{"product_id":"original-japanese-wwii-imperial-japanese-navy-type-97-b-6-rail-initiator-tail-fuze-and-type-93-impact-fuze-with-bring-back-documents-inert","title":"Original Japanese WWII Imperial Japanese Navy Type 97 (“B-6”) Rail Initiator Tail Fuze and Type 93 Impact Fuze with Bring Back Document - Inert","description":"\u003cp\u003eOriginal Item: Only One Group Available. Prior to World War II, there were no formally trained bomb or mine disposal personnel, but the need became apparent when in 1939, the British navy dismantled the first German magnetic mine that had washed up on the shore of Shoeburyness, England. In 1941, the U.S. Naval Mine School was established at Naval Gun Factory in Washington, D.C., and subsequently, the Bomb Disposal School was established. The first U.S. casualty in mine disposal was in 1942, when Ensign John M. Howard was killed when he attempted to dismantle a booby-trapped German magnetic submarine-laid moored mine. About 20 trained bomb and mine disposal personnel, to include Howard, were killed in action during WWII.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThese are completely INERT examples of WWII Japanese Aerial Bomb fuzes, and are in compliance with the current BATF standards on inert ordnance. Not Available For Export.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Fuzes In This Lot:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Type 97\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe type 97 tail fuze, which has a U.S. designation of “B-6”, is a simple impact design used in the Japanese 31 Kg practice bomb. On release from the aircraft, the safety pin is removed and the fan assembly rotates 12 times and falls free, leaving the striking mechanism held back by a spring. On impact, inertia causes the striker to move against the spring and pierce the primer.\u003c\/p\u003e\n\u003cp\u003eThe following information was found in a 1945 US Army publication manual:\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eJAPANESE\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eB-6(A)\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eNavy Mechanical Impact Tail Fuze\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eData\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eCOLOR:\u003c\/strong\u003e Brass\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eOVERALL LENGTH:\u003c\/strong\u003e 3.6 inches.\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eOVERALL WIDTH:\u003c\/strong\u003e 1.25 inches. Vane width: 2.3 inches.\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eMATERIAL OF CONSTRUCTION:\u003c\/strong\u003e Brass except steel striker point and creep spring.\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003ePOSITION \u0026amp; METHOD OF FIXING IN BOMB:\u003c\/strong\u003e Screwed into tail fuze pocket and tightened with spanner wrench.\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eCOMPONENTS OF EXPLOSIVE TRAIN:\u003c\/strong\u003e Not known.\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eFUZES LIKELY TO BE FOUND WITH:\u003c\/strong\u003e None.\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eDELAY TIMES:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eTHREADS:\u003c\/strong\u003e 1-3\/64 in. diameter 20 TP\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDESCRIPTION:\u003c\/strong\u003e The upper portion of the body acts as a guide for the arming spindle. The lower portion of the body contains the light creep spring. The striker point is screwed into the end of the spindle. The lower portion of the fuse has a combination spanner ring and detonator cup screwed to it. Around the striker point, four air vents are drilled. Two vents are also located on the striker collar. These vents allow the striker to move against the primer on impact without any cushion effect caused by the air in the striker channel. The arming vane assembly has eight vanes\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOPERATION:\u003c\/strong\u003e On release from the aircraft, a U-shaped safety fork is withdrawn from the two holes in the arming spindle. The vanes rotate twelve times and fall free, leaving the striker held back by the light creep spring. The arming spindle is prevented from rotating by a small guide pin which fits in a groove in the lower portion of the fuze body. On impact, inertia causes the striker to move against the spring and to pierce the primer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType 93 150MM Infantry Mortar Impact Fuze\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Type 93 150 mm infantry mortar was a medium infantry mortar used by the Imperial Japanese Army during World War II. The Type 93 designation was given to this mortar as it was accepted in the year 2593 of the Japanese calendar (1933).\u003c\/p\u003e\n\u003cp\u003eRelatively little is known about this mortar other than it being a muzzle-loading smoothbore mortar which was fired by a lanyard instead of being drop fired. The Type 93 may have been a transitional model and only produced in small numbers. It is described as being meant for motor transport due to its weight but it lacked a wheeled carriage for towing and was difficult to move.\u003c\/p\u003e\n\u003cp\u003eThis round was sent home by United States Navy Reservist \u003cstrong\u003eD. W. Christenson\u003c\/strong\u003e, a \u003cstrong\u003eMineman 2nd Class\u003c\/strong\u003e who was apart of \u003cstrong\u003eBomb and Mine Disposal Team #3\u003c\/strong\u003e and sent back a group of deactivated fuzes and ordnance. Included is the original bringback document mentioning this piece which unfortunately does not have a his name present on it. We have uploaded scans of the complete set of documents from the whole set as well (not included).\u003c\/p\u003e\n\u003cp\u003eComes ready for further research and display. \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e","brand":"Original Items","offers":[{"title":"Default Title","offer_id":40444174336069,"sku":"ONSV22IDM19","price":325.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1524\/1342\/products\/ONSV22IDM19__01.jpg?v=1670010159","url":"https:\/\/www.ima-usa.com\/products\/original-japanese-wwii-imperial-japanese-navy-type-97-b-6-rail-initiator-tail-fuze-and-type-93-impact-fuze-with-bring-back-documents-inert","provider":"International Military Antiques","version":"1.0","type":"link"}