
VII-12
February 2008
Legacy
VII-13
February 2008
Legacy
recommendation must be used. This is particularly important for the breaking in
of a new engine. For specifics see the manufacturer’s engine operating manual for
recommendations for
your
engine.
RPM:
Fixed pitch propellers have blade angles such that with full power being
developed by the engine the R.P.M. is limited to less than its allowable RPM.
Controllable propellers are likewise limiting (by changing pitch of the blades) to
keep the engine rpm under dangerous levels to prevent overstressing the rotating
parts.
High speed descents at high power settings with a fixed pitch propeller may allow
overspeeding of the engine, thus RPM needs to be monitored closely.
CHT:
Cylinder head temperature is a measure of engine cooling airflow and is
a measure of an adequately warm engine to accept full power for takeoff. Since
the Lancair is tightly cowled, high power settings at low airspeeds (slow climb
speeds for example) should always be monitored for high CHT readings. Exces-
sive CHT levels will result in damage and/or reduced engine life. Poor cooling
can also result from improper baffles, bird nests in the engine compartment, etc.
and must be avoided.
EGT & Engine Monitors:
A measure of optimum fuel/air ratio is available by
sensing the temperature of the exhaust gases. Operating the engine at or near its
peak exhaust temperature means that you are operating at the near optimum fuel/air
ratio. Exhaust gas temperature is kept within limits indirectly by establishing the
proper mixture for that power setting. A direct measurement of EGT is common and
many devices are available in this regard. Some measure only the hottest cylinder,
others measure all six. Some measure both EGT and cylinder head temperature,
monitor both continuously and have alarms. Since an EGT is both a monitor of
engine health, and a means of proper mixture setting it is highly recommended and
will pay for itself in the long run by reduced fuel consumption and engine mainte-
nance as well as extended life. An added benefit of these multiple sensor systems
is that trouble shooting is enhanced significantly and deteriorating situations can
be seen early and caught before mechanical damage occurs or dangerous in-flight
situations develop. These systems are also ideal for insuring that your new aircraft
is properly baffled and sealed at the start.
Carbureted engines require a system to add heat to the intake air to eliminate ice
which forms in the carburetor due to the vaporization of the fuel in the carburetor
which lowers temperatures in the carburetor throat. This carburetor heat valve
ducts air, warmed by the engine exhaust system, into the intake system. It is a vari-
able valve, i.e., it can be modulated to provide partial hot air,but should generally
be used “full hot” initially if ice is thought to be present. With the application of
Содержание Legacy
Страница 6: ...Legacy ...
Страница 8: ...I 2 February 2008 Legacy Intentionally Left Blank ...
Страница 20: ...I 14 February 2008 Legacy NOTES ...
Страница 21: ...I 15 February 2008 Legacy NOTES ...
Страница 22: ...I 16 February 2008 Legacy NOTES ...
Страница 24: ...II 2 February 2008 Legacy Intentionally Left Blank ...
Страница 34: ...II 12 February 2008 Legacy NOTES ...
Страница 35: ...II 13 February 2008 Legacy NOTES ...
Страница 36: ...II 14 February 2008 Legacy NOTES ...
Страница 38: ...III 2 February 2008 Legacy Intentionally Left Blank ...
Страница 47: ...III 11 February 2008 Legacy NOTES ...
Страница 48: ...III 12 February 2008 Legacy NOTES ...
Страница 50: ...IV 2 February 2008 Legacy Intentionally Left Blank ...
Страница 69: ...IV 21 February 2008 Legacy NOTES ...
Страница 70: ...IV 22 February 2008 Legacy NOTES ...
Страница 72: ...V 2 February 2008 Legacy Intentionally Left Blank ...
Страница 90: ...V 20 February 2008 Legacy NOTES ...
Страница 91: ...V 21 February 2008 Legacy NOTES ...
Страница 92: ...V 22 February 2008 Legacy NOTES ...
Страница 94: ...VI 2 February 2008 Legacy Intentionally Left Blank ...
Страница 108: ...VI 16 February 2008 Legacy NOTES ...
Страница 110: ...VII 2 February 2008 Legacy Intentionally Left Blank ...
Страница 134: ...VII 26 February 2008 Legacy NOTES ...
Страница 135: ...VII 27 February 2008 Legacy NOTES ...
Страница 136: ...VII 28 February 2008 Legacy NOTES ...
Страница 138: ...VIII 2 February 2008 Legacy Intentionally Left Blank ...
Страница 158: ...VIII 22 February 2008 Legacy NOTES ...
Страница 160: ...IX 2 February 2008 Legacy Intentionally Left Blank ...
Страница 168: ...IX 10 February 2008 Legacy Emergency Procedures ...
Страница 169: ...IX 11 February 2008 Legacy Emergency Procedures ...
Страница 170: ...IX 12 February 2008 Legacy Emergency Procedures ...
Страница 171: ...IX 13 February 2008 Legacy Emergency Procedures Continued ...
Страница 172: ...IX 14 February 2008 Legacy Normal Procedures ...
Страница 173: ...IX 15 February 2008 Legacy Normal Procedures Continued ...
Страница 174: ...IX 16 February 2008 Legacy Performance System Description ...
Страница 175: ...IX 17 February 2008 Legacy Servicing and Maintenance Approved by ___________________ Date __________________________ ...
Страница 176: ...IX 18 February 2008 Legacy NOTES ...
Страница 178: ...X 2 February 2008 Legacy Intentionally Left Blank ...