Engines – Power

Wolseley A.R.9 / Aries / Scorpio / Leo / Libra

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Wolseley Scorpio Mk II

The Wolseley Aries III or A.R.9 was a British nine-cylinder, air-cooled radial aero engine that first ran in 1933, it was designed and built by Wolseley Motors. Intended for the military trainer aircraft market few were produced as Wolseley withdrew from the aero-engine market in 1936, see Airspeed Ltd.. A larger capacity version was known as the Wolseley Scorpio, further enlarged versions, the Leo and Libra were test run but did not fly.

Variants:
A.R.9 Mk I
203 horsepower (151 kW).

A.R.9 Mk II
205 horsepower (153 kW). Higher permissible rpm version of Mk I.

A.R.9 Aries Mk III
225 horsepower (168 kW), low boost supercharger fitted.

Scorpio I
250 horsepower (186 kW), (230 bhp at 2,250 rpm), increased bore (111mm x 120 mm) to give a displacement of 9,477 cc, increased compression ratio. Reduction gearing.

Scorpio II and III
250 horsepower (186 kW), designed to run on 87 octane fuel with 6.5:1 ratio.

Leo
280 horsepower (209 kW), few details, not flown or produced.

Libra
390 hp at 6,000 ft. 725 lbs (329 kg). Tested but not flown or produced.

Applications:
Airspeed Envoy
Hawker Tomtit

Specifications:
A.R.9 Aries Mk III
Type: 9-cylinder, single row, radial engine
Bore: 4.19 in (106 mm)
Stroke: 4.75 in (120 mm)
Displacement: 588.6 cu in (9.654 L)
Length: 42 in (1,067 mm)
Diameter: 41.25 in (1,048 mm)
Dry weight: 510 lb (231 kg)
Valvetrain: Overhead valve
Supercharger: Single speed, geared induction fan, slight positive pressure
Fuel type: Petrol
Cooling system: Air-cooled
Reduction gear: Epicyclic spur geared, right-hand tractor, reduction ratio 0.629:1
Power output: 225 hp (168 kW) at 2,475 rpm (maximum power)
Specific power: 0.38 hp/cu in (17.4 kw/L)
Compression ratio: 5.35:1
Power-to-weight ratio: 0.49 hp/lb (0.72 kW/kg)

Wolseley A.R.7 Aquarius I

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The Wolseley Aquarius I or A.R.7 was a British seven-cylinder, air-cooled radial aero engine that first ran in 1933, it was designed and built by Wolseley Motors. Intended for the military trainer aircraft market few were produced, as Wolseley withdrew from the aero-engine market in 1936.

Applications:
Hawker Tomtit

A.R.7
Type: 7-cylinder, single row, radial engine
Bore: 4.188 in (106 mm)
Stroke: 4.75 in (120 mm)
Displacement: 458 cu in (7.5 L)
Length: 36.4 in (925 mm)
Diameter: 40.25 in (1,029 mm)
Dry weight: 375 lb (170 kg)
Valvetrain: Overhead valve
Fuel type: Petrol
Cooling system: Air-cooled
Reduction gear: Direct drive, left-hand tractor
Power output: 170 hp (127 kW) at 2,475 rpm (maximum power)
Specific power: 0.37 hp/cu in (16.9 kw/L)
Compression ratio: 5.35:1
Power-to-weight ratio: 0.45 hp/lb (0.75 kW/kg)

Wolseley 1912 160hp V-8

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The Wolseley 160 hp was a British V-8, water-cooled aero engine that first ran in 1910, it was designed and built by Wolseley Motors. Its sole known use was in the ill-fated HMA No. 1 airship which broke in two while being removed from its shed on 24 September 1911.

160 hp
Type: eight-cylinder, 90 degree, upright V-engine
Bore: 5.0 in (127 mm)
Stroke: 7.0 in (178 mm)
Displacement: 1,100 cu in (18 L)
Fuel type: Petrol
Cooling system: Water-cooled
Reduction gear: Direct drive, right-hand tractor
Power output: 147 hp (110 kW) at 1,200 rpm (maximum power for “short periods”)
Specific power: 0.13 hp/cu in (6.1 kw/L)

Wolseley 1910 Type C 60 hp V-8 / 1911 Type B 80 hp V-8

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Wolseley 60 hp

First run in 1910, the Wolseley 60 hp or Type C was a British liquid-cooled V-8 aero engine that first ran in 1910, it was designed and built by Wolseley Motors. The engine featured water-cooled exhaust ports and employed a 20 lb (9 kg) flywheel. During an official four-hour test the engine produced an average of 55 horsepower (41 kW). A larger capacity variant known as the 80 hp or Type B used an internal camshaft and propeller reduction gear.

Applications:
60 hp
Royal Aircraft Factory B.E.1
Royal Aircraft Factory B.E.2

80 hp
Vickers E.F.B.1

Specifications:
60 hp
Type: 8-cylinder, upright, 90-degree Vee engine
Bore: 3.74 in (95 mm)
Stroke: 5.51 in (140 mm)
Displacement: 482 cu in (7.9 L)
Dry weight: 385 lb (175 kg)
Valvetrain: Sidevalve with single external camshaft
Fuel system: Single Zenith carburettor
Fuel type: 40-50 octane petrol
Cooling system: Air-cooled with liquid-cooled exhausts
Reduction gear: Direct drive, left-hand tractor
Power output: 60 hp (45 kW) at 1,800 rpm (maximum power)
Specific power: 0.12 hp/cu in (5.7 kw/L)
Power-to-weight ratio: 0.15 hp/lb (0.25 kW/kg)

Wolfsberg Letecka Tovrna Sparrow

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The Wolfsberg Letecka Tovrna Sparrow ML is a twin tail boom airplane with a pusher propeller. The design features large car-like doors that can be opened up to 90°. The pilot position in front of the wing brings excellent view.

The Sparrow is equipped with the 80hp and 100 hp Rotax engines. The main undercarriage is equipped with oil dampers, the wheels of the main chassis are fitted with hydraulic disc brakes. The dashboard is designed for mounting both classic mechanical devices and state-of-the-art glass cockpit.

Sparrow ML was designed, calculated and tested to fulfill all requirements of Ultralight and LSA standards.

The airplane has modern light carbon fiber construction and conventional controls with control stick and pedals and electric flaps and trim control. Sparrow ML can have full dual controls or only pilot control on front seat.

The dashboard position allows convenient control of all devices and switches.

The aircraft is equipped with a proven ballistic rescue system.

Engine: Rotax 912 ULS: 80-100 hp
Wing span: 9.1m / 29.9 ft
Wing area: 11.6 sq.m / 124.9 sq.ft
Length: 7 m / 23.0 ft
Height: 1.7 m / 5.6 ft
Empty weight: 272 kg / 600 lb
Gross weight: 600 kg / 1323 kg
Fuel capacity: 60 lt / 15.9 gal
Min pilot weight: 75 kg / 165 lb
Max baggage weight: 8 kg / 17.6 lb
Stall clean: 60 kph / 32.4 kt
Stall ldg config: 57 kph / 30.8 kt
Maneuvering speed: 160 kph / 86.4 kt
Max speed ldg config: 115 kph / 62.1 kt
Max cruise: 210 kph / 113.4 kt
Vne: 234 kph / 126.4 kt

Wolff Sky-Wolff

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Paul Wolff’s 4 place, all composite Sky-Wolff was intended to make Oshkosh 1988, but was not flying in time, later, flying from Findel Airport in Luxembourg.

Aimed at a US25,000 kit price, The Sky-Wolff will have removeable wings, an electric/hydraulic retractable gear, and wet wing with additional tip tanks. The wing is equipped wih flaps and drooping ailerons.

Fuel capacity: 169.3 USG
Range: 4200 miles
Engine: Lycoming O-320
Cruise 75%: 186 kt / 214 mph
Stall: 50 mph