More than 500 illustrations—photographs, drawings, and plans, many of them never before published—are featured in Unmanned Systems of World Wars I & II.

Chapter 1

Vintage woodcut engraving (author’s collection) entitled “The Lay Torpedo – The Public Trial at Cleveland, Ohio – from photographs by Thomas T. Sweeny,” circa 1877. Note conical shape, dual rudders, and twin parallel pipes beneath the false keel at lower left for engine exhaust and control-cable payout.

Chapter 2

The WWI German Fernlenkboot underway at full speed. Limited success of the radio-controlled surface torpedo, combined with a growing reliance on the more practical  U-boat, led to eventual discontinuation of the FL Series in late 1918.

Chapter 3

Hammond spark-gap transmitter installed at the Cruft Laboratory, Harvard University, for testing wireless control of underwater torpedoes, circa 1921 (photos courtesy Gelman Library, George Washington University, Albert F. Murray Papers).

Chapter 4

With its cockpit faired over and carrying a 2,000-pound torpedo, this WWII TDR-1 assault drone has jettisoned its landing gear and is committed to the drop (US Navy photo courtesy Norm Tengstrom, Special Task Air Group One control pilot).

Chapter 5

Constructed at the Fisher Tank Arsenal, the radio-controlled T-10 Mine Exploder’s front drive wheels were 8 feet in diameter, while the trailing rear wheel measured 6 feet (US Army photo courtesy Joe DeMarco). Note the bottom of the Sherman M4A2 tank is above the front axle, providing more room for blast dispersion.

Chapter 6

Rare in-flight photo of an unmanned Culver PQ-14B drone and its twin-engine CQ-3 director, trailed by a Curtiss Helldiver chase plane at bottom right (USAAF photo courtesy James Binder).

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