Straight Dynamite

Propanediol dinitrate Commercial. Barab (Ref 4) patented liq expls contg varying amts of 1,2- and 1,3-Propanediol Dinitrates. These mixts were claimed to be as powerful as, but less sensitive than NG. The product was examined by the US BuMines and found to make up a 40% straight Dynamite that compared favorably with 40% straight NG Dynamite Ref J. Barab, USP 1371215 (1921)... 

Fig 4 Shook velocity V versus S and average velocity P versus S for propagation by influence in air for a straight dynamite and 65/35 tetrytol... 

Modified Influence (Propagation) Test. Gawthrop (Ref 1) and others used a modified gap test to determine the relative ability of a shielded donor charge to transfer detonation over an air gap to an acceptor charge. Clark (Ref 2) also used this method for the determination of the gap in the transmission of detonation from a small charge (0.5 to 2g) of HE to a cartridge of 40% straight dynamite... 

Clark La Motta (Ref 7) showed that LOX made with gas black or lamp black are more sensitive to impact than the standard Bureau of Mines 40% straight Dynamite. Impact sensitivity increased when small amounts of iron oxides, aluminum dust or ferro-silicon were added to the LOX. Impact sensitivity also increased as absorbent particle size was reduced. As the oxygen evapd, impact sensitivity, as expected, decreased... 

Frozen Blasting Gelatin. Blasting Gelatin (See Vol 2, p B211-R) exists as a yellowish translucent, elastic mass of density about 1.63. It is very difficult to freeze. When frozen, it loses its elasticity and flexibility, and becomes a hard white mass. Unlike Guhr Dynamite and Straight Dynamite, it is more sensitive to shock when frozen than when in a soft and unfrozen state Refs 1) Naoum, NG (1928), 311-12 2) Davis (1943), 343... 

Fugacity Determinations of the Products of Detonation were determined by M.A. Cook for PETN, RDX, LNG, Tetryi ana 60% Straight Dynamite, by employing the equation of state... 

Nobel developed gelatinous dynamite in 1875 by making a jelly from the dissolution of a collodion-type nitrocotton in NG, producing a more powerful explosive than the straight dynamite and one that proved to be safer. Later ammonium nitrate was also used in dynamite, which made it even safer and less expensive to produce. 

The rock explosives used in the U.S.A. are similar in composition to those used in Europe. In addition to blackpowder (with Chilian saltpetre) dynamites with the composition tabulated below are used extensively. The oldest are the straight dynamites designated by percentage expressing the content of nitroglycerine. The latter is not gelatinized but only adsorbed by woodmeal and the like. 

U.S.A. STRAIGHT DYNAMITES (/ EXPRESSES THE RELATIVE POWER OF THE EXPLOSIVE)... 

Blasting Gelatin (Get Swiss) French Verge German Straight Dynamites Safety Ex plosives... 

Class II. Nongelatinous (Powdery) Nitroglycerin Explosives with an Active Base. These expls were invented by A. Nobel in. 1869- The base can be either combustible or explosive. They are known as Active Dope Dynamites or Straight Dynamites (Ref 62, p639)... 

Class II. Nongelatinous Dynamites with an Active Base-, known as Straight Dynamites. 

A slightly different compn for 40% Straight Dynamite is given in Table 14 of Ref 62, p6 38 Ref 66, p7—83, which is reproduced here as Table HI, together with count (densiry) of lJ4 by 8 inch cartridges per 50 lb case ... 

In the manufacture of Ammonia Dynamites, the same procedure is followed as described here under "Nongelatinous Dynamites with an Active Base", known as "Straight Dynamites"... 

Seismograph 60 Percent "Hi-Velocity Gelatin is a Straight Dynamite which has been specially formulated to provide maximum resistance to desensitization by high hydrostatic heads (See also Ref 63, p359)... 

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