AIRCRAFT FLIGHT
MANUAL
BRISTELL B23
Document No.: ADXC-73-001-AFM
Non-approved page
Revision: A2
7-18
Date of Issue: 15.04.2021
7.9
Powerplant
Standard power unit of BRISTELL B 23 airplane is the ROTAX 912S
engine and MTV-34 in flight adjustable 3-blade propeller. Both, engine
(EASA-TCDS E.121) and propeller (EASA-TCDS P.049) are certified.
7.9.1
Engine
ROTAX 912S is a 4 stroke, 4 opposed - cylinder engine, central cam
shaft and OHV - mechanism with maximal power of 73.5 kW (98.6 hp) at
5800 RPM.
The engine (and fuel system) can be operated on automotive fuel,
MOGAS as well as on AVGAS. However, continued use of AVGAS is not
recommended by the engine manufacturer.
Following recommendations are provided for use of automotive fuel and
MOGAS:
•
Only fuel for the specific climate zone should used
•
Special attention should be paid to the current outside air
temperature
•
Winter blends of MOGAS shall not be used in warmer than
normal temperatures
•
There is a risk of vapor formation when using winter fuel for
summer operation.
•
Fuel with more than 5% of ethanol blend should not be used
The recommended power settings for operation are defined in ROTAX
SL-912-016R1:
-
Engine operation above 5200 RPM is not limited by manifold
pressure.
-
Engine speed over 5500 RPM is limited to 5min maximum
-
Continuous use of engine speed below 5200 RPM must follow
pressure graph below
-
Note: only applicable on pressure altitude below 3500ft