About this detail of the Tiger
S-mine launchers were added to the Tiger shortly after its introduction. From December 1942, even before the launch tubes became available, brackets and electrical wiring for them were were fitted to all new Tigers. The launch tubes became available in January 1943.
The Bovington Tiger (chassis # 250122) was shipped from the factory with the welded brackets and wiring, but no launchers. Some Tigers had already been fitted with launchers at this time, so we must assume a shortage of the launchers.
This diagram shows the bracket that an S-mine launcher required. It consisted of two strips of 10mm thick steel, each with 2 threaded holes, welded to the roof of the hull.
Here is one of the brackets on the Bovington Tiger, during restoration. This bracket is adjacent to the radio operator's hatch. Notice that it is angled at exactly 45 degrees to the direction of travel.
The short protruding tube near to the bracket is the sleeve through which the trigger wire emerged from the hull. This sleeve was required to be waterproof because the Tiger was (at that time) submersible.
This diagram shows how a launcher tube would fit to that bracket.
The standard Tiger carried five S-mine launchers; two near the front corners of the roof, as shown already; two at the rear corners of the roof; and one on the left side, half way along the roof. There was no corresponding launcher on the right side because the antenna was there and would not benefit from an explosion immediately adjacent.
This is the left side middle bracket. The trigger wire emerges to the side of the launcher, and the launcher tube aims out sideways.
Command Tigers (Befehlstiger) had an extra antenna here, and so they did not have this fifth bracket.
At the rear corners of the hull, the S-mines posed a threat to the vehicle. Air outlet gratings occupied the outer corners of the roof; shrapnel from an S-mine, if it were to enter them, could damage the cooling fans. It was necessary to place the mine launchers at the extreme outer corners of the Tiger so that the mines would explode as far as possible from these gratings.
Therefore two arms were attached to each rear corner of the hull, forming the two portions of a bracket for a launcher. They held the launcher clear of the hull, as this photo shows.
Because of the adjacent Feifel air filters, it was necessary for one of these arms to protrude out from the hull side. But the Tiger's hull already filled the width allowed for rail transport. Therefore this protruding arm, like the Tiger's wheels and fenders, could be removed to set up the tank for rail transport.
This photo shows the left rear corner of the Tiger at Bovington Museum. The removable arm is missing; the other arm is not removable. At extreme right is the Feifel air filter.
This plan diagram of the same area shows how the S-mine arm is up against one of the Feifel support blocks. The two arms have the necessary 4 bolt holes for an S-mine launcher.
This diagram shows both the side view and the rear view of the arms. Like the launcher itself, the arms have a small hole that is apparently intended to hold an electrical wire.
A square nut was welded at the forward end of the fixed arm. It was intended that the removable arm could be stored by bolting it into this nut. This plan view shows how the arm might be positioned when stored.
This detail from a photo shows the arm stored on the nut, at the right rear corner of a Tiger.
Photographs show that some Tiger crews made creative use of these S-mine arms. Instead of dismantling the system and storing it as intended, they would fix the entire launcher and removable arm to the fixed arm, in any of several possible configurations.