From 100 to 500 fragments were obtained by bursting a 12-centimeter steel service shell (1.21 kg.) with a ... Skoda rapid-fire gun against a 30 mm. steel plate , with a 60 grm. charge of ammonal and a small black powder priming. Perfectanbsp;...
|Title||:||Civil Aeronautics Board Reports|
|Author||:||United States. Civil Aeronautics Board|