User:TSRL/sandbox/Bloch MB.61

The Bloch 60 and Bloch 61 were

Design and development
The Bloch MB.60 was the first design to receive Marcel Bloch's MB. style designation. It was the first prototype of an all-metal, tri-motor mailplane powered by 120 hp Salmson 9Ac nine-cylinder radial engines. The MB.61 was the second prototype which differed only in having Lorraine 5P five-cylinder radials of the same power.

The MB.60 was a high wing cantilever monoplane. It had a five part wing with a rectangular central panel, tapered trapezoidal outer panels with slight dihedral and blunted triangular tips. Ailerons filled the forward swept trailing edges of the outer panels.

ENGINES

It had a rectangular section fuselage built around four longerons and 8.50 m from engine bulkhead to stern. The fully glazed cabin was under the leading edge of the wing with side-by-side seats for pilot and radio operator, though some sources refer to a crew of three.

MB.60 avfr1 MB.61 avfr2

at Vincennes

start of trials of MB.61 (2nd prot)

Variants

 * Bloch 60: 3 × 120 hp Salmson 9Ac, first flight 12 September 1930. One built.


 * Bloch 61: 3 × 120 hp Lorraine 5Pe, first flight February 1931. One built.