|1967 Maule M-4-210C Rocket - HB-ETR (sn 1033C)
Photo taken May 29, 2004
Triengen - Switzerland (LSPN)
|Photo © Marcel Siegenthaler
The Maule M-4 is an American four-seat cabin monoplane designed by Belford Maule and built by the Maule Aircraft Company.
Design and development
The design of the M-4 was started in 1956 by Belford Maule and the prototype Bee Dee first flew in February 1957. Maule started the Maule Aircraft Company to develop and build the aircraft in Jackson, Michigan as the Maule M-4. The first M-4 flew on the 8 September 1960. The M-4 is a steel-tube and fabric high-wing braced-monoplane with a cantilever tailplane with a single fin and rudder. It has a fixed tailwheel landing gear and the prototype was powered by a nose-mounted 145hp (108kW) Continental O-300 engine. It has an enclosed cabin with two-rows of side-by-side seating for a pilot and three passengers. The prototype first flew on 8 September 1961 and production started in 1963. Other variants were introduced including the Rocket which is powered by a 210hp (157kW) Continental IO-360-A engine, a de-luxe Franklin-powered M-4 Astro-Rocket and a Franklin-powered Rocket which is known as the M-4 Strata-Rocket.
A STOL variant of the Strata Rocket was developed as the Maule M-5 Lunar Rocket.
- Bee Dee
Prototype with a 145hp (108kW) Continental O-300-A piston engine, 11 built.
- M-4 Jetasen
Production version of the earlier Maule Bee Dee with 145hp (108kW) Continental O-300A piston engine, 94 built.
- M-4C Jetasen
Fitted with a cargo door, 11 built.
Upgraded equipment, three built.
Dual-control trainer withouth rear-seats or rear-entry door, three built.
- M-4C-180 Astro-Rocket
M-4C with a 180hp (134kW) Franklin 6A-335-1A engine, seven built.
- M-4-210 Rocket
M-4 with a 210hp (157kW) Continental IO-360-A engine, 45 built.
- M-4-210C Rocket
M-4-210 fitted with a cargo door, 117 built.
- M-4-220C Strata Rocket
M-4C with a 220hp (164kW) Franklin 6A-350-C1 engine, 190 built.
M-4S with a a 220hp (164kW) Franklin 6A-350-C1 engine, one built.
- Mexican M-1 Cuauhtemoc
License-built M-4 with a 180hp Lycoming O-360 engine, three built.
Specifications (M-4-220C Strata Rocket)
Length: 22 ft 0 in (6.71 m)
Wingspan: 29 ft 9 in (9.07 m)
Empty weight: 1280 lb (581 kg)
Gross weight: 2300 lb (1043 kg)
Powerplant: 1 × Franklin 6A-350, 220 hp (164 kW)
Maximum speed: 180 mph (288 km/h)
Range: 680 miles (1094 km)
Service ceiling: 15,498 ft (4725 m)