"Although more 80-foot Elco boats were built than any other type of motor torpedo boat, other types were built by the US. The British-designed 70-foot Vosper boats which were built for Lend Lease fired 18-inch torpedoes. Since the U.S. produced the heavier and longer 21-inch torpedoes, the U.S. Navy wanted a larger PT boat. After experimentation, the first PT boat built in any quantity was the 77-foot type built by Elco. These boats were used early in World War II. In 1943 in the Solomons, three of these 77-foot PT boats, PT 59, PT 60 and PT 61, were even converted into gunboats by stripping the boat of all original armament except for the two twin .50 caliber gun mounts, and then adding two 40mm guns and four more twin .50 caliber machine guns. LTJG John F. Kennedy was the first commanding officer of PT 59 after the conversion. " Motor Torpedo Boats (PT)
1934 - Russian Navy Tupolev Torpedo Cutter G.5 The Soviet Tupolev G-5 torpedo boat was one of the most unique designs among ships of World War II. The father of the G-5 was eminent aircraft designer, Professor Andrey N. Tupolev. While smaller than any other torpedo boat in any navy, it attained a brilliant war record and the courage of its crew was legendary. http://www.patriotfiles.com/forum/showthread.php?p=427368
That artwork is from Joe Hinds, author of a ten-volume series on motor torpedo boats that is now being published by Nimble Books.
The G-5 was a direct outgrowth of the British CMB of WWI. The Russians got a firsthand look at their potential during the Kronshtadt raid.