Above Fort de Loncin, february 99, 2 x 15 cm gun cupola.
The design was practically the same as that of the 12 cm cupola differences are given below
| Specifications | ||
| Gun : | length : | 3,75 m |
| diameter : | 150 mm | |
| weight : | 3065 kg | |
| elevation : | max. + 25° | |
| min. - 2° | ||
| Cupola : | total weight : | 354000 kg |
| Ammunition : | weight : | varied from 29,5 to 39,3 kg |
| range : | between 2,2 km and 8,3 km | |
| muzzle velocity : | between 179 en 520 m/sec |
Fort de Loncin, September 1914, 2 x 15 cm gun cupola.