Russian Corps
In 1826–29, a 17.5 mm bore experimental steam cannon was developed by Colonel Karelin of the Imperial Russian Corps of Communications. The barrel was of green copper in a red copper casing; it was capable of firing cannonballs at a rate of 50 rounds per minute. Tests in 1829 failed and the gun was transferred to the arsenal of St. Petersburg. It is now in the Military Historical Museum of Artillery, Engineers and Signal Corps in St. Petersburg.