Table of Contents
Advertisement
Section 5
5)
Break-in procedure:
for aircraft installation (in other applications proceed accordingly)
The break-in has
to
be performed with the engine installed,
properly
loaded, i.e.
propeller installed,
matched for
max.
r.p.m. In case of an aircraft, anchor the plane to the ground.
Run the engine
according
to the following graph:
Engine
,
.'
r.
p
.m·l
10 .
15
20
30
1
2
3
H 1000
...!e~_~e£._~e~_~e~ __
~in
mi~_!!Iin
max.
r.p.m.
(refer
page
32)
1
5,5
5
1
4,5
4
3,5
3
1116
2
y---. .
,
1
o
10
20
30
40
50
60
Time
(min.)
In case
of a free air engine it
is
possible that the
cooling air
flow
on ground
is
not enough to provide
the
necessary cooling for a longer period. Therefore it
is necessary to observe carefully the cylinder
head
temperature
(CRT)
during break in procedure
to avoid
overheating.
Before exceeding the
maximum allowed
CHT
of 250
0
C
/480 of interrupt
the
run-in
and cool
down
the engine at idle for
approximately one
minute
and continue where you
have
interrupted.
Be
sure to use a safe run-up
area,
to anchor
aircraft at those points approved
by
the airframe
manufacturer, and to have someone present who is able to shut off
the
engine instantly and to
prevent
unauthorized people entering the danger
area.
.
•
.
Proper clothing, ear protection etc. should be used on any engine run-up test.
•
After this
procedure the idle has to be adjusted. Then short
take-offs
can
be
conducted.
After a few
short
full-load take-offs, but not later than 2
hours
total
running time,
the cylinder head
nuts have to
be
re-torqued to 22 Nm (195 in.lb.). For this procedure
the
cylinder cowl (if any)
has to be taken off.
•
Engine must be cool for re-torquing of head.
Hide quick links:
Advertisement
Table of Contents
