Gunpowder, double base

Akardite II is an effective -> Stabilizer for double base gunpowders... 

The basis data for internal ballistic calculations are thus obtained (also -> Ballistic Bomb - Burning Rate). As an example for the calculation of a double base gunpowder ) composition... 

Of these, the most successful appeared in 1887 when Alfred Nobel patented a nitrocellulose propellant plasticised with nitroglycerine. Known as a double-base propellant, it is virtually smokeless, with a very high specific impulse as compared to gunpowder. Single-base propellants were developed in 1865 and 1890 by Schultz and Vieille respectively and these took the form of gelatinised nitrocellulose for use in firearms and mortars. 

The superiority of double-base propellant as compared to gunpowder is clearly reflected in the properties of the two products. For example the heat of reaction is about 900 as opposed to 700 calories g while the volume of gas produced is around 950 in comparison to 370 cm atm g at STP. The flame temperatures are listed as 3200 K and 2700 K respectively, while the specific impulse is about 1800 for smokeless propellant and bOONskg for gunpowder. 

C/89. A Ger designation for a double—base proplnt similar in compn to an Italian Ballistite. It was also known as RGP/89 (Rauchloses Geschiitzpulver, 1889, which means Smokeless Gunpowder, 1889)... 

Akardite I serves as - Stabilizer for gunpowders, in particular for -> Double Base Propellants. 

Centralite I, II and III are used as -> Stabilizers in gunpowders, especially in nitroglycerine powders (- Double Base Propellants). It is insoluble in water, but soluble in organic solvents. 

Nitrocellulose high performance gun propellant [military grade gunpowder double based)... 

---