The Krupp K5 was a rail gun, in that it was transported by rail and was mounted on a carriage that rode on several sets of parallel, curved track in order to train the gun. It did not use an electromagnetically-powered carriage riding between two rails to launch its projectile.
Several other proposals were made to modify or create new models of the K5 which never saw production. In particular, there were plans for a model which could leave the railway by use of specially modified Tiger II tank chassis which would support the mounting box in much the same manner as the railway weapon’s two bogies. This project was ended by the defeat of Germany. (Source)
Take a very close look at this picture of the K5. at the end of the barrel you can see groves on the inside of the barrel. These grooves are 8cm deep and go all the way down the length of the barrel in a helical pattern like this. This is called rifling.
When the gun fires, the ‘bullet’ is put under tremendous forces, and as a result is compressed lengthwise. The compression also pushes parts of the bullet into the groves, and as the bullet travels down the barrel, it locks onto the groves, causing it to spin. This spinning is important as it keeps the bullet stable and pointing forward for the entire duration of it’s flight, taking advantage of gyroscopic stability.
He and other members of the crew died inside their tank when it was burned by German soldiers on January 21, 1943.
According to the recommendation in a fight on 21-01-1943 the crew fearlessly annihilated manpower and machines of the enemy. In total 5 bunkers with officers and up to 120 soldiers, 5 enemy tanks, 24 (armored) vehicles, 19 artillery pieces and mortars and 15 machine gun positions in a 5-hours constant battle until it was hit by a shell and lost it’s maneuvering ability. Even after it was stranded, the tank fired all the ammunition it had. The Germans surrounded the tank and poured gasoline over the tank, demanding the crew to surrender. The crew refused and were burned alive. (Source)
Publicity photo of Nikola Tesla sitting in his laboratory in Colorado Springs in December 1899. Photo was taken by Dickenson V. Alley, photographer at the Century Magazines. The laboratory was built in 1899. Tesla sent a copy of this photograph to Sir William Crookes in England in 1901. This image was created using “trick photography” via a double exposure. The electrical bolts were photographed in a darkened room. The photographic plate was exposed a second time with the equipment off and Tesla sitting in the chair. Tesla’s Colorado Springs notes identify the photo as a double exposure. (Source)
To give an idea of the magnitude of the discharge the experimenter is sitting slightly behind the “extra coil”. I did not like this idea but some people find such photographs interesting. Of course, the discharge was not playing when the experimenter was photographed, as might be imagined!
Prior to the invention of the modern petrochemical industry, whale oil was prized for illumination since it burned very cleanly in oil lamps. It was also used for lots of specialized lubrication applications such as clockworks and transmission gearboxes. In the US, whale oil was used until the signing of the 1972 Endangered Species Act.