Pascal Casanova is a friend, passionated by the First World War, living in Verdun area. He is a very talented battlefield photograph, but also an expert in Computer Assisted Design. He lets us take advantage of his skill by designing detailed 3D rebuildings pictures of WW1 fuses and shells.
Some words from him, explaining his method to me :
The basic data (parts and functionning) are mainly coming from texts and 2D schematics of the German Artillery Manual of 1918.
I take note of the external dimensions of my fuses collection, as well as some other infos coming from the internet, mainly from your website.
The 2D schematics show the thread diameter. I use that measure to determine an approximative value of the drawing scale. This scale is then used to recompute the dimensions of all the other parts.
I would like to say that I am sometimes forced to imagine the shape of some parts, because I do not have access to all the needed drawings. Any additional information would be welcomed to give some potential improvement to my works.
All the redesigned parts are then assembled one per one to rebuild the fuse. Once the assembly is done, I define a surface aspect that matches the fuse material, to give it a look as close as possible to the reality.
When the fuse is made with all its parts, it is possible to create transparent views, cut views, or even to realize some animated sequences.
The following pictures collection is an extract of his creations.
Interesting ancestors of the numerous German WW1 fuzes, the Gr Z 80, Gr Z 82, and Gr Z 82 (Kp) are rendered by the magic of the author's 3D know-how. For more info, have a look to this website page dedicated to the GrZ82 fuzes.
Family picture of the HZ14 series fuses, with, from the left to the right, the HZ14 fb, the HZ14 vorst, and the HZ14 vorst fliehb. For more details on these marks, have a look on the HZ14 fuses webpage.
And now let the magic happen : this HZ14 vorst fuse becomes transparent, and let us see the activation mechanism specific to the German percussion fuses !
Family picture of the KZ14 fuses series, showing two of the marks of that puse made in different materials (steel aluminum, brass), as well as a cut view showing the security system with compacted gunpowder grain. More details in the KZ14 fuses page.
The Gr Z 04 fuse is another item that can be seen quite often on the former battlefields. On the right, it is assembled with a mighty 210 mm explosive shell. See more details on the Gr Z 04 page.
The transparent view shows the two percussion mechanisms, with and without delay.
Another spectacular rendition showing a common German fuze, the Gr Z 14 under a new vision : a lot of people often . On oublie souvent que les fusées étaient peintes entièrement ou partiellement. Plus de details sur la page fusées Gr Z 14.
The EK Z 17 fuse is more rarely encountered on the former battlefields nowadays. Moreover, the surviving items are often heavily damaged and corroded, and the percussion rod is often missing. More details on the EKZ 17 fuses page.
The arming and percussion sequence of the fuze :
Fuze at rest, the percussion rod is blocked by the centrifugal rod pressed by a spring
Fuze during the flight, the shell spin pushes the centrifugal lock away, freeing the percussion rod movements
Fuze during the flight, zoom on the safety spring at the bottom of the percussion rod, preventing it from being pushed back by the wind
Fuse hitting its objective, the percussion rod compresses the safety spring, and the percussion pins ignites the starter.
The Gr Z 17 fuze cannot be observed easily nowadays. It was an instant action fuze dedicated mainly to the 150mm and 210mm heavy howitzers, for high explosive or gaz shells.
Its inertia arming system and its percussion rod system is brilliantly shown in this impressive picture.
The Dopp Z 86 is the ancestor of most of the German time and percussion fuses found during WW1. Pascal Casanova not only recreated 3D views of that old fuze, but he also wrote a interesting article on it in the Nr 6 edition of 'Tranchées Magazine' (jul-aug-sept 2011)
The Dopp Z 92 fuse is relatively often found nowadays on the former battlefields, most of the time still assembled with the ton part of a schrapnell shell. But it never shines like this one ! More details on the Dopp Z 92 fuse page.
The HZ05 fuze can be found easily in the WW1 battlefields in all of its variants, but most of the time in badly corroded condition since its time rings were made in aluminium. This virtual view let us imagine its aspect. More details on these fuzes on this website page HZ05 Gr fuzes and HZ05 Schr fuzes.
Designed for the universal shells, the KZ 11 fuze is one of the most complex German time and percussion fuzes. More details on this model on this website related page KZ 11 fuze.
The elogated time and percussion LKZ 11 fuse is for me one of the most beautiful ones of the German arsenal of WW1. This reconstitution is just convincing me a little more in my feeling. More details on this fuze on the page fuze LKZ 11 Gr.
This 30mm time and percussion fuze Dopp Z S 43 , graduated from 0 to 43 seconds is pretty rare, and was principally used with German Navy guns (such as the famous 15cm SKL 40), or coast guns. This reconstitution is therefore even more precious.
The bottom fuse Bd Z 10, preferred German fuse for the 150, 210 and 280 mm calibers, existed in two main marks, screwed either on a short detonator, with 25 grammes of picric acid, or on a long one, with 100 grammes of picric acid. It was then respectively named Kz Bd Z 10 or Lg Bd Z 10. For more details please go to the Bd Z 10 fuse page.
This time the fuse transparent view, here in its long LgBdZ10 mark, shows a very complex internal mechanism.
The bottom fuse Bd Z f Spgr m.K. equipped the shells of the famous long range 380 mm heavy guns, as well as the 280, 240, and some 210 mm shells. There was a mark with a short delay, named Bd Z f Spgr m.V.u.K..
The arming and percussion sequence of the fuse :
Fuse at rest, the centrifugal locks are blocked by the locking rod
Fuse at the shot departure, the locking rod is pushed ahead by the pressure of the combustion gases on a rear membrane
Fuse during the flight, the centifugal locks are pushed away
Fuse hitting its objective, the percussion pin hits the starter.