2008, october, 17
3-3 Rotax 912
3-3.1 Manufacturer
Rotax Gesmbh & Co KG
Motorenfabrik, Welser STR 32
4623 Guunskirchen / Austria
3-3.2 Technical datas
4 cylinders 4 stroke
Air/Water/oil cooled
1211 cc
79 hp (58 KW) at 5800 tr/mn
Gearbox 1 :2,273
Double ignition
Fuel : Mixture unleaded 95 octane
Oil : 4 stroke engine oil following engine manufacturer’s instructions
3-3.3 Propeller
-Two or three blades ARPLAST
Material : composite
-Two or three blades DUC
Material : composite
-Two blades ULX
Material :wood
3-3.4 Noise pollution
The most unfavourable case is a noise heard under trajectory when aircraft has just
taken off, full throttle, optimum climb speed.
QNH : 1010
θ
: 17°C
50m
~300m
soundmeter
Lm = 71 dB a
Heard noise under trajectory Lh at a flight altitude h:
Lh = Lm – 22 log (h/50)
Example: heard noise by an observer located at 100m under the plane trajectory:
Lh = 69 - 22 log(100/50) = 64.38 dB a
Содержание X-AIR HANUMAN 602T AP
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