The original Mark 1 (designated Mother) had a low centre of gravity and long track length, able to grip muddy ground and cross trenches. Sponsons on the hull sides carried two naval 6-pounder guns. There were two Hotchkiss machine guns in the sponsons and two removable guns for the front and back.
The hull was undivided internally; the crew sharing the same space as the engine. The environment inside was extremely unpleasant, being contaminated with carbon monoxide, fuel and oil vapours from the engine and cordite fumes from the weapons as ventilation was inadequate. Temperatures inside could reach 50 °C (122°F). Entire crews lost consciousness inside the tank or became violently sick when again exposed to fresh air. Being a tank crew in these tanks was tantamount to a death sentence.
To counter the fumes inside and the danger of bullet splash or fragments and rivets knocked off the inside of the hull, the crew wore helmets with goggles and chainmail masks. Gas masks were standard issue as well.
The side armour of 8 mm initially made them largely immune to small arms fire, but could be penetrated by recently developed armour-piercing K bullets.
A direct hit on the roof by an artillery or mortar shell could cause the fuel tanks (which were placed high in the front horns of the track frames either side of the drivers’ area,to burst open. Incinerated crews were removed by special Salvage Companies, who also salvaged damaged tanks. They were forbidden to speak about this aspect of their work with still living tank crews.
Steering was difficult; controlled by varying the speed of the two tracks.Because of the noise and vibration, early experiments had shown that radios were impractical, so lamps, flags, semaphore, coloured discs, and the carrier pigeons became standard equipment.
A requirement was found for two types of armament, so Mark Is were armed either with 2 x 6 pounder guns and four machine guns called “Male” or two Vickers machine guns instead of the 6 pounders and called “Female”. The Mark V had more power (150 bhp) from a new Ricardo engine. Use of Wilson’s epicyclic steering gear meant that only a single driver was needed. Four hundred were built, 200 each of Males and Females. Several were converted to Hermaphrodites by swapping sponsons to give a single 6-pounder gun for each. These are also sometimes known as “Mark V Composite”.
The Mark V was a late participant in the First World War. It was first used in the Battle of Hamel on 4 July 1918 when 60 tanks contributed to a successful assault by Australian units on the German lines.
Tank Tracks can rotate forward and backward, independantly or together.
Left and Right Turrets rotate
Left and right Turret Guns raise and Lower
Machine guns rotate (twist) and Elevate
Spnson rear doors can open
Driver and Commander front hatches open
Commander Top Hatch opens
All rear Hatches open
Rack Raises / Lowers
Texture for track links if static
Texture for track links if animated