| Rotax 618 aircraft engines specs. |
| DESCRIPTION: |
Two cylinder, two stroke liquid cooled engine with rotary valve
inlet, with RAVE (adjustable variable exhaust), dual electronic ignition, integrated water
pump and thermostat, exhaust system, electric start, model "C" or :E: gear box
only, intake silencer, and oil injection. |
| BORE: |
76.0 mm (2.99in.) |
| STROKE: |
68.0 mm (2.68in.) |
| DISPLACEMENT: |
617 cc (37.65 cu. in.) |
| COMPRESSION: |
Theoretical: 11.5 - effective 5.95 |
| POWER OUTPUT: |
48 kw (73.8 hp SAE) at 6750- 1/min |
| TORQUE: |
75 nm (55.3 ft. lbs.) at 6,000 1/min. |
| MAX RPM: |
6800 |
| DIRECTION OF ROTATION: |
Counter- clockwise,
viewed towards PTO
(Clockwise with Reduction installed) |
| CYLINDER: |
2 light alloy cylinder with cast iron sleeves |
| PISTON: |
aluminum cast piston with 2 piston rings |
| PISTON/CYLINDER CLEARANCE: |
0.06mm (.0024") |
CHT: Cylinder Head Temperatures
(Optional Values) |
Normal: 110C- 130C or 230F-270 F |
| Maximum: 150C or 300F |
| Max. Difference: 10C or 45F |
| EGT: Exhaust Gas Temperatures |
Normal: 500C - 620C or 930F - 1150F |
| Maximum: 650C or 1200F |
| Max. Difference: 25C or 45F |
| Crankcase Temp. Max.: 80C or 175F |
| Cooling Liquid Temp Max.: 80C or 175F |
| IGNITION SYSTEM: |
Breakerless Ducati Capacitor Discharge Dual Ignition with
magneto generator |
| GENERATOR OUTPUT: |
200 Watts AC at 6000prm and 13.5 RMS |
| IGNITION TIMING: |
1.96mm or .077" (18 BTDC) |
| SPARK PLUG: |
14mm NGK B8ES |
| ELECTRODE GAP: |
0.5mm (.02") |
| ROTARY VALVE TIMING: |
Opens: 130 BTDC
Closes: 50 ATDC |
| CARBURETOR: |
2 x Bing 54 36mm Slide Valve |
| FUEL PUMP: |
Pneumatic fuel pump |
| FUEL: |
Regular or Premium Gasoline, octane number not below RON 90
(unleaded) |
| LUBRICATION OF ENGINE: |
Oil-in- fuel with Super two-cycle oil ASTM/CEC standard, mixing
ratio |
| LUBRICATION OF REDUCTION GEAR: |
Gear oil API-GL5 or GL6, SAE 140 EP or 85W - 140EP |
| DIRECTION OF PROPELLER SHAFT: |
Clockwise, viewed towards prop flange |
| STARTER: |
Rewind Starter Standard |
| STANDARD VERSION INCLUDES: |
Engine with carburetors w/ clamps, fuel pump, exhaust system |
| WEIGHT: |
Engine Block: ............................................ 68.3
lbs. |
| 2 Carburetors ...............................................4.0
lbs. |
| Intake Silencer..............................................2.4
lbs. |
| Electric
Starter..............................................7.7 lbs. |
| "C" Gear Box
.............................................17.0 lbs. |
| Exhaust system .........................................13.2
lbs. |
