Delay fuze

Other problems of the airmen were solved at Picatinny. In 1943, the introduction of skipbombing brought a special request. Because of the low altitude at which the bombing plane had to fly, a bomb with a delay fuze was required to permit the plane sufficient time to get away from die effective range of the explosion. In many instances,bombs were to be dropped from as low as 25 feet. Again, Picatinny came up with the answer a fuze which would delay detonation of the bomb eight to eleven seconds. 

Navy Electric Delay Fuze Detonator Mk35 Mod l described in Ref 23, p 5-51 and shown here in Fig 1-59 is more powerful than Navy Delay Fuze Primer Mkl 15, due to the addition of 0.75 g PETN to the base chge. Otherwise, its construction is similar to Mkl 15 Fuze Primer, described in Ref 23, p 5-50 and also in this Section under "Delay Fuze Primers "(See Fig 1-62)... 

Section 4, Part F d) Gasless Delay Fuze Primers... 

For example, "Electric Delay Fuze Primer Mkll5 " listed in Ref 23, p 5-50 and shown here as Fig 1-62, contains, among other ingredients, a base charge and there is no reason (in our opinion) why it should not be called detonator. 

Fuze, Delay or Delay Action. Any impact fuze incorporating a means of delaying its action after contact with the target. Delay fuzes are classified according to the length of time of delays. There are Fuze, Long Delay Fuze, Medium Delay and Fuze, Short... 

Fuze, Hand Grenade. A pyrotechnic delay fuze initiated by release of a lever which in turn permits a striker to impinge on a primer. The output of the fuze is designed to ignite or detonate a filler of a hand grenade... 

Fuze, Long Delay. A delay fuze for use in bombs, in which the fuze action is delayed for a relatively long period of time, from minutes to days (Ref 40a, p 78). Ohatt (Ref 17, p 126) gives delay time 0.5 to 70 sec... 

Fuze, Medium Delay. A type of delay fuze, expecially for bombs, in which the fuze action is delayed for a period of time between that of short delay and long delay fuzes, normally 4 to 15 seconds... 

Fuze, Selective Delay. A delay fuze which permits a selection from two or more functioning delay times... 

Fuze, PD M81. It is a superquick and 0.05 sec delay fuze, similar in contour and mechanism (except the booster) to M51 fuzes. 

Types 90, 93 and 100 Instantaneous-Short-Delay Fuzes for 81, 90 150-mm projs (pp 401-404)... 

Type 92 Small Short-Delay Fuze for 57-mm Tank projs (pp 416-17)... 

Japanese Army Tail Bomb Fuzes, pp 137-44 151-53 [Type 12-Year instantaneous fuze B-l(a), Type 1 15-second delay fuze B-l(b), Type 92 instantaneous fuze B-4(a), Types B-5(a), B-7(a) and B-8(a)]... 

B.T. Fedoroff et al, "Dictionary of Russian Ammunition and Weapons ", PATR 2145(1955) OTS PB 159927(1955). Figs on the sheet betw pp 2 3 include Rus Detonator MD-2, Pressure Fuze MV-5, Delay Fuze ChMV-10, Pull Fuze MUV and... 

CA 42, 5230(1948) [Gasless delay fuze elements consisting of finely divided Ni (prepd by volatilizing Hg amalgam) and an oxidizing agent, such as Mn dioxide or alkali nitrate, chlorate or perchlorate]... 

Delay fuze compns contg Ba peroxide 32-42, Te 18-48 Se 16-50%. Such mixts... 

A.B. Schilling, "Examination of German, Instantaneous and Long Delay Fuze, ELE AZ 55A , PATR 1581 (Nov 1945)... 

Delayed-Action Bomb. Chido bakudan Delayed-Action Fuze Delay Fuze. Chido shinkan... 

Type 1 15-Second Delay Fuze B-l(b) (pp 138—39) Type 92 Tail Fuze B-4(a) (p 140)... 

Type 1 Long-Delay Fuze C-3(a) (pp 144—47) Aerial-Burst Fuzes D-l(a) D-l(b) (pp 147—49) Type 1 Aerial-Burst D-5(a) Combination Fuze D-5(b) (pp 149-51)... 

Fusie retardie — Delay fuze Fusie de signalisation — Signal flare or rocket Refs 1) A.M. Patterson, "A French- English Dictionary for Chemists , J. Wiley, NY (1921), 16 2) Anon, "Italian and French... 

The detonator shell was then crimped just above the upper aid of the delay sleeve in order to provide a seal for the "Mipolam sealing plug, described in Ref 4, p Ger 113 R Note 3 Accdg to Ref 1, pp 5—6, the gasless delay powder (also called "gasless delay fuze powder) consisted of about 705S Sb pdr... 

Electric Delay Primers (Military) (US). Two of such electric delay primers Gasless Electric Delay Fuze Primer, Mkll5 and Experimental Delay Fuze Primer are described in Vol 4, pp D868 D869, Figs 1-62 1-63... 

Small fragmentation or antipersonnel bombs equipped with two folding wings which rotate and arm the fuze as the bomb descends. Designed to be dropped in clusters, the bombs are frequently fitted with antidisturbance or delay fuzes (See Fig)... 

Bombs, Delayed Action. Bombs having a delay fuze which may vary from a fraction of a second to several days after impact. Bombs having short delay fuzes are used to penetrate targets before exploding bombs having medium delay fuzes are used in low-altitude bombing to allow the plane to move away from the point of impact before... 

Bombs, Time. Aerial(or other) bombs that may be set to expl sometime after being droppedfor planted). Short-delay fuzed bombs are not usually classified as time bombsfsee Bomb, Delayed Action)... 

It was concluded, at that time, that replacement of Al by B in military expls showed no advantages over std expls. Boron has been used in the development of some gasless delay fuze compns and in pyrotechnic mixts for flares incendiary bombs (Ref 3). Werbel(Ref 2a) proposed Ba chromate/boron 95/5 mixt as delay compn 90/10 mixt as an igniter. Taschler Jones(Ref 5) have detd the e-lectrostatic sensitivity of barium chromate/boron compns. The performance of boron expls is described by Mader(Ref 4)... 

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