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ID on a 30x113B
- Thread starter US-Subs
- Start date
Eggburt1969
Well-Known Member
A sectional image (photograph) and sectional diagram of the round is within the book 'Les canons de bord à barillet 30 mm DEFA', by Philippe Ballarini.
Going by the book, the 30-550-OPIT F5970 is a second generation armour-piecing incendiary tracer (API-T) round. OPIT being the French designation for API-T, which is presumably short for 'Obus Perforant Incendiaire Traceuse', but don't quote me on it.
The book shows the F5970 OPIT round's projectile as being an API-T design, which has a false aluminium alloy ogive, steel main body, and a rear tracer assembly.
Internally a hardened steel-core is present within most of the nose, with an incendiary charge sitting behind it and within the steel body. The seemingly screwed-in tracer assembly holds the pressed-in tracer composition charge.
Here are some example some link found when searching for the book.
www.aerobiblio.com
Going by the book, the 30-550-OPIT F5970 is a second generation armour-piecing incendiary tracer (API-T) round. OPIT being the French designation for API-T, which is presumably short for 'Obus Perforant Incendiaire Traceuse', but don't quote me on it.
The book shows the F5970 OPIT round's projectile as being an API-T design, which has a false aluminium alloy ogive, steel main body, and a rear tracer assembly.
Internally a hardened steel-core is present within most of the nose, with an incendiary charge sitting behind it and within the steel body. The seemingly screwed-in tracer assembly holds the pressed-in tracer composition charge.
Here are some example some link found when searching for the book.
Les canons de bord à barillet 30 mm DEFA – Aérobibliothèque
Les canons de bord à barillet 30 mm DEFA - Contrairement à la plupart des ouvrages en autoédition qui se reconnaissent généralement assez vite à leur mise en page qui transpire l’amateurisme et aux déséquilibres dans leur organisation, le livre Les canons de bord à barillet 30 mm DEFA donne...
www.aerobiblio.com