R. Meyer J. Köhler A. Homburg Explosives

137 Firing Current
combustion chamber. This type of combustion is produced by coating
all other surfaces with a non-flammable layer. In such rockets long,
combustion times (10 minutes or more) at a nearly constant thrust can
be achieved.
Fallhammer
mouton de choc
Fallhammer instruments are used to determine the W Impact Sensitivity
of explosives.
Ferrocene
Ferrocen, Bis-cyclopentadienyl-Eisen; ferrocène
empirical formula: C10H10Fe
molecular weight: 186.0
energy of formation: +214.9 kcal/kg = +899.2 kJ/kg
enthalpy of formation: +199.0 kcal/kg = +832.6 kJ/kg
oxygen balance: –223.6%
Ferrocene is a combustion-modifying additive especially for W Composite
Propellants.
Firedamp
Schlagwetter; grisou
Firedamp is an explosive mixture of marsh gas (methane, CH4) with
air. These mixtures are explosive at normal temperatures and pressures,
and the explosion is propagated over large distances if the
mixture contains 5–14% methane. A methane-air mixture containing
8.5–9.5% methane is prescribed for official tests of permissibles. The
danger of explosion is greatest in this concentration range.
W Permitted Explosives.
Firing Current
Zündstrom; courant de mise à feu
An electric current of recommended magnitude to sufficiently energize
an electric blasting cap or a circuit of electric blasting caps.