| 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
.............................................7.0 lbs. |
| Exhaust system
.........................................3.2
lbs. |
