Alfa Romeo 115
| Alfa Romeo 115 | |
|---|---|
 |
|
| Alfa Romeo 115 | |
| Type | Piston aircraft engine |
| Manufacturer | Alfa Romeo |
| First run | 1930s |
| Number built | 115 ~1,600 |
The Alfa Romeo 115 was an Italian 6-cylinder air-cooled inverted inline engine for aircraft use, mainly for training and light planes, based on the de Havilland Gipsy Six engine. Production totalled approximately 1,600 units. Derivatives of the 115 include the -1, bis, ter and Alfa Romeo 116.[1]
Contents
Description
The Alfa Romeo 115 series of engines closely follows the original de Havilland Gipsy Six engines in having 1-piece Elektron casting crankcases with cover plates, steel cylinders, finned for cooling, and detachable aluminium alloy cylinder heads. The 6-throw 1-piece counterbalanced crankshaft is carried in seven plain journal bearings and the propeller is driven directly by the crankshaft.
Variants
- 115-1 (115-I)
- 115bis (115-2 / 115-II)
- 115ter (115-3 / 115-III)
- 116-1 (116-I)
- The 115 bored out to 120 mm (4.72 in) developing 164.05 kW (220 hp) at 2,360 rpm, otherwise similar.[1][2]
Applications
- Ambrosini SAI.3
- Bestetti BN.1 (one prototype)
- Breda Ba.75 (prototypes)
- Breda Ba.79S
- CANT Z.1012 (or 110)
- Caproni Ca.164
- Nardi FN.305
- Nardi FN.315
- Saiman 200
- Ambrosini SAI.2S (115-1)
- Caproni Ca.309 Ghibli (115bis)
- Fiat G.46-1B (115bis)[3]
- Fiat G.46-3B (115bis)
- Fiat G.46-4B (115bis)
- Ambrosini S.7 (115ter)
- Fiat G.46-A (115ter)
- Fiat G.46-3A (115ter)
- Fiat G.46-4A (115ter)
Specifications (115-1)
Data from Jane's All The World's Aircraft 1938[2] Italian Civil and Military aircraft 1930–1945[1] Aircraft Engines of the World 1945[4]
General characteristics
- Type: six-cylinder inverted air-cooled inline engine
- Bore: 118 mm (4.65 in) (115), 120 mm (4.72 in) (116-1)
- Stroke: 140 mm (5.51 in)
- Displacement: 9.187 L (560.63 cu in) (115), 9.5 L (579.73 cu in) (116-1)
- Length: 1,642 mm (64.65 in)
- Width: 498 mm (19.61 in)
- Height: 825 mm (32.48 in)
- Dry weight: 210 kg (462.97 lb) (115-1), 223 kg (491.63 lb) (115ter)
- Frontal Area: 0.35 m2 (3.8 sq ft)
Components
- Valvetrain: Two valves per cylinder, sodium-cooled exhaust valves
- Fuel system: Two Mona-hobson AI48D downdraught carburettors with mixture control
- Fuel type: 73 octane
- Oil system: 275.8–310.3 kPa (40–45 psi), dry sump with one pressure and three scavenge pumps.
- Oil grade (viscosity): 20.5 cs (100 S.U. secs)
-
- Oil consumption: 0.01095 kg/kW/hr (0.018 lb/hp/hr)
- Cooling system: Air-cooled
- Reduction gear: Direct drive
- Starter: Hand starter
- Ignition: 2x Marelli magnetoes, 2x 14 mm (0.55 in) short reach spark plugs per cylinder.
Performance
- Power output:
- Maximum power (115-1): 152.87 kW (205 hp) at 2,350 rpm
-
- Maximum power (115bis): 145.41 kW (195 hp)
-
- Maximum power (115ter): 167.78 kW (225 hp) at 2,350 rpm with 100/130 Octane fuel
-
- Maximum power (116-1): 164.05 kW (220 hp) at 2,360 rpm
-
- Normal (115-1): 145.41 kW (195 hp) at 2,200 rpm
-
- Normal (115ter): 160.33 kW (215 hp) at 2,100 rpm with 100/130 Octane fuel
-
- Normal (116-1): 156.60 kW (210 hp) at 2,250 rpm
-
- Cruising (115-1): 104.40 kW (140 hp) at 1,500 rpm
- Compression ratio: 6.5:1
- Specific fuel consumption: 0.322 kg/kW/hr (0.53 lb/hp/hr) (take-off)
- Oil consumption: 0.011 kg/kW/hr (0.018 lb/hp/hr)
- Power-to-weight ratio: 0.727 kW/kg (0.4425 hp/lb)
See also
- Comparable engines
- Related lists
Notes
References
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External links
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