Mitsubishi A7M Reppu ("Sam")

[topspeed3]

Hi! I can't find any specifications about 16-shi carrier fighter.
I find only 17-shi carried fighter specifications.
Source:My No.2 Bible

Did it see any combat action ?

 

[Arjen]

No A7M aircraft saw combat.
Japanese Secret Projects by Edwin M Dyer III, Crécy 2014, says the following aircraft were completed:
- Two A7M1 prototypes. Construction of four other A7M1 prototypes was started, but halted when performance of the first two was disappointing.
- Seven A7M2 prototypes, of which #4, #6 and #7 were airworthy at the end of the war. The unfinished #6 A7M1 prototype was used as the basis of the #1 A7M2 prototype. A7M2 prototype #2 was damaged in a crash landing, #1, #3 and #5 A7M2 prototypes were damaged on the ground by roaming US fighters and fighter-bombers.
- One A7M2 Model 22 production aircraft, airworthy at the end of the war.

Construction of the single A7M3 and A7M3-J prototypes was never completed.

 

[lastdingo]

German aviation gas was poor as well, and I doubt that Japanese aircraft specs were from test flights with substandard fuel.

I correct myself:

View: https://www.youtube.com/watch?v=NJP7iouMwsE

 

[airman]

No A7M aircraft saw combat.
Japanese Secret Projects by Edwin M Dyer III, Crécy 2014, says the following aircraft were completed:
- Two A7M1 prototypes. Construction of four other A7M1 prototypes was started, but halted when performance of the first two was disappointing.
- Seven A7M2 prototypes, of which #4, #6 and #7 were airworthy at the end of the war. The unfinished #6 A7M1 prototype was used as the basis of the #1 A7M2 prototype. A7M2 prototype #2 was damaged in a crash landing, #1, #3 and #5 A7M2 prototypes were damaged on the ground by roaming US fighters and fighter-bombers.
- One A7M2 Model 22 production aircraft, airworthy at the end of the war.

Construction of the single A7M3 and A7M3-J prototypes was never completed.

So, based on United States Strategic Bombing Survey , it was ordered 30 A7M2 and monthly production for 50 aircraft .

 

[zzy2001]

Mitsubishi A7M1 fuselage stress analysis.

View attachment 614028

do you know where does this picture comes from?

 

[zzy2001]

Good news：The ORIGINAL A7M Reppu's design manual had been publicate online fully by Japan Aeronautic Association (JAA).
You can download them in the following website: https://www.aero.or.jp/isan/archive/sone-collection/sone_yoshitoshi_collection.htm.
The link for the design manual's pdf itself was: https://www.aero.or.jp/isan/archive/sone-collection/A7M2_handling-mannual_draft.pdf
There are some pictures that I had saved:

 

[handrew]

does anyone know the A7M wing profile ? in many source it says MAC361, i have been looking for it for a long time, but can't found it.

 

[blackkite]

Hi!
Inner wing : laminar flow wing, Outer wing : normal wing.
Source : ISBN978-4-7698-1490-0, Super Zreo fighter Repuu.

 

[blackkite]

Please show me MAC361.

 

[handrew]

Please show me MAC361.

一般財団法人　日本航空協会　航空遺産継承基金　アーカイブ　曽根嘉年コレクション

I see it from that source, in book a7m2 manual handling, it is say MAC361, the wing section just like what u sent. But i cant find the wing profil, the coordinate of A7M air foil. I wanna to draw the air foil, so i need the coordinate

 

[blackkite]

MAC means mitsubisi aircraft corporation?

 

[handrew]

MAC means mitsubisi aircraft corporation?

Yes it is.. like the A6M zero plane, it has airfoil type MAC118, for the A7M it has MAC361 airfoil type

 

[handrew]

Does anyone know a7m wing profile? I wanna draw it accurately , still cant find the exact profile

 

[blackkite]

Hi!
From same source.

 

[blackkite]

Hi!

View: https://www.youtube.com/watch?v=KECVch6quFo

View: https://www.youtube.com/watch?v=y8xjfyD_Mqo

 

[blackkite]

Hi!

 

[handrew]

Where

Hi!

Do you have detailed tail drawing?

 

[blackkite]

Hi! Best I have.
Source : ISBN978-4-7698-1490-0, Super Zero fighter Reppu.

 

[blackkite]

Hi!
Japan investigated and studied the captured P-47.

"Secret Records of Japanese Military Captured Aircraft" states that on February 27, 1945, a P47D (belonging to 5AF/35FG/40FS) that was shot down by a Type 4 fighter in Taiwan was captured in almost its original condition.

 

[Skyraider3D]

Hi!
Inner wing : laminar flow wing, Outer wing : normal wing.
Source : ISBN978-4-7698-1490-0, Super Zreo fighter Repuu.

Very interesting note about the inner wing being of a laminar flow type.
Do you know if any extra precautions were taken to preserve the laminar flow, like puttied rivets and panel lines or special paint coatings?

 

[blackkite]

Good question! I will check this.

 

[Justo Miranda]

With the technology and construction systems of the time it was impossible to obtain a wing surface capable of retaining the laminar flow, not even the Americans managed to do it with the Mustang, although it is true that they managed to considerably reduce drag but without approaching the expected theoretical performance.

It would have been even more difficult to achieve good results with mass production and the enormous shortcomings of Japanese industry in 1945... remember the structural failures in the landing gears of the latest Hayate manufacturing series.

 

[iverson]

With the technology and construction systems of the time it was impossible to obtain a wing surface capable of retaining the laminar flow, not even the Americans managed to do it with the Mustang, although it is true that they managed to considerably reduce drag but without approaching the expected theoretical performance.

It would have been even more difficult to achieve good results with mass production and the enormous shortcomings of Japanese industry in 1945... remember the structural failures in the landing gears of the latest Hayate manufacturing series.

I suspect that, even today, laminar flow is not really achievable, quite aside from manufacturing issues. The unavoidable surface imperfections that occur in real-world operation--bugs, dirt, rain, small dents, scratches, etc.--probably create too much turbulence.

 

[Skyraider3D]

There’s a reason glider pilots spend as much time polishing as they do flying