5.F.1. Definition: This contest is a speed
event for radio controlled slope gliders. A minimum of four rounds
must be flown. The organiser shall run as many rounds as
the conditions and time permits.
5.F.2. Characteristics of Radio Controlled
Maximum surface area (St)
............................... 150 dm2
Maximum flying mass
........................................ 5 kg
Loading on St
.................................................... between 12
and 75 g/dm2
Minimum radius of fuselage nose 7.5 mm in all
orientations (see F3B nose definition for measuring
technique). The radio shall
be able to operate simultaneously with other equipment at the
normally used spacing in the allocated
R/C bands (i.e. 35 MHz : 10 kHz).
The competitor may use three models in the
contest. The competitor may combine the parts of the
models between the rounds provided the resulting model used
for flight conforms to the rules and that the
parts have been checked before the start of the contest.
Addition of ballast (which must be located
internally in the model) and/or change of angles of setting
are allowed. Variation of geometry or area is
allowed only if it is actuated at distance by radio
5.F.3. Competitor and Helpers: The
competitor must operate his radio equipment personally. Each
competitor is permitted one helper. The
helper is only to assist and advise the competitor until the model
is passing Base A for the first time and
after the timed flight is completed.
5.F.4. Definition of an Attempt: There is
an attempt when the model has left the hands of the competitor or
5.F.5. Number of Attempts: The competitor
has one attempt on each flight. An attempt can be repeated if:
a) the launching attempt is impeded, hindered
or aborted by circumstances beyond the control of the
competitor, duly witnessed by the official judges;
b) his model collides with another model in
flight or other impediment and the competitor is not to blame
on that account;
c) the flight was not judged by the fault of
d) the model (ie the fuselage nose) fails to
pass above a horizontal plane, level with the starting area,
within five seconds of exiting the course, due to
circumstances beyond the control of the competitor,
duly witnessed by the official judges.
The re-flight shall happen as soon as possible
considering the local conditions and the radio frequencies.
If possible, the model aircraft can stay airborne and has
to be brought to launching height, launching
speed and launching position before the new 30 second
period is started by the judge.
5.F.6. Cancellation of a Flight: A flight
is official when an attempt is carried out, whatever result is
A flight is official but gets a zero score if:
a) the competitor used a model not conforming
to FAI rules;
b) the model loses any part while airborne;
c) the helper advises the competitor during the
d) the model is controlled by anyone other than
e) the flight is not carried through;
f) the model lands outside the assigned landing
g) the model is not launched within 30 seconds
from the moment the starting order is given.
h) the model (i.e. the centre of gravity) fails
to pass above a horizontal plane, level with the starting area,
within five seconds of exiting the course.
5.F.7. Organisation of Starts: The flights
are to be performed round by round. The starting order is settled
by draw in accordance with the radio
The competitor is entitled to three minutes of
preparation time from the moment he is called to the ready
box. After the three minutes has elapsed, the starter may
give the order to start. After the starter has
given the order to start, the competitor or his helper is
to launch the model within 30 seconds. The
competitor or his helper is to launch the model by hand
from the starting area indicated by the organiser.
If possible, the starting area, including the
audio system, shall be situated in the middle of the course
(equal distance from Base A and Base B).
The time from launch to the moment the model
enters the speed course must not exceed thirty seconds.
If the model has not entered the speed course
(i.e. first crossing of Base A in the direction of Base B)
within the thirty seconds, the flight time will commence
the moment the thirty seconds expires. If the
model has not entered the speed course within the thirty
seconds, this is to be announced by the judges.
5.F.8. The Flying Task: The flying task is
to fly 10 legs on a closed speed course of 100 metres in the
shortest possible time from the moment
the model first crosses Base A in the direction of Base B. If some
irremovable obstacles do not allow 100 m the course may be
shorter but not less then 80 m. This
exception does not apply for world or continental championships.
5.F.9. The Speed Course: The speed course
is laid out along the edge of the slope and is marked at both ends
with two clearly visible flags. The organiser must ensure
that the two turning planes are mutually parallel
and perpendicular to the slope.
Depending on the circumstances, the two planes
are marked respectively Base A and Base B.
Base A is the official starting plane. At Base
A and Base B, an Official announces the passing of the
model (i.e. the fuselage nose of the model) with a sound
signal when the model is flying out of the speed
course. Furthermore, in the case of Base A, a signal
announces the first time the model is crossing Base
A in the direction of Base B.
5.F.10. Safety: The organiser must clearly
mark a safety line representing a vertical plane which separates
the speed course from the area where
judges, other officials, competitors and spectators stay. Crossing
the safety line by any part of the model
aircraft during the measured flight will be penalised by 100
points subtracted from the sum after
conversion, the penalty not being discarded with the result of the
round. The organiser must appoint one
judge to observe, using an optical sighting device, any crossing
of the safety line.
5.F.11. Judging: The flights are judged by
two judges who do not have to be the same for all competitors.
The judges' task is to control that the flights are
performed according to the rules, to be time keepers and
to ensure that the right distance is flown.
5.F.12. Scoring: The result of the
flight is stated as the time in seconds and hundredths of seconds
obtained by each competitor. For the
purpose of calculating the result of the round, the competitor's
result is converted this way:
1000 x PI / PW
where PW is the best result in the round, and PI
is the competitor's result.
5.F.13. Classification: The sum of the
competitor's round scores will determine his position in the final
classification. If more than three rounds were flown the
lowest round score of each competitor will be
discarded and the others added to obtain the final score
which will determine his position in the final
classification. If more than fourteen rounds were flown,
the two lowest round scores will be discarded.
To avoid ties in the classification concerning
the five best scores, "classification rounds" are flown until
the ties are broken. If this is not possible, the result of
the discarded round will determine each
competitor's position in the final classification.
5.F.14. Organisation of the Contest: The
competition must be held at a site which is suitable for slope
soaring. When marking the starting and
landing areas and the turning planes, the organiser must take into
account the configuration of the terrain
and the wind direction.
5.F.15. Changes: Any changes in the flight
and landing areas may be made only between flight rounds.
5.F.16. Interruptions: A round in progress
must temporarily be interrupted if:-
a) the wind speed constantly is below 3 m/sec
or more than 25 m/sec.
b) the direction of the wind constantly
deviates more than 45O from a line perpendicular to the main
direction of the speed course.
If these conditions arise during the flight the
competitor is entitled to a re-flight.
A round in progress is to be cancelled if:
a) the interruption lasts more than thirty
b) fewer than 50% of the competitors have been
able to perform the task caused by marginal conditions.
Without the condition "constantly" (i.e. 20 seconds) have
been met and thus caused re-flights.