Cub Crafters CC11-100 Pilot Operating Handbook page 60

SECTION 3 CUB CRAFTERS
EMERGENCY PROCEDURES CC11-100
3.4.3 TOTAL LOSS OF ENGINE POWER IN FLIGHT
If the engine loses power, whether this is a total or a
partial loss of power or if the engine runs roughly, the
most important thing to do is to continue flying the
aircraft, maintaining a safe airspeed. Trim the aircraft as
required. In case of a total loss of power, the best glide
speed is 68 mph or 59 knots (IAS) with flaps up.
The CC11-100 will glide 1.2 nautical miles for every 1000
feet of altitude loss. The rate of descent will be
approximately 715 feet per minute. Most GPS receivers
have a "Direct To" (commonly D → ) function that shows the
closest airports. Use charts to assess the topography of
airports in the immediate vicinity.
If there is enough altitude, try to determine the cause of
failure. In most cases the reason is fuel exhaustion due to
the selector being on an empty tank. Switching to the
BOTH position or to the opposite tank causes fuel to feed
to the engine. However, power will not be restored until
the air in the fuel lines is purged, and this may take a few
seconds.
Another common cause of engine failure is carburetor
ice. Unfortunately, if this is the case, an excessively rich
air/fuel mixture may have cooled the engine to the point
where there may not be sufficient hot air in the engine
compartment to melt the accumulation of carburetor ice,
even when the carburetor heat control is in the full "hot"
position. At this point the engine will not develop enough
power to maintain airspeed and altitude. It is of the
utmost importance that the guidelines concerning the use
of the carburetor heat given in paragraph 7.5.7 (Air
Induction System) of this manual be followed closely.
REPORT SC10000AFM
Issued: 08/01/06
Page Number: 3-16 Date of Revision: 11/23/18