BRM BRISTELL ELSA, Operation Instructions Manual

Page: 51 / 116

4-7
Date of Issue: 11/2017
Document No.: ELSA-AOI-2-1-0-US
Revision: -
4.4.3 Engine warm up, Engine check
4.4.3.1 Engine warm up
CAUTION
The engine check should be performed with the aircraft heading upwind
and not on a loose terrain (the propeller may suck grit which can damage
the leading edges of blades).
Prior to engine check block the main wheels using chocks. Initially warm up
the engine to 2000 rpm for approx. 2 minutes, then continue to 2500 rpm till
oil temperature reaches 50° (122°F). The warm up period depends on
ambient air temperature.
Check both ignition circuits at 4000 rpm for Rotax 912 ULS. The engine
speed drop during the time either magneto switched off should not over 300
rpm. The Max. engine speed drop difference between circuits A and B
should be 115 rpm.
NOTE
Only one ignition should be switched on (off) during ignition circuit check.
Set max. power for verification of max. speed with given propeller and
engine parameters (temperatures and pressures).
Check acceleration from idling to max. power. If necessary, cool the engine
at 3000 rpm before shutdown.
CAUTION
The engine check should be performed with the aircraft heading upwind
and not on a loose terrain (the propeller may suck grit which can damage
the leading edges of blades).
4.4.4 Taxiing
Apply power and brakes as needed. Apply brakes to control movement on
ground. Taxi carefully when wind velocity exceeds 20 knots (10 m/s). Hold
the control stick in neutral position, or in a position that properly deflects a
crosswind