Engineering and Research Corporation Ercoupe 415-C, Pilot Operating Handbook, Page: 7 / 27

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For example, the ERCOUPE, in a gliding turn with a 60⁰ bank and
the control wheel full back, will show an airspeed reading of about
63 MPH as compared with about 45 MPH in a straight glide with
the control wheel full back. Sharp turns naturally require steep
banks with the control wheel well back.
If the airplane is in a power-off glide and the speed is gradually
reduced by easing the wheel back, a mild jouncing or buffeting will
be noticed at about 3 MPH above the minimum stall speed. This is
caused by the burbling of the air flow at the juncture of the wing
and fuselage, and has been designed into the airplane as an active
warning that the minimum stall speed is being approached. The
airplane will fly satisfactorily at minimum speed with the wheel all
the way back in a glide, but the practice is not recommended at low
altitude because no reserve energy is available to overcome the
effects of gusty air or misjudgment.
If the control wheel is eased back gradually with power full on, the
airplane will reach an uncomfortable nose-high altitude. In this
condition, the flying will not be smooth or steady, but control can
be maintained.
CRUISING
The airplane may be trimmed to cruise at any desired speed with a
given throttle setting by adjusting the trim tab. In cruising flight,
the nose of the ERCOUPE appears to be down unusually far, which
gives good vision ahead. The cruising speed will be approximately
5 MPH higher with the windows closed. Therefore, to obtain the
best possible cruising performance, the windows should be closed
and the airplane should be flown at the highest altitude at which
cruising RPM can be maintained, due consideration being given, of
course to the wind and the weather
It is acceptable to cruise up to the red line placed on the
tachometer dial at 2275.
The air speed meter indicates the true air speed within
manufacturing tolerances for a definite cir density. This is the