Airplane Maintenance Manual
Bristell
B23
Chapter 72
Chapter 72 Page 10
Issue: 30-Sep-2020
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Before performing engine test carry out preflight check
of the engine and the propeller in the range shown in the
AOI of Bristell B23
(Par. 4.3) and Rotax engine Operator’s
manual (Chapter 10.3).
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Start the engine according to the AOI of Bristell B23 (Par.
4.4) and Rotax engine Operator’s manual (Chapter
10.3).:
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Activate starter for max.10 sec. only, followed by a
cooling period of 2 min.
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As soon as engine runs, adjust throttle to achieved
smooth running at approximate 2500 rpm.
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Check if oil pressure has risen within 10 sec. and
monitor oil pressure
NOTE
If oil pressure does not rise within 10 sec. above min. pressure 0.8
bar (12 psi), switch off the engine. Is admissible max. oil pressure 7
bar (102 psi) for a short period at cold start. Fuel pressure has to be
in range from 0.15 to 0.4 bar (2.2 to 5.8 psi).
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Engine warm up according to the AOI of Bristell B23 (Par.
4.4) and Rotax engine Operator’s manual (Chapter 10.3).
As soon as oil pressure will be in range from 2 to 5 bar (29 to 73 psi)
start warming up period at 2000 rpm for approx. 2 minutes, continue
at 2500 rpm, duration depending on ambient temperature, until oil
temperature reaches 50°C (122°F).
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Choke
–
during engine warm up
–
SWITCH OFF
NOTE
Watch engine instruments and record the values of oil pressure, oil
temperature and head cylinder temperature into the Engine test
report, see the Tab. 10
–
1.
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Perform ignition check:
Engine speed: 4000 RPM
Ignition switch switch from position BOTH to L, record RPM drop
Ignition switch switch from position BOTH to R, record RPM drop
NOTE
RPM drop between position BOTH and L or R must not exceed 300
RPM. Mutual difference between ignition circuits L and R must not
