The Ma-Dan (マ弾) is a special incendiary shell developed by the Imperial Japanese Army.
A key feature is that it lacks a fuse; instead, it detonates due to the frictional heat generated upon impact. It was developed primarily to puncture fuel tanks and ignite the fuel inside.
The 7.7mm Ma-101 was the first to be developed, followed by 12.7mm, 20mm, 30mm, and finally 37mm versions.
It was recently announced that updates to improve bomber survivability are coming, making it even more important to accurately target pilots, engines, and “fuel tanks.”
Given this, it is believed that the “Ma-Dan” will play a crucial role in the game as well.
This thread will compile information on ammunition corresponding to the Ma-Dan (including similar naval ammunition). Since there are many unknowns, please feel free to share any information you have in the comments.
Ma-101
- Gun
Type 89 Fixed MG, Type 89 Swivel MG, Te-1, Te-4 - Types of Ammo in the Game
IAI - Projectile Mass
10.7 g (U.S. Military Survey Data) - Explosive Type
Tip : RDX/PETN, Inside : RDX/PETN - Explosive Mass
Tip : ? g, Inside : ? g - Incendiary Mass
None
7.7mm MG Incendiary Ammunition Model 2 (IJN)
- Gun
Type 92 Swivel MG, Type 97 Fixed MG - Types of Ammo in the Game
IAI - Projectile Mass
9.8 g - Explosive Type
Tip : RDX/PETN, Inside : RDX/Aluminum - Explosive Mass
Tip : 0.24 g, Inside : 0.26 g - Incendiary Mass
None
Ma-104
- Gun
Type 98 Swivel MG, Type 1 Swivel MG (IJA) - Types of Ammo in the Game
AI? - Projectile Mass
11.64 g (U.S. Military Survey Data) - Explosive Type
Tip : RDX/PETN, Inside : RDX/PETN - Explosive Mass
Tip : ? g, Inside : ? g - Incendiary Mass
None
7.9mm MG Incendiary Ammunition Model 2 (IJN)
- Gun
Type 1 Swivel MG (IJN) - Types of Ammo in the Game
AI? - Projectile Mass
? g - Explosive Type
Tip : RDX/PETN, Inside : RDX/Aluminum - Explosive Mass
Tip : 0.26 g, Inside : 0.70 g
(Inside: 0.70 g is an unusually high amount, so this may be a typographical error.) - Incendiary Mass
None
Ma-102
- Gun
Ho-103 - Types of Ammo in the Game
HEF-I - Projectile Mass
32.918 g (U.S. Military Survey Data) - Explosive Type
Tip : RDX/PETN, Inside : RDX/PETN - Explosive Mass
Tip : 1.65 g, Inside : 1.05 g - Incendiary Mass
1.05 g
13mm MG Incendiary Ammunition Model 2 (IJN)
- Gun
Type 3 Fixed MG - Types of Ammo in the Game
IAI - Projectile Mass
47.2 g - Explosive Type
Tip : RDX/PETN, Inside : RDX/Aluminum - Explosive Mass
Tip : 1.0 g, Inside : 1.3 g - Incendiary Mass
None
Ma-201
- Gun
Ho-1, Ho-3 - Types of Ammo in the Game
(None) - Projectile Mass
109.4 g (U.S. Military Survey Data) - Explosive Type
PETN (U.S. Military Survey Data) - Explosive Mass
4.25 g (U.S. Military Survey Data) - Incendiary Mass
8.79 g (U.S. Military Survey Data)
Ma-202
- Gun
Ho-5 - Types of Ammo in the Game
(None) - Projectile Mass
79.4 g (U.S. Military Survey Data) - Explosive Type
PETN (U.S. Military Survey Data) - Explosive Mass
3.12 g (U.S. Military Survey Data) - Incendiary Mass
8.79 g (U.S. Military Survey Data)
Ma-301
- Gun
Ho-155 - Types of Ammo in the Game
(None) - Projectile Mass
? g
(Empty Projectile Mass : 244 g) - Explosive Type
PETN (guess) - Explosive Mass
? g - Incendiary Mass
? g
Ma-351
- Gun
Ho-203 - Types of Ammo in the Game
(None) - Projectile Mass
? g
(Empty Projectile Mass : 407 g) - Explosive Type
PETN (guess) - Explosive Mass
? g - Incendiary Mass
? g
Ma-352
- Gun
Ho-204 - Types of Ammo in the Game
(None) - Projectile Mass
? g
(Empty Projectile Mass : 407 g) - Explosive Type
PETN (guess) - Explosive Mass
? g - Incendiary Mass
? g
Sources
日本陸軍航空武器 機関銃・機関砲の発達と変遷, 光人社NF文庫, 2021-1-24, ISBN978-4-7698-3197-6
岡村純, 「航空技術の全貌（下）」, 日本出版協同株式会社, 1955
昭和１９年３月 飛行長主管兵器（第２類）説明資料（１）
航空機用１２．７粍機関砲弾薬「マ１０２」検査法
兵政技第１３５号 「ホ１５５」マ３０１ 「ホ２０３」マ３５１ 「ホ２０４」マ３５２ 昭和２０年１月１８日
T and I No. 13, 3 January 1945. Report No. 3-e(1), USSBS Index Section 6
CINCPAC Bulletin 85 45, Japanese Projectiles Vol 1
Manual on Japanese aircraft, TAIC No. 1, July 1945. Report No. 9-a(43), USSBS Index Section 6
Chief Inspector of Ammunition Technical Report No 24
Japanese ammunition data, 20 MM, 1 July 1945. Report No. 12-b(51), USSBS Index Section 6
