Rptd 01/Nov/2017 A6M3 is equipped with the wrong cannon

[[email protected] 1,411]

Since there was an incompleteness in the contents of the bug report I posted in the past, I will fix it and submit again.

@KnightoftheAbyss, Thank you for confirmation and advice.

https://forum.warthunder.com/index.php?/topic/382873-1711121-a6m3-equipped-cannon-does-not-match-graphics-and-performance/&tab=comments#comment-7223376

 

 

1. This problem occurs in A6M3. It occurs in all game modes.

 

2. A6M3 is equipped with wrong version of cannon.
    In historical fact, the A6M3 was equipped with the  20 mm type 99 mk 1 cannon.
    However, in the game 20 mm type 99 mk2 cannon is equipped.
    The graphic is short barrel mk 1 cannon, but the data is mk 2.

 

 20 mm type 99 cannon

  Length

• Mk 1: 1,331 mm
• Mk 2: 1,890 mm

 

  Muzzle velocity

• Mk 1: 600 m/s
• Mk 2: 750 m/s

3. I checked the problem by looking at the X-ray display.

    3D graphic is mk 1 of short barrel, but data display is mk 2.

    Type 99 mk 1 The difference between cannon and mk 2 is the length of the barrel.

    Because Mk 2 is a long barrel, the muzzle velocity is fast.

　 However, although the A6M3  in the game are short barrels, but muzzle velocity is fast.

 

A6M3

Spoiler

 

 

 

4. Correct cannon of A6M3 from 20 mm type 99 mk 2 cannon to mk 1.

 

Source

(1). Historical documents

 

This is the A6M3 user manual. It is a comparison of A6M3 and A6M2.
In the comparison of firearms, it is written only that it increased the magazine capacity to 100 round.
It is evidence that there was no change to mk.2.

Spoiler

 

Extracts from a Handling Manual on the A6M3 (Zeke), Nagoya Aeroplane Engineering Works, Mitsubishi Heavy Industries Co. Ltd. July 1942. Page 9.

JACAR (Japan Center for Asian Historical Records) Ref.A03032271200

https://www.digital.archives.go.jp/DAS/contents/pdf/S48B0501260000/0204.pdf

https://www.jacar.archives.go.jp/das/meta-en/A03032271200

 

 

According to IJN firearm performance table, Muzzle velocity is 600 m / s for mk 1, 750 m / s for mk 2.

Spoiler

 

Weapon disgorge table, Imperial Japanese Navy, Taiwan Naval Air Group, Donggang Airfield, January 1946. Page 3.

JACAR (Japan Center for Asian Historical Records) Ref.C08010604100

https://www.jacar.archives.go.jp/aj/contents/pdf/C08/C08010604100.c0660109002.01hikiwatashi_009.1141_01.pdf

https://www.jacar.archives.go.jp/das/meta-en/C08010604100

 

 

(2). Books

 

 A6M3 was equipped with the  20 mm type 99 mk 1 cannon.

Spoiler

 

The Pacific War which can be understood with firearms and weapons,  Written by Pacific War Study Group, ISBN-13: 978-4537251623, Page 155

 

 

Type 99 mk 1 The difference between cannon and mk 2 is the length of the barrel. Because Mk 2 is a long barrel, the muzzle velocity is fast.

Spoiler

 

Japanese military aircraft dictionary 1910 - 1945 Navy version, Written by Shigeru  Nohara, ISBN-13: 978-4871496544, Page 182 

 

 

Client Log

2017_10_24_12_09_36__10032.clog

Edited October 30, 2017 by *tester188

[KnightoftheAbyss 3,385]

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