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THE AERONAUTICAL ENGINE WITH THE BEST POWER / WEIGHT RATIO
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Motor can be ordered with clockwise or anticlockwise rotation
MAX POWER | 140 (102.9) @4200rpm |
[kW (Hp)] | |
MAX TORQUE | 267 (197) @3000rpm |
[Nm (lb-ft)] | |
POWER/WEIGHT RATIO | 1.62 (0.73) |
[Hp/Kg (Hp/lb)] |
- Type: 4-cylinder boxer
- Fuel: Mo.GAS min. AKI 90, R.O.N. 95, M.O.N. 85, LL100
- Cooling System: liquid cooled with mechanical pump
- Engine Control: double injection and ignition system
- T.B.O. [h]: 2000

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Engine Data
Model/CodeĀ | SPIRIT 140 PSRU / W021 (left rotation) – W022 (right rotation) |
Type | 4 cylinder boxer –Ā 4 stroke fuel (Otto cycle) |
Displacement [cm3 (in3)] | 2545 (155) |
Weight [Kg (lbs)] | 86.5 (190.7) dry (without accessories) |
Dimension L x W x H [mm (in)] | 673 x 749 x 419 (26.5 x 29.49 x 16.5) |
Stroke X Bore [mm (in)] | 81 x 100 (3.18 x 3.93) |
Compression RateĀ | 10.1 Ć· 1 |
FuelĀ | Mo.GAS min. AKI 90, R.O.N. 95, M.O.N. 85, LL100 |
Cooling SystemĀ | Liquid with mechanical pump |
Lubrication | Semi-dry sump, pressure oil feed assisted with internal pump |
Timing SystemĀ | 2 valves per cylinder with S.O.H.C. (Single Over Head Camshaft) |
Timing Driving SystemĀ | Gear + chain with automatic chain tensioner |
Pre-installed Accessories (included in the weight) | Engine wiring loom, voltage regulator, start relay, dampers, ignition coils, cooling expansion tank |
Transmission
TypeĀ | Gearbox with helical gear (separate lubrication) |
Transmission Ratio | 1 Ć· 1.732 |
Max Propeller Speed [rpm] | 2450 |
Propeller Rotation | Right (R) or Left (L) |
Damper | Elasto-dissipative with Active Damping Control (A.D.C.) |
Optional | Integrated constant speed hydraulic governor |
ELECTRIC DATA
Generator | Permanent magnet, oil cooled, 260W (12.5V-21A) |
Optional Generator | 750W (12,5V -60A); 2250W (12,5V -90A); 2250W (25V – 180A) |
Starter | Electric 0.65kW with anti-kickback clutch |
F.R.I.S. (Full Rendundancy Injection System) |
ECU with dual injection and ignition; altitude and temperature compensation; Limp Home strategy |
CAN Data Transmission | CAN Aerospace protocol |
Max Power [kW (Hp)] | 103 (140) @ 4200 rpm |
Max Torque [Nm (lb-ft)] | 267 (197) @ 3000 rpm |
Max Continuous Power [kW (Hp)] | 91.9 (125) |
Max Engine Speed [rpm] | 4250 |
Power/Weight [Hp/Kg (Hp/lb)] | 1.62 (0.73) |
Fuel Cons. [Kg/h (lb/h)] | 12.6 (27.8) @ 75 Hp |
TBO [h] | 2000 |
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Weight [Kg (lb)] |
86.5 (190.7) dry (without accessories)
|
Dimension L x W x H [mm (in)] | 673 x 749 x 419 (26.5 x 29.49 x 16.5) |

Take off Consumption [Kg/h (lb/h)] | 23.1 (50.9) @ 140 Hp |
At Max Continuous Power [Kg/h (lb/h)] | 20.1 (44.3) @ 125 Hp |
At 75% [Kg/h (lb/h)] | 15.9 (35.1) @ 105 Hp |
At 65% [Kg/h (lb/h)] | 14.2 (31.3) @ 91 Hp |
At 55% [Kg/h (lb/h)] | 12.8 (28.2) @ 77 Hp |
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Model |
SPIRIT 140 GEARED R/L |
Type |
4 cylinder boxer – 4 stroke fuel (Otto cycle) |
Displacement [cm3 (in3)] |
2545 (155) |
Weight [Kg (lbs)] |
86.5 (190.7) dry (without accessories) |
Dimension L x W x H [mm (in)] |
673 x 749 x 419 (26.5 x 29.49 x 16.5) |
Stroke X Bore [mm (in)] |
81 x 100 (3.18 x 3.93) |
Compression RateĀ |
10.1 Ć· 1 |
FuelĀ |
Mo.GAS min. AKI 90, R.O.N. 95, M.O.N. 85, LL100 |
Cooling SystemĀ |
Liquid with mechanical pump |
Lubrication |
Semi-dry sump, pressure oil feed assisted with internal pump |
Timing SystemĀ |
2 valves per cylinder with S.O.H.C. (Single Over Head Camshaft) |
Timing Driving SystemĀ |
Gear + chain with automatic chain tensioner |
Pre-installed Accessories (included in the weight) |
Engine wiring loom, voltage regulator, start relay, dampers, ignition coils, cooling expansion tank |
Transmission
TypeĀ |
Gearbox with helical gear (separate lubrication) |
Transmission Ratio |
1 Ć· 1.732 |
Max Propeller Speed [rpm] |
2450 |
Propeller Rotation |
Right (R) or Left (L) |
Damper |
Elasto-dissipative with Active Damping Control (A.D.C.) |
Optional |
Integrated constant speed hydraulic governor |
ELECTRIC DATA
Generator |
Permanent magnet, oil cooled, 260W (12.5V-21A) |
Optional Generator |
750W (12,5V -60A); 2250W (12,5V -90A); 2250W (25V – 180A) |
Starter |
Electric 0.65kW with anti-kickback clutch |
F.R.I.S. (Full Rendundancy Injection System) |
ECU with dual injection and ignition; altitude and temperature compensation; Limp Home strategy |
CAN Data Transmission |
CAN Aerospace protocol |
Max Power [kW (Hp)] |
103 (140) @ 4200 rpm |
Max Torque [Nm (lb-ft)] |
267 (197) @ 3000 rpm |
Max Continuous Power [kW (Hp)] |
91.9 (125) |
Max Engine Speed [rpm] |
4250 |
Power/Weight [Hp/Kg (Hp/lb)] |
1.62 (0.73) |
Fuel Cons. [Kg/h (lb/h)] |
12.6 (27.8) @ 75 Hp |
TBO [h] |
2000 |

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Weight [Kg (lb)] |
86.5 (190.7) dry (without accessories) |
Dimension L x W x H [mm (in)] |
673 x 749 x 419 (26.5 x 29.49 x 16.5) |

At Take Off [Kg/h (lb/h)] |
23.1 (50.9) @ 140 Hp |
At Max Continuous Power [Kg/h (lb/h)] |
20.1 (44.3) @ 125 Hp |
At 75% [Kg/h (lb/h)] |
15.9 (35.1) @ 105 Hp |
At 65% [Kg/h (lb/h)] |
14.2 (31.3) @ 91 Hp |
At 55% [Kg/h (lb/h)] |
12.8 (28.2) @ 77 Hp |
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