The Miles M.13 Hobby was a small low-winged monoplane built for racing and research in the United Kingdom just before World War II.

The Hobby,[1][2][3] named like many other aircraft designed by F. G. Miles after a bird of prey, was a small low winged cantilever monoplane powered by an inverted, inline 145 hp (108 kW) de Havilland Gipsy Major 2 engine driving a two-blade variable-pitch propeller.

It was a wooden aircraft with spruce frames for both fuselage and flying surfaces with a birch plywood skin and a final cover of doped fabric.

The pilot's cockpit, placed at the wing trailing edge was enclosed and neatly glazed for its day with a single piece Perspex windscreen and separate cover.

Civil Aviation Authority (CAA) documents[4] show it to have been registered (as G-AFAW) on 26 April 1937, but it seems it not to have flown until early September, piloted by F.G Miles at Woodley Aerodrome.