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Aircraft Engine 503UL-D.C.D.I

DESCRIPTION
2-Cyl. 2-stroke fan cooled engine with piston port inlet, with electronic dual ignition, exhaust system, carburetor, rewind starter.

Rotax 503 UL

Version

Performance
kW

Performance
hp

Performance
1/min

Torque
Nm

Torque
ft.lbf.

Torque
1/min

R.P.M
1/min

503 UL-1V

34.0

45.6

6500

51

37.6

5900

6800

503 UL-1V

37.0

49.6

6500

55

40.6

6000

6800

Bore

Bore

Stroke

Stroke

Displacement

Displacement

Compession
Ratio

Compession
Ratio

72.0 mm

2,84 in.

61 mm

2,40 in.

496.7 cm3

30,31 cu.in.

th: 10,8

ef: 6,2

Fuel

Super 2-stroke oil

Mixing ratio

min MON 83 RON 91*
min AKI 87*
*leaded or unleaded

API-TC Classification

1:50**
**variable with fresh oil pump

Ignition Unit

Ignition Timing

Spark Plug

DUCATI dual CDI

16° v.OT

Rotax Part # 897050

Generator Performance

R.P.M

Voltage

155 W DC

6000 1/min.

13.5 V

WEIGHT

Kg

lb

Std.

engine (* also available in free air version

31.4

69.2

Std.

2 carbutetors

1.8

4.0

Std.

exhaust system

5.1

11.2

Opt.

2 air cleaners

0.3

0.7

Opt.

dual air cleaner

0.5

1.1

Opt.

electric starter

3.5

7.7

Opt.

"B" gearbox / i = 2.0 / 2.4 / 2.58

4.5

9.9

Opt.

"C" gearbox / i = 2.62 / 3.0 / 3.47 / 4.0

8.0

17.6

Opt.

"E" gearbox / i = 2.62 / 3.0 / 3.47 / 4.0

11.2

24.7

Opt.

Generator 220 W DC

1.1

2.4

Opt.

Oil tank 2.4 l

1.6

3.5

Opt.

Fresh oil pump

0.3

0.7

Opt.

HAC - Kit

0.2

0.4

Opt.

Intake silencer 1V

0.8

1.8

Opt.

Intake silencer 2V

1.1

2.4

Opt.

After muffler

1.6

3.5

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