British Ordnance Collectors Network
This is a sample guest message. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
Japanese Fuze ID needed
- Thread starter RTFREY
- Start date
J
John D. Bartleson Jr.
Guest
BOUGAINVILLE
Well-Known Member
A-2(b) ARMY MECHANICAL IMPACT NOSE FUZE
TYPE - ARMY Air force mechanical impact nose fuze with instantaneous action.
BOMBS IN WHICH USED
15 Kg Anti-personnel- Army type
50 Kg Incendiary (phosphorous rubber pellets)
50 Kg Type 92 Gas bomb
COLOUR - Natural BRASS.
OVERALL LENGTH - 2.25 inches (with vanes), (less gaine).
OVERALL WIDTH - 1.67 inches.
MATERIAL OF CONSTRUCTION - Brass except steel spring and steel firing pin.
POSITION & METHOD OF FIXING IN BOMB - The flue is screwed into the nose of the bomb and tightened with a spanner wrench. A grub-screw is usually present in the nose also.
COMPONENTS OF EXPLOSIVE TRAIN - This fuse has an Army gaine with the primer in the gaine. The striker enters the gaine, pierces the primer and sets off the exploder assembly.
FUZES LIKELY TO BE FOUND WITH - Probably none; may be fitted to bomb with an Army tail fuze.
THREADS - 1-5/32 in. diameter 13 TPI
DESCRIPTION (See diagram)
The fuze body (6) is machined out of the one piece. The striker spindle (5) is retained in the body by a shoulder and is restricted to vertical movement only by a stud sliding in a groove in the fuze body. Screwed into its base is a striker needle (7) splayed to a point. The vane boss (vane cap)(1), to which two-bladed vanes (2) are attached, screws on to the end of the spindle and is prevented from being jammed against the fuze body by two studs (3), one on the body and one on the vane cap. The U-shaped transit safety fork (4) is withdrawn on loading into the bomb rack.
A steel creep spring (8) keeps the striker needle off the detonator after the boss has fallen off. A striker guide plug (9) and a detonator (11) screw into the base of the fuze body.
ACTION
On release, the vanes rotate 10 times and the boss falls off. The distance between the striker point and detonator is approx 3 mm which means that the fuze is armed after 5 revolutions of the vanes.
Upon impact with the ground, the arming spindle is pushed in against the action of the spring and the striker pierces the primer which is located in the gaine.
TYPE - ARMY Air force mechanical impact nose fuze with instantaneous action.
BOMBS IN WHICH USED
15 Kg Anti-personnel- Army type
50 Kg Incendiary (phosphorous rubber pellets)
50 Kg Type 92 Gas bomb
COLOUR - Natural BRASS.
OVERALL LENGTH - 2.25 inches (with vanes), (less gaine).
OVERALL WIDTH - 1.67 inches.
MATERIAL OF CONSTRUCTION - Brass except steel spring and steel firing pin.
POSITION & METHOD OF FIXING IN BOMB - The flue is screwed into the nose of the bomb and tightened with a spanner wrench. A grub-screw is usually present in the nose also.
COMPONENTS OF EXPLOSIVE TRAIN - This fuse has an Army gaine with the primer in the gaine. The striker enters the gaine, pierces the primer and sets off the exploder assembly.
FUZES LIKELY TO BE FOUND WITH - Probably none; may be fitted to bomb with an Army tail fuze.
THREADS - 1-5/32 in. diameter 13 TPI
DESCRIPTION (See diagram)
The fuze body (6) is machined out of the one piece. The striker spindle (5) is retained in the body by a shoulder and is restricted to vertical movement only by a stud sliding in a groove in the fuze body. Screwed into its base is a striker needle (7) splayed to a point. The vane boss (vane cap)(1), to which two-bladed vanes (2) are attached, screws on to the end of the spindle and is prevented from being jammed against the fuze body by two studs (3), one on the body and one on the vane cap. The U-shaped transit safety fork (4) is withdrawn on loading into the bomb rack.
A steel creep spring (8) keeps the striker needle off the detonator after the boss has fallen off. A striker guide plug (9) and a detonator (11) screw into the base of the fuze body.
ACTION
On release, the vanes rotate 10 times and the boss falls off. The distance between the striker point and detonator is approx 3 mm which means that the fuze is armed after 5 revolutions of the vanes.
Upon impact with the ground, the arming spindle is pushed in against the action of the spring and the striker pierces the primer which is located in the gaine.
Attachments
BOUGAINVILLE
Well-Known Member
Olafo is correct, it is definitely A-2(d). In was in a rush this morning with only a few minutes before rushing out the door to work. Now its evening I have more time. Below is the required information on the A-2(d) fuze as well as a few more bits on the A-2(b) fuze for a comparison. The bevel at the bottom of the vanes clearly points to this fuze being A-2(d).
I don't have the splurge on it as I do for the A-2(b) but the attached files tell all. Also try this link to download a PDF file I produced of a Manual on Japanese Bomb Fuzes.
http://www.bocn.co.uk/vbforum/downloads.php?do=file&id=478
http://www.scribd.com/doc/57872443/TM-E9-1984-Enemy-Bombs-Fuzes-Section-VII-Japanese-Fuzes
Cheers,
BOUGAINVILLE
I don't have the splurge on it as I do for the A-2(b) but the attached files tell all. Also try this link to download a PDF file I produced of a Manual on Japanese Bomb Fuzes.
http://www.bocn.co.uk/vbforum/downloads.php?do=file&id=478
http://www.scribd.com/doc/57872443/TM-E9-1984-Enemy-Bombs-Fuzes-Section-VII-Japanese-Fuzes
Cheers,
BOUGAINVILLE
