Mann & Grimmer M.1
1915
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Mann & Grimmer M.1

Designed by R F Mann and R P Grimmer, the M.I twoseat fighter represented an attempt to combine the superior performance offered by a tractor configuration with the clear forward field of fire provided by a pusher arrangement. The conventionally-mounted Anzani 10- cylinder air-cooled radial engine drove two pusher propellers by means of an extended shaft via a gearbox and chains. The gunner was seated immediately aft of the engine, the pilot's cockpit being just behind the plane of the propellers. The M.1 was first flown on 19 February 1915, but difficulties were experienced with the chain transmission and with handling. Various modifications were made and the 100hp Anzani engine was replaced by one rated at 125hp, but after some 18 hours of flight testing, the M.1 was wrecked on 16 November 1915 before it could be evaluated by the RFC, and although work on the prototype of an improved version, the M.2, was begun, no further aircraft was completed.

3-View 
Mann & Grimmer M.1A three-view drawing (1278 x 820)


Specification 
 WEIGHTS
    Take-off weight1270 kg2800 lb
    Empty weight953 kg2101 lb
 DIMENSIONS
    Wingspan10.59 m35 ft 9 in
    Length8.05 m26 ft 5 in
    Wing area29.91 m2321.95 sq ft
 PERFORMANCE
    Max. speed137 km/h85 mph

Comments
L B Mann, 03.12.2010

Do you have any information about R F Mann? We may be related.

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