French culverin (circa 1520)

Paulo Monteiro

 

Description of a french bronze culverin presenting the coat-of-arms of Francis the 1st (1515-1547), recovered at Monte Brasil, Terceira Island, Azores, by the Grupo de Arqueologia Subaquática, July 1996, in 130 fsw (40 meters).
 
 

1. General characteristics

 

 Lenght from button of cascable to face of muzzle - 302 cm
 Lenght from base ring to face of muzzle - 284 cm
 Lenght from base ring to axe of trunnions - 123 cm
 Trunnions - diameter 8,4 cm
 Distance from trunnionface to trunnionface - 34 cm
 Lenght of trunnions - 7 cm
 Cylinder, bore - diameter 7,5 cm.
 

2. Cascable

 Lenght of button - 9 cm
 Button -diameter  9,8 cm
 Lenght of button astrogal - 1,2 cm
 Button astragal - diameter 11,8 cm
 Lenght of cascable neck - 4,2 cm
 

3. Breech

 

3.1. Breech mouldings

 Lenght of neck fillet - 1,2 cm
 

3.2. Base mouldings

 Lenght of base ring - 1,8 cm
 Base ring -  diameter 24,4 cm
 Lenght of base ring fillet - 0,6 cm
 Lenght of base ring ogee - 2,1 cm
 

3.3. Vent field

 Vent - diameter 3,3 cm.
 Cross-section of the octogonal faces at the vent field - 10 cm Detail of the coat of arms of Francis I, in the later stages of the conservation of the culverin
 Total lenght of the coat of arms - 16,2 cm
 

4. Muzzle

 Muzzle astragal - 1 cm.
 

4.1. Muzzle neck

 Cross-section of the octogonal faces at the muzzle - 6 cm
 Muzzle - diameter 15 cm
 

4.2. Head

 Muzzle face - diameter 19 cm.
 Mouth - diameter 7,5 cm
 

4.2.1. Muzzle mouldings

   Muzzle fillet - 0,8 cm                                                                                                                                 Detail of the coat of arms of Francis I, 
   Muzzle fillet - diameter 16,1 cm                                                                                                  in the later stages of the conservation of the culverin
   Muzzle ogee - 2,4 cm
   Muzzle ring - 1,5 cm
   Muzzle ring -  diameter 19 cm
 
 
 

 Monte Brasil. Red dot shows the place of recovery.

Monte Brasil. Red dot shows the place of recovery.

 

 

Lifting of the culverin into Angra pier.

Lifting of the culverin into Angra pier.