Rotax 915 i A SERIES User Manual

Effectivity: 915 i A Series
Edition 0 / Rev. 0
BRP-Rotax Page 5-3
December 01 2017
Parameters Explantaion
The power stated in the engine deck accounts to:
• The use of different certified fuels
• Maximum allowed temperatures of oil and coolant
• Losses due to gear and governor
• Tolerances of the engine
The observed power depends on:
• MAT (T_Plenum):If the MAT exceeds the given limits power will decrease
below stated values of the engine deck (not specified). For given ambient
and engine conditions the MAT and the pressure in the plenum (p_Ple-
num) can be used to evaluate the air path from the intake to the plenum.
• Fuel: With MOGAS the delivered power will be up to 1.4 [kW] higher than
the stated power in the engine deck. Therefore power loss due to the use
of AVGAS is taken into account.
Fuel Flow [kg/h] Fuel flow at given ambient/engine conditions, tolerance range at stationary
flight conditions (5500-5800 rpm > 55 [kW, 4000-5000 rpm >35 [kW]): 10%.
Flight range must be evaluated by the manufacturer in real plane
application.
p_plenum [bar] At given ambient/engine conditions the pressure and temperature in the
plenum correlates to engine power. Deviation more than +20 mbar (at 5800
rpm/at sea level) indicates failure in the air supply to the engine.
T_plenum [K] At given ambient/engine conditions the temperature and pressure in the
plenum correlates to engine power. Deviation more than +5 °C (41 °F) (at
5800 rpm/at sea level) indicates failure in the air supply to the engine.

Rotax 915 i A SERIES Specifications

General

Brand	Rotax
Model	915 i A SERIES
Category	Engine
Language	English