at all. Is there anywhere I can see him?

There is no information because it was experimental model.
This Ha-13-ko(Tenpu-5kai/Type 98 450hp) is the closest one.

Source: Type 98 450hp Engine Manual

Wurger · Mar 27, 2024

Data Base: Japanese Aircraft Engines

Colonel

Airman 1st Class

Creator of Interesting Threads

Airman

Colonel

Airman

Airman 1st Class

Creator of Interesting Threads

Airman 1st Class

Recruit

Airman

Colonel

Senior Airman

Attachments

Senior Airman

Senior Airman

Airman

Colonel

Airman

Colonel

Siggy Master

Users who are viewing this thread

Similar threads