3) Airbox - Rotax 912 Series Installation Manual

16.2.3) Airbox

Effectivity: 912 Series
Edition 1 / Rev. 0
BRP-Rotax
INSTALLATION MANUAL
▲ WARNING: The certification to the latest requirement such as FAR
and EASA has to be conducted by the aircraft manu-
facturer.
The following points should assist the aircraft manufacturer at the
choice of a suitable filter:
- four fold cotton fabric
- face covered with metal screen
- total filter area at least 1400 cm
- a min. flow rate of 6,23 m³/min. (220 cfm)
See Fig. 64.
- volume at least 2,5 l (.66 US gal)
- outline dimension see Fig. 64
The airbox is furnished with 2 drain holes (1) at the lowest position
possible.
The holes are necessary to drain fuel from flooding float chambers
caused by badly closing float valve.
Drainage lines:
▲ WARNING: Connect draining lines without fail, otherwise emerg-
ing fuel could drip onto the exhaust system. RISK OF
FIRE!
- The lines have to be routed such that in case of damage the surplus
fuel is drained away suitably.
- Route the lines without kinks and avoid narrow bends.
- Route the lines with a continuous decline.
- The lines have to be protected against any kind of blockage e.g. by
formation of ice.
■ CAUTION:
With closed or blocked drainage bores fuel could flow
into combustion chamber, possibly ruining the engine
by hydraulic lock or emerging fuel could drip onto the
exhaust system. RISK OF FIRE! .
2 2
(220 in )
page 101
May 01/2007