Technical Data - Bombardier-Rotax 377 UL Operator's Manual

18) Technical data:
DESCRIPTION:
BORE:
STROKE:
DISPLACEMENT:
COMPRESSION RATIO:
(theoretical)
POWER OUTPUT:
MAX. RPM
CYLINDER:
PISTON:
TEMPERATURES
OPERATIONAL VALUES:
_
. .
Section 18
twin cylinder-, two stroke Otto engine, lubricated by fuel/oil
mixture, air-cooled by fan
type 377:
type 447:
type 503:
62,0 mm (2,44 in.)
67,5 mm (2,66 in.)
72,0 mm (2,84 in.)
61 mm (2,40 in.)
type 377:
type 447:
type 503:
368,3 c.c. (22,48 cu.in.)
436,6 c.c. (26,64 cu.in.)
496,7 c.c. (30,31 cu.in.)
type 377: 11,6
type 447: 9,6
type 503: 10,8
type 377:
type 447 I carb.:
type 4472 carbo
26,0 kW (35,0 hp )
29,5 kW (40,0 hp)
31,5 kW (43,0 hp)
35,0 kW (47,6 hp )
37,0 kW (50,0 hp )
type 503 1 carb.:
type 503 2 carb.:
for all above types 6800 l/min.
2 light alloy cylinders with cast iron sleeve
peak power
r.p.m.
6500
6600
6600
6500
6600
Aluminium cast piston with 2 piston rings, one semi -trapez ring
(top) and one rectangular ring (bottom)
. . CHT: (cyl. head temperature)
normal:
max.:
difference
between 2 cyl.
180-220
°
C (355-430
OF)
250°C (480
OF)
20°C ( 36
OF)
EGT: (exhaust gas temperature)
460-580 °C (860-1080
OF) .
650°C (1200
OF)
normal:
max.:
difference
between 2 cyl. 25 ° C ( 45 ° F)
crankcase temp. max.: 80°C (175
OF)