I managed to find two different converted 6" Coast Gun cases that were used as Catapult rounds to launch aeroplanes from ships by UK and Australia during WW2.
1. Catapult No1 11 by MF AN 1938. Converted B 111* 1901 case. 369mm long and a plug primer.
2. Catapult No1* by RL 1935. Converted KN 111 1900 case. 368mm long ? Primer is No11 Mk11 by ME Australia so maybe used here.
Both cases were flared at the mouth for vases and shortened. I still need to find a nice 6" coast gun case with the mouth cut-outs someday.
Who has seen an 8" Catapult steel case as mentioned in the 1945 Naval Ammunition Handbook B.R.932 (1945)?
I thought that 6" was the largest case diameter used by UK during both wars. Zoom in for clearer picture of markings.




1. Catapult No1 11 by MF AN 1938. Converted B 111* 1901 case. 369mm long and a plug primer.
2. Catapult No1* by RL 1935. Converted KN 111 1900 case. 368mm long ? Primer is No11 Mk11 by ME Australia so maybe used here.
Both cases were flared at the mouth for vases and shortened. I still need to find a nice 6" coast gun case with the mouth cut-outs someday.
Who has seen an 8" Catapult steel case as mentioned in the 1945 Naval Ammunition Handbook B.R.932 (1945)?
I thought that 6" was the largest case diameter used by UK during both wars. Zoom in for clearer picture of markings.



