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planning situations regarding in-motion towrope
breaks, uncommanded release, or power loss of the towplane.
While the best course of action depends on many
variables, such as runway length, airport environment,
and wind, all tow failures have one thing in common:
the need to maintain control of the glider. Two possibilities
are stalling the glider, or dragging a wingtip on the
ground during a low altitude turn and cartwheeling the
glider. [Figure 7-5]
Situation 1. If the towrope breaks or is inadvertently
released prior to the towplane’s liftoff, the standard
procedure is for the towplane to continue the takeoff
and clear the runway, or abort the takeoff and remain
on the left side of the runway. If the towplane loses
power during the takeoff, the towpilot should maneuver
the towplane to the left side of the runway. If the
glider is still on the runway, the glider pilot should pull
Upwind Wing Slightly Lower
Than Downwind Wing
Full Downwind Rudder Deflection to
Start Crosswind Takeoff Roll
Figure 7-4. Crosswind correction or takeoff.
7-5
the release, decelerate using the wheel brake, and be
prepared to maneuver to the right side of the runway. If
the rope breaks, is inadvertently released, or the towplane
loses power after the glider is airborne, the glider
pilot should pull the towrope release, land straight
ahead, and be prepared to maneuver to the right side of
the runway. Pulling the towrope release in either case
ensures that the rope is clear of the glider. Since local
procedures vary, both the glider and towpilot must be
familiar with the specific gliderport/airport procedures.
Situation 2. This situation occurs when both the towplane
and glider are airborne and at a low altitude. If an
inadvertent release, towrope break, or a signal to
release from the towplane occurs at a point in which
the glider has insufficient runway directly ahead and
has insufficient altitude to make a safe turn, the best
course of action is to land the glider straight ahead.
After touchdown, use wheel brake, as necessary, to
slow and stop as conditions permit. At low altitude,
attempting to turn prior to landing is very risky because
of the likelihood of dragging a wingtip on the ground
and cartwheeling the glider. Slowing the glider as much
as possible prior to touching down and rolling onto
unknown terrain generally is the safest course of action.
Low speed means low impact forces, which reduce the
likelihood of injury and reduce the risk of significant
damage to the glider.
Situation 3. If an inadvertent release, towrope break, or
a signal to release from the towplane occurs after the
Very low altitude, premature
release/rope break with runway
still available. Land on runway,
use wheel break to stop. If
necessary alter course to the
right to avoid towplane.
Very low altitude,
premature release/rope break
with insuficient runway available.
Above 200 ft. if suitable, turn into wind,
make 180° turn, land downwind.
At higher altitudes, multiple options
are usually available.
Figure 7-5. Situations for towline break, uncommanded release, or power loss of the towplane.
7-6
towplane and glider are airborne, and the glider possesses
sufficient altitude to make a 180° turn, then a
downwind landing on the departure runway may be
attempted.
The 180° turn and downwind landing option should be
used only if the glider is within gliding distance of the
airport or landing area. In ideal conditions, a minimum
altitude of 200 feet above ground level is required to complete
this maneuver safely. Such things as a hot day, weak
towplane, strong wind, or other traffic may require a
greater altitude to make a return to the airport a viable
option.
The responsibility of the glider pilot is to avoid the
towplane or other aircraft. If the tow was terminated
because the towplane was in distress, the towpilot is
also dealing with an emergency situation and may
maneuver the aircraft abruptly.
After releasing from the towplane at low altitude, if the
glider pilot chooses to make a 180° turn and a downwind
landing, the first responsibility is to maintain flying
speed. The pilot must immediately lower the nose
to achieve the proper pitch attitude necessary to maintain
the appropriate approach airspeed.
Make the initial turn into the wind. Use a medium bank
angle to align the glider with the landing area. Using
too shallow a bank angle may not allow enough time
for the glider to align with the landing area. Too steep
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Glider Flying Handbook(58)
