Engines – Power

Walter M601

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Originally the Walter turbo prop was designed for the harsh Russian environment with limited field maintenance. The engine does not require a hot section inspection, and requires only an inspection every 300 hours.
First run in 1967, the Walter M601 is a turboprop aircraft engine produced by Walter Aircraft Engines of the Czech Republic. The company’s first turboprop, the M601 is used in business, agricultural and military training aircraft.

The turboprop was designed for use on the Let L-410 and the M601 first ran in 1967. It was not suitable for the prototype L-410 and the company developed an upgraded version, the M601A, with a slightly wider diameter.

Variants:
M601A
Initial production variant for early version of the Let L410.

M601B
Production variant for the Let L410UVP.

M601D
Developed for the Let L410UVP.

M601D-1
Agricultural variant for high-cycle operation, used on the PZL Kruk and Ayres Thrush.

M601D-2
Special variant for paradrop aircraft, used on the Do 28 and some Finist conversions.

M601D-11
Agricultural and paradrop variant with a higher Time Between Overhaul of up to 1800 hours.

M601D-11NZ
Downrated variant for use in the FU-24 Fletcher.

M601E
Developed for the Let L410UVP-E.

M601E-11
General use engine with sub-variants of differing TBO.

M601E-11A
Variant of the 11 for use at higher operating altitudes and modified with a low pressure bleed air system for pressurised aircraft.

M601E-21
Variant for the L410-UVP-E used for hot and high operations.

M601F
Variant intended for use on the L420-UVP.

M601FS

M601F-11

M601F-22

M601F-32

M601FS

M601T
Aerobatic variant for use on the PZL Orlik.

M601H-80
now the GE Aviation Czech H80

M601Z
Agricultural variant for use on the Z-37T.

Applications:
Aerocomp Comp Air 10 XL
Aerocomp Comp Air 7
Ayres Thrush
Dornier Do 28
Lancair Propjet
Let Z-37T – TurboČmelák (AgroTurbo)
Let L-410 Turbolet
Let L-420
Myasishchev/SOKOL M-101T
PAC FU-24 Fletcher
Progress Rysachok
PZL-106 Kruk
PZL-130 Orlik

Specifications:
Take off rating: 690 shp / 515 kW
Prop speed: 2080 rpm
Interturbine temp: 710 deg C
Max continuous: 606 shp / 452 kW
Gas generator speed: 36,080 rpm
Prop speed: 1800-2000 rpm
Interturbine temp: 690 deg C
Max reversing rating: 413 shp / 308 kW
Weight: 420 lb / 190.5 kg

M601D-1
Type: Turboprop
Length: 1675 mm
Diameter: 590 mm
Dry weight: 197 kg
Compressor: 2-stage axial compressor and 1-stage centrifugal compressor
Combustors: annular
Turbine: 1-stage high-pressure and 1-stage free
Maximum power output: 544 kW, 490 kW continuous (740 hp, 657 hp continuous)
Turbine inlet temperature: 690°C
Specific fuel consumption: 0.62 lbs/shph
Power-to-weight ratio: 2.76:1 (kW:kg)

Walsh Bros Seaplane

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The business syndicate, displeased with Vivian’s seemingly excessive caution, took possession of the Manurewa; soon after, it crashed and was damaged beyond repair. Recovering from this setback, Leo, with Vivian’s help, began to design a flying boat of the American Curtiss type which he thought would suit New Zealand conditions. The brothers gained the financial and practical assistance of R. A. Dexter, an American engineer and motor dealer in Auckland, who was to be a consistent supporter.

Fifteen months’ spare time work went into the construction of this aircraft; all the work was carried out by the Walsh brothers, Leo and Vivian, with the exception of the steel fittings which were manufactured by Mr R.A. Dexter, an Auckland engineer who was backing the project.

The hull planking was cedar with ash stringers and mahogany ribs; the hull weighed 305 lbs. Aluminium decking was provided on the forward portion of the hull and the after portion was covered with a special cloth stretched over cedar battens. Seven watertight compartments were built into the hull. The two mainplanes (each 41 ft 6 ins long) had front and rear spars of ash with cedar rib. The fabric covering the wings and the tailplane was doped with cellulose. The aircraft was powered by a 10-cylinder 4-stroke Anzani engine fitted in a special housing at the rear end of the top mainplane. An 8 ft laminated walnut and mahogany propellor with brass tips was fitted.

The aircraft was constructed at the Walshs’ home in Remuera and when completed was dismantled and carried to Bastion Pt, Orakei. After re-assembly the aircraft was launched on January 1, 1915. After taxiing trials and final adjustments, Vivian Walsh took off in the flying boat for a short test flight around Bastion Pt. Many practice flights followed and on March 14 carried its first passengers (covering a distance of five miles).
Even with the light weight of this aircraft (1,200 lbs) the 80 hp Anzani radial engine was only just sufficient to keep the aircraft flying and many hours of work by Leo Walsh were required to keep the engine tuned.

In March 1915 Vivian took the first of many passengers on a flight of five miles. The flying boat itself lasted only 15 months before being dismantled and parts from it were used in the building of an im¬proved flying boat known as “The Roberts”.

Engine: 80 hp Anzani
Weight: 1,200 lbs

Walsh 1910 Monoplane

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In its original configuration (with nose wheel); the modern looking monoplane devised by Charles Francis Walsh, who had founded the San Diego Aeroplane Manufacturing Company the previous year. The machine, with its massive wing, would probably have flown but was severely handicapped by its underpowered Cameron automobile engine of only 29 hp.

Wallman Sportplane

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Circa 1975 Fred W Wallman Jr built the two-place, open cockpit, high-wing monoplane, Sportplane, registered N4FW. The fuselage and tail were steel tube, and wing was all wood.

The Sorrtplans was first flown on 24 September 1975, piloted by Bert Sissler. Only the one was ever built.

Engine: 115hp Lycoming O-235-C1
Wingspan: 30’0″
Length: 21’6″
Useful load: 566 lb
Cruise speed: 100 mph
Stall: 35 mph