Schweizer 2-33, Руководство по эксплуатации

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A-CR-CCP-402/MB-001 SCHWEIZER 2-33 AOIs
3-11
USE of C OF G and FORWARD TOW HOOKS
23. Always use the forward tow hook for air tow. Winch or auto launches may be executed
using either the forward or the C of G tow hook, although using the C of G tow hook will result in
a higher launch altitude; there is no tendency to oscillate with either method.
LAUNCH SPEEDS
24. Air Tow: Normal air tow speeds are 65 to 70 mph. During transits, airspeeds may be
increased. If turbulence is encountered during transits, airspeed should be reduced.
25. Winch and Auto Launch: Normal climb speeds are in the range of 55 to 60 mph (25
mph above the stall speed) although the airspeed might vary at each stage of launch.
26. Max Winch and Auto Launch Speeds : If the airspeed continues to increase such that
the maximum launch speed may be exceeded, immediately reduce the climb angle (i.e. reduce
the pitch angle by lowering the nose) to prevent overstressing the glider. The airspeed should
be then stabilized at a safe speed. If this procedure is unsuccessful:
a. But the airspeed is still within acceptable limits, yaw the glider from side to side to
direct the winch operator to reduce power.
b. And the airspeed exceeds or will probably exceed the launch limit abort the launch
(release the glider). Be prepared to counter an abrupt nose-up moment.
27. Winch and Auto Launch Safety Speed. The ground launch safety speed for any glider
is based on the formula: 1.5V
s
. If the airspeed falls below the safe climbing speed, or continues
to decrease, the launch shall be immediately aborted (glider released) and a landing carried out.
28. Calculating Auto Launch Speeds : Various factors affect the required speed of the auto
launch vehicle, such as glider attitude, pilot technique, wind gradient, etc. The following
technique can be used to estimate the vehicle speeds required to safely auto launch a 2-33
glider:
a. Subtract the surface wind from the maximum launch speed;
b. Subtract an additional 5 mph as safety factor;
c. After the glider is in safe climb, reduce by 10 mph;
d. Subtract the surface wind again to accommodate wind gradient; and
e. Continually adjust vehicle speed to compensate for glider attitude, pilot technique,
wind gradient, etc.