STEMME S12 User Manual

DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: 
CHAPTERPAGE 314
MAINTENANCE MANUAL STEMME S12
3.4.4 AIR INDUCTION SYSTEM
SYSTEM DESCRIPTION
Refer to the Maintenance Manual (heavy maintenance) for ROTAX Engine Types ROTAX 914
Series, section 73.
The engine induction air is routed from the RH inlet cowl ap via a duct, an air lter, and a short
exible tube to the turbocharger unit. Compressed air from the turbocharger is routed via two
tubes through the inter-cooler to the airbox. The inter-cooler, with a drain at its lowest point, is
installed on the RH side of the center fuselage frame.
Cooling air for the inter-cooler is taken from the RH inlet cowl ap, directed into the engine bay
and to the outside via the lower outlet cowl ap.
The airbox is supported by two rubber mounts on the diagonal strut of the turbocharger unit. The
airbox drainage lines are routed to the outlet cowl ap, in order to allow drained fuel to leave the
engine compartment.
3.4.5 ENGINE EXHAUST INCL. TURBOCHARGER AND ATTACHMENT
SYSTEM DESCRIPTION
Refer to the Maintenance Manual (heavy maintenance) for ROTAX ENGINE TYPES 914 SERIES,
section 78.
TURBOCHARGER ATTACHMENT
Five steel tube struts at aft engine mounts.
The turbocharger unit, consisting of turbocharger and muer, is installed aft of the engine and
supported by ve struts on the crankshaft housing. The turbocharger is supplied with oil by oil
suction and oil pressure pipes from the engine oil pump.
The exhaust headers are installed below the engine, constructed using original ROTAX connect-
ing elements. The headers are isolated from heat sensitive components. The exhaust headers are
attached to the turbocharger by springs, positioning the headers in spite of the thermal eects.
The exhaust headers are shrouded by a temperature-resistant glass-ber-tape (Frenzelit Isotherm
1000). The tape terminals are xed by special spring-loaded brackets.
The muer is covered by formed elements of an insulation material (Frenzelit „Isosafe“ 12 mm).
To avoid heat radiation, heat protective shields (stainless steel) are installed close to the turbo-
charger unit. The exhaust pipe of the muer is routed through a hole in the LH engine cowling.
In order to protect overowing fuel from contact with hot exhaust system parts, drain lines from
the drip trays below each carburetor are routed to the lower cowl ap.

STEMME S12 Specifications

General

Brand	STEMME
Model	S12
Category	Aircrafts
Language	English